Merge remote-tracking branch 'origin/main' into pr-104

# Conflicts:
# config.example.yaml
# internal/config/config.go
# sdk/cliproxy/auth/model_name_mappings.go

.github/workflows/docker-image.yml

@@ -7,7 +7,7 @@ on:
 
 env:
   APP_NAME: CLIProxyAPI
-  DOCKERHUB_REPO: eceasy/cli-proxy-api
+  DOCKERHUB_REPO: eceasy/cli-proxy-api-plus
 
 jobs:
   docker:
@@ -44,3 +44,4 @@ jobs:
           tags: |
             ${{ env.DOCKERHUB_REPO }}:latest
             ${{ env.DOCKERHUB_REPO }}:${{ env.VERSION }}
+

.github/workflows/release.yaml

@@ -23,7 +23,8 @@ jobs:
           cache: true
       - name: Generate Build Metadata
         run: |
-          echo VERSION=`git describe --tags --always --dirty` >> $GITHUB_ENV
+          VERSION=$(git describe --tags --always --dirty)
+          echo "VERSION=${VERSION}" >> $GITHUB_ENV
           echo COMMIT=`git rev-parse --short HEAD` >> $GITHUB_ENV
           echo BUILD_DATE=`date -u +%Y-%m-%dT%H:%M:%SZ` >> $GITHUB_ENV
       - uses: goreleaser/goreleaser-action@v4

.gitignore

@@ -1,5 +1,6 @@
 # Binaries
 cli-proxy-api
+cliproxy
 *.exe
 
 # Configuration
@@ -44,6 +45,7 @@ GEMINI.md
 .bmad/*
 _bmad/*
 _bmad-output/*
+.mcp/cache/
 
 # macOS
 .DS_Store

.goreleaser.yml

@@ -1,5 +1,5 @@
 builds:
-  - id: "cli-proxy-api"
+  - id: "cli-proxy-api-plus"
     env:
       - CGO_ENABLED=0
     goos:
@@ -10,11 +10,11 @@ builds:
       - amd64
       - arm64
     main: ./cmd/server/
-    binary: cli-proxy-api
+    binary: cli-proxy-api-plus
     ldflags:
-      - -s -w -X 'main.Version={{.Version}}' -X 'main.Commit={{.ShortCommit}}' -X 'main.BuildDate={{.Date}}'
+      - -s -w -X 'main.Version={{.Version}}-plus' -X 'main.Commit={{.ShortCommit}}' -X 'main.BuildDate={{.Date}}'
 archives:
-  - id: "cli-proxy-api"
+  - id: "cli-proxy-api-plus"
     format: tar.gz
     format_overrides:
       - goos: windows

Dockerfile

@@ -12,7 +12,7 @@ ARG VERSION=dev
 ARG COMMIT=none
 ARG BUILD_DATE=unknown
 
-RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w -X 'main.Version=${VERSION}' -X 'main.Commit=${COMMIT}' -X 'main.BuildDate=${BUILD_DATE}'" -o ./CLIProxyAPI ./cmd/server/
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w -X 'main.Version=${VERSION}-plus' -X 'main.Commit=${COMMIT}' -X 'main.BuildDate=${BUILD_DATE}'" -o ./CLIProxyAPIPlus ./cmd/server/
 
 FROM alpine:3.22.0
 
@@ -20,7 +20,7 @@ RUN apk add --no-cache tzdata
 
 RUN mkdir /CLIProxyAPI
 
-COPY --from=builder ./app/CLIProxyAPI /CLIProxyAPI/CLIProxyAPI
+COPY --from=builder ./app/CLIProxyAPIPlus /CLIProxyAPI/CLIProxyAPIPlus
 
 COPY config.example.yaml /CLIProxyAPI/config.example.yaml
 
@@ -32,4 +32,4 @@ ENV TZ=Asia/Shanghai
 
 RUN cp /usr/share/zoneinfo/${TZ} /etc/localtime && echo "${TZ}" > /etc/timezone
 
-CMD ["./CLIProxyAPI"]
+CMD ["./CLIProxyAPIPlus"]

README.md

@@ -1,148 +1,23 @@
-# CLI Proxy API
+# CLIProxyAPI Plus
 
-English | [中文](README_CN.md)
+English | [Chinese](README_CN.md)
 
-A proxy server that provides OpenAI/Gemini/Claude/Codex compatible API interfaces for CLI.
+This is the Plus version of [CLIProxyAPI](https://github.com/router-for-me/CLIProxyAPI), adding support for third-party providers on top of the mainline project.
 
-It now also supports OpenAI Codex (GPT models) and Claude Code via OAuth.
+All third-party provider support is maintained by community contributors; CLIProxyAPI does not provide technical support. Please contact the corresponding community maintainer if you need assistance.
 
-So you can use local or multi-account CLI access with OpenAI(include Responses)/Gemini/Claude-compatible clients and SDKs.
+The Plus release stays in lockstep with the mainline features.
 
-## Sponsor
+## Differences from the Mainline
 
-[![z.ai](https://assets.router-for.me/english-4.7.png)](https://z.ai/subscribe?ic=8JVLJQFSKB)
-
-This project is sponsored by Z.ai, supporting us with their GLM CODING PLAN.
-
-GLM CODING PLAN is a subscription service designed for AI coding, starting at just $3/month. It provides access to their flagship GLM-4.7 model across 10+ popular AI coding tools (Claude Code, Cline, Roo Code, etc.), offering developers top-tier, fast, and stable coding experiences.
-
-Get 10% OFF GLM CODING PLAN：https://z.ai/subscribe?ic=8JVLJQFSKB
-
----
-
-<table>
-<tbody>
-<tr>
-<td width="180"><a href="https://www.packyapi.com/register?aff=cliproxyapi"><img src="./assets/packycode.png" alt="PackyCode" width="150"></a></td>
-<td>Thanks to PackyCode for sponsoring this project! PackyCode is a reliable and efficient API relay service provider, offering relay services for Claude Code, Codex, Gemini, and more. PackyCode provides special discounts for our software users: register using <a href="https://www.packyapi.com/register?aff=cliproxyapi">this link</a> and enter the "cliproxyapi" promo code during recharge to get 10% off.</td>
-</tr>
-<tr>
-<td width="180"><a href="https://cubence.com/signup?code=CLIPROXYAPI&source=cpa"><img src="./assets/cubence.png" alt="Cubence" width="150"></a></td>
-<td>Thanks to Cubence for sponsoring this project! Cubence is a reliable and efficient API relay service provider, offering relay services for Claude Code, Codex, Gemini, and more. Cubence provides special discounts for our software users: register using <a href="https://cubence.com/signup?code=CLIPROXYAPI&source=cpa">this link</a> and enter the "CLIPROXYAPI" promo code during recharge to get 10% off.</td>
-</tr>
-</tbody>
-</table>
-
-## Overview
-
-- OpenAI/Gemini/Claude compatible API endpoints for CLI models
-- OpenAI Codex support (GPT models) via OAuth login
-- Claude Code support via OAuth login
-- Qwen Code support via OAuth login
-- iFlow support via OAuth login
-- Amp CLI and IDE extensions support with provider routing
-- Streaming and non-streaming responses
-- Function calling/tools support
-- Multimodal input support (text and images)
-- Multiple accounts with round-robin load balancing (Gemini, OpenAI, Claude, Qwen and iFlow)
-- Simple CLI authentication flows (Gemini, OpenAI, Claude, Qwen and iFlow)
-- Generative Language API Key support
-- AI Studio Build multi-account load balancing
-- Gemini CLI multi-account load balancing
-- Claude Code multi-account load balancing
-- Qwen Code multi-account load balancing
-- iFlow multi-account load balancing
-- OpenAI Codex multi-account load balancing
-- OpenAI-compatible upstream providers via config (e.g., OpenRouter)
-- Reusable Go SDK for embedding the proxy (see `docs/sdk-usage.md`)
-
-## Getting Started
-
-CLIProxyAPI Guides: [https://help.router-for.me/](https://help.router-for.me/)
-
-## Management API
-
-see [MANAGEMENT_API.md](https://help.router-for.me/management/api)
-
-## Amp CLI Support
-
-CLIProxyAPI includes integrated support for [Amp CLI](https://ampcode.com) and Amp IDE extensions, enabling you to use your Google/ChatGPT/Claude OAuth subscriptions with Amp's coding tools:
-
-- Provider route aliases for Amp's API patterns (`/api/provider/{provider}/v1...`)
-- Management proxy for OAuth authentication and account features
-- Smart model fallback with automatic routing
-- **Model mapping** to route unavailable models to alternatives (e.g., `claude-opus-4.5` → `claude-sonnet-4`)
-- Security-first design with localhost-only management endpoints
-
-**→ [Complete Amp CLI Integration Guide](https://help.router-for.me/agent-client/amp-cli.html)**
-
-## SDK Docs
-
-- Usage: [docs/sdk-usage.md](docs/sdk-usage.md)
-- Advanced (executors & translators): [docs/sdk-advanced.md](docs/sdk-advanced.md)
-- Access: [docs/sdk-access.md](docs/sdk-access.md)
-- Watcher: [docs/sdk-watcher.md](docs/sdk-watcher.md)
-- Custom Provider Example: `examples/custom-provider`
+- Added GitHub Copilot support (OAuth login), provided by [em4go](https://github.com/em4go/CLIProxyAPI/tree/feature/github-copilot-auth)
+- Added Kiro (AWS CodeWhisperer) support (OAuth login), provided by [fuko2935](https://github.com/fuko2935/CLIProxyAPI/tree/feature/kiro-integration), [Ravens2121](https://github.com/Ravens2121/CLIProxyAPIPlus/)
 
 ## Contributing
 
-Contributions are welcome! Please feel free to submit a Pull Request.
-
-1. Fork the repository
-2. Create your feature branch (`git checkout -b feature/amazing-feature`)
-3. Commit your changes (`git commit -m 'Add some amazing feature'`)
-4. Push to the branch (`git push origin feature/amazing-feature`)
-5. Open a Pull Request
-
-## Who is with us?
-
-Those projects are based on CLIProxyAPI:
-
-### [vibeproxy](https://github.com/automazeio/vibeproxy)
-
-Native macOS menu bar app to use your Claude Code & ChatGPT subscriptions with AI coding tools - no API keys needed
-
-### [Subtitle Translator](https://github.com/VjayC/SRT-Subtitle-Translator-Validator)
-
-Browser-based tool to translate SRT subtitles using your Gemini subscription via CLIProxyAPI with automatic validation/error correction - no API keys needed
-
-### [CCS (Claude Code Switch)](https://github.com/kaitranntt/ccs)
-
-CLI wrapper for instant switching between multiple Claude accounts and alternative models (Gemini, Codex, Antigravity) via CLIProxyAPI OAuth - no API keys needed
-
-### [ProxyPal](https://github.com/heyhuynhgiabuu/proxypal)
-
-Native macOS GUI for managing CLIProxyAPI: configure providers, model mappings, and endpoints via OAuth - no API keys needed.
-
-### [Quotio](https://github.com/nguyenphutrong/quotio)
-
-Native macOS menu bar app that unifies Claude, Gemini, OpenAI, Qwen, and Antigravity subscriptions with real-time quota tracking and smart auto-failover for AI coding tools like Claude Code, OpenCode, and Droid - no API keys needed.
-
-### [CodMate](https://github.com/loocor/CodMate)
-
-Native macOS SwiftUI app for managing CLI AI sessions (Codex, Claude Code, Gemini CLI) with unified provider management, Git review, project organization, global search, and terminal integration. Integrates CLIProxyAPI to provide OAuth authentication for Codex, Claude, Gemini, Antigravity, and Qwen Code, with built-in and third-party provider rerouting through a single proxy endpoint - no API keys needed for OAuth providers.
-
-### [ProxyPilot](https://github.com/Finesssee/ProxyPilot)
-
-Windows-native CLIProxyAPI fork with TUI, system tray, and multi-provider OAuth for AI coding tools - no API keys needed.
-
-### [Claude Proxy VSCode](https://github.com/uzhao/claude-proxy-vscode)
-
-VSCode extension for quick switching between Claude Code models, featuring integrated CLIProxyAPI as its backend with automatic background lifecycle management.
-
-> [!NOTE]  
-> If you developed a project based on CLIProxyAPI, please open a PR to add it to this list.
-
-## More choices
-
-Those projects are ports of CLIProxyAPI or inspired by it:
-
-### [9Router](https://github.com/decolua/9router)
-
-A Next.js implementation inspired by CLIProxyAPI, easy to install and use, built from scratch with format translation (OpenAI/Claude/Gemini/Ollama), combo system with auto-fallback, multi-account management with exponential backoff, a Next.js web dashboard, and support for CLI tools (Cursor, Claude Code, Cline, RooCode) - no API keys needed.
+This project only accepts pull requests that relate to third-party provider support. Any pull requests unrelated to third-party provider support will be rejected.
 
-> [!NOTE]  
-> If you have developed a port of CLIProxyAPI or a project inspired by it, please open a PR to add it to this list.
+If you need to submit any non-third-party provider changes, please open them against the mainline repository.
 
 ## License
 

README_CN.md

@@ -1,156 +1,24 @@
-# CLI 代理 API
+# CLIProxyAPI Plus
 
 [English](README.md) | 中文
 
-一个为 CLI 提供 OpenAI/Gemini/Claude/Codex 兼容 API 接口的代理服务器。
+这是 [CLIProxyAPI](https://github.com/router-for-me/CLIProxyAPI) 的 Plus 版本，在原有基础上增加了第三方供应商的支持。
 
-现已支持通过 OAuth 登录接入 OpenAI Codex（GPT 系列）和 Claude Code。
+所有的第三方供应商支持都由第三方社区维护者提供，CLIProxyAPI 不提供技术支持。如需取得支持，请与对应的社区维护者联系。
 
-您可以使用本地或多账户的CLI方式，通过任何与 OpenAI（包括Responses）/Gemini/Claude 兼容的客户端和SDK进行访问。
+该 Plus 版本的主线功能与主线功能强制同步。
 
-## 赞助商
+## 与主线版本版本差异
 
-[![bigmodel.cn](https://assets.router-for.me/chinese-4.7.png)](https://www.bigmodel.cn/claude-code?ic=RRVJPB5SII)
-
-本项目由 Z智谱 提供赞助, 他们通过 GLM CODING PLAN 对本项目提供技术支持。
-
-GLM CODING PLAN 是专为AI编码打造的订阅套餐，每月最低仅需20元，即可在十余款主流AI编码工具如 Claude Code、Cline、Roo Code 中畅享智谱旗舰模型GLM-4.7，为开发者提供顶尖的编码体验。
-
-智谱AI为本软件提供了特别优惠，使用以下链接购买可以享受九折优惠：https://www.bigmodel.cn/claude-code?ic=RRVJPB5SII
-
----
-
-<table>
-<tbody>
-<tr>
-<td width="180"><a href="https://www.packyapi.com/register?aff=cliproxyapi"><img src="./assets/packycode.png" alt="PackyCode" width="150"></a></td>
-<td>感谢 PackyCode 对本项目的赞助！PackyCode 是一家可靠高效的 API 中转服务商，提供 Claude Code、Codex、Gemini 等多种服务的中转。PackyCode 为本软件用户提供了特别优惠：使用<a href="https://www.packyapi.com/register?aff=cliproxyapi">此链接</a>注册，并在充值时输入 "cliproxyapi" 优惠码即可享受九折优惠。</td>
-</tr>
-<tr>
-<td width="180"><a href="https://cubence.com/signup?code=CLIPROXYAPI&source=cpa"><img src="./assets/cubence.png" alt="Cubence" width="150"></a></td>
-<td>感谢 Cubence 对本项目的赞助！Cubence 是一家可靠高效的 API 中转服务商，提供 Claude Code、Codex、Gemini 等多种服务的中转。Cubence 为本软件用户提供了特别优惠：使用<a href="https://cubence.com/signup?code=CLIPROXYAPI&source=cpa">此链接</a>注册，并在充值时输入 "CLIPROXYAPI" 优惠码即可享受九折优惠。</td>
-</tr>
-</tbody>
-</table>
-
-
-## 功能特性
-
-- 为 CLI 模型提供 OpenAI/Gemini/Claude/Codex 兼容的 API 端点
-- 新增 OpenAI Codex（GPT 系列）支持（OAuth 登录）
-- 新增 Claude Code 支持（OAuth 登录）
-- 新增 Qwen Code 支持（OAuth 登录）
-- 新增 iFlow 支持（OAuth 登录）
-- 支持流式与非流式响应
-- 函数调用/工具支持
-- 多模态输入（文本、图片）
-- 多账户支持与轮询负载均衡（Gemini、OpenAI、Claude、Qwen 与 iFlow）
-- 简单的 CLI 身份验证流程（Gemini、OpenAI、Claude、Qwen 与 iFlow）
-- 支持 Gemini AIStudio API 密钥
-- 支持 AI Studio Build 多账户轮询
-- 支持 Gemini CLI 多账户轮询
-- 支持 Claude Code 多账户轮询
-- 支持 Qwen Code 多账户轮询
-- 支持 iFlow 多账户轮询
-- 支持 OpenAI Codex 多账户轮询
-- 通过配置接入上游 OpenAI 兼容提供商（例如 OpenRouter）
-- 可复用的 Go SDK（见 `docs/sdk-usage_CN.md`）
-
-## 新手入门
-
-CLIProxyAPI 用户手册： [https://help.router-for.me/](https://help.router-for.me/cn/)
-
-## 管理 API 文档
-
-请参见 [MANAGEMENT_API_CN.md](https://help.router-for.me/cn/management/api)
-
-## Amp CLI 支持
-
-CLIProxyAPI 已内置对 [Amp CLI](https://ampcode.com) 和 Amp IDE 扩展的支持，可让你使用自己的 Google/ChatGPT/Claude OAuth 订阅来配合 Amp 编码工具：
-
-- 提供商路由别名，兼容 Amp 的 API 路径模式（`/api/provider/{provider}/v1...`）
-- 管理代理，处理 OAuth 认证和账号功能
-- 智能模型回退与自动路由
-- 以安全为先的设计，管理端点仅限 localhost
-
-**→ [Amp CLI 完整集成指南](https://help.router-for.me/cn/agent-client/amp-cli.html)**
-
-## SDK 文档
-
-- 使用文档：[docs/sdk-usage_CN.md](docs/sdk-usage_CN.md)
-- 高级（执行器与翻译器）：[docs/sdk-advanced_CN.md](docs/sdk-advanced_CN.md)
-- 认证: [docs/sdk-access_CN.md](docs/sdk-access_CN.md)
-- 凭据加载/更新: [docs/sdk-watcher_CN.md](docs/sdk-watcher_CN.md)
-- 自定义 Provider 示例：`examples/custom-provider`
+- 新增 GitHub Copilot 支持（OAuth 登录），由[em4go](https://github.com/em4go/CLIProxyAPI/tree/feature/github-copilot-auth)提供
+- 新增 Kiro (AWS CodeWhisperer) 支持 (OAuth 登录), 由[fuko2935](https://github.com/fuko2935/CLIProxyAPI/tree/feature/kiro-integration)、[Ravens2121](https://github.com/Ravens2121/CLIProxyAPIPlus/)提供
 
 ## 贡献
 
-欢迎贡献！请随时提交 Pull Request。
-
-1. Fork 仓库
-2. 创建您的功能分支（`git checkout -b feature/amazing-feature`）
-3. 提交您的更改（`git commit -m 'Add some amazing feature'`）
-4. 推送到分支（`git push origin feature/amazing-feature`）
-5. 打开 Pull Request
-
-## 谁与我们在一起？
-
-这些项目基于 CLIProxyAPI:
-
-### [vibeproxy](https://github.com/automazeio/vibeproxy)
-
-一个原生 macOS 菜单栏应用，让您可以使用 Claude Code & ChatGPT 订阅服务和 AI 编程工具，无需 API 密钥。
+该项目仅接受第三方供应商支持的 Pull Request。任何非第三方供应商支持的 Pull Request 都将被拒绝。
 
-### [Subtitle Translator](https://github.com/VjayC/SRT-Subtitle-Translator-Validator)
-
-一款基于浏览器的 SRT 字幕翻译工具，可通过 CLI 代理 API 使用您的 Gemini 订阅。内置自动验证与错误修正功能，无需 API 密钥。
-
-### [CCS (Claude Code Switch)](https://github.com/kaitranntt/ccs)
-
-CLI 封装器，用于通过 CLIProxyAPI OAuth 即时切换多个 Claude 账户和替代模型（Gemini, Codex, Antigravity），无需 API 密钥。
-
-### [ProxyPal](https://github.com/heyhuynhgiabuu/proxypal)
-
-基于 macOS 平台的原生 CLIProxyAPI GUI：配置供应商、模型映射以及OAuth端点，无需 API 密钥。
-
-### [Quotio](https://github.com/nguyenphutrong/quotio)
-
-原生 macOS 菜单栏应用，统一管理 Claude、Gemini、OpenAI、Qwen 和 Antigravity 订阅，提供实时配额追踪和智能自动故障转移，支持 Claude Code、OpenCode 和 Droid 等 AI 编程工具，无需 API 密钥。
-
-### [CodMate](https://github.com/loocor/CodMate)
-
-原生 macOS SwiftUI 应用，用于管理 CLI AI 会话（Claude Code、Codex、Gemini CLI），提供统一的提供商管理、Git 审查、项目组织、全局搜索和终端集成。集成 CLIProxyAPI 为 Codex、Claude、Gemini、Antigravity 和 Qwen Code 提供统一的 OAuth 认证，支持内置和第三方提供商通过单一代理端点重路由 - OAuth 提供商无需 API 密钥。
-
-### [ProxyPilot](https://github.com/Finesssee/ProxyPilot)
-
-原生 Windows CLIProxyAPI 分支，集成 TUI、系统托盘及多服务商 OAuth 认证，专为 AI 编程工具打造，无需 API 密钥。
-
-### [Claude Proxy VSCode](https://github.com/uzhao/claude-proxy-vscode)
-
-一款 VSCode 扩展，提供了在 VSCode 中快速切换 Claude Code 模型的功能，内置 CLIProxyAPI 作为其后端，支持后台自动启动和关闭。
-
-> [!NOTE]  
-> 如果你开发了基于 CLIProxyAPI 的项目，请提交一个 PR（拉取请求）将其添加到此列表中。
-
-## 更多选择
-
-以下项目是 CLIProxyAPI 的移植版或受其启发：
-
-### [9Router](https://github.com/decolua/9router)
-
-基于 Next.js 的实现，灵感来自 CLIProxyAPI，易于安装使用；自研格式转换（OpenAI/Claude/Gemini/Ollama）、组合系统与自动回退、多账户管理（指数退避）、Next.js Web 控制台，并支持 Cursor、Claude Code、Cline、RooCode 等 CLI 工具，无需 API 密钥。
-
-> [!NOTE]  
-> 如果你开发了 CLIProxyAPI 的移植或衍生项目，请提交 PR 将其添加到此列表中。
+如果需要提交任何非第三方供应商支持的 Pull Request，请提交到主线版本。
 
 ## 许可证
 
-此项目根据 MIT 许可证授权 - 有关详细信息，请参阅 [LICENSE](LICENSE) 文件。
-
-## 写给所有中国网友的
-
-QQ 群：188637136
-
-或
-
-Telegram 群：https://t.me/CLIProxyAPI
+此项目根据 MIT 许可证授权 - 有关详细信息，请参阅 [LICENSE](LICENSE) 文件。

cmd/server/main.go

@@ -47,6 +47,19 @@ func init() {
 	buildinfo.BuildDate = BuildDate
 }
 
+// setKiroIncognitoMode sets the incognito browser mode for Kiro authentication.
+// Kiro defaults to incognito mode for multi-account support.
+// Users can explicitly override with --incognito or --no-incognito flags.
+func setKiroIncognitoMode(cfg *config.Config, useIncognito, noIncognito bool) {
+	if useIncognito {
+		cfg.IncognitoBrowser = true
+	} else if noIncognito {
+		cfg.IncognitoBrowser = false
+	} else {
+		cfg.IncognitoBrowser = true // Kiro default
+	}
+}
+
 // main is the entry point of the application.
 // It parses command-line flags, loads configuration, and starts the appropriate
 // service based on the provided flags (login, codex-login, or server mode).
@@ -63,10 +76,18 @@ func main() {
 	var noBrowser bool
 	var oauthCallbackPort int
 	var antigravityLogin bool
+	var kiroLogin bool
+	var kiroGoogleLogin bool
+	var kiroAWSLogin bool
+	var kiroAWSAuthCode bool
+	var kiroImport bool
+	var githubCopilotLogin bool
 	var projectID string
 	var vertexImport string
 	var configPath string
 	var password string
+	var noIncognito bool
+	var useIncognito bool
 
 	// Define command-line flags for different operation modes.
 	flag.BoolVar(&login, "login", false, "Login Google Account")
@@ -77,7 +98,15 @@ func main() {
 	flag.BoolVar(&iflowCookie, "iflow-cookie", false, "Login to iFlow using Cookie")
 	flag.BoolVar(&noBrowser, "no-browser", false, "Don't open browser automatically for OAuth")
 	flag.IntVar(&oauthCallbackPort, "oauth-callback-port", 0, "Override OAuth callback port (defaults to provider-specific port)")
+	flag.BoolVar(&useIncognito, "incognito", false, "Open browser in incognito/private mode for OAuth (useful for multiple accounts)")
+	flag.BoolVar(&noIncognito, "no-incognito", false, "Force disable incognito mode (uses existing browser session)")
 	flag.BoolVar(&antigravityLogin, "antigravity-login", false, "Login to Antigravity using OAuth")
+	flag.BoolVar(&kiroLogin, "kiro-login", false, "Login to Kiro using Google OAuth")
+	flag.BoolVar(&kiroGoogleLogin, "kiro-google-login", false, "Login to Kiro using Google OAuth (same as --kiro-login)")
+	flag.BoolVar(&kiroAWSLogin, "kiro-aws-login", false, "Login to Kiro using AWS Builder ID (device code flow)")
+	flag.BoolVar(&kiroAWSAuthCode, "kiro-aws-authcode", false, "Login to Kiro using AWS Builder ID (authorization code flow, better UX)")
+	flag.BoolVar(&kiroImport, "kiro-import", false, "Import Kiro token from Kiro IDE (~/.aws/sso/cache/kiro-auth-token.json)")
+	flag.BoolVar(&githubCopilotLogin, "github-copilot-login", false, "Login to GitHub Copilot using device flow")
 	flag.StringVar(&projectID, "project_id", "", "Project ID (Gemini only, not required)")
 	flag.StringVar(&configPath, "config", DefaultConfigPath, "Configure File Path")
 	flag.StringVar(&vertexImport, "vertex-import", "", "Import Vertex service account key JSON file")
@@ -456,6 +485,9 @@ func main() {
 	} else if antigravityLogin {
 		// Handle Antigravity login
 		cmd.DoAntigravityLogin(cfg, options)
+	} else if githubCopilotLogin {
+		// Handle GitHub Copilot login
+		cmd.DoGitHubCopilotLogin(cfg, options)
 	} else if codexLogin {
 		// Handle Codex login
 		cmd.DoCodexLogin(cfg, options)
@@ -468,6 +500,30 @@ func main() {
 		cmd.DoIFlowLogin(cfg, options)
 	} else if iflowCookie {
 		cmd.DoIFlowCookieAuth(cfg, options)
+	} else if kiroLogin {
+		// For Kiro auth, default to incognito mode for multi-account support
+		// Users can explicitly override with --no-incognito
+		// Note: This config mutation is safe - auth commands exit after completion
+		// and don't share config with StartService (which is in the else branch)
+		setKiroIncognitoMode(cfg, useIncognito, noIncognito)
+		cmd.DoKiroLogin(cfg, options)
+	} else if kiroGoogleLogin {
+		// For Kiro auth, default to incognito mode for multi-account support
+		// Users can explicitly override with --no-incognito
+		// Note: This config mutation is safe - auth commands exit after completion
+		setKiroIncognitoMode(cfg, useIncognito, noIncognito)
+		cmd.DoKiroGoogleLogin(cfg, options)
+	} else if kiroAWSLogin {
+		// For Kiro auth, default to incognito mode for multi-account support
+		// Users can explicitly override with --no-incognito
+		setKiroIncognitoMode(cfg, useIncognito, noIncognito)
+		cmd.DoKiroAWSLogin(cfg, options)
+	} else if kiroAWSAuthCode {
+		// For Kiro auth with authorization code flow (better UX)
+		setKiroIncognitoMode(cfg, useIncognito, noIncognito)
+		cmd.DoKiroAWSAuthCodeLogin(cfg, options)
+	} else if kiroImport {
+		cmd.DoKiroImport(cfg, options)
 	} else {
 		// In cloud deploy mode without config file, just wait for shutdown signals
 		if isCloudDeploy && !configFileExists {

config.example.yaml

@@ -43,6 +43,11 @@ debug: false
 # When true, disable high-overhead HTTP middleware features to reduce per-request memory usage under high concurrency.
 commercial-mode: false
 
+# Open OAuth URLs in incognito/private browser mode.
+# Useful when you want to login with a different account without logging out from your current session.
+# Default: false (but Kiro auth defaults to true for multi-account support)
+incognito-browser: true
+
 # When true, write application logs to rotating files instead of stdout
 logging-to-file: false
 
@@ -138,6 +143,16 @@ nonstream-keepalive-interval: 0
 #       - "*-thinking"               # wildcard matching suffix (e.g. claude-opus-4-5-thinking)
 #       - "*haiku*"                  # wildcard matching substring (e.g. claude-3-5-haiku-20241022)
 
+# Kiro (AWS CodeWhisperer) configuration
+# Note: Kiro API currently only operates in us-east-1 region
+#kiro:
+#  - token-file: "~/.aws/sso/cache/kiro-auth-token.json" # path to Kiro token file
+#    agent-task-type: "" # optional: "vibe" or empty (API default)
+#  - access-token: "aoaAAAAA..." # or provide tokens directly
+#    refresh-token: "aorAAAAA..."
+#    profile-arn: "arn:aws:codewhisperer:us-east-1:..."
+#    proxy-url: "socks5://proxy.example.com:1080" # optional: proxy override
+
 # OpenAI compatibility providers
 # openai-compatibility:
 #   - name: "openrouter" # The name of the provider; it will be used in the user agent and other places.
@@ -206,22 +221,22 @@ nonstream-keepalive-interval: 0
 # Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow.
 # NOTE: Aliases do not apply to gemini-api-key, codex-api-key, claude-api-key, openai-compatibility, vertex-api-key, or ampcode.
 # You can repeat the same name with different aliases to expose multiple client model names.
-oauth-model-alias:
-  antigravity:
-    - name: "rev19-uic3-1p"
-      alias: "gemini-2.5-computer-use-preview-10-2025"
-    - name: "gemini-3-pro-image"
-      alias: "gemini-3-pro-image-preview"
-    - name: "gemini-3-pro-high"
-      alias: "gemini-3-pro-preview"
-    - name: "gemini-3-flash"
-      alias: "gemini-3-flash-preview"
-    - name: "claude-sonnet-4-5"
-      alias: "gemini-claude-sonnet-4-5"
-    - name: "claude-sonnet-4-5-thinking"
-      alias: "gemini-claude-sonnet-4-5-thinking"
-    - name: "claude-opus-4-5-thinking"
-      alias: "gemini-claude-opus-4-5-thinking"
+#oauth-model-alias:
+#  antigravity:
+#    - name: "rev19-uic3-1p"
+#      alias: "gemini-2.5-computer-use-preview-10-2025"
+#    - name: "gemini-3-pro-image"
+#      alias: "gemini-3-pro-image-preview"
+#    - name: "gemini-3-pro-high"
+#      alias: "gemini-3-pro-preview"
+#    - name: "gemini-3-flash"
+#      alias: "gemini-3-flash-preview"
+#    - name: "claude-sonnet-4-5"
+#      alias: "gemini-claude-sonnet-4-5"
+#    - name: "claude-sonnet-4-5-thinking"
+#      alias: "gemini-claude-sonnet-4-5-thinking"
+#    - name: "claude-opus-4-5-thinking"
+#      alias: "gemini-claude-opus-4-5-thinking"
 #   gemini-cli:
 #     - name: "gemini-2.5-pro"          # original model name under this channel
 #       alias: "g2.5p"                  # client-visible alias
@@ -232,6 +247,9 @@ oauth-model-alias:
 #   aistudio:
 #     - name: "gemini-2.5-pro"
 #       alias: "g2.5p"
+#   antigravity:
+#     - name: "gemini-3-pro-preview"
+#       alias: "g3p"
 #   claude:
 #     - name: "claude-sonnet-4-5-20250929"
 #       alias: "cs4.5"
@@ -244,8 +262,15 @@ oauth-model-alias:
 #   iflow:
 #     - name: "glm-4.7"
 #       alias: "glm-god"
+#   kiro:
+#     - name: "kiro-claude-opus-4-5"
+#       alias: "op45"
+#   github-copilot:
+#     - name: "gpt-5"
+#       alias: "copilot-gpt5"
 
 # OAuth provider excluded models
+# Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow, kiro, github-copilot.
 # oauth-excluded-models:
 #   gemini-cli:
 #     - "gemini-2.5-pro"     # exclude specific models (exact match)
@@ -266,6 +291,10 @@ oauth-model-alias:
 #     - "vision-model"
 #   iflow:
 #     - "tstars2.0"
+#   kiro:
+#     - "kiro-claude-haiku-4-5"
+#   github-copilot:
+#     - "raptor-mini"
 
 # Optional payload configuration
 # payload:

docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   cli-proxy-api:
-    image: ${CLI_PROXY_IMAGE:-eceasy/cli-proxy-api:latest}
+    image: ${CLI_PROXY_IMAGE:-eceasy/cli-proxy-api-plus:latest}
     pull_policy: always
     build:
       context: .
@@ -9,7 +9,7 @@ services:
         VERSION: ${VERSION:-dev}
         COMMIT: ${COMMIT:-none}
         BUILD_DATE: ${BUILD_DATE:-unknown}
-    container_name: cli-proxy-api
+    container_name: cli-proxy-api-plus
     # env_file:
     #   - .env
     environment:

go.mod

@@ -13,14 +13,15 @@ require (
 	github.com/joho/godotenv v1.5.1
 	github.com/klauspost/compress v1.17.4
 	github.com/minio/minio-go/v7 v7.0.66
+	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c
 	github.com/sirupsen/logrus v1.9.3
-	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966
 	github.com/tidwall/gjson v1.18.0
 	github.com/tidwall/sjson v1.2.5
 	github.com/tiktoken-go/tokenizer v0.7.0
 	golang.org/x/crypto v0.45.0
 	golang.org/x/net v0.47.0
 	golang.org/x/oauth2 v0.30.0
+	golang.org/x/term v0.37.0
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1
 	gopkg.in/yaml.v3 v3.0.1
 )

go.sum

@@ -116,6 +116,8 @@ github.com/pelletier/go-toml/v2 v2.2.2 h1:aYUidT7k73Pcl9nb2gScu7NSrKCSHIDE89b3+6
 github.com/pelletier/go-toml/v2 v2.2.2/go.mod h1:1t835xjRzz80PqgE6HHgN2JOsmgYu/h4qDAS4n929Rs=
 github.com/pjbgf/sha1cd v0.5.0 h1:a+UkboSi1znleCDUNT3M5YxjOnN1fz2FhN48FlwCxs0=
 github.com/pjbgf/sha1cd v0.5.0/go.mod h1:lhpGlyHLpQZoxMv8HcgXvZEhcGs0PG/vsZnEJ7H0iCM=
+github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c h1:+mdjkGKdHQG3305AYmdv1U2eRNDiU2ErMBj1gwrq8eQ=
+github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c/go.mod h1:7rwL4CYBLnjLxUqIJNnCWiEdr3bn6IUYi15bNlnbCCU=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
@@ -126,8 +128,6 @@ github.com/sergi/go-diff v1.4.0 h1:n/SP9D5ad1fORl+llWyN+D6qoUETXNZARKjyY2/KVCw=
 github.com/sergi/go-diff v1.4.0/go.mod h1:A0bzQcvG0E7Rwjx0REVgAGH58e96+X0MeOfepqsbeW4=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
 github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
-github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 h1:JIAuq3EEf9cgbU6AtGPK4CTG3Zf6CKMNqf0MHTggAUA=
-github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966/go.mod h1:sUM3LWHvSMaG192sy56D9F7CNvL7jUJVXoqM1QKLnog=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -169,6 +169,7 @@ golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKl
 golang.org/x/sync v0.18.0 h1:kr88TuHDroi+UVf+0hZnirlk8o8T+4MrK6mr60WkH/I=
 golang.org/x/sync v0.18.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
 golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=

internal/api/handlers/management/auth_files.go

@@ -3,6 +3,9 @@ package management
 import (
 	"bytes"
 	"context"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -23,6 +26,7 @@ import (
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/auth/codex"
 	geminiAuth "github.com/router-for-me/CLIProxyAPI/v6/internal/auth/gemini"
 	iflowauth "github.com/router-for-me/CLIProxyAPI/v6/internal/auth/iflow"
+	kiroauth "github.com/router-for-me/CLIProxyAPI/v6/internal/auth/kiro"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/auth/qwen"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/interfaces"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/misc"
@@ -2287,8 +2291,322 @@ func (h *Handler) GetAuthStatus(c *gin.Context) {
 		return
 	}
 	if status != "" {
+		if strings.HasPrefix(status, "device_code|") {
+			parts := strings.SplitN(status, "|", 3)
+			if len(parts) == 3 {
+				c.JSON(http.StatusOK, gin.H{
+					"status":           "device_code",
+					"verification_url": parts[1],
+					"user_code":        parts[2],
+				})
+				return
+			}
+		}
+		if strings.HasPrefix(status, "auth_url|") {
+			authURL := strings.TrimPrefix(status, "auth_url|")
+			c.JSON(http.StatusOK, gin.H{
+				"status": "auth_url",
+				"url":    authURL,
+			})
+			return
+		}
 		c.JSON(http.StatusOK, gin.H{"status": "error", "error": status})
 		return
 	}
 	c.JSON(http.StatusOK, gin.H{"status": "wait"})
 }
+
+const kiroCallbackPort = 9876
+
+func (h *Handler) RequestKiroToken(c *gin.Context) {
+	ctx := context.Background()
+
+	// Get the login method from query parameter (default: aws for device code flow)
+	method := strings.ToLower(strings.TrimSpace(c.Query("method")))
+	if method == "" {
+		method = "aws"
+	}
+
+	fmt.Println("Initializing Kiro authentication...")
+
+	state := fmt.Sprintf("kiro-%d", time.Now().UnixNano())
+
+	switch method {
+	case "aws", "builder-id":
+		RegisterOAuthSession(state, "kiro")
+
+		// AWS Builder ID uses device code flow (no callback needed)
+		go func() {
+			ssoClient := kiroauth.NewSSOOIDCClient(h.cfg)
+
+			// Step 1: Register client
+			fmt.Println("Registering client...")
+			regResp, errRegister := ssoClient.RegisterClient(ctx)
+			if errRegister != nil {
+				log.Errorf("Failed to register client: %v", errRegister)
+				SetOAuthSessionError(state, "Failed to register client")
+				return
+			}
+
+			// Step 2: Start device authorization
+			fmt.Println("Starting device authorization...")
+			authResp, errAuth := ssoClient.StartDeviceAuthorization(ctx, regResp.ClientID, regResp.ClientSecret)
+			if errAuth != nil {
+				log.Errorf("Failed to start device auth: %v", errAuth)
+				SetOAuthSessionError(state, "Failed to start device authorization")
+				return
+			}
+
+			// Store the verification URL for the frontend to display.
+			// Using "|" as separator because URLs contain ":".
+			SetOAuthSessionError(state, "device_code|"+authResp.VerificationURIComplete+"|"+authResp.UserCode)
+
+			// Step 3: Poll for token
+			fmt.Println("Waiting for authorization...")
+			interval := 5 * time.Second
+			if authResp.Interval > 0 {
+				interval = time.Duration(authResp.Interval) * time.Second
+			}
+			deadline := time.Now().Add(time.Duration(authResp.ExpiresIn) * time.Second)
+
+			for time.Now().Before(deadline) {
+				select {
+				case <-ctx.Done():
+					SetOAuthSessionError(state, "Authorization cancelled")
+					return
+				case <-time.After(interval):
+					tokenResp, errToken := ssoClient.CreateToken(ctx, regResp.ClientID, regResp.ClientSecret, authResp.DeviceCode)
+					if errToken != nil {
+						errStr := errToken.Error()
+						if strings.Contains(errStr, "authorization_pending") {
+							continue
+						}
+						if strings.Contains(errStr, "slow_down") {
+							interval += 5 * time.Second
+							continue
+						}
+						log.Errorf("Token creation failed: %v", errToken)
+						SetOAuthSessionError(state, "Token creation failed")
+						return
+					}
+
+					// Success! Save the token
+					expiresAt := time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
+					email := kiroauth.ExtractEmailFromJWT(tokenResp.AccessToken)
+
+					idPart := kiroauth.SanitizeEmailForFilename(email)
+					if idPart == "" {
+						idPart = fmt.Sprintf("%d", time.Now().UnixNano()%100000)
+					}
+
+					now := time.Now()
+					fileName := fmt.Sprintf("kiro-aws-%s.json", idPart)
+
+					record := &coreauth.Auth{
+						ID:       fileName,
+						Provider: "kiro",
+						FileName: fileName,
+						Metadata: map[string]any{
+							"type":          "kiro",
+							"access_token":  tokenResp.AccessToken,
+							"refresh_token": tokenResp.RefreshToken,
+							"expires_at":    expiresAt.Format(time.RFC3339),
+							"auth_method":   "builder-id",
+							"provider":      "AWS",
+							"client_id":     regResp.ClientID,
+							"client_secret": regResp.ClientSecret,
+							"email":         email,
+							"last_refresh":  now.Format(time.RFC3339),
+						},
+					}
+
+					savedPath, errSave := h.saveTokenRecord(ctx, record)
+					if errSave != nil {
+						log.Errorf("Failed to save authentication tokens: %v", errSave)
+						SetOAuthSessionError(state, "Failed to save authentication tokens")
+						return
+					}
+
+					fmt.Printf("Authentication successful! Token saved to %s\n", savedPath)
+					if email != "" {
+						fmt.Printf("Authenticated as: %s\n", email)
+					}
+					CompleteOAuthSession(state)
+					return
+				}
+			}
+
+			SetOAuthSessionError(state, "Authorization timed out")
+		}()
+
+		// Return immediately with the state for polling
+		c.JSON(http.StatusOK, gin.H{"status": "ok", "state": state, "method": "device_code"})
+
+	case "google", "github":
+		RegisterOAuthSession(state, "kiro")
+
+		// Social auth uses protocol handler - for WEB UI we use a callback forwarder
+		provider := "Google"
+		if method == "github" {
+			provider = "Github"
+		}
+
+		isWebUI := isWebUIRequest(c)
+		if isWebUI {
+			targetURL, errTarget := h.managementCallbackURL("/kiro/callback")
+			if errTarget != nil {
+				log.WithError(errTarget).Error("failed to compute kiro callback target")
+				c.JSON(http.StatusInternalServerError, gin.H{"error": "callback server unavailable"})
+				return
+			}
+			if _, errStart := startCallbackForwarder(kiroCallbackPort, "kiro", targetURL); errStart != nil {
+				log.WithError(errStart).Error("failed to start kiro callback forwarder")
+				c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to start callback server"})
+				return
+			}
+		}
+
+		go func() {
+			if isWebUI {
+				defer stopCallbackForwarder(kiroCallbackPort)
+			}
+
+			socialClient := kiroauth.NewSocialAuthClient(h.cfg)
+
+			// Generate PKCE codes
+			codeVerifier, codeChallenge, errPKCE := generateKiroPKCE()
+			if errPKCE != nil {
+				log.Errorf("Failed to generate PKCE: %v", errPKCE)
+				SetOAuthSessionError(state, "Failed to generate PKCE")
+				return
+			}
+
+			// Build login URL
+			authURL := fmt.Sprintf("%s/login?idp=%s&redirect_uri=%s&code_challenge=%s&code_challenge_method=S256&state=%s&prompt=select_account",
+				"https://prod.us-east-1.auth.desktop.kiro.dev",
+				provider,
+				url.QueryEscape(kiroauth.KiroRedirectURI),
+				codeChallenge,
+				state,
+			)
+
+			// Store auth URL for frontend.
+			// Using "|" as separator because URLs contain ":".
+			SetOAuthSessionError(state, "auth_url|"+authURL)
+
+			// Wait for callback file
+			waitFile := filepath.Join(h.cfg.AuthDir, fmt.Sprintf(".oauth-kiro-%s.oauth", state))
+			deadline := time.Now().Add(5 * time.Minute)
+
+			for {
+				if time.Now().After(deadline) {
+					log.Error("oauth flow timed out")
+					SetOAuthSessionError(state, "OAuth flow timed out")
+					return
+				}
+				if data, errRead := os.ReadFile(waitFile); errRead == nil {
+					var m map[string]string
+					_ = json.Unmarshal(data, &m)
+					_ = os.Remove(waitFile)
+					if errStr := m["error"]; errStr != "" {
+						log.Errorf("Authentication failed: %s", errStr)
+						SetOAuthSessionError(state, "Authentication failed")
+						return
+					}
+					if m["state"] != state {
+						log.Errorf("State mismatch")
+						SetOAuthSessionError(state, "State mismatch")
+						return
+					}
+					code := m["code"]
+					if code == "" {
+						log.Error("No authorization code received")
+						SetOAuthSessionError(state, "No authorization code received")
+						return
+					}
+
+					// Exchange code for tokens
+					tokenReq := &kiroauth.CreateTokenRequest{
+						Code:         code,
+						CodeVerifier: codeVerifier,
+						RedirectURI:  kiroauth.KiroRedirectURI,
+					}
+
+					tokenResp, errToken := socialClient.CreateToken(ctx, tokenReq)
+					if errToken != nil {
+						log.Errorf("Failed to exchange code for tokens: %v", errToken)
+						SetOAuthSessionError(state, "Failed to exchange code for tokens")
+						return
+					}
+
+					// Save the token
+					expiresIn := tokenResp.ExpiresIn
+					if expiresIn <= 0 {
+						expiresIn = 3600
+					}
+					expiresAt := time.Now().Add(time.Duration(expiresIn) * time.Second)
+					email := kiroauth.ExtractEmailFromJWT(tokenResp.AccessToken)
+
+					idPart := kiroauth.SanitizeEmailForFilename(email)
+					if idPart == "" {
+						idPart = fmt.Sprintf("%d", time.Now().UnixNano()%100000)
+					}
+
+					now := time.Now()
+					fileName := fmt.Sprintf("kiro-%s-%s.json", strings.ToLower(provider), idPart)
+
+					record := &coreauth.Auth{
+						ID:       fileName,
+						Provider: "kiro",
+						FileName: fileName,
+						Metadata: map[string]any{
+							"type":          "kiro",
+							"access_token":  tokenResp.AccessToken,
+							"refresh_token": tokenResp.RefreshToken,
+							"profile_arn":   tokenResp.ProfileArn,
+							"expires_at":    expiresAt.Format(time.RFC3339),
+							"auth_method":   "social",
+							"provider":      provider,
+							"email":         email,
+							"last_refresh":  now.Format(time.RFC3339),
+						},
+					}
+
+					savedPath, errSave := h.saveTokenRecord(ctx, record)
+					if errSave != nil {
+						log.Errorf("Failed to save authentication tokens: %v", errSave)
+						SetOAuthSessionError(state, "Failed to save authentication tokens")
+						return
+					}
+
+					fmt.Printf("Authentication successful! Token saved to %s\n", savedPath)
+					if email != "" {
+						fmt.Printf("Authenticated as: %s\n", email)
+					}
+					CompleteOAuthSession(state)
+					return
+				}
+				time.Sleep(500 * time.Millisecond)
+			}
+		}()
+
+		c.JSON(http.StatusOK, gin.H{"status": "ok", "state": state, "method": "social"})
+
+	default:
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid method, use 'aws', 'google', or 'github'"})
+	}
+}
+
+// generateKiroPKCE generates PKCE code verifier and challenge for Kiro OAuth.
+func generateKiroPKCE() (verifier, challenge string, err error) {
+	b := make([]byte, 32)
+	if _, errRead := io.ReadFull(rand.Reader, b); errRead != nil {
+		return "", "", fmt.Errorf("failed to generate random bytes: %w", errRead)
+	}
+	verifier = base64.RawURLEncoding.EncodeToString(b)
+
+	h := sha256.Sum256([]byte(verifier))
+	challenge = base64.RawURLEncoding.EncodeToString(h[:])
+
+	return verifier, challenge, nil
+}

internal/api/handlers/management/config_basic.go

@@ -19,8 +19,8 @@ import (
 )
 
 const (
-	latestReleaseURL       = "https://api.github.com/repos/router-for-me/CLIProxyAPI/releases/latest"
-	latestReleaseUserAgent = "CLIProxyAPI"
+	latestReleaseURL       = "https://api.github.com/repos/router-for-me/CLIProxyAPIPlus/releases/latest"
+	latestReleaseUserAgent = "CLIProxyAPIPlus"
 )
 
 func (h *Handler) GetConfig(c *gin.Context) {

internal/api/handlers/management/oauth_sessions.go

@@ -158,7 +158,12 @@ func (s *oauthSessionStore) IsPending(state, provider string) bool {
 		return false
 	}
 	if session.Status != "" {
-		return false
+		if !strings.EqualFold(session.Provider, "kiro") {
+			return false
+		}
+		if !strings.HasPrefix(session.Status, "device_code|") && !strings.HasPrefix(session.Status, "auth_url|") {
+			return false
+		}
 	}
 	if provider == "" {
 		return true
@@ -231,6 +236,8 @@ func NormalizeOAuthProvider(provider string) (string, error) {
 		return "antigravity", nil
 	case "qwen":
 		return "qwen", nil
+	case "kiro":
+		return "kiro", nil
 	default:
 		return "", errUnsupportedOAuthFlow
 	}

internal/api/modules/amp/proxy.go

@@ -3,8 +3,11 @@ package amp
 import (
 	"bytes"
 	"compress/gzip"
+	"context"
+	"errors"
 	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"net/http/httputil"
 	"net/url"
@@ -102,7 +105,15 @@ func createReverseProxy(upstreamURL string, secretSource SecretSource) (*httputi
 	// Modify incoming responses to handle gzip without Content-Encoding
 	// This addresses the same issue as inline handler gzip handling, but at the proxy level
 	proxy.ModifyResponse = func(resp *http.Response) error {
-		// Only process successful responses
+		// Log upstream error responses for diagnostics (502, 503, etc.)
+		// These are NOT proxy connection errors - the upstream responded with an error status
+		if resp.StatusCode >= 500 {
+			log.Errorf("amp upstream responded with error [%d] for %s %s", resp.StatusCode, resp.Request.Method, resp.Request.URL.Path)
+		} else if resp.StatusCode >= 400 {
+			log.Warnf("amp upstream responded with client error [%d] for %s %s", resp.StatusCode, resp.Request.Method, resp.Request.URL.Path)
+		}
+
+		// Only process successful responses for gzip decompression
 		if resp.StatusCode < 200 || resp.StatusCode >= 300 {
 			return nil
 		}
@@ -186,9 +197,29 @@ func createReverseProxy(upstreamURL string, secretSource SecretSource) (*httputi
 		return nil
 	}
 
-	// Error handler for proxy failures
+	// Error handler for proxy failures with detailed error classification for diagnostics
 	proxy.ErrorHandler = func(rw http.ResponseWriter, req *http.Request, err error) {
-		log.Errorf("amp upstream proxy error for %s %s: %v", req.Method, req.URL.Path, err)
+		// Classify the error type for better diagnostics
+		var errType string
+		if errors.Is(err, context.DeadlineExceeded) {
+			errType = "timeout"
+		} else if errors.Is(err, context.Canceled) {
+			errType = "canceled"
+		} else if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
+			errType = "dial_timeout"
+		} else if _, ok := err.(net.Error); ok {
+			errType = "network_error"
+		} else {
+			errType = "connection_error"
+		}
+
+		// Don't log as error for context canceled - it's usually client closing connection
+		if errors.Is(err, context.Canceled) {
+			log.Debugf("amp upstream proxy [%s]: client canceled request for %s %s", errType, req.Method, req.URL.Path)
+		} else {
+			log.Errorf("amp upstream proxy error [%s] for %s %s: %v", errType, req.Method, req.URL.Path, err)
+		}
+
 		rw.Header().Set("Content-Type", "application/json")
 		rw.WriteHeader(http.StatusBadGateway)
 		_, _ = rw.Write([]byte(`{"error":"amp_upstream_proxy_error","message":"Failed to reach Amp upstream"}`))

internal/api/modules/amp/response_rewriter.go

@@ -29,15 +29,71 @@ func NewResponseRewriter(w gin.ResponseWriter, originalModel string) *ResponseRe
 	}
 }
 
+const maxBufferedResponseBytes = 2 * 1024 * 1024 // 2MB safety cap
+
+func looksLikeSSEChunk(data []byte) bool {
+	// Fallback detection: some upstreams may omit/lie about Content-Type, causing SSE to be buffered.
+	// Heuristics are intentionally simple and cheap.
+	return bytes.Contains(data, []byte("data:")) ||
+		bytes.Contains(data, []byte("event:")) ||
+		bytes.Contains(data, []byte("message_start")) ||
+		bytes.Contains(data, []byte("message_delta")) ||
+		bytes.Contains(data, []byte("content_block_start")) ||
+		bytes.Contains(data, []byte("content_block_delta")) ||
+		bytes.Contains(data, []byte("content_block_stop")) ||
+		bytes.Contains(data, []byte("\n\n"))
+}
+
+func (rw *ResponseRewriter) enableStreaming(reason string) error {
+	if rw.isStreaming {
+		return nil
+	}
+	rw.isStreaming = true
+
+	// Flush any previously buffered data to avoid reordering or data loss.
+	if rw.body != nil && rw.body.Len() > 0 {
+		buf := rw.body.Bytes()
+		// Copy before Reset() to keep bytes stable.
+		toFlush := make([]byte, len(buf))
+		copy(toFlush, buf)
+		rw.body.Reset()
+
+		if _, err := rw.ResponseWriter.Write(rw.rewriteStreamChunk(toFlush)); err != nil {
+			return err
+		}
+		if flusher, ok := rw.ResponseWriter.(http.Flusher); ok {
+			flusher.Flush()
+		}
+	}
+
+	log.Debugf("amp response rewriter: switched to streaming (%s)", reason)
+	return nil
+}
+
 // Write intercepts response writes and buffers them for model name replacement
 func (rw *ResponseRewriter) Write(data []byte) (int, error) {
-	// Detect streaming on first write
-	if rw.body.Len() == 0 && !rw.isStreaming {
+	// Detect streaming on first write (header-based)
+	if !rw.isStreaming && rw.body.Len() == 0 {
 		contentType := rw.Header().Get("Content-Type")
 		rw.isStreaming = strings.Contains(contentType, "text/event-stream") ||
 			strings.Contains(contentType, "stream")
 	}
 
+	if !rw.isStreaming {
+		// Content-based fallback: detect SSE-like chunks even if Content-Type is missing/wrong.
+		if looksLikeSSEChunk(data) {
+			if err := rw.enableStreaming("sse heuristic"); err != nil {
+				return 0, err
+			}
+		} else if rw.body.Len()+len(data) > maxBufferedResponseBytes {
+			// Safety cap: avoid unbounded buffering on large responses.
+			log.Warnf("amp response rewriter: buffer exceeded %d bytes, switching to streaming", maxBufferedResponseBytes)
+			if err := rw.enableStreaming("buffer limit"); err != nil {
+				return 0, err
+			}
+		}
+	}
+
 	if rw.isStreaming {
 		n, err := rw.ResponseWriter.Write(rw.rewriteStreamChunk(data))
 		if err == nil {

internal/api/server.go

@@ -348,6 +348,12 @@ func (s *Server) setupRoutes() {
 			},
 		})
 	})
+
+	// Event logging endpoint - handles Claude Code telemetry requests
+	// Returns 200 OK to prevent 404 errors in logs
+	s.engine.POST("/api/event_logging/batch", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{"status": "ok"})
+	})
 	s.engine.POST("/v1internal:method", geminiCLIHandlers.CLIHandler)
 
 	// OAuth callback endpoints (reuse main server port)
@@ -423,6 +429,20 @@ func (s *Server) setupRoutes() {
 		c.String(http.StatusOK, oauthCallbackSuccessHTML)
 	})
 
+	s.engine.GET("/kiro/callback", func(c *gin.Context) {
+		code := c.Query("code")
+		state := c.Query("state")
+		errStr := c.Query("error")
+		if errStr == "" {
+			errStr = c.Query("error_description")
+		}
+		if state != "" {
+			_, _ = managementHandlers.WriteOAuthCallbackFileForPendingSession(s.cfg.AuthDir, "kiro", state, code, errStr)
+		}
+		c.Header("Content-Type", "text/html; charset=utf-8")
+		c.String(http.StatusOK, oauthCallbackSuccessHTML)
+	})
+
 	// Management routes are registered lazily by registerManagementRoutes when a secret is configured.
 }
 
@@ -620,6 +640,7 @@ func (s *Server) registerManagementRoutes() {
 		mgmt.GET("/qwen-auth-url", s.mgmt.RequestQwenToken)
 		mgmt.GET("/iflow-auth-url", s.mgmt.RequestIFlowToken)
 		mgmt.POST("/iflow-auth-url", s.mgmt.RequestIFlowCookieToken)
+		mgmt.GET("/kiro-auth-url", s.mgmt.RequestKiroToken)
 		mgmt.POST("/oauth-callback", s.mgmt.PostOAuthCallback)
 		mgmt.GET("/get-auth-status", s.mgmt.GetAuthStatus)
 	}

internal/auth/claude/oauth_server.go

@@ -242,6 +242,11 @@ func (s *OAuthServer) handleSuccess(w http.ResponseWriter, r *http.Request) {
 		platformURL = "https://console.anthropic.com/"
 	}
 
+	// Validate platformURL to prevent XSS - only allow http/https URLs
+	if !isValidURL(platformURL) {
+		platformURL = "https://console.anthropic.com/"
+	}
+
 	// Generate success page HTML with dynamic content
 	successHTML := s.generateSuccessHTML(setupRequired, platformURL)
 
@@ -251,6 +256,12 @@ func (s *OAuthServer) handleSuccess(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// isValidURL checks if the URL is a valid http/https URL to prevent XSS
+func isValidURL(urlStr string) bool {
+	urlStr = strings.TrimSpace(urlStr)
+	return strings.HasPrefix(urlStr, "https://") || strings.HasPrefix(urlStr, "http://")
+}
+
 // generateSuccessHTML creates the HTML content for the success page.
 // It customizes the page based on whether additional setup is required
 // and includes a link to the platform.

internal/auth/codex/oauth_server.go

@@ -239,6 +239,11 @@ func (s *OAuthServer) handleSuccess(w http.ResponseWriter, r *http.Request) {
 		platformURL = "https://platform.openai.com"
 	}
 
+	// Validate platformURL to prevent XSS - only allow http/https URLs
+	if !isValidURL(platformURL) {
+		platformURL = "https://platform.openai.com"
+	}
+
 	// Generate success page HTML with dynamic content
 	successHTML := s.generateSuccessHTML(setupRequired, platformURL)
 
@@ -248,6 +253,12 @@ func (s *OAuthServer) handleSuccess(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// isValidURL checks if the URL is a valid http/https URL to prevent XSS
+func isValidURL(urlStr string) bool {
+	urlStr = strings.TrimSpace(urlStr)
+	return strings.HasPrefix(urlStr, "https://") || strings.HasPrefix(urlStr, "http://")
+}
+
 // generateSuccessHTML creates the HTML content for the success page.
 // It customizes the page based on whether additional setup is required
 // and includes a link to the platform.

internal/auth/copilot/copilot_auth.go

@@ -0,0 +1,225 @@
+// Package copilot provides authentication and token management for GitHub Copilot API.
+// It handles the OAuth2 device flow for secure authentication with the Copilot API.
+package copilot
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	// copilotAPITokenURL is the endpoint for getting Copilot API tokens from GitHub token.
+	copilotAPITokenURL = "https://api.github.com/copilot_internal/v2/token"
+	// copilotAPIEndpoint is the base URL for making API requests.
+	copilotAPIEndpoint = "https://api.githubcopilot.com"
+
+	// Common HTTP header values for Copilot API requests.
+	copilotUserAgent       = "GithubCopilot/1.0"
+	copilotEditorVersion   = "vscode/1.100.0"
+	copilotPluginVersion   = "copilot/1.300.0"
+	copilotIntegrationID   = "vscode-chat"
+	copilotOpenAIIntent    = "conversation-panel"
+)
+
+// CopilotAPIToken represents the Copilot API token response.
+type CopilotAPIToken struct {
+	// Token is the JWT token for authenticating with the Copilot API.
+	Token string `json:"token"`
+	// ExpiresAt is the Unix timestamp when the token expires.
+	ExpiresAt int64 `json:"expires_at"`
+	// Endpoints contains the available API endpoints.
+	Endpoints struct {
+		API           string `json:"api"`
+		Proxy         string `json:"proxy"`
+		OriginTracker string `json:"origin-tracker"`
+		Telemetry     string `json:"telemetry"`
+	} `json:"endpoints,omitempty"`
+	// ErrorDetails contains error information if the request failed.
+	ErrorDetails *struct {
+		URL              string `json:"url"`
+		Message          string `json:"message"`
+		DocumentationURL string `json:"documentation_url"`
+	} `json:"error_details,omitempty"`
+}
+
+// CopilotAuth handles GitHub Copilot authentication flow.
+// It provides methods for device flow authentication and token management.
+type CopilotAuth struct {
+	httpClient   *http.Client
+	deviceClient *DeviceFlowClient
+	cfg          *config.Config
+}
+
+// NewCopilotAuth creates a new CopilotAuth service instance.
+// It initializes an HTTP client with proxy settings from the provided configuration.
+func NewCopilotAuth(cfg *config.Config) *CopilotAuth {
+	return &CopilotAuth{
+		httpClient:   util.SetProxy(&cfg.SDKConfig, &http.Client{Timeout: 30 * time.Second}),
+		deviceClient: NewDeviceFlowClient(cfg),
+		cfg:          cfg,
+	}
+}
+
+// StartDeviceFlow initiates the device flow authentication.
+// Returns the device code response containing the user code and verification URI.
+func (c *CopilotAuth) StartDeviceFlow(ctx context.Context) (*DeviceCodeResponse, error) {
+	return c.deviceClient.RequestDeviceCode(ctx)
+}
+
+// WaitForAuthorization polls for user authorization and returns the auth bundle.
+func (c *CopilotAuth) WaitForAuthorization(ctx context.Context, deviceCode *DeviceCodeResponse) (*CopilotAuthBundle, error) {
+	tokenData, err := c.deviceClient.PollForToken(ctx, deviceCode)
+	if err != nil {
+		return nil, err
+	}
+
+	// Fetch the GitHub username
+	username, err := c.deviceClient.FetchUserInfo(ctx, tokenData.AccessToken)
+	if err != nil {
+		log.Warnf("copilot: failed to fetch user info: %v", err)
+		username = "unknown"
+	}
+
+	return &CopilotAuthBundle{
+		TokenData: tokenData,
+		Username:  username,
+	}, nil
+}
+
+// GetCopilotAPIToken exchanges a GitHub access token for a Copilot API token.
+// This token is used to make authenticated requests to the Copilot API.
+func (c *CopilotAuth) GetCopilotAPIToken(ctx context.Context, githubAccessToken string) (*CopilotAPIToken, error) {
+	if githubAccessToken == "" {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, fmt.Errorf("github access token is empty"))
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, copilotAPITokenURL, nil)
+	if err != nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, err)
+	}
+
+	req.Header.Set("Authorization", "token "+githubAccessToken)
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("User-Agent", copilotUserAgent)
+	req.Header.Set("Editor-Version", copilotEditorVersion)
+	req.Header.Set("Editor-Plugin-Version", copilotPluginVersion)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, err)
+	}
+	defer func() {
+		if errClose := resp.Body.Close(); errClose != nil {
+			log.Errorf("copilot api token: close body error: %v", errClose)
+		}
+	}()
+
+	bodyBytes, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, err)
+	}
+
+	if !isHTTPSuccess(resp.StatusCode) {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed,
+			fmt.Errorf("status %d: %s", resp.StatusCode, string(bodyBytes)))
+	}
+
+	var apiToken CopilotAPIToken
+	if err = json.Unmarshal(bodyBytes, &apiToken); err != nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, err)
+	}
+
+	if apiToken.Token == "" {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, fmt.Errorf("empty copilot api token"))
+	}
+
+	return &apiToken, nil
+}
+
+// ValidateToken checks if a GitHub access token is valid by attempting to fetch user info.
+func (c *CopilotAuth) ValidateToken(ctx context.Context, accessToken string) (bool, string, error) {
+	if accessToken == "" {
+		return false, "", nil
+	}
+
+	username, err := c.deviceClient.FetchUserInfo(ctx, accessToken)
+	if err != nil {
+		return false, "", err
+	}
+
+	return true, username, nil
+}
+
+// CreateTokenStorage creates a new CopilotTokenStorage from auth bundle.
+func (c *CopilotAuth) CreateTokenStorage(bundle *CopilotAuthBundle) *CopilotTokenStorage {
+	return &CopilotTokenStorage{
+		AccessToken: bundle.TokenData.AccessToken,
+		TokenType:   bundle.TokenData.TokenType,
+		Scope:       bundle.TokenData.Scope,
+		Username:    bundle.Username,
+		Type:        "github-copilot",
+	}
+}
+
+// LoadAndValidateToken loads a token from storage and validates it.
+// Returns the storage if valid, or an error if the token is invalid or expired.
+func (c *CopilotAuth) LoadAndValidateToken(ctx context.Context, storage *CopilotTokenStorage) (bool, error) {
+	if storage == nil || storage.AccessToken == "" {
+		return false, fmt.Errorf("no token available")
+	}
+
+	// Check if we can still use the GitHub token to get a Copilot API token
+	apiToken, err := c.GetCopilotAPIToken(ctx, storage.AccessToken)
+	if err != nil {
+		return false, err
+	}
+
+	// Check if the API token is expired
+	if apiToken.ExpiresAt > 0 && time.Now().Unix() >= apiToken.ExpiresAt {
+		return false, fmt.Errorf("copilot api token expired")
+	}
+
+	return true, nil
+}
+
+// GetAPIEndpoint returns the Copilot API endpoint URL.
+func (c *CopilotAuth) GetAPIEndpoint() string {
+	return copilotAPIEndpoint
+}
+
+// MakeAuthenticatedRequest creates an authenticated HTTP request to the Copilot API.
+func (c *CopilotAuth) MakeAuthenticatedRequest(ctx context.Context, method, url string, body io.Reader, apiToken *CopilotAPIToken) (*http.Request, error) {
+	req, err := http.NewRequestWithContext(ctx, method, url, body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Authorization", "Bearer "+apiToken.Token)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("User-Agent", copilotUserAgent)
+	req.Header.Set("Editor-Version", copilotEditorVersion)
+	req.Header.Set("Editor-Plugin-Version", copilotPluginVersion)
+	req.Header.Set("Openai-Intent", copilotOpenAIIntent)
+	req.Header.Set("Copilot-Integration-Id", copilotIntegrationID)
+
+	return req, nil
+}
+
+// buildChatCompletionURL builds the URL for chat completions API.
+func buildChatCompletionURL() string {
+	return copilotAPIEndpoint + "/chat/completions"
+}
+
+// isHTTPSuccess checks if the status code indicates success (2xx).
+func isHTTPSuccess(statusCode int) bool {
+	return statusCode >= 200 && statusCode < 300
+}

internal/auth/copilot/errors.go

@@ -0,0 +1,187 @@
+package copilot
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+)
+
+// OAuthError represents an OAuth-specific error.
+type OAuthError struct {
+	// Code is the OAuth error code.
+	Code string `json:"error"`
+	// Description is a human-readable description of the error.
+	Description string `json:"error_description,omitempty"`
+	// URI is a URI identifying a human-readable web page with information about the error.
+	URI string `json:"error_uri,omitempty"`
+	// StatusCode is the HTTP status code associated with the error.
+	StatusCode int `json:"-"`
+}
+
+// Error returns a string representation of the OAuth error.
+func (e *OAuthError) Error() string {
+	if e.Description != "" {
+		return fmt.Sprintf("OAuth error %s: %s", e.Code, e.Description)
+	}
+	return fmt.Sprintf("OAuth error: %s", e.Code)
+}
+
+// NewOAuthError creates a new OAuth error with the specified code, description, and status code.
+func NewOAuthError(code, description string, statusCode int) *OAuthError {
+	return &OAuthError{
+		Code:        code,
+		Description: description,
+		StatusCode:  statusCode,
+	}
+}
+
+// AuthenticationError represents authentication-related errors.
+type AuthenticationError struct {
+	// Type is the type of authentication error.
+	Type string `json:"type"`
+	// Message is a human-readable message describing the error.
+	Message string `json:"message"`
+	// Code is the HTTP status code associated with the error.
+	Code int `json:"code"`
+	// Cause is the underlying error that caused this authentication error.
+	Cause error `json:"-"`
+}
+
+// Error returns a string representation of the authentication error.
+func (e *AuthenticationError) Error() string {
+	if e.Cause != nil {
+		return fmt.Sprintf("%s: %s (caused by: %v)", e.Type, e.Message, e.Cause)
+	}
+	return fmt.Sprintf("%s: %s", e.Type, e.Message)
+}
+
+// Unwrap returns the underlying cause of the error.
+func (e *AuthenticationError) Unwrap() error {
+	return e.Cause
+}
+
+// Common authentication error types for GitHub Copilot device flow.
+var (
+	// ErrDeviceCodeFailed represents an error when requesting the device code fails.
+	ErrDeviceCodeFailed = &AuthenticationError{
+		Type:    "device_code_failed",
+		Message: "Failed to request device code from GitHub",
+		Code:    http.StatusBadRequest,
+	}
+
+	// ErrDeviceCodeExpired represents an error when the device code has expired.
+	ErrDeviceCodeExpired = &AuthenticationError{
+		Type:    "device_code_expired",
+		Message: "Device code has expired. Please try again.",
+		Code:    http.StatusGone,
+	}
+
+	// ErrAuthorizationPending represents a pending authorization state (not an error, used for polling).
+	ErrAuthorizationPending = &AuthenticationError{
+		Type:    "authorization_pending",
+		Message: "Authorization is pending. Waiting for user to authorize.",
+		Code:    http.StatusAccepted,
+	}
+
+	// ErrSlowDown represents a request to slow down polling.
+	ErrSlowDown = &AuthenticationError{
+		Type:    "slow_down",
+		Message: "Polling too frequently. Slowing down.",
+		Code:    http.StatusTooManyRequests,
+	}
+
+	// ErrAccessDenied represents an error when the user denies authorization.
+	ErrAccessDenied = &AuthenticationError{
+		Type:    "access_denied",
+		Message: "User denied authorization",
+		Code:    http.StatusForbidden,
+	}
+
+	// ErrTokenExchangeFailed represents an error when token exchange fails.
+	ErrTokenExchangeFailed = &AuthenticationError{
+		Type:    "token_exchange_failed",
+		Message: "Failed to exchange device code for access token",
+		Code:    http.StatusBadRequest,
+	}
+
+	// ErrPollingTimeout represents an error when polling times out.
+	ErrPollingTimeout = &AuthenticationError{
+		Type:    "polling_timeout",
+		Message: "Timeout waiting for user authorization",
+		Code:    http.StatusRequestTimeout,
+	}
+
+	// ErrUserInfoFailed represents an error when fetching user info fails.
+	ErrUserInfoFailed = &AuthenticationError{
+		Type:    "user_info_failed",
+		Message: "Failed to fetch GitHub user information",
+		Code:    http.StatusBadRequest,
+	}
+)
+
+// NewAuthenticationError creates a new authentication error with a cause based on a base error.
+func NewAuthenticationError(baseErr *AuthenticationError, cause error) *AuthenticationError {
+	return &AuthenticationError{
+		Type:    baseErr.Type,
+		Message: baseErr.Message,
+		Code:    baseErr.Code,
+		Cause:   cause,
+	}
+}
+
+// IsAuthenticationError checks if an error is an authentication error.
+func IsAuthenticationError(err error) bool {
+	var authenticationError *AuthenticationError
+	ok := errors.As(err, &authenticationError)
+	return ok
+}
+
+// IsOAuthError checks if an error is an OAuth error.
+func IsOAuthError(err error) bool {
+	var oAuthError *OAuthError
+	ok := errors.As(err, &oAuthError)
+	return ok
+}
+
+// GetUserFriendlyMessage returns a user-friendly error message based on the error type.
+func GetUserFriendlyMessage(err error) string {
+	var authErr *AuthenticationError
+	if errors.As(err, &authErr) {
+		switch authErr.Type {
+		case "device_code_failed":
+			return "Failed to start GitHub authentication. Please check your network connection and try again."
+		case "device_code_expired":
+			return "The authentication code has expired. Please try again."
+		case "authorization_pending":
+			return "Waiting for you to authorize the application on GitHub."
+		case "slow_down":
+			return "Please wait a moment before trying again."
+		case "access_denied":
+			return "Authentication was cancelled or denied."
+		case "token_exchange_failed":
+			return "Failed to complete authentication. Please try again."
+		case "polling_timeout":
+			return "Authentication timed out. Please try again."
+		case "user_info_failed":
+			return "Failed to get your GitHub account information. Please try again."
+		default:
+			return "Authentication failed. Please try again."
+		}
+	}
+
+	var oauthErr *OAuthError
+	if errors.As(err, &oauthErr) {
+		switch oauthErr.Code {
+		case "access_denied":
+			return "Authentication was cancelled or denied."
+		case "invalid_request":
+			return "Invalid authentication request. Please try again."
+		case "server_error":
+			return "GitHub server error. Please try again later."
+		default:
+			return fmt.Sprintf("Authentication failed: %s", oauthErr.Description)
+		}
+	}
+
+	return "An unexpected error occurred. Please try again."
+}

internal/auth/copilot/oauth.go

@@ -0,0 +1,255 @@
+package copilot
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	// copilotClientID is GitHub's Copilot CLI OAuth client ID.
+	copilotClientID = "Iv1.b507a08c87ecfe98"
+	// copilotDeviceCodeURL is the endpoint for requesting device codes.
+	copilotDeviceCodeURL = "https://github.com/login/device/code"
+	// copilotTokenURL is the endpoint for exchanging device codes for tokens.
+	copilotTokenURL = "https://github.com/login/oauth/access_token"
+	// copilotUserInfoURL is the endpoint for fetching GitHub user information.
+	copilotUserInfoURL = "https://api.github.com/user"
+	// defaultPollInterval is the default interval for polling token endpoint.
+	defaultPollInterval = 5 * time.Second
+	// maxPollDuration is the maximum time to wait for user authorization.
+	maxPollDuration = 15 * time.Minute
+)
+
+// DeviceFlowClient handles the OAuth2 device flow for GitHub Copilot.
+type DeviceFlowClient struct {
+	httpClient *http.Client
+	cfg        *config.Config
+}
+
+// NewDeviceFlowClient creates a new device flow client.
+func NewDeviceFlowClient(cfg *config.Config) *DeviceFlowClient {
+	client := &http.Client{Timeout: 30 * time.Second}
+	if cfg != nil {
+		client = util.SetProxy(&cfg.SDKConfig, client)
+	}
+	return &DeviceFlowClient{
+		httpClient: client,
+		cfg:        cfg,
+	}
+}
+
+// RequestDeviceCode initiates the device flow by requesting a device code from GitHub.
+func (c *DeviceFlowClient) RequestDeviceCode(ctx context.Context) (*DeviceCodeResponse, error) {
+	data := url.Values{}
+	data.Set("client_id", copilotClientID)
+	data.Set("scope", "user:email")
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, copilotDeviceCodeURL, strings.NewReader(data.Encode()))
+	if err != nil {
+		return nil, NewAuthenticationError(ErrDeviceCodeFailed, err)
+	}
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, NewAuthenticationError(ErrDeviceCodeFailed, err)
+	}
+	defer func() {
+		if errClose := resp.Body.Close(); errClose != nil {
+			log.Errorf("copilot device code: close body error: %v", errClose)
+		}
+	}()
+
+	if !isHTTPSuccess(resp.StatusCode) {
+		bodyBytes, _ := io.ReadAll(resp.Body)
+		return nil, NewAuthenticationError(ErrDeviceCodeFailed, fmt.Errorf("status %d: %s", resp.StatusCode, string(bodyBytes)))
+	}
+
+	var deviceCode DeviceCodeResponse
+	if err = json.NewDecoder(resp.Body).Decode(&deviceCode); err != nil {
+		return nil, NewAuthenticationError(ErrDeviceCodeFailed, err)
+	}
+
+	return &deviceCode, nil
+}
+
+// PollForToken polls the token endpoint until the user authorizes or the device code expires.
+func (c *DeviceFlowClient) PollForToken(ctx context.Context, deviceCode *DeviceCodeResponse) (*CopilotTokenData, error) {
+	if deviceCode == nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, fmt.Errorf("device code is nil"))
+	}
+
+	interval := time.Duration(deviceCode.Interval) * time.Second
+	if interval < defaultPollInterval {
+		interval = defaultPollInterval
+	}
+
+	deadline := time.Now().Add(maxPollDuration)
+	if deviceCode.ExpiresIn > 0 {
+		codeDeadline := time.Now().Add(time.Duration(deviceCode.ExpiresIn) * time.Second)
+		if codeDeadline.Before(deadline) {
+			deadline = codeDeadline
+		}
+	}
+
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return nil, NewAuthenticationError(ErrPollingTimeout, ctx.Err())
+		case <-ticker.C:
+			if time.Now().After(deadline) {
+				return nil, ErrPollingTimeout
+			}
+
+			token, err := c.exchangeDeviceCode(ctx, deviceCode.DeviceCode)
+			if err != nil {
+				var authErr *AuthenticationError
+				if errors.As(err, &authErr) {
+					switch authErr.Type {
+					case ErrAuthorizationPending.Type:
+						// Continue polling
+						continue
+					case ErrSlowDown.Type:
+						// Increase interval and continue
+						interval += 5 * time.Second
+						ticker.Reset(interval)
+						continue
+					case ErrDeviceCodeExpired.Type:
+						return nil, err
+					case ErrAccessDenied.Type:
+						return nil, err
+					}
+				}
+				return nil, err
+			}
+			return token, nil
+		}
+	}
+}
+
+// exchangeDeviceCode attempts to exchange the device code for an access token.
+func (c *DeviceFlowClient) exchangeDeviceCode(ctx context.Context, deviceCode string) (*CopilotTokenData, error) {
+	data := url.Values{}
+	data.Set("client_id", copilotClientID)
+	data.Set("device_code", deviceCode)
+	data.Set("grant_type", "urn:ietf:params:oauth:grant-type:device_code")
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, copilotTokenURL, strings.NewReader(data.Encode()))
+	if err != nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, err)
+	}
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, err)
+	}
+	defer func() {
+		if errClose := resp.Body.Close(); errClose != nil {
+			log.Errorf("copilot token exchange: close body error: %v", errClose)
+		}
+	}()
+
+	bodyBytes, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, err)
+	}
+
+	// GitHub returns 200 for both success and error cases in device flow
+	// Check for OAuth error response first
+	var oauthResp struct {
+		Error            string `json:"error"`
+		ErrorDescription string `json:"error_description"`
+		AccessToken      string `json:"access_token"`
+		TokenType        string `json:"token_type"`
+		Scope            string `json:"scope"`
+	}
+
+	if err = json.Unmarshal(bodyBytes, &oauthResp); err != nil {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, err)
+	}
+
+	if oauthResp.Error != "" {
+		switch oauthResp.Error {
+		case "authorization_pending":
+			return nil, ErrAuthorizationPending
+		case "slow_down":
+			return nil, ErrSlowDown
+		case "expired_token":
+			return nil, ErrDeviceCodeExpired
+		case "access_denied":
+			return nil, ErrAccessDenied
+		default:
+			return nil, NewOAuthError(oauthResp.Error, oauthResp.ErrorDescription, resp.StatusCode)
+		}
+	}
+
+	if oauthResp.AccessToken == "" {
+		return nil, NewAuthenticationError(ErrTokenExchangeFailed, fmt.Errorf("empty access token"))
+	}
+
+	return &CopilotTokenData{
+		AccessToken: oauthResp.AccessToken,
+		TokenType:   oauthResp.TokenType,
+		Scope:       oauthResp.Scope,
+	}, nil
+}
+
+// FetchUserInfo retrieves the GitHub username for the authenticated user.
+func (c *DeviceFlowClient) FetchUserInfo(ctx context.Context, accessToken string) (string, error) {
+	if accessToken == "" {
+		return "", NewAuthenticationError(ErrUserInfoFailed, fmt.Errorf("access token is empty"))
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, copilotUserInfoURL, nil)
+	if err != nil {
+		return "", NewAuthenticationError(ErrUserInfoFailed, err)
+	}
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("User-Agent", "CLIProxyAPI")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return "", NewAuthenticationError(ErrUserInfoFailed, err)
+	}
+	defer func() {
+		if errClose := resp.Body.Close(); errClose != nil {
+			log.Errorf("copilot user info: close body error: %v", errClose)
+		}
+	}()
+
+	if !isHTTPSuccess(resp.StatusCode) {
+		bodyBytes, _ := io.ReadAll(resp.Body)
+		return "", NewAuthenticationError(ErrUserInfoFailed, fmt.Errorf("status %d: %s", resp.StatusCode, string(bodyBytes)))
+	}
+
+	var userInfo struct {
+		Login string `json:"login"`
+	}
+	if err = json.NewDecoder(resp.Body).Decode(&userInfo); err != nil {
+		return "", NewAuthenticationError(ErrUserInfoFailed, err)
+	}
+
+	if userInfo.Login == "" {
+		return "", NewAuthenticationError(ErrUserInfoFailed, fmt.Errorf("empty username"))
+	}
+
+	return userInfo.Login, nil
+}

internal/auth/copilot/token.go

@@ -0,0 +1,93 @@
+// Package copilot provides authentication and token management functionality
+// for GitHub Copilot AI services. It handles OAuth2 device flow token storage,
+// serialization, and retrieval for maintaining authenticated sessions with the Copilot API.
+package copilot
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/misc"
+)
+
+// CopilotTokenStorage stores OAuth2 token information for GitHub Copilot API authentication.
+// It maintains compatibility with the existing auth system while adding Copilot-specific fields
+// for managing access tokens and user account information.
+type CopilotTokenStorage struct {
+	// AccessToken is the OAuth2 access token used for authenticating API requests.
+	AccessToken string `json:"access_token"`
+	// TokenType is the type of token, typically "bearer".
+	TokenType string `json:"token_type"`
+	// Scope is the OAuth2 scope granted to the token.
+	Scope string `json:"scope"`
+	// ExpiresAt is the timestamp when the access token expires (if provided).
+	ExpiresAt string `json:"expires_at,omitempty"`
+	// Username is the GitHub username associated with this token.
+	Username string `json:"username"`
+	// Type indicates the authentication provider type, always "github-copilot" for this storage.
+	Type string `json:"type"`
+}
+
+// CopilotTokenData holds the raw OAuth token response from GitHub.
+type CopilotTokenData struct {
+	// AccessToken is the OAuth2 access token.
+	AccessToken string `json:"access_token"`
+	// TokenType is the type of token, typically "bearer".
+	TokenType string `json:"token_type"`
+	// Scope is the OAuth2 scope granted to the token.
+	Scope string `json:"scope"`
+}
+
+// CopilotAuthBundle bundles authentication data for storage.
+type CopilotAuthBundle struct {
+	// TokenData contains the OAuth token information.
+	TokenData *CopilotTokenData
+	// Username is the GitHub username.
+	Username string
+}
+
+// DeviceCodeResponse represents GitHub's device code response.
+type DeviceCodeResponse struct {
+	// DeviceCode is the device verification code.
+	DeviceCode string `json:"device_code"`
+	// UserCode is the code the user must enter at the verification URI.
+	UserCode string `json:"user_code"`
+	// VerificationURI is the URL where the user should enter the code.
+	VerificationURI string `json:"verification_uri"`
+	// ExpiresIn is the number of seconds until the device code expires.
+	ExpiresIn int `json:"expires_in"`
+	// Interval is the minimum number of seconds to wait between polling requests.
+	Interval int `json:"interval"`
+}
+
+// SaveTokenToFile serializes the Copilot token storage to a JSON file.
+// This method creates the necessary directory structure and writes the token
+// data in JSON format to the specified file path for persistent storage.
+//
+// Parameters:
+//   - authFilePath: The full path where the token file should be saved
+//
+// Returns:
+//   - error: An error if the operation fails, nil otherwise
+func (ts *CopilotTokenStorage) SaveTokenToFile(authFilePath string) error {
+	misc.LogSavingCredentials(authFilePath)
+	ts.Type = "github-copilot"
+	if err := os.MkdirAll(filepath.Dir(authFilePath), 0700); err != nil {
+		return fmt.Errorf("failed to create directory: %v", err)
+	}
+
+	f, err := os.Create(authFilePath)
+	if err != nil {
+		return fmt.Errorf("failed to create token file: %w", err)
+	}
+	defer func() {
+		_ = f.Close()
+	}()
+
+	if err = json.NewEncoder(f).Encode(ts); err != nil {
+		return fmt.Errorf("failed to write token to file: %w", err)
+	}
+	return nil
+}

internal/auth/iflow/iflow_auth.go

@@ -9,6 +9,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"os"
 	"strings"
 	"time"
 
@@ -28,10 +29,21 @@ const (
 	iFlowAPIKeyEndpoint = "https://platform.iflow.cn/api/openapi/apikey"
 
 	// Client credentials provided by iFlow for the Code Assist integration.
-	iFlowOAuthClientID     = "10009311001"
-	iFlowOAuthClientSecret = "4Z3YjXycVsQvyGF1etiNlIBB4RsqSDtW"
+	iFlowOAuthClientID = "10009311001"
+	// Default client secret (can be overridden via IFLOW_CLIENT_SECRET env var)
+	defaultIFlowClientSecret = "4Z3YjXycVsQvyGF1etiNlIBB4RsqSDtW"
 )
 
+// getIFlowClientSecret returns the iFlow OAuth client secret.
+// It first checks the IFLOW_CLIENT_SECRET environment variable,
+// falling back to the default value if not set.
+func getIFlowClientSecret() string {
+	if secret := os.Getenv("IFLOW_CLIENT_SECRET"); secret != "" {
+		return secret
+	}
+	return defaultIFlowClientSecret
+}
+
 // DefaultAPIBaseURL is the canonical chat completions endpoint.
 const DefaultAPIBaseURL = "https://apis.iflow.cn/v1"
 
@@ -72,7 +84,7 @@ func (ia *IFlowAuth) ExchangeCodeForTokens(ctx context.Context, code, redirectUR
 	form.Set("code", code)
 	form.Set("redirect_uri", redirectURI)
 	form.Set("client_id", iFlowOAuthClientID)
-	form.Set("client_secret", iFlowOAuthClientSecret)
+	form.Set("client_secret", getIFlowClientSecret())
 
 	req, err := ia.newTokenRequest(ctx, form)
 	if err != nil {
@@ -88,7 +100,7 @@ func (ia *IFlowAuth) RefreshTokens(ctx context.Context, refreshToken string) (*I
 	form.Set("grant_type", "refresh_token")
 	form.Set("refresh_token", refreshToken)
 	form.Set("client_id", iFlowOAuthClientID)
-	form.Set("client_secret", iFlowOAuthClientSecret)
+	form.Set("client_secret", getIFlowClientSecret())
 
 	req, err := ia.newTokenRequest(ctx, form)
 	if err != nil {
@@ -104,7 +116,7 @@ func (ia *IFlowAuth) newTokenRequest(ctx context.Context, form url.Values) (*htt
 		return nil, fmt.Errorf("iflow token: create request failed: %w", err)
 	}
 
-	basic := base64.StdEncoding.EncodeToString([]byte(iFlowOAuthClientID + ":" + iFlowOAuthClientSecret))
+	basic := base64.StdEncoding.EncodeToString([]byte(iFlowOAuthClientID + ":" + getIFlowClientSecret()))
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 	req.Header.Set("Accept", "application/json")
 	req.Header.Set("Authorization", "Basic "+basic)

internal/auth/kiro/aws.go

@@ -0,0 +1,305 @@
+// Package kiro provides authentication functionality for AWS CodeWhisperer (Kiro) API.
+// It includes interfaces and implementations for token storage and authentication methods.
+package kiro
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// PKCECodes holds PKCE verification codes for OAuth2 PKCE flow
+type PKCECodes struct {
+	// CodeVerifier is the cryptographically random string used to correlate
+	// the authorization request to the token request
+	CodeVerifier string `json:"code_verifier"`
+	// CodeChallenge is the SHA256 hash of the code verifier, base64url-encoded
+	CodeChallenge string `json:"code_challenge"`
+}
+
+// KiroTokenData holds OAuth token information from AWS CodeWhisperer (Kiro)
+type KiroTokenData struct {
+	// AccessToken is the OAuth2 access token for API access
+	AccessToken string `json:"accessToken"`
+	// RefreshToken is used to obtain new access tokens
+	RefreshToken string `json:"refreshToken"`
+	// ProfileArn is the AWS CodeWhisperer profile ARN
+	ProfileArn string `json:"profileArn"`
+	// ExpiresAt is the timestamp when the token expires
+	ExpiresAt string `json:"expiresAt"`
+	// AuthMethod indicates the authentication method used (e.g., "builder-id", "social")
+	AuthMethod string `json:"authMethod"`
+	// Provider indicates the OAuth provider (e.g., "AWS", "Google")
+	Provider string `json:"provider"`
+	// ClientID is the OIDC client ID (needed for token refresh)
+	ClientID string `json:"clientId,omitempty"`
+	// ClientSecret is the OIDC client secret (needed for token refresh)
+	ClientSecret string `json:"clientSecret,omitempty"`
+	// Email is the user's email address (used for file naming)
+	Email string `json:"email,omitempty"`
+	// StartURL is the IDC/Identity Center start URL (only for IDC auth method)
+	StartURL string `json:"startUrl,omitempty"`
+	// Region is the AWS region for IDC authentication (only for IDC auth method)
+	Region string `json:"region,omitempty"`
+}
+
+// KiroAuthBundle aggregates authentication data after OAuth flow completion
+type KiroAuthBundle struct {
+	// TokenData contains the OAuth tokens from the authentication flow
+	TokenData KiroTokenData `json:"token_data"`
+	// LastRefresh is the timestamp of the last token refresh
+	LastRefresh string `json:"last_refresh"`
+}
+
+// KiroUsageInfo represents usage information from CodeWhisperer API
+type KiroUsageInfo struct {
+	// SubscriptionTitle is the subscription plan name (e.g., "KIRO FREE")
+	SubscriptionTitle string `json:"subscription_title"`
+	// CurrentUsage is the current credit usage
+	CurrentUsage float64 `json:"current_usage"`
+	// UsageLimit is the maximum credit limit
+	UsageLimit float64 `json:"usage_limit"`
+	// NextReset is the timestamp of the next usage reset
+	NextReset string `json:"next_reset"`
+}
+
+// KiroModel represents a model available through the CodeWhisperer API
+type KiroModel struct {
+	// ModelID is the unique identifier for the model
+	ModelID string `json:"modelId"`
+	// ModelName is the human-readable name
+	ModelName string `json:"modelName"`
+	// Description is the model description
+	Description string `json:"description"`
+	// RateMultiplier is the credit multiplier for this model
+	RateMultiplier float64 `json:"rateMultiplier"`
+	// RateUnit is the unit for rate calculation (e.g., "credit")
+	RateUnit string `json:"rateUnit"`
+	// MaxInputTokens is the maximum input token limit
+	MaxInputTokens int `json:"maxInputTokens,omitempty"`
+}
+
+// KiroIDETokenFile is the default path to Kiro IDE's token file
+const KiroIDETokenFile = ".aws/sso/cache/kiro-auth-token.json"
+
+// LoadKiroIDEToken loads token data from Kiro IDE's token file.
+func LoadKiroIDEToken() (*KiroTokenData, error) {
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get home directory: %w", err)
+	}
+
+	tokenPath := filepath.Join(homeDir, KiroIDETokenFile)
+	data, err := os.ReadFile(tokenPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read Kiro IDE token file (%s): %w", tokenPath, err)
+	}
+
+	var token KiroTokenData
+	if err := json.Unmarshal(data, &token); err != nil {
+		return nil, fmt.Errorf("failed to parse Kiro IDE token: %w", err)
+	}
+
+	if token.AccessToken == "" {
+		return nil, fmt.Errorf("access token is empty in Kiro IDE token file")
+	}
+
+	return &token, nil
+}
+
+// LoadKiroTokenFromPath loads token data from a custom path.
+// This supports multiple accounts by allowing different token files.
+func LoadKiroTokenFromPath(tokenPath string) (*KiroTokenData, error) {
+	// Expand ~ to home directory
+	if len(tokenPath) > 0 && tokenPath[0] == '~' {
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			return nil, fmt.Errorf("failed to get home directory: %w", err)
+		}
+		tokenPath = filepath.Join(homeDir, tokenPath[1:])
+	}
+
+	data, err := os.ReadFile(tokenPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read token file (%s): %w", tokenPath, err)
+	}
+
+	var token KiroTokenData
+	if err := json.Unmarshal(data, &token); err != nil {
+		return nil, fmt.Errorf("failed to parse token file: %w", err)
+	}
+
+	if token.AccessToken == "" {
+		return nil, fmt.Errorf("access token is empty in token file")
+	}
+
+	return &token, nil
+}
+
+// ListKiroTokenFiles lists all Kiro token files in the cache directory.
+// This supports multiple accounts by finding all token files.
+func ListKiroTokenFiles() ([]string, error) {
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get home directory: %w", err)
+	}
+
+	cacheDir := filepath.Join(homeDir, ".aws", "sso", "cache")
+	
+	// Check if directory exists
+	if _, err := os.Stat(cacheDir); os.IsNotExist(err) {
+		return nil, nil // No token files
+	}
+
+	entries, err := os.ReadDir(cacheDir)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read cache directory: %w", err)
+	}
+
+	var tokenFiles []string
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		name := entry.Name()
+		// Look for kiro token files only (avoid matching unrelated AWS SSO cache files)
+		if strings.HasSuffix(name, ".json") && strings.HasPrefix(name, "kiro") {
+			tokenFiles = append(tokenFiles, filepath.Join(cacheDir, name))
+		}
+	}
+
+	return tokenFiles, nil
+}
+
+// LoadAllKiroTokens loads all Kiro tokens from the cache directory.
+// This supports multiple accounts.
+func LoadAllKiroTokens() ([]*KiroTokenData, error) {
+	files, err := ListKiroTokenFiles()
+	if err != nil {
+		return nil, err
+	}
+
+	var tokens []*KiroTokenData
+	for _, file := range files {
+		token, err := LoadKiroTokenFromPath(file)
+		if err != nil {
+			// Skip invalid token files
+			continue
+		}
+		tokens = append(tokens, token)
+	}
+
+	return tokens, nil
+}
+
+// JWTClaims represents the claims we care about from a JWT token.
+// JWT tokens from Kiro/AWS contain user information in the payload.
+type JWTClaims struct {
+	Email         string `json:"email,omitempty"`
+	Sub           string `json:"sub,omitempty"`
+	PreferredUser string `json:"preferred_username,omitempty"`
+	Name          string `json:"name,omitempty"`
+	Iss           string `json:"iss,omitempty"`
+}
+
+// ExtractEmailFromJWT extracts the user's email from a JWT access token.
+// JWT tokens typically have format: header.payload.signature
+// The payload is base64url-encoded JSON containing user claims.
+func ExtractEmailFromJWT(accessToken string) string {
+	if accessToken == "" {
+		return ""
+	}
+
+	// JWT format: header.payload.signature
+	parts := strings.Split(accessToken, ".")
+	if len(parts) != 3 {
+		return ""
+	}
+
+	// Decode the payload (second part)
+	payload := parts[1]
+
+	// Add padding if needed (base64url requires padding)
+	switch len(payload) % 4 {
+	case 2:
+		payload += "=="
+	case 3:
+		payload += "="
+	}
+
+	decoded, err := base64.URLEncoding.DecodeString(payload)
+	if err != nil {
+		// Try RawURLEncoding (no padding)
+		decoded, err = base64.RawURLEncoding.DecodeString(parts[1])
+		if err != nil {
+			return ""
+		}
+	}
+
+	var claims JWTClaims
+	if err := json.Unmarshal(decoded, &claims); err != nil {
+		return ""
+	}
+
+	// Return email if available
+	if claims.Email != "" {
+		return claims.Email
+	}
+
+	// Fallback to preferred_username (some providers use this)
+	if claims.PreferredUser != "" && strings.Contains(claims.PreferredUser, "@") {
+		return claims.PreferredUser
+	}
+
+	// Fallback to sub if it looks like an email
+	if claims.Sub != "" && strings.Contains(claims.Sub, "@") {
+		return claims.Sub
+	}
+
+	return ""
+}
+
+// SanitizeEmailForFilename sanitizes an email address for use in a filename.
+// Replaces special characters with underscores and prevents path traversal attacks.
+// Also handles URL-encoded characters to prevent encoded path traversal attempts.
+func SanitizeEmailForFilename(email string) string {
+	if email == "" {
+		return ""
+	}
+
+	result := email
+	
+	// First, handle URL-encoded path traversal attempts (%2F, %2E, %5C, etc.)
+	// This prevents encoded characters from bypassing the sanitization.
+	// Note: We replace % last to catch any remaining encodings including double-encoding (%252F)
+	result = strings.ReplaceAll(result, "%2F", "_") // /
+	result = strings.ReplaceAll(result, "%2f", "_")
+	result = strings.ReplaceAll(result, "%5C", "_") // \
+	result = strings.ReplaceAll(result, "%5c", "_")
+	result = strings.ReplaceAll(result, "%2E", "_") // .
+	result = strings.ReplaceAll(result, "%2e", "_")
+	result = strings.ReplaceAll(result, "%00", "_") // null byte
+	result = strings.ReplaceAll(result, "%", "_")   // Catch remaining % to prevent double-encoding attacks
+
+	// Replace characters that are problematic in filenames
+	// Keep @ and . in middle but replace other special characters
+	for _, char := range []string{"/", "\\", ":", "*", "?", "\"", "<", ">", "|", " ", "\x00"} {
+		result = strings.ReplaceAll(result, char, "_")
+	}
+	
+	// Prevent path traversal: replace leading dots in each path component
+	// This handles cases like "../../../etc/passwd" → "_.._.._.._etc_passwd"
+	parts := strings.Split(result, "_")
+	for i, part := range parts {
+		for strings.HasPrefix(part, ".") {
+			part = "_" + part[1:]
+		}
+		parts[i] = part
+	}
+	result = strings.Join(parts, "_")
+	
+	return result
+}

internal/auth/kiro/aws_auth.go

@@ -0,0 +1,314 @@
+// Package kiro provides OAuth2 authentication functionality for AWS CodeWhisperer (Kiro) API.
+// This package implements token loading, refresh, and API communication with CodeWhisperer.
+package kiro
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	// awsKiroEndpoint is used for CodeWhisperer management APIs (GetUsageLimits, ListProfiles, etc.)
+	// Note: This is different from the Amazon Q streaming endpoint (q.us-east-1.amazonaws.com)
+	// used in kiro_executor.go for GenerateAssistantResponse. Both endpoints are correct
+	// for their respective API operations.
+	awsKiroEndpoint     = "https://codewhisperer.us-east-1.amazonaws.com"
+	defaultTokenFile    = "~/.aws/sso/cache/kiro-auth-token.json"
+	targetGetUsage      = "AmazonCodeWhispererService.GetUsageLimits"
+	targetListModels    = "AmazonCodeWhispererService.ListAvailableModels"
+	targetGenerateChat  = "AmazonCodeWhispererStreamingService.GenerateAssistantResponse"
+)
+
+// KiroAuth handles AWS CodeWhisperer authentication and API communication.
+// It provides methods for loading tokens, refreshing expired tokens,
+// and communicating with the CodeWhisperer API.
+type KiroAuth struct {
+	httpClient *http.Client
+	endpoint   string
+}
+
+// NewKiroAuth creates a new Kiro authentication service.
+// It initializes the HTTP client with proxy settings from the configuration.
+//
+// Parameters:
+//   - cfg: The application configuration containing proxy settings
+//
+// Returns:
+//   - *KiroAuth: A new Kiro authentication service instance
+func NewKiroAuth(cfg *config.Config) *KiroAuth {
+	return &KiroAuth{
+		httpClient: util.SetProxy(&cfg.SDKConfig, &http.Client{Timeout: 120 * time.Second}),
+		endpoint:   awsKiroEndpoint,
+	}
+}
+
+// LoadTokenFromFile loads token data from a file path.
+// This method reads and parses the token file, expanding ~ to the home directory.
+//
+// Parameters:
+//   - tokenFile: Path to the token file (supports ~ expansion)
+//
+// Returns:
+//   - *KiroTokenData: The parsed token data
+//   - error: An error if file reading or parsing fails
+func (k *KiroAuth) LoadTokenFromFile(tokenFile string) (*KiroTokenData, error) {
+	// Expand ~ to home directory
+	if strings.HasPrefix(tokenFile, "~") {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return nil, fmt.Errorf("failed to get home directory: %w", err)
+		}
+		tokenFile = filepath.Join(home, tokenFile[1:])
+	}
+
+	data, err := os.ReadFile(tokenFile)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read token file: %w", err)
+	}
+
+	var tokenData KiroTokenData
+	if err := json.Unmarshal(data, &tokenData); err != nil {
+		return nil, fmt.Errorf("failed to parse token file: %w", err)
+	}
+
+	return &tokenData, nil
+}
+
+// IsTokenExpired checks if the token has expired.
+// This method parses the expiration timestamp and compares it with the current time.
+//
+// Parameters:
+//   - tokenData: The token data to check
+//
+// Returns:
+//   - bool: True if the token has expired, false otherwise
+func (k *KiroAuth) IsTokenExpired(tokenData *KiroTokenData) bool {
+	if tokenData.ExpiresAt == "" {
+		return true
+	}
+
+	expiresAt, err := time.Parse(time.RFC3339, tokenData.ExpiresAt)
+	if err != nil {
+		// Try alternate format
+		expiresAt, err = time.Parse("2006-01-02T15:04:05.000Z", tokenData.ExpiresAt)
+		if err != nil {
+			return true
+		}
+	}
+
+	return time.Now().After(expiresAt)
+}
+
+// makeRequest sends a request to the CodeWhisperer API.
+// This is an internal method for making authenticated API calls.
+//
+// Parameters:
+//   - ctx: The context for the request
+//   - target: The API target (e.g., "AmazonCodeWhispererService.GetUsageLimits")
+//   - accessToken: The OAuth access token
+//   - payload: The request payload
+//
+// Returns:
+//   - []byte: The response body
+//   - error: An error if the request fails
+func (k *KiroAuth) makeRequest(ctx context.Context, target string, accessToken string, payload interface{}) ([]byte, error) {
+	jsonBody, err := json.Marshal(payload)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal request: %w", err)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, k.endpoint, strings.NewReader(string(jsonBody)))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/x-amz-json-1.0")
+	req.Header.Set("x-amz-target", target)
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := k.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("request failed: %w", err)
+	}
+	defer func() {
+		if errClose := resp.Body.Close(); errClose != nil {
+			log.Errorf("failed to close response body: %v", errClose)
+		}
+	}()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("API error (status %d): %s", resp.StatusCode, string(body))
+	}
+
+	return body, nil
+}
+
+// GetUsageLimits retrieves usage information from the CodeWhisperer API.
+// This method fetches the current usage statistics and subscription information.
+//
+// Parameters:
+//   - ctx: The context for the request
+//   - tokenData: The token data containing access token and profile ARN
+//
+// Returns:
+//   - *KiroUsageInfo: The usage information
+//   - error: An error if the request fails
+func (k *KiroAuth) GetUsageLimits(ctx context.Context, tokenData *KiroTokenData) (*KiroUsageInfo, error) {
+	payload := map[string]interface{}{
+		"origin":       "AI_EDITOR",
+		"profileArn":   tokenData.ProfileArn,
+		"resourceType": "AGENTIC_REQUEST",
+	}
+
+	body, err := k.makeRequest(ctx, targetGetUsage, tokenData.AccessToken, payload)
+	if err != nil {
+		return nil, err
+	}
+
+	var result struct {
+		SubscriptionInfo struct {
+			SubscriptionTitle string `json:"subscriptionTitle"`
+		} `json:"subscriptionInfo"`
+		UsageBreakdownList []struct {
+			CurrentUsageWithPrecision float64 `json:"currentUsageWithPrecision"`
+			UsageLimitWithPrecision   float64 `json:"usageLimitWithPrecision"`
+		} `json:"usageBreakdownList"`
+		NextDateReset float64 `json:"nextDateReset"`
+	}
+
+	if err := json.Unmarshal(body, &result); err != nil {
+		return nil, fmt.Errorf("failed to parse usage response: %w", err)
+	}
+
+	usage := &KiroUsageInfo{
+		SubscriptionTitle: result.SubscriptionInfo.SubscriptionTitle,
+		NextReset:         fmt.Sprintf("%v", result.NextDateReset),
+	}
+
+	if len(result.UsageBreakdownList) > 0 {
+		usage.CurrentUsage = result.UsageBreakdownList[0].CurrentUsageWithPrecision
+		usage.UsageLimit = result.UsageBreakdownList[0].UsageLimitWithPrecision
+	}
+
+	return usage, nil
+}
+
+// ListAvailableModels retrieves available models from the CodeWhisperer API.
+// This method fetches the list of AI models available for the authenticated user.
+//
+// Parameters:
+//   - ctx: The context for the request
+//   - tokenData: The token data containing access token and profile ARN
+//
+// Returns:
+//   - []*KiroModel: The list of available models
+//   - error: An error if the request fails
+func (k *KiroAuth) ListAvailableModels(ctx context.Context, tokenData *KiroTokenData) ([]*KiroModel, error) {
+	payload := map[string]interface{}{
+		"origin":     "AI_EDITOR",
+		"profileArn": tokenData.ProfileArn,
+	}
+
+	body, err := k.makeRequest(ctx, targetListModels, tokenData.AccessToken, payload)
+	if err != nil {
+		return nil, err
+	}
+
+	var result struct {
+		Models []struct {
+			ModelID        string  `json:"modelId"`
+			ModelName      string  `json:"modelName"`
+			Description    string  `json:"description"`
+			RateMultiplier float64 `json:"rateMultiplier"`
+			RateUnit       string  `json:"rateUnit"`
+			TokenLimits    struct {
+				MaxInputTokens int `json:"maxInputTokens"`
+			} `json:"tokenLimits"`
+		} `json:"models"`
+	}
+
+	if err := json.Unmarshal(body, &result); err != nil {
+		return nil, fmt.Errorf("failed to parse models response: %w", err)
+	}
+
+	models := make([]*KiroModel, 0, len(result.Models))
+	for _, m := range result.Models {
+		models = append(models, &KiroModel{
+			ModelID:        m.ModelID,
+			ModelName:      m.ModelName,
+			Description:    m.Description,
+			RateMultiplier: m.RateMultiplier,
+			RateUnit:       m.RateUnit,
+			MaxInputTokens: m.TokenLimits.MaxInputTokens,
+		})
+	}
+
+	return models, nil
+}
+
+// CreateTokenStorage creates a new KiroTokenStorage from token data.
+// This method converts the token data into a storage structure suitable for persistence.
+//
+// Parameters:
+//   - tokenData: The token data to convert
+//
+// Returns:
+//   - *KiroTokenStorage: A new token storage instance
+func (k *KiroAuth) CreateTokenStorage(tokenData *KiroTokenData) *KiroTokenStorage {
+	return &KiroTokenStorage{
+		AccessToken:  tokenData.AccessToken,
+		RefreshToken: tokenData.RefreshToken,
+		ProfileArn:   tokenData.ProfileArn,
+		ExpiresAt:    tokenData.ExpiresAt,
+		AuthMethod:   tokenData.AuthMethod,
+		Provider:     tokenData.Provider,
+		LastRefresh:  time.Now().Format(time.RFC3339),
+	}
+}
+
+// ValidateToken checks if the token is valid by making a test API call.
+// This method verifies the token by attempting to fetch usage limits.
+//
+// Parameters:
+//   - ctx: The context for the request
+//   - tokenData: The token data to validate
+//
+// Returns:
+//   - error: An error if the token is invalid
+func (k *KiroAuth) ValidateToken(ctx context.Context, tokenData *KiroTokenData) error {
+	_, err := k.GetUsageLimits(ctx, tokenData)
+	return err
+}
+
+// UpdateTokenStorage updates an existing token storage with new token data.
+// This method refreshes the token storage with newly obtained access and refresh tokens.
+//
+// Parameters:
+//   - storage: The existing token storage to update
+//   - tokenData: The new token data to apply
+func (k *KiroAuth) UpdateTokenStorage(storage *KiroTokenStorage, tokenData *KiroTokenData) {
+	storage.AccessToken = tokenData.AccessToken
+	storage.RefreshToken = tokenData.RefreshToken
+	storage.ProfileArn = tokenData.ProfileArn
+	storage.ExpiresAt = tokenData.ExpiresAt
+	storage.AuthMethod = tokenData.AuthMethod
+	storage.Provider = tokenData.Provider
+	storage.LastRefresh = time.Now().Format(time.RFC3339)
+}

internal/auth/kiro/aws_test.go

@@ -0,0 +1,161 @@
+package kiro
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"testing"
+)
+
+func TestExtractEmailFromJWT(t *testing.T) {
+	tests := []struct {
+		name     string
+		token    string
+		expected string
+	}{
+		{
+			name:     "Empty token",
+			token:    "",
+			expected: "",
+		},
+		{
+			name:     "Invalid token format",
+			token:    "not.a.valid.jwt",
+			expected: "",
+		},
+		{
+			name:     "Invalid token - not base64",
+			token:    "xxx.yyy.zzz",
+			expected: "",
+		},
+		{
+			name:     "Valid JWT with email",
+			token:    createTestJWT(map[string]any{"email": "test@example.com", "sub": "user123"}),
+			expected: "test@example.com",
+		},
+		{
+			name:     "JWT without email but with preferred_username",
+			token:    createTestJWT(map[string]any{"preferred_username": "user@domain.com", "sub": "user123"}),
+			expected: "user@domain.com",
+		},
+		{
+			name:     "JWT with email-like sub",
+			token:    createTestJWT(map[string]any{"sub": "another@test.com"}),
+			expected: "another@test.com",
+		},
+		{
+			name:     "JWT without any email fields",
+			token:    createTestJWT(map[string]any{"sub": "user123", "name": "Test User"}),
+			expected: "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := ExtractEmailFromJWT(tt.token)
+			if result != tt.expected {
+				t.Errorf("ExtractEmailFromJWT() = %q, want %q", result, tt.expected)
+			}
+		})
+	}
+}
+
+func TestSanitizeEmailForFilename(t *testing.T) {
+	tests := []struct {
+		name     string
+		email    string
+		expected string
+	}{
+		{
+			name:     "Empty email",
+			email:    "",
+			expected: "",
+		},
+		{
+			name:     "Simple email",
+			email:    "user@example.com",
+			expected: "user@example.com",
+		},
+		{
+			name:     "Email with space",
+			email:    "user name@example.com",
+			expected: "user_name@example.com",
+		},
+		{
+			name:     "Email with special chars",
+			email:    "user:name@example.com",
+			expected: "user_name@example.com",
+		},
+		{
+			name:     "Email with multiple special chars",
+			email:    "user/name:test@example.com",
+			expected: "user_name_test@example.com",
+		},
+		{
+			name:     "Path traversal attempt",
+			email:    "../../../etc/passwd",
+			expected: "_.__.__._etc_passwd",
+		},
+		{
+			name:     "Path traversal with backslash",
+			email:    `..\..\..\..\windows\system32`,
+			expected: "_.__.__.__._windows_system32",
+		},
+		{
+			name:     "Null byte injection attempt",
+			email:    "user\x00@evil.com",
+			expected: "user_@evil.com",
+		},
+		// URL-encoded path traversal tests
+		{
+			name:     "URL-encoded slash",
+			email:    "user%2Fpath@example.com",
+			expected: "user_path@example.com",
+		},
+		{
+			name:     "URL-encoded backslash",
+			email:    "user%5Cpath@example.com",
+			expected: "user_path@example.com",
+		},
+		{
+			name:     "URL-encoded dot",
+			email:    "%2E%2E%2Fetc%2Fpasswd",
+			expected: "___etc_passwd",
+		},
+		{
+			name:     "URL-encoded null",
+			email:    "user%00@evil.com",
+			expected: "user_@evil.com",
+		},
+		{
+			name:     "Double URL-encoding attack",
+			email:    "%252F%252E%252E",
+			expected: "_252F_252E_252E", // % replaced with _, remaining chars preserved (safe)
+		},
+		{
+			name:     "Mixed case URL-encoding",
+			email:    "%2f%2F%5c%5C",
+			expected: "____",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := SanitizeEmailForFilename(tt.email)
+			if result != tt.expected {
+				t.Errorf("SanitizeEmailForFilename() = %q, want %q", result, tt.expected)
+			}
+		})
+	}
+}
+
+// createTestJWT creates a test JWT token with the given claims
+func createTestJWT(claims map[string]any) string {
+	header := base64.RawURLEncoding.EncodeToString([]byte(`{"alg":"RS256","typ":"JWT"}`))
+	
+	payloadBytes, _ := json.Marshal(claims)
+	payload := base64.RawURLEncoding.EncodeToString(payloadBytes)
+	
+	signature := base64.RawURLEncoding.EncodeToString([]byte("fake-signature"))
+	
+	return header + "." + payload + "." + signature
+}

internal/auth/kiro/codewhisperer_client.go

@@ -0,0 +1,166 @@
+// Package kiro provides CodeWhisperer API client for fetching user info.
+package kiro
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	codeWhispererAPI = "https://codewhisperer.us-east-1.amazonaws.com"
+	kiroVersion      = "0.6.18"
+)
+
+// CodeWhispererClient handles CodeWhisperer API calls.
+type CodeWhispererClient struct {
+	httpClient *http.Client
+	machineID  string
+}
+
+// UsageLimitsResponse represents the getUsageLimits API response.
+type UsageLimitsResponse struct {
+	DaysUntilReset     *int                `json:"daysUntilReset,omitempty"`
+	NextDateReset      *float64            `json:"nextDateReset,omitempty"`
+	UserInfo           *UserInfo           `json:"userInfo,omitempty"`
+	SubscriptionInfo   *SubscriptionInfo   `json:"subscriptionInfo,omitempty"`
+	UsageBreakdownList []UsageBreakdown    `json:"usageBreakdownList,omitempty"`
+}
+
+// UserInfo contains user information from the API.
+type UserInfo struct {
+	Email  string `json:"email,omitempty"`
+	UserID string `json:"userId,omitempty"`
+}
+
+// SubscriptionInfo contains subscription details.
+type SubscriptionInfo struct {
+	SubscriptionTitle string `json:"subscriptionTitle,omitempty"`
+	Type              string `json:"type,omitempty"`
+}
+
+// UsageBreakdown contains usage details.
+type UsageBreakdown struct {
+	UsageLimit                 *int     `json:"usageLimit,omitempty"`
+	CurrentUsage               *int     `json:"currentUsage,omitempty"`
+	UsageLimitWithPrecision    *float64 `json:"usageLimitWithPrecision,omitempty"`
+	CurrentUsageWithPrecision  *float64 `json:"currentUsageWithPrecision,omitempty"`
+	NextDateReset              *float64 `json:"nextDateReset,omitempty"`
+	DisplayName                string   `json:"displayName,omitempty"`
+	ResourceType               string   `json:"resourceType,omitempty"`
+}
+
+// NewCodeWhispererClient creates a new CodeWhisperer client.
+func NewCodeWhispererClient(cfg *config.Config, machineID string) *CodeWhispererClient {
+	client := &http.Client{Timeout: 30 * time.Second}
+	if cfg != nil {
+		client = util.SetProxy(&cfg.SDKConfig, client)
+	}
+	if machineID == "" {
+		machineID = uuid.New().String()
+	}
+	return &CodeWhispererClient{
+		httpClient: client,
+		machineID:  machineID,
+	}
+}
+
+// generateInvocationID generates a unique invocation ID.
+func generateInvocationID() string {
+	return uuid.New().String()
+}
+
+// GetUsageLimits fetches usage limits and user info from CodeWhisperer API.
+// This is the recommended way to get user email after login.
+func (c *CodeWhispererClient) GetUsageLimits(ctx context.Context, accessToken string) (*UsageLimitsResponse, error) {
+	url := fmt.Sprintf("%s/getUsageLimits?isEmailRequired=true&origin=AI_EDITOR&resourceType=AGENTIC_REQUEST", codeWhispererAPI)
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	// Set headers to match Kiro IDE
+	xAmzUserAgent := fmt.Sprintf("aws-sdk-js/1.0.0 KiroIDE-%s-%s", kiroVersion, c.machineID)
+	userAgent := fmt.Sprintf("aws-sdk-js/1.0.0 ua/2.1 os/windows lang/js md/nodejs#20.16.0 api/codewhispererruntime#1.0.0 m/E KiroIDE-%s-%s", kiroVersion, c.machineID)
+
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	req.Header.Set("x-amz-user-agent", xAmzUserAgent)
+	req.Header.Set("User-Agent", userAgent)
+	req.Header.Set("amz-sdk-invocation-id", generateInvocationID())
+	req.Header.Set("amz-sdk-request", "attempt=1; max=1")
+	req.Header.Set("Connection", "close")
+
+	log.Debugf("codewhisperer: GET %s", url)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response: %w", err)
+	}
+
+	log.Debugf("codewhisperer: status=%d, body=%s", resp.StatusCode, string(body))
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("API returned status %d: %s", resp.StatusCode, string(body))
+	}
+
+	var result UsageLimitsResponse
+	if err := json.Unmarshal(body, &result); err != nil {
+		return nil, fmt.Errorf("failed to parse response: %w", err)
+	}
+
+	return &result, nil
+}
+
+// FetchUserEmailFromAPI fetches user email using CodeWhisperer getUsageLimits API.
+// This is more reliable than JWT parsing as it uses the official API.
+func (c *CodeWhispererClient) FetchUserEmailFromAPI(ctx context.Context, accessToken string) string {
+	resp, err := c.GetUsageLimits(ctx, accessToken)
+	if err != nil {
+		log.Debugf("codewhisperer: failed to get usage limits: %v", err)
+		return ""
+	}
+
+	if resp.UserInfo != nil && resp.UserInfo.Email != "" {
+		log.Debugf("codewhisperer: got email from API: %s", resp.UserInfo.Email)
+		return resp.UserInfo.Email
+	}
+
+	log.Debugf("codewhisperer: no email in response")
+	return ""
+}
+
+// FetchUserEmailWithFallback fetches user email with multiple fallback methods.
+// Priority: 1. CodeWhisperer API  2. userinfo endpoint  3. JWT parsing
+func FetchUserEmailWithFallback(ctx context.Context, cfg *config.Config, accessToken string) string {
+	// Method 1: Try CodeWhisperer API (most reliable)
+	cwClient := NewCodeWhispererClient(cfg, "")
+	email := cwClient.FetchUserEmailFromAPI(ctx, accessToken)
+	if email != "" {
+		return email
+	}
+
+	// Method 2: Try SSO OIDC userinfo endpoint
+	ssoClient := NewSSOOIDCClient(cfg)
+	email = ssoClient.FetchUserEmail(ctx, accessToken)
+	if email != "" {
+		return email
+	}
+
+	// Method 3: Fallback to JWT parsing
+	return ExtractEmailFromJWT(accessToken)
+}

internal/auth/kiro/oauth.go

@@ -0,0 +1,303 @@
+// Package kiro provides OAuth2 authentication for Kiro using native Google login.
+package kiro
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"html"
+	"io"
+	"net"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	// Kiro auth endpoint
+	kiroAuthEndpoint = "https://prod.us-east-1.auth.desktop.kiro.dev"
+	
+	// Default callback port
+	defaultCallbackPort = 9876
+	
+	// Auth timeout
+	authTimeout = 10 * time.Minute
+)
+
+// KiroTokenResponse represents the response from Kiro token endpoint.
+type KiroTokenResponse struct {
+	AccessToken  string `json:"accessToken"`
+	RefreshToken string `json:"refreshToken"`
+	ProfileArn   string `json:"profileArn"`
+	ExpiresIn    int    `json:"expiresIn"`
+}
+
+// KiroOAuth handles the OAuth flow for Kiro authentication.
+type KiroOAuth struct {
+	httpClient *http.Client
+	cfg        *config.Config
+}
+
+// NewKiroOAuth creates a new Kiro OAuth handler.
+func NewKiroOAuth(cfg *config.Config) *KiroOAuth {
+	client := &http.Client{Timeout: 30 * time.Second}
+	if cfg != nil {
+		client = util.SetProxy(&cfg.SDKConfig, client)
+	}
+	return &KiroOAuth{
+		httpClient: client,
+		cfg:        cfg,
+	}
+}
+
+// generateCodeVerifier generates a random code verifier for PKCE.
+func generateCodeVerifier() (string, error) {
+	b := make([]byte, 32)
+	if _, err := rand.Read(b); err != nil {
+		return "", err
+	}
+	return base64.RawURLEncoding.EncodeToString(b), nil
+}
+
+// generateCodeChallenge generates the code challenge from verifier.
+func generateCodeChallenge(verifier string) string {
+	h := sha256.Sum256([]byte(verifier))
+	return base64.RawURLEncoding.EncodeToString(h[:])
+}
+
+// generateState generates a random state parameter.
+func generateState() (string, error) {
+	b := make([]byte, 16)
+	if _, err := rand.Read(b); err != nil {
+		return "", err
+	}
+	return base64.RawURLEncoding.EncodeToString(b), nil
+}
+
+// AuthResult contains the authorization code and state from callback.
+type AuthResult struct {
+	Code  string
+	State string
+	Error string
+}
+
+// startCallbackServer starts a local HTTP server to receive the OAuth callback.
+func (o *KiroOAuth) startCallbackServer(ctx context.Context, expectedState string) (string, <-chan AuthResult, error) {
+	// Try to find an available port - use localhost like Kiro does
+	listener, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", defaultCallbackPort))
+	if err != nil {
+		// Try with dynamic port (RFC 8252 allows dynamic ports for native apps)
+		log.Warnf("kiro oauth: default port %d is busy, falling back to dynamic port", defaultCallbackPort)
+		listener, err = net.Listen("tcp", "localhost:0")
+		if err != nil {
+			return "", nil, fmt.Errorf("failed to start callback server: %w", err)
+		}
+	}
+
+	port := listener.Addr().(*net.TCPAddr).Port
+	// Use http scheme for local callback server
+	redirectURI := fmt.Sprintf("http://localhost:%d/oauth/callback", port)
+	resultChan := make(chan AuthResult, 1)
+
+	server := &http.Server{
+		ReadHeaderTimeout: 10 * time.Second,
+	}
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/oauth/callback", func(w http.ResponseWriter, r *http.Request) {
+		code := r.URL.Query().Get("code")
+		state := r.URL.Query().Get("state")
+		errParam := r.URL.Query().Get("error")
+
+		if errParam != "" {
+			w.Header().Set("Content-Type", "text/html")
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprintf(w, `<html><body><h1>Login Failed</h1><p>%s</p><p>You can close this window.</p></body></html>`, html.EscapeString(errParam))
+			resultChan <- AuthResult{Error: errParam}
+			return
+		}
+
+		if state != expectedState {
+			w.Header().Set("Content-Type", "text/html")
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprint(w, `<html><body><h1>Login Failed</h1><p>Invalid state parameter</p><p>You can close this window.</p></body></html>`)
+			resultChan <- AuthResult{Error: "state mismatch"}
+			return
+		}
+
+		w.Header().Set("Content-Type", "text/html")
+		fmt.Fprint(w, `<html><body><h1>Login Successful!</h1><p>You can close this window and return to the terminal.</p></body></html>`)
+		resultChan <- AuthResult{Code: code, State: state}
+	})
+
+	server.Handler = mux
+
+	go func() {
+		if err := server.Serve(listener); err != nil && err != http.ErrServerClosed {
+			log.Debugf("callback server error: %v", err)
+		}
+	}()
+
+	go func() {
+		select {
+		case <-ctx.Done():
+		case <-time.After(authTimeout):
+		case <-resultChan:
+		}
+		_ = server.Shutdown(context.Background())
+	}()
+
+	return redirectURI, resultChan, nil
+}
+
+// LoginWithBuilderID performs OAuth login with AWS Builder ID using device code flow.
+func (o *KiroOAuth) LoginWithBuilderID(ctx context.Context) (*KiroTokenData, error) {
+	ssoClient := NewSSOOIDCClient(o.cfg)
+	return ssoClient.LoginWithBuilderID(ctx)
+}
+
+// LoginWithBuilderIDAuthCode performs OAuth login with AWS Builder ID using authorization code flow.
+// This provides a better UX than device code flow as it uses automatic browser callback.
+func (o *KiroOAuth) LoginWithBuilderIDAuthCode(ctx context.Context) (*KiroTokenData, error) {
+	ssoClient := NewSSOOIDCClient(o.cfg)
+	return ssoClient.LoginWithBuilderIDAuthCode(ctx)
+}
+
+// exchangeCodeForToken exchanges the authorization code for tokens.
+func (o *KiroOAuth) exchangeCodeForToken(ctx context.Context, code, codeVerifier, redirectURI string) (*KiroTokenData, error) {
+	payload := map[string]string{
+		"code":          code,
+		"code_verifier": codeVerifier,
+		"redirect_uri":  redirectURI,
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal request: %w", err)
+	}
+
+	tokenURL := kiroAuthEndpoint + "/oauth/token"
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, tokenURL, strings.NewReader(string(body)))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", "cli-proxy-api/1.0.0")
+
+	resp, err := o.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("token request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("token exchange failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("token exchange failed (status %d)", resp.StatusCode)
+	}
+
+	var tokenResp KiroTokenResponse
+	if err := json.Unmarshal(respBody, &tokenResp); err != nil {
+		return nil, fmt.Errorf("failed to parse token response: %w", err)
+	}
+
+	// Validate ExpiresIn - use default 1 hour if invalid
+	expiresIn := tokenResp.ExpiresIn
+	if expiresIn <= 0 {
+		expiresIn = 3600
+	}
+	expiresAt := time.Now().Add(time.Duration(expiresIn) * time.Second)
+
+	return &KiroTokenData{
+		AccessToken:  tokenResp.AccessToken,
+		RefreshToken: tokenResp.RefreshToken,
+		ProfileArn:   tokenResp.ProfileArn,
+		ExpiresAt:    expiresAt.Format(time.RFC3339),
+		AuthMethod:   "social",
+		Provider:     "", // Caller should preserve original provider
+	}, nil
+}
+
+// RefreshToken refreshes an expired access token.
+func (o *KiroOAuth) RefreshToken(ctx context.Context, refreshToken string) (*KiroTokenData, error) {
+	payload := map[string]string{
+		"refreshToken": refreshToken,
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal request: %w", err)
+	}
+
+	refreshURL := kiroAuthEndpoint + "/refreshToken"
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, refreshURL, strings.NewReader(string(body)))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", "cli-proxy-api/1.0.0")
+
+	resp, err := o.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("refresh request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("token refresh failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("token refresh failed (status %d)", resp.StatusCode)
+	}
+
+	var tokenResp KiroTokenResponse
+	if err := json.Unmarshal(respBody, &tokenResp); err != nil {
+		return nil, fmt.Errorf("failed to parse token response: %w", err)
+	}
+
+	// Validate ExpiresIn - use default 1 hour if invalid
+	expiresIn := tokenResp.ExpiresIn
+	if expiresIn <= 0 {
+		expiresIn = 3600
+	}
+	expiresAt := time.Now().Add(time.Duration(expiresIn) * time.Second)
+
+	return &KiroTokenData{
+		AccessToken:  tokenResp.AccessToken,
+		RefreshToken: tokenResp.RefreshToken,
+		ProfileArn:   tokenResp.ProfileArn,
+		ExpiresAt:    expiresAt.Format(time.RFC3339),
+		AuthMethod:   "social",
+		Provider:     "", // Caller should preserve original provider
+	}, nil
+}
+
+// LoginWithGoogle performs OAuth login with Google using Kiro's social auth.
+// This uses a custom protocol handler (kiro://) to receive the callback.
+func (o *KiroOAuth) LoginWithGoogle(ctx context.Context) (*KiroTokenData, error) {
+	socialClient := NewSocialAuthClient(o.cfg)
+	return socialClient.LoginWithGoogle(ctx)
+}
+
+// LoginWithGitHub performs OAuth login with GitHub using Kiro's social auth.
+// This uses a custom protocol handler (kiro://) to receive the callback.
+func (o *KiroOAuth) LoginWithGitHub(ctx context.Context) (*KiroTokenData, error) {
+	socialClient := NewSocialAuthClient(o.cfg)
+	return socialClient.LoginWithGitHub(ctx)
+}

internal/auth/kiro/protocol_handler.go

@@ -0,0 +1,725 @@
+// Package kiro provides custom protocol handler registration for Kiro OAuth.
+// This enables the CLI to intercept kiro:// URIs for social authentication (Google/GitHub).
+package kiro
+
+import (
+	"context"
+	"fmt"
+	"html"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"sync"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	// KiroProtocol is the custom URI scheme used by Kiro
+	KiroProtocol = "kiro"
+
+	// KiroAuthority is the URI authority for authentication callbacks
+	KiroAuthority = "kiro.kiroAgent"
+
+	// KiroAuthPath is the path for successful authentication
+	KiroAuthPath = "/authenticate-success"
+
+	// KiroRedirectURI is the full redirect URI for social auth
+	KiroRedirectURI = "kiro://kiro.kiroAgent/authenticate-success"
+
+	// DefaultHandlerPort is the default port for the local callback server
+	DefaultHandlerPort = 19876
+
+	// HandlerTimeout is how long to wait for the OAuth callback
+	HandlerTimeout = 10 * time.Minute
+)
+
+// ProtocolHandler manages the custom kiro:// protocol handler for OAuth callbacks.
+type ProtocolHandler struct {
+	port       int
+	server     *http.Server
+	listener   net.Listener
+	resultChan chan *AuthCallback
+	stopChan   chan struct{}
+	mu         sync.Mutex
+	running    bool
+}
+
+// AuthCallback contains the OAuth callback parameters.
+type AuthCallback struct {
+	Code  string
+	State string
+	Error string
+}
+
+// NewProtocolHandler creates a new protocol handler.
+func NewProtocolHandler() *ProtocolHandler {
+	return &ProtocolHandler{
+		port:       DefaultHandlerPort,
+		resultChan: make(chan *AuthCallback, 1),
+		stopChan:   make(chan struct{}),
+	}
+}
+
+// Start starts the local callback server that receives redirects from the protocol handler.
+func (h *ProtocolHandler) Start(ctx context.Context) (int, error) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+
+	if h.running {
+		return h.port, nil
+	}
+
+	// Drain any stale results from previous runs
+	select {
+	case <-h.resultChan:
+	default:
+	}
+
+	// Reset stopChan for reuse - close old channel first to unblock any waiting goroutines
+	if h.stopChan != nil {
+		select {
+		case <-h.stopChan:
+			// Already closed
+		default:
+			close(h.stopChan)
+		}
+	}
+	h.stopChan = make(chan struct{})
+
+	// Try ports in known range (must match handler script port range)
+	var listener net.Listener
+	var err error
+	portRange := []int{DefaultHandlerPort, DefaultHandlerPort + 1, DefaultHandlerPort + 2, DefaultHandlerPort + 3, DefaultHandlerPort + 4}
+	
+	for _, port := range portRange {
+		listener, err = net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", port))
+		if err == nil {
+			break
+		}
+		log.Debugf("kiro protocol handler: port %d busy, trying next", port)
+	}
+	
+	if listener == nil {
+		return 0, fmt.Errorf("failed to start callback server: all ports %d-%d are busy", DefaultHandlerPort, DefaultHandlerPort+4)
+	}
+
+	h.listener = listener
+	h.port = listener.Addr().(*net.TCPAddr).Port
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/oauth/callback", h.handleCallback)
+
+	h.server = &http.Server{
+		Handler:           mux,
+		ReadHeaderTimeout: 10 * time.Second,
+	}
+
+	go func() {
+		if err := h.server.Serve(listener); err != nil && err != http.ErrServerClosed {
+			log.Debugf("kiro protocol handler server error: %v", err)
+		}
+	}()
+
+	h.running = true
+	log.Debugf("kiro protocol handler started on port %d", h.port)
+
+	// Auto-shutdown after context done, timeout, or explicit stop
+	// Capture references to prevent race with new Start() calls
+	currentStopChan := h.stopChan
+	currentServer := h.server
+	currentListener := h.listener
+	go func() {
+		select {
+		case <-ctx.Done():
+		case <-time.After(HandlerTimeout):
+		case <-currentStopChan:
+			return // Already stopped, exit goroutine
+		}
+		// Only stop if this is still the current server/listener instance
+		h.mu.Lock()
+		if h.server == currentServer && h.listener == currentListener {
+			h.mu.Unlock()
+			h.Stop()
+		} else {
+			h.mu.Unlock()
+		}
+	}()
+
+	return h.port, nil
+}
+
+// Stop stops the callback server.
+func (h *ProtocolHandler) Stop() {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+
+	if !h.running {
+		return
+	}
+
+	// Signal the auto-shutdown goroutine to exit.
+	// This select pattern is safe because stopChan is only modified while holding h.mu,
+	// and we hold the lock here. The select prevents panic from double-close.
+	select {
+	case <-h.stopChan:
+		// Already closed
+	default:
+		close(h.stopChan)
+	}
+
+	if h.server != nil {
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		_ = h.server.Shutdown(ctx)
+	}
+
+	h.running = false
+	log.Debug("kiro protocol handler stopped")
+}
+
+// WaitForCallback waits for the OAuth callback and returns the result.
+func (h *ProtocolHandler) WaitForCallback(ctx context.Context) (*AuthCallback, error) {
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case <-time.After(HandlerTimeout):
+		return nil, fmt.Errorf("timeout waiting for OAuth callback")
+	case result := <-h.resultChan:
+		return result, nil
+	}
+}
+
+// GetPort returns the port the handler is listening on.
+func (h *ProtocolHandler) GetPort() int {
+	return h.port
+}
+
+// handleCallback processes the OAuth callback from the protocol handler script.
+func (h *ProtocolHandler) handleCallback(w http.ResponseWriter, r *http.Request) {
+	code := r.URL.Query().Get("code")
+	state := r.URL.Query().Get("state")
+	errParam := r.URL.Query().Get("error")
+
+	result := &AuthCallback{
+		Code:  code,
+		State: state,
+		Error: errParam,
+	}
+
+	// Send result
+	select {
+	case h.resultChan <- result:
+	default:
+		// Channel full, ignore duplicate callbacks
+	}
+
+	// Send success response
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	if errParam != "" {
+		w.WriteHeader(http.StatusBadRequest)
+		fmt.Fprintf(w, `<!DOCTYPE html>
+<html>
+<head><title>Login Failed</title></head>
+<body>
+<h1>Login Failed</h1>
+<p>Error: %s</p>
+<p>You can close this window.</p>
+</body>
+</html>`, html.EscapeString(errParam))
+	} else {
+		fmt.Fprint(w, `<!DOCTYPE html>
+<html>
+<head><title>Login Successful</title></head>
+<body>
+<h1>Login Successful!</h1>
+<p>You can close this window and return to the terminal.</p>
+<script>window.close();</script>
+</body>
+</html>`)
+	}
+}
+
+// IsProtocolHandlerInstalled checks if the kiro:// protocol handler is installed.
+func IsProtocolHandlerInstalled() bool {
+	switch runtime.GOOS {
+	case "linux":
+		return isLinuxHandlerInstalled()
+	case "windows":
+		return isWindowsHandlerInstalled()
+	case "darwin":
+		return isDarwinHandlerInstalled()
+	default:
+		return false
+	}
+}
+
+// InstallProtocolHandler installs the kiro:// protocol handler for the current platform.
+func InstallProtocolHandler(handlerPort int) error {
+	switch runtime.GOOS {
+	case "linux":
+		return installLinuxHandler(handlerPort)
+	case "windows":
+		return installWindowsHandler(handlerPort)
+	case "darwin":
+		return installDarwinHandler(handlerPort)
+	default:
+		return fmt.Errorf("unsupported platform: %s", runtime.GOOS)
+	}
+}
+
+// UninstallProtocolHandler removes the kiro:// protocol handler.
+func UninstallProtocolHandler() error {
+	switch runtime.GOOS {
+	case "linux":
+		return uninstallLinuxHandler()
+	case "windows":
+		return uninstallWindowsHandler()
+	case "darwin":
+		return uninstallDarwinHandler()
+	default:
+		return fmt.Errorf("unsupported platform: %s", runtime.GOOS)
+	}
+}
+
+// --- Linux Implementation ---
+
+func getLinuxDesktopPath() string {
+	homeDir, _ := os.UserHomeDir()
+	return filepath.Join(homeDir, ".local", "share", "applications", "kiro-oauth-handler.desktop")
+}
+
+func getLinuxHandlerScriptPath() string {
+	homeDir, _ := os.UserHomeDir()
+	return filepath.Join(homeDir, ".local", "bin", "kiro-oauth-handler")
+}
+
+func isLinuxHandlerInstalled() bool {
+	desktopPath := getLinuxDesktopPath()
+	_, err := os.Stat(desktopPath)
+	return err == nil
+}
+
+func installLinuxHandler(handlerPort int) error {
+	// Create directories
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return err
+	}
+
+	binDir := filepath.Join(homeDir, ".local", "bin")
+	appDir := filepath.Join(homeDir, ".local", "share", "applications")
+
+	if err := os.MkdirAll(binDir, 0755); err != nil {
+		return fmt.Errorf("failed to create bin directory: %w", err)
+	}
+	if err := os.MkdirAll(appDir, 0755); err != nil {
+		return fmt.Errorf("failed to create applications directory: %w", err)
+	}
+
+	// Create handler script - tries multiple ports to handle dynamic port allocation
+	scriptPath := getLinuxHandlerScriptPath()
+	scriptContent := fmt.Sprintf(`#!/bin/bash
+# Kiro OAuth Protocol Handler
+# Handles kiro:// URIs - tries CLI first, then forwards to Kiro IDE
+
+URL="$1"
+
+# Check curl availability
+if ! command -v curl &> /dev/null; then
+    echo "Error: curl is required for Kiro OAuth handler" >&2
+    exit 1
+fi
+
+# Extract code and state from URL
+[[ "$URL" =~ code=([^&]+) ]] && CODE="${BASH_REMATCH[1]}"
+[[ "$URL" =~ state=([^&]+) ]] && STATE="${BASH_REMATCH[1]}"
+[[ "$URL" =~ error=([^&]+) ]] && ERROR="${BASH_REMATCH[1]}"
+
+# Try CLI proxy on multiple possible ports (default + dynamic range)
+CLI_OK=0
+for PORT in %d %d %d %d %d; do
+    if [ -n "$ERROR" ]; then
+        curl -sf --connect-timeout 1 "http://127.0.0.1:$PORT/oauth/callback?error=$ERROR" && CLI_OK=1 && break
+    elif [ -n "$CODE" ] && [ -n "$STATE" ]; then
+        curl -sf --connect-timeout 1 "http://127.0.0.1:$PORT/oauth/callback?code=$CODE&state=$STATE" && CLI_OK=1 && break
+    fi
+done
+
+# If CLI not available, forward to Kiro IDE
+if [ $CLI_OK -eq 0 ] && [ -x "/usr/share/kiro/kiro" ]; then
+    /usr/share/kiro/kiro --open-url "$URL" &
+fi
+`, handlerPort, handlerPort+1, handlerPort+2, handlerPort+3, handlerPort+4)
+
+	if err := os.WriteFile(scriptPath, []byte(scriptContent), 0755); err != nil {
+		return fmt.Errorf("failed to write handler script: %w", err)
+	}
+
+	// Create .desktop file
+	desktopPath := getLinuxDesktopPath()
+	desktopContent := fmt.Sprintf(`[Desktop Entry]
+Name=Kiro OAuth Handler
+Comment=Handle kiro:// protocol for CLI Proxy API authentication
+Exec=%s %%u
+Type=Application
+Terminal=false
+NoDisplay=true
+MimeType=x-scheme-handler/kiro;
+Categories=Utility;
+`, scriptPath)
+
+	if err := os.WriteFile(desktopPath, []byte(desktopContent), 0644); err != nil {
+		return fmt.Errorf("failed to write desktop file: %w", err)
+	}
+
+	// Register handler with xdg-mime
+	cmd := exec.Command("xdg-mime", "default", "kiro-oauth-handler.desktop", "x-scheme-handler/kiro")
+	if err := cmd.Run(); err != nil {
+		log.Warnf("xdg-mime registration failed (may need manual setup): %v", err)
+	}
+
+	// Update desktop database
+	cmd = exec.Command("update-desktop-database", appDir)
+	_ = cmd.Run() // Ignore errors, not critical
+
+	log.Info("Kiro protocol handler installed for Linux")
+	return nil
+}
+
+func uninstallLinuxHandler() error {
+	desktopPath := getLinuxDesktopPath()
+	scriptPath := getLinuxHandlerScriptPath()
+
+	if err := os.Remove(desktopPath); err != nil && !os.IsNotExist(err) {
+		return fmt.Errorf("failed to remove desktop file: %w", err)
+	}
+	if err := os.Remove(scriptPath); err != nil && !os.IsNotExist(err) {
+		return fmt.Errorf("failed to remove handler script: %w", err)
+	}
+
+	log.Info("Kiro protocol handler uninstalled")
+	return nil
+}
+
+// --- Windows Implementation ---
+
+func isWindowsHandlerInstalled() bool {
+	// Check registry key existence
+	cmd := exec.Command("reg", "query", `HKCU\Software\Classes\kiro`, "/ve")
+	return cmd.Run() == nil
+}
+
+func installWindowsHandler(handlerPort int) error {
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return err
+	}
+
+	// Create handler script (PowerShell)
+	scriptDir := filepath.Join(homeDir, ".cliproxyapi")
+	if err := os.MkdirAll(scriptDir, 0755); err != nil {
+		return fmt.Errorf("failed to create script directory: %w", err)
+	}
+
+	scriptPath := filepath.Join(scriptDir, "kiro-oauth-handler.ps1")
+	scriptContent := fmt.Sprintf(`# Kiro OAuth Protocol Handler for Windows
+param([string]$url)
+
+# Load required assembly for HttpUtility
+Add-Type -AssemblyName System.Web
+
+# Parse URL parameters
+$uri = [System.Uri]$url
+$query = [System.Web.HttpUtility]::ParseQueryString($uri.Query)
+$code = $query["code"]
+$state = $query["state"]
+$errorParam = $query["error"]
+
+# Try multiple ports (default + dynamic range)
+$ports = @(%d, %d, %d, %d, %d)
+$success = $false
+
+foreach ($port in $ports) {
+    if ($success) { break }
+    $callbackUrl = "http://127.0.0.1:$port/oauth/callback"
+    try {
+        if ($errorParam) {
+            $fullUrl = $callbackUrl + "?error=" + $errorParam
+            Invoke-WebRequest -Uri $fullUrl -UseBasicParsing -TimeoutSec 1 -ErrorAction Stop | Out-Null
+            $success = $true
+        } elseif ($code -and $state) {
+            $fullUrl = $callbackUrl + "?code=" + $code + "&state=" + $state
+            Invoke-WebRequest -Uri $fullUrl -UseBasicParsing -TimeoutSec 1 -ErrorAction Stop | Out-Null
+            $success = $true
+        }
+    } catch {
+        # Try next port
+    }
+}
+`, handlerPort, handlerPort+1, handlerPort+2, handlerPort+3, handlerPort+4)
+
+	if err := os.WriteFile(scriptPath, []byte(scriptContent), 0644); err != nil {
+		return fmt.Errorf("failed to write handler script: %w", err)
+	}
+
+	// Create batch wrapper
+	batchPath := filepath.Join(scriptDir, "kiro-oauth-handler.bat")
+	batchContent := fmt.Sprintf("@echo off\npowershell -ExecutionPolicy Bypass -File \"%s\" %%1\n", scriptPath)
+
+	if err := os.WriteFile(batchPath, []byte(batchContent), 0644); err != nil {
+		return fmt.Errorf("failed to write batch wrapper: %w", err)
+	}
+
+	// Register in Windows registry
+	commands := [][]string{
+		{"reg", "add", `HKCU\Software\Classes\kiro`, "/ve", "/d", "URL:Kiro Protocol", "/f"},
+		{"reg", "add", `HKCU\Software\Classes\kiro`, "/v", "URL Protocol", "/d", "", "/f"},
+		{"reg", "add", `HKCU\Software\Classes\kiro\shell`, "/f"},
+		{"reg", "add", `HKCU\Software\Classes\kiro\shell\open`, "/f"},
+		{"reg", "add", `HKCU\Software\Classes\kiro\shell\open\command`, "/ve", "/d", fmt.Sprintf("\"%s\" \"%%1\"", batchPath), "/f"},
+	}
+
+	for _, args := range commands {
+		cmd := exec.Command(args[0], args[1:]...)
+		if err := cmd.Run(); err != nil {
+			return fmt.Errorf("failed to run registry command: %w", err)
+		}
+	}
+
+	log.Info("Kiro protocol handler installed for Windows")
+	return nil
+}
+
+func uninstallWindowsHandler() error {
+	// Remove registry keys
+	cmd := exec.Command("reg", "delete", `HKCU\Software\Classes\kiro`, "/f")
+	if err := cmd.Run(); err != nil {
+		log.Warnf("failed to remove registry key: %v", err)
+	}
+
+	// Remove scripts
+	homeDir, _ := os.UserHomeDir()
+	scriptDir := filepath.Join(homeDir, ".cliproxyapi")
+	_ = os.Remove(filepath.Join(scriptDir, "kiro-oauth-handler.ps1"))
+	_ = os.Remove(filepath.Join(scriptDir, "kiro-oauth-handler.bat"))
+
+	log.Info("Kiro protocol handler uninstalled")
+	return nil
+}
+
+// --- macOS Implementation ---
+
+func getDarwinAppPath() string {
+	homeDir, _ := os.UserHomeDir()
+	return filepath.Join(homeDir, "Applications", "KiroOAuthHandler.app")
+}
+
+func isDarwinHandlerInstalled() bool {
+	appPath := getDarwinAppPath()
+	_, err := os.Stat(appPath)
+	return err == nil
+}
+
+func installDarwinHandler(handlerPort int) error {
+	// Create app bundle structure
+	appPath := getDarwinAppPath()
+	contentsPath := filepath.Join(appPath, "Contents")
+	macOSPath := filepath.Join(contentsPath, "MacOS")
+
+	if err := os.MkdirAll(macOSPath, 0755); err != nil {
+		return fmt.Errorf("failed to create app bundle: %w", err)
+	}
+
+	// Create Info.plist
+	plistPath := filepath.Join(contentsPath, "Info.plist")
+	plistContent := `<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>CFBundleIdentifier</key>
+    <string>com.cliproxyapi.kiro-oauth-handler</string>
+    <key>CFBundleName</key>
+    <string>KiroOAuthHandler</string>
+    <key>CFBundleExecutable</key>
+    <string>kiro-oauth-handler</string>
+    <key>CFBundleVersion</key>
+    <string>1.0</string>
+    <key>CFBundleURLTypes</key>
+    <array>
+        <dict>
+            <key>CFBundleURLName</key>
+            <string>Kiro Protocol</string>
+            <key>CFBundleURLSchemes</key>
+            <array>
+                <string>kiro</string>
+            </array>
+        </dict>
+    </array>
+    <key>LSBackgroundOnly</key>
+    <true/>
+</dict>
+</plist>`
+
+	if err := os.WriteFile(plistPath, []byte(plistContent), 0644); err != nil {
+		return fmt.Errorf("failed to write Info.plist: %w", err)
+	}
+
+	// Create executable script - tries multiple ports to handle dynamic port allocation
+	execPath := filepath.Join(macOSPath, "kiro-oauth-handler")
+	execContent := fmt.Sprintf(`#!/bin/bash
+# Kiro OAuth Protocol Handler for macOS
+
+URL="$1"
+
+# Check curl availability (should always exist on macOS)
+if [ ! -x /usr/bin/curl ]; then
+    echo "Error: curl is required for Kiro OAuth handler" >&2
+    exit 1
+fi
+
+# Extract code and state from URL
+[[ "$URL" =~ code=([^&]+) ]] && CODE="${BASH_REMATCH[1]}"
+[[ "$URL" =~ state=([^&]+) ]] && STATE="${BASH_REMATCH[1]}"
+[[ "$URL" =~ error=([^&]+) ]] && ERROR="${BASH_REMATCH[1]}"
+
+# Try multiple ports (default + dynamic range)
+for PORT in %d %d %d %d %d; do
+    if [ -n "$ERROR" ]; then
+        /usr/bin/curl -sf --connect-timeout 1 "http://127.0.0.1:$PORT/oauth/callback?error=$ERROR" && exit 0
+    elif [ -n "$CODE" ] && [ -n "$STATE" ]; then
+        /usr/bin/curl -sf --connect-timeout 1 "http://127.0.0.1:$PORT/oauth/callback?code=$CODE&state=$STATE" && exit 0
+    fi
+done
+`, handlerPort, handlerPort+1, handlerPort+2, handlerPort+3, handlerPort+4)
+
+	if err := os.WriteFile(execPath, []byte(execContent), 0755); err != nil {
+		return fmt.Errorf("failed to write executable: %w", err)
+	}
+
+	// Register the app with Launch Services
+	cmd := exec.Command("/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister",
+		"-f", appPath)
+	if err := cmd.Run(); err != nil {
+		log.Warnf("lsregister failed (handler may still work): %v", err)
+	}
+
+	log.Info("Kiro protocol handler installed for macOS")
+	return nil
+}
+
+func uninstallDarwinHandler() error {
+	appPath := getDarwinAppPath()
+
+	// Unregister from Launch Services
+	cmd := exec.Command("/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister",
+		"-u", appPath)
+	_ = cmd.Run()
+
+	// Remove app bundle
+	if err := os.RemoveAll(appPath); err != nil && !os.IsNotExist(err) {
+		return fmt.Errorf("failed to remove app bundle: %w", err)
+	}
+
+	log.Info("Kiro protocol handler uninstalled")
+	return nil
+}
+
+// ParseKiroURI parses a kiro:// URI and extracts the callback parameters.
+func ParseKiroURI(rawURI string) (*AuthCallback, error) {
+	u, err := url.Parse(rawURI)
+	if err != nil {
+		return nil, fmt.Errorf("invalid URI: %w", err)
+	}
+
+	if u.Scheme != KiroProtocol {
+		return nil, fmt.Errorf("invalid scheme: expected %s, got %s", KiroProtocol, u.Scheme)
+	}
+
+	if u.Host != KiroAuthority {
+		return nil, fmt.Errorf("invalid authority: expected %s, got %s", KiroAuthority, u.Host)
+	}
+
+	query := u.Query()
+	return &AuthCallback{
+		Code:  query.Get("code"),
+		State: query.Get("state"),
+		Error: query.Get("error"),
+	}, nil
+}
+
+// GetHandlerInstructions returns platform-specific instructions for manual handler setup.
+func GetHandlerInstructions() string {
+	switch runtime.GOOS {
+	case "linux":
+		return `To manually set up the Kiro protocol handler on Linux:
+
+1. Create ~/.local/share/applications/kiro-oauth-handler.desktop:
+   [Desktop Entry]
+   Name=Kiro OAuth Handler
+   Exec=~/.local/bin/kiro-oauth-handler %u
+   Type=Application
+   Terminal=false
+   MimeType=x-scheme-handler/kiro;
+
+2. Create ~/.local/bin/kiro-oauth-handler (make it executable):
+   #!/bin/bash
+   URL="$1"
+   # ... (see generated script for full content)
+
+3. Run: xdg-mime default kiro-oauth-handler.desktop x-scheme-handler/kiro`
+
+	case "windows":
+		return `To manually set up the Kiro protocol handler on Windows:
+
+1. Open Registry Editor (regedit.exe)
+2. Create key: HKEY_CURRENT_USER\Software\Classes\kiro
+3. Set default value to: URL:Kiro Protocol
+4. Create string value "URL Protocol" with empty data
+5. Create subkey: shell\open\command
+6. Set default value to: "C:\path\to\handler.bat" "%1"`
+
+	case "darwin":
+		return `To manually set up the Kiro protocol handler on macOS:
+
+1. Create ~/Applications/KiroOAuthHandler.app bundle
+2. Add Info.plist with CFBundleURLTypes containing "kiro" scheme
+3. Create executable in Contents/MacOS/
+4. Run: /System/Library/.../lsregister -f ~/Applications/KiroOAuthHandler.app`
+
+	default:
+		return "Protocol handler setup is not supported on this platform."
+	}
+}
+
+// SetupProtocolHandlerIfNeeded checks and installs the protocol handler if needed.
+func SetupProtocolHandlerIfNeeded(handlerPort int) error {
+	if IsProtocolHandlerInstalled() {
+		log.Debug("Kiro protocol handler already installed")
+		return nil
+	}
+
+	fmt.Println("\n╔══════════════════════════════════════════════════════════╗")
+	fmt.Println("║       Kiro Protocol Handler Setup Required                 ║")
+	fmt.Println("╚══════════════════════════════════════════════════════════╝")
+	fmt.Println("\nTo enable Google/GitHub login, we need to install a protocol handler.")
+	fmt.Println("This allows your browser to redirect back to the CLI after authentication.")
+	fmt.Println("\nInstalling protocol handler...")
+
+	if err := InstallProtocolHandler(handlerPort); err != nil {
+		fmt.Printf("\n⚠ Automatic installation failed: %v\n", err)
+		fmt.Println("\nManual setup instructions:")
+		fmt.Println(strings.Repeat("-", 60))
+		fmt.Println(GetHandlerInstructions())
+		return err
+	}
+
+	fmt.Println("\n✓ Protocol handler installed successfully!")
+	return nil
+}

internal/auth/kiro/social_auth.go

@@ -0,0 +1,403 @@
+// Package kiro provides social authentication (Google/GitHub) for Kiro via AuthServiceClient.
+package kiro
+
+import (
+	"bufio"
+	"context"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	"os/exec"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/browser"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
+	log "github.com/sirupsen/logrus"
+	"golang.org/x/term"
+)
+
+const (
+	// Kiro AuthService endpoint
+	kiroAuthServiceEndpoint = "https://prod.us-east-1.auth.desktop.kiro.dev"
+
+	// OAuth timeout
+	socialAuthTimeout = 10 * time.Minute
+)
+
+// SocialProvider represents the social login provider.
+type SocialProvider string
+
+const (
+	// ProviderGoogle is Google OAuth provider
+	ProviderGoogle SocialProvider = "Google"
+	// ProviderGitHub is GitHub OAuth provider
+	ProviderGitHub SocialProvider = "Github"
+	// Note: AWS Builder ID is NOT supported by Kiro's auth service.
+	// It only supports: Google, Github, Cognito
+	// AWS Builder ID must use device code flow via SSO OIDC.
+)
+
+// CreateTokenRequest is sent to Kiro's /oauth/token endpoint.
+type CreateTokenRequest struct {
+	Code           string `json:"code"`
+	CodeVerifier   string `json:"code_verifier"`
+	RedirectURI    string `json:"redirect_uri"`
+	InvitationCode string `json:"invitation_code,omitempty"`
+}
+
+// SocialTokenResponse from Kiro's /oauth/token endpoint for social auth.
+type SocialTokenResponse struct {
+	AccessToken  string `json:"accessToken"`
+	RefreshToken string `json:"refreshToken"`
+	ProfileArn   string `json:"profileArn"`
+	ExpiresIn    int    `json:"expiresIn"`
+}
+
+// RefreshTokenRequest is sent to Kiro's /refreshToken endpoint.
+type RefreshTokenRequest struct {
+	RefreshToken string `json:"refreshToken"`
+}
+
+// SocialAuthClient handles social authentication with Kiro.
+type SocialAuthClient struct {
+	httpClient      *http.Client
+	cfg             *config.Config
+	protocolHandler *ProtocolHandler
+}
+
+// NewSocialAuthClient creates a new social auth client.
+func NewSocialAuthClient(cfg *config.Config) *SocialAuthClient {
+	client := &http.Client{Timeout: 30 * time.Second}
+	if cfg != nil {
+		client = util.SetProxy(&cfg.SDKConfig, client)
+	}
+	return &SocialAuthClient{
+		httpClient:      client,
+		cfg:             cfg,
+		protocolHandler: NewProtocolHandler(),
+	}
+}
+
+// generatePKCE generates PKCE code verifier and challenge.
+func generatePKCE() (verifier, challenge string, err error) {
+	// Generate 32 bytes of random data for verifier
+	b := make([]byte, 32)
+	if _, err := rand.Read(b); err != nil {
+		return "", "", fmt.Errorf("failed to generate random bytes: %w", err)
+	}
+	verifier = base64.RawURLEncoding.EncodeToString(b)
+
+	// Generate SHA256 hash of verifier for challenge
+	h := sha256.Sum256([]byte(verifier))
+	challenge = base64.RawURLEncoding.EncodeToString(h[:])
+
+	return verifier, challenge, nil
+}
+
+// generateState generates a random state parameter.
+func generateStateParam() (string, error) {
+	b := make([]byte, 16)
+	if _, err := rand.Read(b); err != nil {
+		return "", err
+	}
+	return base64.RawURLEncoding.EncodeToString(b), nil
+}
+
+// buildLoginURL constructs the Kiro OAuth login URL.
+// The login endpoint expects a GET request with query parameters.
+// Format: /login?idp=Google&redirect_uri=...&code_challenge=...&code_challenge_method=S256&state=...&prompt=select_account
+// The prompt=select_account parameter forces the account selection screen even if already logged in.
+func (c *SocialAuthClient) buildLoginURL(provider, redirectURI, codeChallenge, state string) string {
+	return fmt.Sprintf("%s/login?idp=%s&redirect_uri=%s&code_challenge=%s&code_challenge_method=S256&state=%s&prompt=select_account",
+		kiroAuthServiceEndpoint,
+		provider,
+		url.QueryEscape(redirectURI),
+		codeChallenge,
+		state,
+	)
+}
+
+// CreateToken exchanges the authorization code for tokens.
+func (c *SocialAuthClient) CreateToken(ctx context.Context, req *CreateTokenRequest) (*SocialTokenResponse, error) {
+	body, err := json.Marshal(req)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal token request: %w", err)
+	}
+
+	tokenURL := kiroAuthServiceEndpoint + "/oauth/token"
+	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, tokenURL, strings.NewReader(string(body)))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create token request: %w", err)
+	}
+
+	httpReq.Header.Set("Content-Type", "application/json")
+	httpReq.Header.Set("User-Agent", "cli-proxy-api/1.0.0")
+
+	resp, err := c.httpClient.Do(httpReq)
+	if err != nil {
+		return nil, fmt.Errorf("token request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read token response: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("token exchange failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("token exchange failed (status %d)", resp.StatusCode)
+	}
+
+	var tokenResp SocialTokenResponse
+	if err := json.Unmarshal(respBody, &tokenResp); err != nil {
+		return nil, fmt.Errorf("failed to parse token response: %w", err)
+	}
+
+	return &tokenResp, nil
+}
+
+// RefreshSocialToken refreshes an expired social auth token.
+func (c *SocialAuthClient) RefreshSocialToken(ctx context.Context, refreshToken string) (*KiroTokenData, error) {
+	body, err := json.Marshal(&RefreshTokenRequest{RefreshToken: refreshToken})
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal refresh request: %w", err)
+	}
+
+	refreshURL := kiroAuthServiceEndpoint + "/refreshToken"
+	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, refreshURL, strings.NewReader(string(body)))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create refresh request: %w", err)
+	}
+
+	httpReq.Header.Set("Content-Type", "application/json")
+	httpReq.Header.Set("User-Agent", "cli-proxy-api/1.0.0")
+
+	resp, err := c.httpClient.Do(httpReq)
+	if err != nil {
+		return nil, fmt.Errorf("refresh request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read refresh response: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("token refresh failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("token refresh failed (status %d)", resp.StatusCode)
+	}
+
+	var tokenResp SocialTokenResponse
+	if err := json.Unmarshal(respBody, &tokenResp); err != nil {
+		return nil, fmt.Errorf("failed to parse refresh response: %w", err)
+	}
+
+	// Validate ExpiresIn - use default 1 hour if invalid
+	expiresIn := tokenResp.ExpiresIn
+	if expiresIn <= 0 {
+		expiresIn = 3600 // Default 1 hour
+	}
+	expiresAt := time.Now().Add(time.Duration(expiresIn) * time.Second)
+
+	return &KiroTokenData{
+		AccessToken:  tokenResp.AccessToken,
+		RefreshToken: tokenResp.RefreshToken,
+		ProfileArn:   tokenResp.ProfileArn,
+		ExpiresAt:    expiresAt.Format(time.RFC3339),
+		AuthMethod:   "social",
+		Provider:     "", // Caller should preserve original provider
+	}, nil
+}
+
+// LoginWithSocial performs OAuth login with Google.
+func (c *SocialAuthClient) LoginWithSocial(ctx context.Context, provider SocialProvider) (*KiroTokenData, error) {
+	providerName := string(provider)
+
+	fmt.Println("\n╔══════════════════════════════════════════════════════════╗")
+	fmt.Printf("║         Kiro Authentication (%s)                    ║\n", providerName)
+	fmt.Println("╚══════════════════════════════════════════════════════════╝")
+
+	// Step 1: Setup protocol handler
+	fmt.Println("\nSetting up authentication...")
+
+	// Start the local callback server
+	handlerPort, err := c.protocolHandler.Start(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("failed to start callback server: %w", err)
+	}
+	defer c.protocolHandler.Stop()
+
+	// Ensure protocol handler is installed and set as default
+	if err := SetupProtocolHandlerIfNeeded(handlerPort); err != nil {
+		fmt.Println("\n⚠ Protocol handler setup failed. Trying alternative method...")
+		fmt.Println("  If you see a browser 'Open with' dialog, select your default browser.")
+		fmt.Println("  For manual setup instructions, run: cliproxy kiro --help-protocol")
+		log.Debugf("kiro: protocol handler setup error: %v", err)
+		// Continue anyway - user might have set it up manually or select browser manually
+	} else {
+		// Force set our handler as default (prevents "Open with" dialog)
+		forceDefaultProtocolHandler()
+	}
+
+	// Step 2: Generate PKCE codes
+	codeVerifier, codeChallenge, err := generatePKCE()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate PKCE: %w", err)
+	}
+
+	// Step 3: Generate state
+	state, err := generateStateParam()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate state: %w", err)
+	}
+
+	// Step 4: Build the login URL (Kiro uses GET request with query params)
+	authURL := c.buildLoginURL(providerName, KiroRedirectURI, codeChallenge, state)
+
+	// Set incognito mode based on config (defaults to true for Kiro, can be overridden with --no-incognito)
+	// Incognito mode enables multi-account support by bypassing cached sessions
+	if c.cfg != nil {
+		browser.SetIncognitoMode(c.cfg.IncognitoBrowser)
+		if !c.cfg.IncognitoBrowser {
+			log.Info("kiro: using normal browser mode (--no-incognito). Note: You may not be able to select a different account.")
+		} else {
+			log.Debug("kiro: using incognito mode for multi-account support")
+		}
+	} else {
+		browser.SetIncognitoMode(true) // Default to incognito if no config
+		log.Debug("kiro: using incognito mode for multi-account support (default)")
+	}
+
+	// Step 5: Open browser for user authentication
+	fmt.Println("\n════════════���═══════════════════════════════════════════════")
+	fmt.Printf("  Opening browser for %s authentication...\n", providerName)
+	fmt.Println("════════════════════════════════════════════════════════════")
+	fmt.Printf("\n  URL: %s\n\n", authURL)
+
+	if err := browser.OpenURL(authURL); err != nil {
+		log.Warnf("Could not open browser automatically: %v", err)
+		fmt.Println("  ⚠ Could not open browser automatically.")
+		fmt.Println("  Please open the URL above in your browser manually.")
+	} else {
+		fmt.Println("  (Browser opened automatically)")
+	}
+
+	fmt.Println("\n  Waiting for authentication callback...")
+
+	// Step 6: Wait for callback
+	callback, err := c.protocolHandler.WaitForCallback(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("failed to receive callback: %w", err)
+	}
+
+	if callback.Error != "" {
+		return nil, fmt.Errorf("authentication error: %s", callback.Error)
+	}
+
+	if callback.State != state {
+		// Log state values for debugging, but don't expose in user-facing error
+		log.Debugf("kiro: OAuth state mismatch - expected %s, got %s", state, callback.State)
+		return nil, fmt.Errorf("OAuth state validation failed - please try again")
+	}
+
+	if callback.Code == "" {
+		return nil, fmt.Errorf("no authorization code received")
+	}
+
+	fmt.Println("\n✓ Authorization received!")
+
+	// Step 7: Exchange code for tokens
+	fmt.Println("Exchanging code for tokens...")
+
+	tokenReq := &CreateTokenRequest{
+		Code:         callback.Code,
+		CodeVerifier: codeVerifier,
+		RedirectURI:  KiroRedirectURI,
+	}
+
+	tokenResp, err := c.CreateToken(ctx, tokenReq)
+	if err != nil {
+		return nil, fmt.Errorf("failed to exchange code for tokens: %w", err)
+	}
+
+	fmt.Println("\n✓ Authentication successful!")
+
+	// Close the browser window
+	if err := browser.CloseBrowser(); err != nil {
+		log.Debugf("Failed to close browser: %v", err)
+	}
+
+	// Validate ExpiresIn - use default 1 hour if invalid
+	expiresIn := tokenResp.ExpiresIn
+	if expiresIn <= 0 {
+		expiresIn = 3600
+	}
+	expiresAt := time.Now().Add(time.Duration(expiresIn) * time.Second)
+
+	// Try to extract email from JWT access token first
+	email := ExtractEmailFromJWT(tokenResp.AccessToken)
+	
+	// If no email in JWT, ask user for account label (only in interactive mode)
+	if email == "" && isInteractiveTerminal() {
+		fmt.Print("\n  Enter account label for file naming (optional, press Enter to skip): ")
+		reader := bufio.NewReader(os.Stdin)
+		var err error
+		email, err = reader.ReadString('\n')
+		if err != nil {
+			log.Debugf("Failed to read account label: %v", err)
+		}
+		email = strings.TrimSpace(email)
+	}
+
+	return &KiroTokenData{
+		AccessToken:  tokenResp.AccessToken,
+		RefreshToken: tokenResp.RefreshToken,
+		ProfileArn:   tokenResp.ProfileArn,
+		ExpiresAt:    expiresAt.Format(time.RFC3339),
+		AuthMethod:   "social",
+		Provider:     providerName,
+		Email:        email, // JWT email or user-provided label
+	}, nil
+}
+
+// LoginWithGoogle performs OAuth login with Google.
+func (c *SocialAuthClient) LoginWithGoogle(ctx context.Context) (*KiroTokenData, error) {
+	return c.LoginWithSocial(ctx, ProviderGoogle)
+}
+
+// LoginWithGitHub performs OAuth login with GitHub.
+func (c *SocialAuthClient) LoginWithGitHub(ctx context.Context) (*KiroTokenData, error) {
+	return c.LoginWithSocial(ctx, ProviderGitHub)
+}
+
+// forceDefaultProtocolHandler sets our protocol handler as the default for kiro:// URLs.
+// This prevents the "Open with" dialog from appearing on Linux.
+// On non-Linux platforms, this is a no-op as they use different mechanisms.
+func forceDefaultProtocolHandler() {
+	if runtime.GOOS != "linux" {
+		return // Non-Linux platforms use different handler mechanisms
+	}
+	
+	// Set our handler as default using xdg-mime
+	cmd := exec.Command("xdg-mime", "default", "kiro-oauth-handler.desktop", "x-scheme-handler/kiro")
+	if err := cmd.Run(); err != nil {
+		log.Warnf("Failed to set default protocol handler: %v. You may see a handler selection dialog.", err)
+	}
+}
+
+// isInteractiveTerminal checks if stdin is connected to an interactive terminal.
+// Returns false in CI/automated environments or when stdin is piped.
+func isInteractiveTerminal() bool {
+	return term.IsTerminal(int(os.Stdin.Fd()))
+}

internal/auth/kiro/sso_oidc.go

@@ -0,0 +1,1371 @@
+// Package kiro provides AWS SSO OIDC authentication for Kiro.
+package kiro
+
+import (
+	"bufio"
+	"context"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"html"
+	"io"
+	"net"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/browser"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	// AWS SSO OIDC endpoints
+	ssoOIDCEndpoint = "https://oidc.us-east-1.amazonaws.com"
+
+	// Kiro's start URL for Builder ID
+	builderIDStartURL = "https://view.awsapps.com/start"
+
+	// Default region for IDC
+	defaultIDCRegion = "us-east-1"
+
+	// Polling interval
+	pollInterval = 5 * time.Second
+
+	// Authorization code flow callback
+	authCodeCallbackPath = "/oauth/callback"
+	authCodeCallbackPort = 19877
+
+	// User-Agent to match official Kiro IDE
+	kiroUserAgent = "KiroIDE"
+
+	// IDC token refresh headers (matching Kiro IDE behavior)
+	idcAmzUserAgent = "aws-sdk-js/3.738.0 ua/2.1 os/other lang/js md/browser#unknown_unknown api/sso-oidc#3.738.0 m/E KiroIDE"
+)
+
+// Sentinel errors for OIDC token polling
+var (
+	ErrAuthorizationPending = errors.New("authorization_pending")
+	ErrSlowDown             = errors.New("slow_down")
+)
+
+// SSOOIDCClient handles AWS SSO OIDC authentication.
+type SSOOIDCClient struct {
+	httpClient *http.Client
+	cfg        *config.Config
+}
+
+// NewSSOOIDCClient creates a new SSO OIDC client.
+func NewSSOOIDCClient(cfg *config.Config) *SSOOIDCClient {
+	client := &http.Client{Timeout: 30 * time.Second}
+	if cfg != nil {
+		client = util.SetProxy(&cfg.SDKConfig, client)
+	}
+	return &SSOOIDCClient{
+		httpClient: client,
+		cfg:        cfg,
+	}
+}
+
+// RegisterClientResponse from AWS SSO OIDC.
+type RegisterClientResponse struct {
+	ClientID                string `json:"clientId"`
+	ClientSecret            string `json:"clientSecret"`
+	ClientIDIssuedAt        int64  `json:"clientIdIssuedAt"`
+	ClientSecretExpiresAt   int64  `json:"clientSecretExpiresAt"`
+}
+
+// StartDeviceAuthResponse from AWS SSO OIDC.
+type StartDeviceAuthResponse struct {
+	DeviceCode              string `json:"deviceCode"`
+	UserCode                string `json:"userCode"`
+	VerificationURI         string `json:"verificationUri"`
+	VerificationURIComplete string `json:"verificationUriComplete"`
+	ExpiresIn               int    `json:"expiresIn"`
+	Interval                int    `json:"interval"`
+}
+
+// CreateTokenResponse from AWS SSO OIDC.
+type CreateTokenResponse struct {
+	AccessToken  string `json:"accessToken"`
+	TokenType    string `json:"tokenType"`
+	ExpiresIn    int    `json:"expiresIn"`
+	RefreshToken string `json:"refreshToken"`
+}
+
+// getOIDCEndpoint returns the OIDC endpoint for the given region.
+func getOIDCEndpoint(region string) string {
+	if region == "" {
+		region = defaultIDCRegion
+	}
+	return fmt.Sprintf("https://oidc.%s.amazonaws.com", region)
+}
+
+// promptInput prompts the user for input with an optional default value.
+func promptInput(prompt, defaultValue string) string {
+	reader := bufio.NewReader(os.Stdin)
+	if defaultValue != "" {
+		fmt.Printf("%s [%s]: ", prompt, defaultValue)
+	} else {
+		fmt.Printf("%s: ", prompt)
+	}
+	input, err := reader.ReadString('\n')
+	if err != nil {
+		log.Warnf("Error reading input: %v", err)
+		return defaultValue
+	}
+	input = strings.TrimSpace(input)
+	if input == "" {
+		return defaultValue
+	}
+	return input
+}
+
+// promptSelect prompts the user to select from options using number input.
+func promptSelect(prompt string, options []string) int {
+	reader := bufio.NewReader(os.Stdin)
+
+	for {
+		fmt.Println(prompt)
+		for i, opt := range options {
+			fmt.Printf("  %d) %s\n", i+1, opt)
+		}
+		fmt.Printf("Enter selection (1-%d): ", len(options))
+
+		input, err := reader.ReadString('\n')
+		if err != nil {
+			log.Warnf("Error reading input: %v", err)
+			return 0 // Default to first option on error
+		}
+		input = strings.TrimSpace(input)
+
+		// Parse the selection
+		var selection int
+		if _, err := fmt.Sscanf(input, "%d", &selection); err != nil || selection < 1 || selection > len(options) {
+			fmt.Printf("Invalid selection '%s'. Please enter a number between 1 and %d.\n\n", input, len(options))
+			continue
+		}
+		return selection - 1
+	}
+}
+
+// RegisterClientWithRegion registers a new OIDC client with AWS using a specific region.
+func (c *SSOOIDCClient) RegisterClientWithRegion(ctx context.Context, region string) (*RegisterClientResponse, error) {
+	endpoint := getOIDCEndpoint(region)
+
+	payload := map[string]interface{}{
+		"clientName": "Kiro IDE",
+		"clientType": "public",
+		"scopes":     []string{"codewhisperer:completions", "codewhisperer:analysis", "codewhisperer:conversations", "codewhisperer:transformations", "codewhisperer:taskassist"},
+		"grantTypes": []string{"urn:ietf:params:oauth:grant-type:device_code", "refresh_token"},
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint+"/client/register", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("register client failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("register client failed (status %d)", resp.StatusCode)
+	}
+
+	var result RegisterClientResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// StartDeviceAuthorizationWithIDC starts the device authorization flow for IDC.
+func (c *SSOOIDCClient) StartDeviceAuthorizationWithIDC(ctx context.Context, clientID, clientSecret, startURL, region string) (*StartDeviceAuthResponse, error) {
+	endpoint := getOIDCEndpoint(region)
+
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"startUrl":     startURL,
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint+"/device_authorization", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("start device auth failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("start device auth failed (status %d)", resp.StatusCode)
+	}
+
+	var result StartDeviceAuthResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// CreateTokenWithRegion polls for the access token after user authorization using a specific region.
+func (c *SSOOIDCClient) CreateTokenWithRegion(ctx context.Context, clientID, clientSecret, deviceCode, region string) (*CreateTokenResponse, error) {
+	endpoint := getOIDCEndpoint(region)
+
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"deviceCode":   deviceCode,
+		"grantType":    "urn:ietf:params:oauth:grant-type:device_code",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint+"/token", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	// Check for pending authorization
+	if resp.StatusCode == http.StatusBadRequest {
+		var errResp struct {
+			Error string `json:"error"`
+		}
+		if json.Unmarshal(respBody, &errResp) == nil {
+			if errResp.Error == "authorization_pending" {
+				return nil, ErrAuthorizationPending
+			}
+			if errResp.Error == "slow_down" {
+				return nil, ErrSlowDown
+			}
+		}
+		log.Debugf("create token failed: %s", string(respBody))
+		return nil, fmt.Errorf("create token failed")
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("create token failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("create token failed (status %d)", resp.StatusCode)
+	}
+
+	var result CreateTokenResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// RefreshTokenWithRegion refreshes an access token using the refresh token with a specific region.
+func (c *SSOOIDCClient) RefreshTokenWithRegion(ctx context.Context, clientID, clientSecret, refreshToken, region, startURL string) (*KiroTokenData, error) {
+	endpoint := getOIDCEndpoint(region)
+
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"refreshToken": refreshToken,
+		"grantType":    "refresh_token",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint+"/token", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+
+	// Set headers matching kiro2api's IDC token refresh
+	// These headers are required for successful IDC token refresh
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Host", fmt.Sprintf("oidc.%s.amazonaws.com", region))
+	req.Header.Set("Connection", "keep-alive")
+	req.Header.Set("x-amz-user-agent", idcAmzUserAgent)
+	req.Header.Set("Accept", "*/*")
+	req.Header.Set("Accept-Language", "*")
+	req.Header.Set("sec-fetch-mode", "cors")
+	req.Header.Set("User-Agent", "node")
+	req.Header.Set("Accept-Encoding", "br, gzip, deflate")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Warnf("IDC token refresh failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("token refresh failed (status %d)", resp.StatusCode)
+	}
+
+	var result CreateTokenResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	expiresAt := time.Now().Add(time.Duration(result.ExpiresIn) * time.Second)
+
+	return &KiroTokenData{
+		AccessToken:  result.AccessToken,
+		RefreshToken: result.RefreshToken,
+		ExpiresAt:    expiresAt.Format(time.RFC3339),
+		AuthMethod:   "idc",
+		Provider:     "AWS",
+		ClientID:     clientID,
+		ClientSecret: clientSecret,
+		StartURL:     startURL,
+		Region:       region,
+	}, nil
+}
+
+// LoginWithIDC performs the full device code flow for AWS Identity Center (IDC).
+func (c *SSOOIDCClient) LoginWithIDC(ctx context.Context, startURL, region string) (*KiroTokenData, error) {
+	fmt.Println("\n╔══════════════════════════════════════════════════════════╗")
+	fmt.Println("║       Kiro Authentication (AWS Identity Center)          ║")
+	fmt.Println("╚══════════════════════════════════════════════════════════╝")
+
+	// Step 1: Register client with the specified region
+	fmt.Println("\nRegistering client...")
+	regResp, err := c.RegisterClientWithRegion(ctx, region)
+	if err != nil {
+		return nil, fmt.Errorf("failed to register client: %w", err)
+	}
+	log.Debugf("Client registered: %s", regResp.ClientID)
+
+	// Step 2: Start device authorization with IDC start URL
+	fmt.Println("Starting device authorization...")
+	authResp, err := c.StartDeviceAuthorizationWithIDC(ctx, regResp.ClientID, regResp.ClientSecret, startURL, region)
+	if err != nil {
+		return nil, fmt.Errorf("failed to start device auth: %w", err)
+	}
+
+	// Step 3: Show user the verification URL
+	fmt.Printf("\n")
+	fmt.Println("════════════════════════════════════════════════════════════")
+	fmt.Printf("  Confirm the following code in the browser:\n")
+	fmt.Printf("  Code: %s\n", authResp.UserCode)
+	fmt.Println("════════════════════════════════════════════════════════════")
+	fmt.Printf("\n  Open this URL: %s\n\n", authResp.VerificationURIComplete)
+
+	// Set incognito mode based on config
+	if c.cfg != nil {
+		browser.SetIncognitoMode(c.cfg.IncognitoBrowser)
+		if !c.cfg.IncognitoBrowser {
+			log.Info("kiro: using normal browser mode (--no-incognito). Note: You may not be able to select a different account.")
+		} else {
+			log.Debug("kiro: using incognito mode for multi-account support")
+		}
+	} else {
+		browser.SetIncognitoMode(true)
+		log.Debug("kiro: using incognito mode for multi-account support (default)")
+	}
+
+	// Open browser
+	if err := browser.OpenURL(authResp.VerificationURIComplete); err != nil {
+		log.Warnf("Could not open browser automatically: %v", err)
+		fmt.Println("  Please open the URL manually in your browser.")
+	} else {
+		fmt.Println("  (Browser opened automatically)")
+	}
+
+	// Step 4: Poll for token
+	fmt.Println("Waiting for authorization...")
+
+	interval := pollInterval
+	if authResp.Interval > 0 {
+		interval = time.Duration(authResp.Interval) * time.Second
+	}
+
+	deadline := time.Now().Add(time.Duration(authResp.ExpiresIn) * time.Second)
+
+	for time.Now().Before(deadline) {
+		select {
+		case <-ctx.Done():
+			browser.CloseBrowser()
+			return nil, ctx.Err()
+		case <-time.After(interval):
+			tokenResp, err := c.CreateTokenWithRegion(ctx, regResp.ClientID, regResp.ClientSecret, authResp.DeviceCode, region)
+			if err != nil {
+				if errors.Is(err, ErrAuthorizationPending) {
+					fmt.Print(".")
+					continue
+				}
+				if errors.Is(err, ErrSlowDown) {
+					interval += 5 * time.Second
+					continue
+				}
+				browser.CloseBrowser()
+				return nil, fmt.Errorf("token creation failed: %w", err)
+			}
+
+			fmt.Println("\n\n✓ Authorization successful!")
+
+			// Close the browser window
+			if err := browser.CloseBrowser(); err != nil {
+				log.Debugf("Failed to close browser: %v", err)
+			}
+
+			// Step 5: Get profile ARN from CodeWhisperer API
+			fmt.Println("Fetching profile information...")
+			profileArn := c.fetchProfileArn(ctx, tokenResp.AccessToken)
+
+			// Fetch user email
+			email := FetchUserEmailWithFallback(ctx, c.cfg, tokenResp.AccessToken)
+			if email != "" {
+				fmt.Printf("  Logged in as: %s\n", email)
+			}
+
+			expiresAt := time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
+
+			return &KiroTokenData{
+				AccessToken:  tokenResp.AccessToken,
+				RefreshToken: tokenResp.RefreshToken,
+				ProfileArn:   profileArn,
+				ExpiresAt:    expiresAt.Format(time.RFC3339),
+				AuthMethod:   "idc",
+				Provider:     "AWS",
+				ClientID:     regResp.ClientID,
+				ClientSecret: regResp.ClientSecret,
+				Email:        email,
+				StartURL:     startURL,
+				Region:       region,
+			}, nil
+		}
+	}
+
+	// Close browser on timeout
+	if err := browser.CloseBrowser(); err != nil {
+		log.Debugf("Failed to close browser on timeout: %v", err)
+	}
+	return nil, fmt.Errorf("authorization timed out")
+}
+
+// LoginWithMethodSelection prompts the user to select between Builder ID and IDC, then performs the login.
+func (c *SSOOIDCClient) LoginWithMethodSelection(ctx context.Context) (*KiroTokenData, error) {
+	fmt.Println("\n╔══════════════════════════════════════════════════════════╗")
+	fmt.Println("║              Kiro Authentication (AWS)                    ║")
+	fmt.Println("╚══════════════════════════════════════════════════════════╝")
+
+	// Prompt for login method
+	options := []string{
+		"Use with Builder ID (personal AWS account)",
+		"Use with IDC Account (organization SSO)",
+	}
+	selection := promptSelect("\n? Select login method:", options)
+
+	if selection == 0 {
+		// Builder ID flow - use existing implementation
+		return c.LoginWithBuilderID(ctx)
+	}
+
+	// IDC flow - prompt for start URL and region
+	fmt.Println()
+	startURL := promptInput("? Enter Start URL", "")
+	if startURL == "" {
+		return nil, fmt.Errorf("start URL is required for IDC login")
+	}
+
+	region := promptInput("? Enter Region", defaultIDCRegion)
+
+	return c.LoginWithIDC(ctx, startURL, region)
+}
+
+// RegisterClient registers a new OIDC client with AWS.
+func (c *SSOOIDCClient) RegisterClient(ctx context.Context) (*RegisterClientResponse, error) {
+	payload := map[string]interface{}{
+		"clientName": "Kiro IDE",
+		"clientType": "public",
+		"scopes":     []string{"codewhisperer:completions", "codewhisperer:analysis", "codewhisperer:conversations", "codewhisperer:transformations", "codewhisperer:taskassist"},
+		"grantTypes": []string{"urn:ietf:params:oauth:grant-type:device_code", "refresh_token"},
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, ssoOIDCEndpoint+"/client/register", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("register client failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("register client failed (status %d)", resp.StatusCode)
+	}
+
+	var result RegisterClientResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// StartDeviceAuthorization starts the device authorization flow.
+func (c *SSOOIDCClient) StartDeviceAuthorization(ctx context.Context, clientID, clientSecret string) (*StartDeviceAuthResponse, error) {
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"startUrl":     builderIDStartURL,
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, ssoOIDCEndpoint+"/device_authorization", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("start device auth failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("start device auth failed (status %d)", resp.StatusCode)
+	}
+
+	var result StartDeviceAuthResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// CreateToken polls for the access token after user authorization.
+func (c *SSOOIDCClient) CreateToken(ctx context.Context, clientID, clientSecret, deviceCode string) (*CreateTokenResponse, error) {
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"deviceCode":   deviceCode,
+		"grantType":    "urn:ietf:params:oauth:grant-type:device_code",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, ssoOIDCEndpoint+"/token", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	// Check for pending authorization
+	if resp.StatusCode == http.StatusBadRequest {
+		var errResp struct {
+			Error string `json:"error"`
+		}
+		if json.Unmarshal(respBody, &errResp) == nil {
+			if errResp.Error == "authorization_pending" {
+				return nil, ErrAuthorizationPending
+			}
+			if errResp.Error == "slow_down" {
+				return nil, ErrSlowDown
+			}
+		}
+		log.Debugf("create token failed: %s", string(respBody))
+		return nil, fmt.Errorf("create token failed")
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("create token failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("create token failed (status %d)", resp.StatusCode)
+	}
+
+	var result CreateTokenResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// RefreshToken refreshes an access token using the refresh token.
+func (c *SSOOIDCClient) RefreshToken(ctx context.Context, clientID, clientSecret, refreshToken string) (*KiroTokenData, error) {
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"refreshToken": refreshToken,
+		"grantType":    "refresh_token",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, ssoOIDCEndpoint+"/token", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("token refresh failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("token refresh failed (status %d)", resp.StatusCode)
+	}
+
+	var result CreateTokenResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	expiresAt := time.Now().Add(time.Duration(result.ExpiresIn) * time.Second)
+
+	return &KiroTokenData{
+		AccessToken:  result.AccessToken,
+		RefreshToken: result.RefreshToken,
+		ExpiresAt:    expiresAt.Format(time.RFC3339),
+		AuthMethod:   "builder-id",
+		Provider:     "AWS",
+		ClientID:     clientID,
+		ClientSecret: clientSecret,
+	}, nil
+}
+
+// LoginWithBuilderID performs the full device code flow for AWS Builder ID.
+func (c *SSOOIDCClient) LoginWithBuilderID(ctx context.Context) (*KiroTokenData, error) {
+	fmt.Println("\n╔══════════════════════════════════════════════════════════╗")
+	fmt.Println("║         Kiro Authentication (AWS Builder ID)              ║")
+	fmt.Println("╚══════════════════════════════════════════════════════════╝")
+
+	// Step 1: Register client
+	fmt.Println("\nRegistering client...")
+	regResp, err := c.RegisterClient(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("failed to register client: %w", err)
+	}
+	log.Debugf("Client registered: %s", regResp.ClientID)
+
+	// Step 2: Start device authorization
+	fmt.Println("Starting device authorization...")
+	authResp, err := c.StartDeviceAuthorization(ctx, regResp.ClientID, regResp.ClientSecret)
+	if err != nil {
+		return nil, fmt.Errorf("failed to start device auth: %w", err)
+	}
+
+	// Step 3: Show user the verification URL
+	fmt.Printf("\n")
+	fmt.Println("════════════════════════════════════════════════════════════")
+	fmt.Printf("  Open this URL in your browser:\n")
+	fmt.Printf("  %s\n", authResp.VerificationURIComplete)
+	fmt.Println("════════════════════════════════════════════════════════════")
+	fmt.Printf("\n  Or go to: %s\n", authResp.VerificationURI)
+	fmt.Printf("  And enter code: %s\n\n", authResp.UserCode)
+
+	// Set incognito mode based on config (defaults to true for Kiro, can be overridden with --no-incognito)
+	// Incognito mode enables multi-account support by bypassing cached sessions
+	if c.cfg != nil {
+		browser.SetIncognitoMode(c.cfg.IncognitoBrowser)
+		if !c.cfg.IncognitoBrowser {
+			log.Info("kiro: using normal browser mode (--no-incognito). Note: You may not be able to select a different account.")
+		} else {
+			log.Debug("kiro: using incognito mode for multi-account support")
+		}
+	} else {
+		browser.SetIncognitoMode(true) // Default to incognito if no config
+		log.Debug("kiro: using incognito mode for multi-account support (default)")
+	}
+
+	// Open browser using cross-platform browser package
+	if err := browser.OpenURL(authResp.VerificationURIComplete); err != nil {
+		log.Warnf("Could not open browser automatically: %v", err)
+		fmt.Println("  Please open the URL manually in your browser.")
+	} else {
+		fmt.Println("  (Browser opened automatically)")
+	}
+
+	// Step 4: Poll for token
+	fmt.Println("Waiting for authorization...")
+
+	interval := pollInterval
+	if authResp.Interval > 0 {
+		interval = time.Duration(authResp.Interval) * time.Second
+	}
+
+	deadline := time.Now().Add(time.Duration(authResp.ExpiresIn) * time.Second)
+
+	for time.Now().Before(deadline) {
+		select {
+		case <-ctx.Done():
+			browser.CloseBrowser() // Cleanup on cancel
+			return nil, ctx.Err()
+		case <-time.After(interval):
+			tokenResp, err := c.CreateToken(ctx, regResp.ClientID, regResp.ClientSecret, authResp.DeviceCode)
+			if err != nil {
+				if errors.Is(err, ErrAuthorizationPending) {
+					fmt.Print(".")
+					continue
+				}
+				if errors.Is(err, ErrSlowDown) {
+					interval += 5 * time.Second
+					continue
+				}
+				// Close browser on error before returning
+				browser.CloseBrowser()
+				return nil, fmt.Errorf("token creation failed: %w", err)
+			}
+
+			fmt.Println("\n\n✓ Authorization successful!")
+
+			// Close the browser window
+			if err := browser.CloseBrowser(); err != nil {
+				log.Debugf("Failed to close browser: %v", err)
+			}
+
+			// Step 5: Get profile ARN from CodeWhisperer API
+			fmt.Println("Fetching profile information...")
+			profileArn := c.fetchProfileArn(ctx, tokenResp.AccessToken)
+
+			// Fetch user email (tries CodeWhisperer API first, then userinfo endpoint, then JWT parsing)
+			email := FetchUserEmailWithFallback(ctx, c.cfg, tokenResp.AccessToken)
+			if email != "" {
+				fmt.Printf("  Logged in as: %s\n", email)
+			}
+
+			expiresAt := time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
+
+			return &KiroTokenData{
+				AccessToken:  tokenResp.AccessToken,
+				RefreshToken: tokenResp.RefreshToken,
+				ProfileArn:   profileArn,
+				ExpiresAt:    expiresAt.Format(time.RFC3339),
+				AuthMethod:   "builder-id",
+				Provider:     "AWS",
+				ClientID:     regResp.ClientID,
+				ClientSecret: regResp.ClientSecret,
+				Email:        email,
+			}, nil
+		}
+	}
+
+	// Close browser on timeout for better UX
+	if err := browser.CloseBrowser(); err != nil {
+		log.Debugf("Failed to close browser on timeout: %v", err)
+	}
+	return nil, fmt.Errorf("authorization timed out")
+}
+
+// FetchUserEmail retrieves the user's email from AWS SSO OIDC userinfo endpoint.
+// Falls back to JWT parsing if userinfo fails.
+func (c *SSOOIDCClient) FetchUserEmail(ctx context.Context, accessToken string) string {
+	// Method 1: Try userinfo endpoint (standard OIDC)
+	email := c.tryUserInfoEndpoint(ctx, accessToken)
+	if email != "" {
+		return email
+	}
+
+	// Method 2: Fallback to JWT parsing
+	return ExtractEmailFromJWT(accessToken)
+}
+
+// tryUserInfoEndpoint attempts to get user info from AWS SSO OIDC userinfo endpoint.
+func (c *SSOOIDCClient) tryUserInfoEndpoint(ctx context.Context, accessToken string) string {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, ssoOIDCEndpoint+"/userinfo", nil)
+	if err != nil {
+		return ""
+	}
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		log.Debugf("userinfo request failed: %v", err)
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		respBody, _ := io.ReadAll(resp.Body)
+		log.Debugf("userinfo endpoint returned status %d: %s", resp.StatusCode, string(respBody))
+		return ""
+	}
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return ""
+	}
+
+	log.Debugf("userinfo response: %s", string(respBody))
+
+	var userInfo struct {
+		Email             string `json:"email"`
+		Sub               string `json:"sub"`
+		PreferredUsername string `json:"preferred_username"`
+		Name              string `json:"name"`
+	}
+
+	if err := json.Unmarshal(respBody, &userInfo); err != nil {
+		return ""
+	}
+
+	if userInfo.Email != "" {
+		return userInfo.Email
+	}
+	if userInfo.PreferredUsername != "" && strings.Contains(userInfo.PreferredUsername, "@") {
+		return userInfo.PreferredUsername
+	}
+	return ""
+}
+
+// fetchProfileArn retrieves the profile ARN from CodeWhisperer API.
+// This is needed for file naming since AWS SSO OIDC doesn't return profile info.
+func (c *SSOOIDCClient) fetchProfileArn(ctx context.Context, accessToken string) string {
+	// Try ListProfiles API first
+	profileArn := c.tryListProfiles(ctx, accessToken)
+	if profileArn != "" {
+		return profileArn
+	}
+
+	// Fallback: Try ListAvailableCustomizations
+	return c.tryListCustomizations(ctx, accessToken)
+}
+
+func (c *SSOOIDCClient) tryListProfiles(ctx context.Context, accessToken string) string {
+	payload := map[string]interface{}{
+		"origin": "AI_EDITOR",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return ""
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, "https://codewhisperer.us-east-1.amazonaws.com", strings.NewReader(string(body)))
+	if err != nil {
+		return ""
+	}
+
+	req.Header.Set("Content-Type", "application/x-amz-json-1.0")
+	req.Header.Set("x-amz-target", "AmazonCodeWhispererService.ListProfiles")
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	respBody, _ := io.ReadAll(resp.Body)
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("ListProfiles failed (status %d): %s", resp.StatusCode, string(respBody))
+		return ""
+	}
+
+	log.Debugf("ListProfiles response: %s", string(respBody))
+
+	var result struct {
+		Profiles []struct {
+			Arn string `json:"arn"`
+		} `json:"profiles"`
+		ProfileArn string `json:"profileArn"`
+	}
+
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return ""
+	}
+
+	if result.ProfileArn != "" {
+		return result.ProfileArn
+	}
+
+	if len(result.Profiles) > 0 {
+		return result.Profiles[0].Arn
+	}
+
+	return ""
+}
+
+func (c *SSOOIDCClient) tryListCustomizations(ctx context.Context, accessToken string) string {
+	payload := map[string]interface{}{
+		"origin": "AI_EDITOR",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return ""
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, "https://codewhisperer.us-east-1.amazonaws.com", strings.NewReader(string(body)))
+	if err != nil {
+		return ""
+	}
+
+	req.Header.Set("Content-Type", "application/x-amz-json-1.0")
+	req.Header.Set("x-amz-target", "AmazonCodeWhispererService.ListAvailableCustomizations")
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	respBody, _ := io.ReadAll(resp.Body)
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("ListAvailableCustomizations failed (status %d): %s", resp.StatusCode, string(respBody))
+		return ""
+	}
+
+	log.Debugf("ListAvailableCustomizations response: %s", string(respBody))
+
+	var result struct {
+		Customizations []struct {
+			Arn string `json:"arn"`
+		} `json:"customizations"`
+		ProfileArn string `json:"profileArn"`
+	}
+
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return ""
+	}
+
+	if result.ProfileArn != "" {
+		return result.ProfileArn
+	}
+
+	if len(result.Customizations) > 0 {
+		return result.Customizations[0].Arn
+	}
+
+	return ""
+}
+
+// RegisterClientForAuthCode registers a new OIDC client for authorization code flow.
+func (c *SSOOIDCClient) RegisterClientForAuthCode(ctx context.Context, redirectURI string) (*RegisterClientResponse, error) {
+	payload := map[string]interface{}{
+		"clientName":   "Kiro IDE",
+		"clientType":   "public",
+		"scopes":       []string{"codewhisperer:completions", "codewhisperer:analysis", "codewhisperer:conversations", "codewhisperer:transformations", "codewhisperer:taskassist"},
+		"grantTypes":   []string{"authorization_code", "refresh_token"},
+		"redirectUris": []string{redirectURI},
+		"issuerUrl":    builderIDStartURL,
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, ssoOIDCEndpoint+"/client/register", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("register client for auth code failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("register client failed (status %d)", resp.StatusCode)
+	}
+
+	var result RegisterClientResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// AuthCodeCallbackResult contains the result from authorization code callback.
+type AuthCodeCallbackResult struct {
+	Code  string
+	State string
+	Error string
+}
+
+// startAuthCodeCallbackServer starts a local HTTP server to receive the authorization code callback.
+func (c *SSOOIDCClient) startAuthCodeCallbackServer(ctx context.Context, expectedState string) (string, <-chan AuthCodeCallbackResult, error) {
+	// Try to find an available port
+	listener, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", authCodeCallbackPort))
+	if err != nil {
+		// Try with dynamic port
+		log.Warnf("sso oidc: default port %d is busy, falling back to dynamic port", authCodeCallbackPort)
+		listener, err = net.Listen("tcp", "127.0.0.1:0")
+		if err != nil {
+			return "", nil, fmt.Errorf("failed to start callback server: %w", err)
+		}
+	}
+
+	port := listener.Addr().(*net.TCPAddr).Port
+	redirectURI := fmt.Sprintf("http://127.0.0.1:%d%s", port, authCodeCallbackPath)
+	resultChan := make(chan AuthCodeCallbackResult, 1)
+
+	server := &http.Server{
+		ReadHeaderTimeout: 10 * time.Second,
+	}
+
+	mux := http.NewServeMux()
+	mux.HandleFunc(authCodeCallbackPath, func(w http.ResponseWriter, r *http.Request) {
+		code := r.URL.Query().Get("code")
+		state := r.URL.Query().Get("state")
+		errParam := r.URL.Query().Get("error")
+
+		// Send response to browser
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		if errParam != "" {
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprintf(w, `<!DOCTYPE html>
+<html><head><title>Login Failed</title></head>
+<body><h1>Login Failed</h1><p>Error: %s</p><p>You can close this window.</p></body></html>`, html.EscapeString(errParam))
+			resultChan <- AuthCodeCallbackResult{Error: errParam}
+			return
+		}
+
+		if state != expectedState {
+			w.WriteHeader(http.StatusBadRequest)
+			fmt.Fprint(w, `<!DOCTYPE html>
+<html><head><title>Login Failed</title></head>
+<body><h1>Login Failed</h1><p>Invalid state parameter</p><p>You can close this window.</p></body></html>`)
+			resultChan <- AuthCodeCallbackResult{Error: "state mismatch"}
+			return
+		}
+
+		fmt.Fprint(w, `<!DOCTYPE html>
+<html><head><title>Login Successful</title></head>
+<body><h1>Login Successful!</h1><p>You can close this window and return to the terminal.</p>
+<script>window.close();</script></body></html>`)
+		resultChan <- AuthCodeCallbackResult{Code: code, State: state}
+	})
+
+	server.Handler = mux
+
+	go func() {
+		if err := server.Serve(listener); err != nil && err != http.ErrServerClosed {
+			log.Debugf("auth code callback server error: %v", err)
+		}
+	}()
+
+	go func() {
+		select {
+		case <-ctx.Done():
+		case <-time.After(10 * time.Minute):
+		case <-resultChan:
+		}
+		_ = server.Shutdown(context.Background())
+	}()
+
+	return redirectURI, resultChan, nil
+}
+
+// generatePKCEForAuthCode generates PKCE code verifier and challenge for authorization code flow.
+func generatePKCEForAuthCode() (verifier, challenge string, err error) {
+	b := make([]byte, 32)
+	if _, err := rand.Read(b); err != nil {
+		return "", "", fmt.Errorf("failed to generate random bytes: %w", err)
+	}
+	verifier = base64.RawURLEncoding.EncodeToString(b)
+	h := sha256.Sum256([]byte(verifier))
+	challenge = base64.RawURLEncoding.EncodeToString(h[:])
+	return verifier, challenge, nil
+}
+
+// generateStateForAuthCode generates a random state parameter.
+func generateStateForAuthCode() (string, error) {
+	b := make([]byte, 16)
+	if _, err := rand.Read(b); err != nil {
+		return "", err
+	}
+	return base64.RawURLEncoding.EncodeToString(b), nil
+}
+
+// CreateTokenWithAuthCode exchanges authorization code for tokens.
+func (c *SSOOIDCClient) CreateTokenWithAuthCode(ctx context.Context, clientID, clientSecret, code, codeVerifier, redirectURI string) (*CreateTokenResponse, error) {
+	payload := map[string]string{
+		"clientId":     clientID,
+		"clientSecret": clientSecret,
+		"code":         code,
+		"codeVerifier": codeVerifier,
+		"redirectUri":  redirectURI,
+		"grantType":    "authorization_code",
+	}
+
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, ssoOIDCEndpoint+"/token", strings.NewReader(string(body)))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("User-Agent", kiroUserAgent)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		log.Debugf("create token with auth code failed (status %d): %s", resp.StatusCode, string(respBody))
+		return nil, fmt.Errorf("create token failed (status %d)", resp.StatusCode)
+	}
+
+	var result CreateTokenResponse
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// LoginWithBuilderIDAuthCode performs the authorization code flow for AWS Builder ID.
+// This provides a better UX than device code flow as it uses automatic browser callback.
+func (c *SSOOIDCClient) LoginWithBuilderIDAuthCode(ctx context.Context) (*KiroTokenData, error) {
+	fmt.Println("\n╔══════════════════════════════════════════════════════════╗")
+	fmt.Println("║     Kiro Authentication (AWS Builder ID - Auth Code)      ║")
+	fmt.Println("╚══════════════════════════════════════════════════════════╝")
+
+	// Step 1: Generate PKCE and state
+	codeVerifier, codeChallenge, err := generatePKCEForAuthCode()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate PKCE: %w", err)
+	}
+
+	state, err := generateStateForAuthCode()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate state: %w", err)
+	}
+
+	// Step 2: Start callback server
+	fmt.Println("\nStarting callback server...")
+	redirectURI, resultChan, err := c.startAuthCodeCallbackServer(ctx, state)
+	if err != nil {
+		return nil, fmt.Errorf("failed to start callback server: %w", err)
+	}
+	log.Debugf("Callback server started, redirect URI: %s", redirectURI)
+
+	// Step 3: Register client with auth code grant type
+	fmt.Println("Registering client...")
+	regResp, err := c.RegisterClientForAuthCode(ctx, redirectURI)
+	if err != nil {
+		return nil, fmt.Errorf("failed to register client: %w", err)
+	}
+	log.Debugf("Client registered: %s", regResp.ClientID)
+
+	// Step 4: Build authorization URL
+	scopes := "codewhisperer:completions,codewhisperer:analysis,codewhisperer:conversations"
+	authURL := fmt.Sprintf("%s/authorize?response_type=code&client_id=%s&redirect_uri=%s&scopes=%s&state=%s&code_challenge=%s&code_challenge_method=S256",
+		ssoOIDCEndpoint,
+		regResp.ClientID,
+		redirectURI,
+		scopes,
+		state,
+		codeChallenge,
+	)
+
+	// Step 5: Open browser
+	fmt.Println("\n════════════════════════════════════════════════════════════")
+	fmt.Println("  Opening browser for authentication...")
+	fmt.Println("════════════════════════════════════════════════════════════")
+	fmt.Printf("\n  URL: %s\n\n", authURL)
+
+	// Set incognito mode
+	if c.cfg != nil {
+		browser.SetIncognitoMode(c.cfg.IncognitoBrowser)
+	} else {
+		browser.SetIncognitoMode(true)
+	}
+
+	if err := browser.OpenURL(authURL); err != nil {
+		log.Warnf("Could not open browser automatically: %v", err)
+		fmt.Println("  ⚠ Could not open browser automatically.")
+		fmt.Println("  Please open the URL above in your browser manually.")
+	} else {
+		fmt.Println("  (Browser opened automatically)")
+	}
+
+	fmt.Println("\n  Waiting for authorization callback...")
+
+	// Step 6: Wait for callback
+	select {
+	case <-ctx.Done():
+		browser.CloseBrowser()
+		return nil, ctx.Err()
+	case <-time.After(10 * time.Minute):
+		browser.CloseBrowser()
+		return nil, fmt.Errorf("authorization timed out")
+	case result := <-resultChan:
+		if result.Error != "" {
+			browser.CloseBrowser()
+			return nil, fmt.Errorf("authorization failed: %s", result.Error)
+		}
+
+		fmt.Println("\n✓ Authorization received!")
+
+		// Close browser
+		if err := browser.CloseBrowser(); err != nil {
+			log.Debugf("Failed to close browser: %v", err)
+		}
+
+		// Step 7: Exchange code for tokens
+		fmt.Println("Exchanging code for tokens...")
+		tokenResp, err := c.CreateTokenWithAuthCode(ctx, regResp.ClientID, regResp.ClientSecret, result.Code, codeVerifier, redirectURI)
+		if err != nil {
+			return nil, fmt.Errorf("failed to exchange code for tokens: %w", err)
+		}
+
+		fmt.Println("\n✓ Authentication successful!")
+
+		// Step 8: Get profile ARN
+		fmt.Println("Fetching profile information...")
+		profileArn := c.fetchProfileArn(ctx, tokenResp.AccessToken)
+
+		// Fetch user email (tries CodeWhisperer API first, then userinfo endpoint, then JWT parsing)
+		email := FetchUserEmailWithFallback(ctx, c.cfg, tokenResp.AccessToken)
+		if email != "" {
+			fmt.Printf("  Logged in as: %s\n", email)
+		}
+
+		expiresAt := time.Now().Add(time.Duration(tokenResp.ExpiresIn) * time.Second)
+
+		return &KiroTokenData{
+			AccessToken:  tokenResp.AccessToken,
+			RefreshToken: tokenResp.RefreshToken,
+			ProfileArn:   profileArn,
+			ExpiresAt:    expiresAt.Format(time.RFC3339),
+			AuthMethod:   "builder-id",
+			Provider:     "AWS",
+			ClientID:     regResp.ClientID,
+			ClientSecret: regResp.ClientSecret,
+			Email:        email,
+		}, nil
+	}
+}

internal/auth/kiro/token.go

@@ -0,0 +1,72 @@
+package kiro
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// KiroTokenStorage holds the persistent token data for Kiro authentication.
+type KiroTokenStorage struct {
+	// AccessToken is the OAuth2 access token for API access
+	AccessToken string `json:"access_token"`
+	// RefreshToken is used to obtain new access tokens
+	RefreshToken string `json:"refresh_token"`
+	// ProfileArn is the AWS CodeWhisperer profile ARN
+	ProfileArn string `json:"profile_arn"`
+	// ExpiresAt is the timestamp when the token expires
+	ExpiresAt string `json:"expires_at"`
+	// AuthMethod indicates the authentication method used
+	AuthMethod string `json:"auth_method"`
+	// Provider indicates the OAuth provider
+	Provider string `json:"provider"`
+	// LastRefresh is the timestamp of the last token refresh
+	LastRefresh string `json:"last_refresh"`
+}
+
+// SaveTokenToFile persists the token storage to the specified file path.
+func (s *KiroTokenStorage) SaveTokenToFile(authFilePath string) error {
+	dir := filepath.Dir(authFilePath)
+	if err := os.MkdirAll(dir, 0700); err != nil {
+		return fmt.Errorf("failed to create directory: %w", err)
+	}
+
+	data, err := json.MarshalIndent(s, "", "  ")
+	if err != nil {
+		return fmt.Errorf("failed to marshal token storage: %w", err)
+	}
+
+	if err := os.WriteFile(authFilePath, data, 0600); err != nil {
+		return fmt.Errorf("failed to write token file: %w", err)
+	}
+
+	return nil
+}
+
+// LoadFromFile loads token storage from the specified file path.
+func LoadFromFile(authFilePath string) (*KiroTokenStorage, error) {
+	data, err := os.ReadFile(authFilePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read token file: %w", err)
+	}
+
+	var storage KiroTokenStorage
+	if err := json.Unmarshal(data, &storage); err != nil {
+		return nil, fmt.Errorf("failed to parse token file: %w", err)
+	}
+
+	return &storage, nil
+}
+
+// ToTokenData converts storage to KiroTokenData for API use.
+func (s *KiroTokenStorage) ToTokenData() *KiroTokenData {
+	return &KiroTokenData{
+		AccessToken:  s.AccessToken,
+		RefreshToken: s.RefreshToken,
+		ProfileArn:   s.ProfileArn,
+		ExpiresAt:    s.ExpiresAt,
+		AuthMethod:   s.AuthMethod,
+		Provider:     s.Provider,
+	}
+}

internal/browser/browser.go

@@ -6,14 +6,49 @@ import (
 	"fmt"
 	"os/exec"
 	"runtime"
+	"strings"
+	"sync"
 
+	pkgbrowser "github.com/pkg/browser"
 	log "github.com/sirupsen/logrus"
-	"github.com/skratchdot/open-golang/open"
 )
 
+// incognitoMode controls whether to open URLs in incognito/private mode.
+// This is useful for OAuth flows where you want to use a different account.
+var incognitoMode bool
+
+// lastBrowserProcess stores the last opened browser process for cleanup
+var lastBrowserProcess *exec.Cmd
+var browserMutex sync.Mutex
+
+// SetIncognitoMode enables or disables incognito/private browsing mode.
+func SetIncognitoMode(enabled bool) {
+	incognitoMode = enabled
+}
+
+// IsIncognitoMode returns whether incognito mode is enabled.
+func IsIncognitoMode() bool {
+	return incognitoMode
+}
+
+// CloseBrowser closes the last opened browser process.
+func CloseBrowser() error {
+	browserMutex.Lock()
+	defer browserMutex.Unlock()
+
+	if lastBrowserProcess == nil || lastBrowserProcess.Process == nil {
+		return nil
+	}
+	
+	err := lastBrowserProcess.Process.Kill()
+	lastBrowserProcess = nil
+	return err
+}
+
 // OpenURL opens the specified URL in the default web browser.
-// It first attempts to use a platform-agnostic library and falls back to
-// platform-specific commands if that fails.
+// It uses the pkg/browser library which provides robust cross-platform support
+// for Windows, macOS, and Linux.
+// If incognito mode is enabled, it will open in a private/incognito window.
 //
 // Parameters:
 //   - url: The URL to open.
@@ -21,16 +56,22 @@ import (
 // Returns:
 //   - An error if the URL cannot be opened, otherwise nil.
 func OpenURL(url string) error {
-	fmt.Printf("Attempting to open URL in browser: %s\n", url)
+	log.Debugf("Opening URL in browser: %s (incognito=%v)", url, incognitoMode)
 
-	// Try using the open-golang library first
-	err := open.Run(url)
+	// If incognito mode is enabled, use platform-specific incognito commands
+	if incognitoMode {
+		log.Debug("Using incognito mode")
+		return openURLIncognito(url)
+	}
+
+	// Use pkg/browser for cross-platform support
+	err := pkgbrowser.OpenURL(url)
 	if err == nil {
-		log.Debug("Successfully opened URL using open-golang library")
+		log.Debug("Successfully opened URL using pkg/browser library")
 		return nil
 	}
 
-	log.Debugf("open-golang failed: %v, trying platform-specific commands", err)
+	log.Debugf("pkg/browser failed: %v, trying platform-specific commands", err)
 
 	// Fallback to platform-specific commands
 	return openURLPlatformSpecific(url)
@@ -78,18 +119,379 @@ func openURLPlatformSpecific(url string) error {
 	return nil
 }
 
+// openURLIncognito opens a URL in incognito/private browsing mode.
+// It first tries to detect the default browser and use its incognito flag.
+// Falls back to a chain of known browsers if detection fails.
+//
+// Parameters:
+//   - url: The URL to open.
+//
+// Returns:
+//   - An error if the URL cannot be opened, otherwise nil.
+func openURLIncognito(url string) error {
+	// First, try to detect and use the default browser
+	if cmd := tryDefaultBrowserIncognito(url); cmd != nil {
+		log.Debugf("Using detected default browser: %s %v", cmd.Path, cmd.Args[1:])
+		if err := cmd.Start(); err == nil {
+			storeBrowserProcess(cmd)
+			log.Debug("Successfully opened URL in default browser's incognito mode")
+			return nil
+		}
+		log.Debugf("Failed to start default browser, trying fallback chain")
+	}
+
+	// Fallback to known browser chain
+	cmd := tryFallbackBrowsersIncognito(url)
+	if cmd == nil {
+		log.Warn("No browser with incognito support found, falling back to normal mode")
+		return openURLPlatformSpecific(url)
+	}
+
+	log.Debugf("Running incognito command: %s %v", cmd.Path, cmd.Args[1:])
+	err := cmd.Start()
+	if err != nil {
+		log.Warnf("Failed to open incognito browser: %v, falling back to normal mode", err)
+		return openURLPlatformSpecific(url)
+	}
+
+	storeBrowserProcess(cmd)
+	log.Debug("Successfully opened URL in incognito/private mode")
+	return nil
+}
+
+// storeBrowserProcess safely stores the browser process for later cleanup.
+func storeBrowserProcess(cmd *exec.Cmd) {
+	browserMutex.Lock()
+	lastBrowserProcess = cmd
+	browserMutex.Unlock()
+}
+
+// tryDefaultBrowserIncognito attempts to detect the default browser and return
+// an exec.Cmd configured with the appropriate incognito flag.
+func tryDefaultBrowserIncognito(url string) *exec.Cmd {
+	switch runtime.GOOS {
+	case "darwin":
+		return tryDefaultBrowserMacOS(url)
+	case "windows":
+		return tryDefaultBrowserWindows(url)
+	case "linux":
+		return tryDefaultBrowserLinux(url)
+	}
+	return nil
+}
+
+// tryDefaultBrowserMacOS detects the default browser on macOS.
+func tryDefaultBrowserMacOS(url string) *exec.Cmd {
+	// Try to get default browser from Launch Services
+	out, err := exec.Command("defaults", "read", "com.apple.LaunchServices/com.apple.launchservices.secure", "LSHandlers").Output()
+	if err != nil {
+		return nil
+	}
+
+	output := string(out)
+	var browserName string
+
+	// Parse the output to find the http/https handler
+	if containsBrowserID(output, "com.google.chrome") {
+		browserName = "chrome"
+	} else if containsBrowserID(output, "org.mozilla.firefox") {
+		browserName = "firefox"
+	} else if containsBrowserID(output, "com.apple.safari") {
+		browserName = "safari"
+	} else if containsBrowserID(output, "com.brave.browser") {
+		browserName = "brave"
+	} else if containsBrowserID(output, "com.microsoft.edgemac") {
+		browserName = "edge"
+	}
+
+	return createMacOSIncognitoCmd(browserName, url)
+}
+
+// containsBrowserID checks if the LaunchServices output contains a browser ID.
+func containsBrowserID(output, bundleID string) bool {
+	return strings.Contains(output, bundleID)
+}
+
+// createMacOSIncognitoCmd creates the appropriate incognito command for macOS browsers.
+func createMacOSIncognitoCmd(browserName, url string) *exec.Cmd {
+	switch browserName {
+	case "chrome":
+		// Try direct path first
+		chromePath := "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome"
+		if _, err := exec.LookPath(chromePath); err == nil {
+			return exec.Command(chromePath, "--incognito", url)
+		}
+		return exec.Command("open", "-na", "Google Chrome", "--args", "--incognito", url)
+	case "firefox":
+		return exec.Command("open", "-na", "Firefox", "--args", "--private-window", url)
+	case "safari":
+		// Safari doesn't have CLI incognito, try AppleScript
+		return tryAppleScriptSafariPrivate(url)
+	case "brave":
+		return exec.Command("open", "-na", "Brave Browser", "--args", "--incognito", url)
+	case "edge":
+		return exec.Command("open", "-na", "Microsoft Edge", "--args", "--inprivate", url)
+	}
+	return nil
+}
+
+// tryAppleScriptSafariPrivate attempts to open Safari in private browsing mode using AppleScript.
+func tryAppleScriptSafariPrivate(url string) *exec.Cmd {
+	// AppleScript to open a new private window in Safari
+	script := fmt.Sprintf(`
+		tell application "Safari"
+			activate
+			tell application "System Events"
+				keystroke "n" using {command down, shift down}
+				delay 0.5
+			end tell
+			set URL of document 1 to "%s"
+		end tell
+	`, url)
+
+	cmd := exec.Command("osascript", "-e", script)
+	// Test if this approach works by checking if Safari is available
+	if _, err := exec.LookPath("/Applications/Safari.app/Contents/MacOS/Safari"); err != nil {
+		log.Debug("Safari not found, AppleScript private window not available")
+		return nil
+	}
+	log.Debug("Attempting Safari private window via AppleScript")
+	return cmd
+}
+
+// tryDefaultBrowserWindows detects the default browser on Windows via registry.
+func tryDefaultBrowserWindows(url string) *exec.Cmd {
+	// Query registry for default browser
+	out, err := exec.Command("reg", "query",
+		`HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice`,
+		"/v", "ProgId").Output()
+	if err != nil {
+		return nil
+	}
+
+	output := string(out)
+	var browserName string
+
+	// Map ProgId to browser name
+	if strings.Contains(output, "ChromeHTML") {
+		browserName = "chrome"
+	} else if strings.Contains(output, "FirefoxURL") {
+		browserName = "firefox"
+	} else if strings.Contains(output, "MSEdgeHTM") {
+		browserName = "edge"
+	} else if strings.Contains(output, "BraveHTML") {
+		browserName = "brave"
+	}
+
+	return createWindowsIncognitoCmd(browserName, url)
+}
+
+// createWindowsIncognitoCmd creates the appropriate incognito command for Windows browsers.
+func createWindowsIncognitoCmd(browserName, url string) *exec.Cmd {
+	switch browserName {
+	case "chrome":
+		paths := []string{
+			"chrome",
+			`C:\Program Files\Google\Chrome\Application\chrome.exe`,
+			`C:\Program Files (x86)\Google\Chrome\Application\chrome.exe`,
+		}
+		for _, p := range paths {
+			if _, err := exec.LookPath(p); err == nil {
+				return exec.Command(p, "--incognito", url)
+			}
+		}
+	case "firefox":
+		if path, err := exec.LookPath("firefox"); err == nil {
+			return exec.Command(path, "--private-window", url)
+		}
+	case "edge":
+		paths := []string{
+			"msedge",
+			`C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe`,
+			`C:\Program Files\Microsoft\Edge\Application\msedge.exe`,
+		}
+		for _, p := range paths {
+			if _, err := exec.LookPath(p); err == nil {
+				return exec.Command(p, "--inprivate", url)
+			}
+		}
+	case "brave":
+		paths := []string{
+			`C:\Program Files\BraveSoftware\Brave-Browser\Application\brave.exe`,
+			`C:\Program Files (x86)\BraveSoftware\Brave-Browser\Application\brave.exe`,
+		}
+		for _, p := range paths {
+			if _, err := exec.LookPath(p); err == nil {
+				return exec.Command(p, "--incognito", url)
+			}
+		}
+	}
+	return nil
+}
+
+// tryDefaultBrowserLinux detects the default browser on Linux using xdg-settings.
+func tryDefaultBrowserLinux(url string) *exec.Cmd {
+	out, err := exec.Command("xdg-settings", "get", "default-web-browser").Output()
+	if err != nil {
+		return nil
+	}
+
+	desktop := string(out)
+	var browserName string
+
+	// Map .desktop file to browser name
+	if strings.Contains(desktop, "google-chrome") || strings.Contains(desktop, "chrome") {
+		browserName = "chrome"
+	} else if strings.Contains(desktop, "firefox") {
+		browserName = "firefox"
+	} else if strings.Contains(desktop, "chromium") {
+		browserName = "chromium"
+	} else if strings.Contains(desktop, "brave") {
+		browserName = "brave"
+	} else if strings.Contains(desktop, "microsoft-edge") || strings.Contains(desktop, "msedge") {
+		browserName = "edge"
+	}
+
+	return createLinuxIncognitoCmd(browserName, url)
+}
+
+// createLinuxIncognitoCmd creates the appropriate incognito command for Linux browsers.
+func createLinuxIncognitoCmd(browserName, url string) *exec.Cmd {
+	switch browserName {
+	case "chrome":
+		paths := []string{"google-chrome", "google-chrome-stable"}
+		for _, p := range paths {
+			if path, err := exec.LookPath(p); err == nil {
+				return exec.Command(path, "--incognito", url)
+			}
+		}
+	case "firefox":
+		paths := []string{"firefox", "firefox-esr"}
+		for _, p := range paths {
+			if path, err := exec.LookPath(p); err == nil {
+				return exec.Command(path, "--private-window", url)
+			}
+		}
+	case "chromium":
+		paths := []string{"chromium", "chromium-browser"}
+		for _, p := range paths {
+			if path, err := exec.LookPath(p); err == nil {
+				return exec.Command(path, "--incognito", url)
+			}
+		}
+	case "brave":
+		if path, err := exec.LookPath("brave-browser"); err == nil {
+			return exec.Command(path, "--incognito", url)
+		}
+	case "edge":
+		if path, err := exec.LookPath("microsoft-edge"); err == nil {
+			return exec.Command(path, "--inprivate", url)
+		}
+	}
+	return nil
+}
+
+// tryFallbackBrowsersIncognito tries a chain of known browsers as fallback.
+func tryFallbackBrowsersIncognito(url string) *exec.Cmd {
+	switch runtime.GOOS {
+	case "darwin":
+		return tryFallbackBrowsersMacOS(url)
+	case "windows":
+		return tryFallbackBrowsersWindows(url)
+	case "linux":
+		return tryFallbackBrowsersLinuxChain(url)
+	}
+	return nil
+}
+
+// tryFallbackBrowsersMacOS tries known browsers on macOS.
+func tryFallbackBrowsersMacOS(url string) *exec.Cmd {
+	// Try Chrome
+	chromePath := "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome"
+	if _, err := exec.LookPath(chromePath); err == nil {
+		return exec.Command(chromePath, "--incognito", url)
+	}
+	// Try Firefox
+	if _, err := exec.LookPath("/Applications/Firefox.app/Contents/MacOS/firefox"); err == nil {
+		return exec.Command("open", "-na", "Firefox", "--args", "--private-window", url)
+	}
+	// Try Brave
+	if _, err := exec.LookPath("/Applications/Brave Browser.app/Contents/MacOS/Brave Browser"); err == nil {
+		return exec.Command("open", "-na", "Brave Browser", "--args", "--incognito", url)
+	}
+	// Try Edge
+	if _, err := exec.LookPath("/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge"); err == nil {
+		return exec.Command("open", "-na", "Microsoft Edge", "--args", "--inprivate", url)
+	}
+	// Last resort: try Safari with AppleScript
+	if cmd := tryAppleScriptSafariPrivate(url); cmd != nil {
+		log.Info("Using Safari with AppleScript for private browsing (may require accessibility permissions)")
+		return cmd
+	}
+	return nil
+}
+
+// tryFallbackBrowsersWindows tries known browsers on Windows.
+func tryFallbackBrowsersWindows(url string) *exec.Cmd {
+	// Chrome
+	chromePaths := []string{
+		"chrome",
+		`C:\Program Files\Google\Chrome\Application\chrome.exe`,
+		`C:\Program Files (x86)\Google\Chrome\Application\chrome.exe`,
+	}
+	for _, p := range chromePaths {
+		if _, err := exec.LookPath(p); err == nil {
+			return exec.Command(p, "--incognito", url)
+		}
+	}
+	// Firefox
+	if path, err := exec.LookPath("firefox"); err == nil {
+		return exec.Command(path, "--private-window", url)
+	}
+	// Edge (usually available on Windows 10+)
+	edgePaths := []string{
+		"msedge",
+		`C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe`,
+		`C:\Program Files\Microsoft\Edge\Application\msedge.exe`,
+	}
+	for _, p := range edgePaths {
+		if _, err := exec.LookPath(p); err == nil {
+			return exec.Command(p, "--inprivate", url)
+		}
+	}
+	return nil
+}
+
+// tryFallbackBrowsersLinuxChain tries known browsers on Linux.
+func tryFallbackBrowsersLinuxChain(url string) *exec.Cmd {
+	type browserConfig struct {
+		name string
+		flag string
+	}
+	browsers := []browserConfig{
+		{"google-chrome", "--incognito"},
+		{"google-chrome-stable", "--incognito"},
+		{"chromium", "--incognito"},
+		{"chromium-browser", "--incognito"},
+		{"firefox", "--private-window"},
+		{"firefox-esr", "--private-window"},
+		{"brave-browser", "--incognito"},
+		{"microsoft-edge", "--inprivate"},
+	}
+	for _, b := range browsers {
+		if path, err := exec.LookPath(b.name); err == nil {
+			return exec.Command(path, b.flag, url)
+		}
+	}
+	return nil
+}
+
 // IsAvailable checks if the system has a command available to open a web browser.
 // It verifies the presence of necessary commands for the current operating system.
 //
 // Returns:
 //   - true if a browser can be opened, false otherwise.
 func IsAvailable() bool {
-	// First check if open-golang can work
-	testErr := open.Run("about:blank")
-	if testErr == nil {
-		return true
-	}
-
 	// Check platform-specific commands
 	switch runtime.GOOS {
 	case "darwin":

internal/cmd/auth_manager.go

@@ -6,7 +6,7 @@ import (
 
 // newAuthManager creates a new authentication manager instance with all supported
 // authenticators and a file-based token store. It initializes authenticators for
-// Gemini, Codex, Claude, and Qwen providers.
+// Gemini, Codex, Claude, Qwen, IFlow, Antigravity, and GitHub Copilot providers.
 //
 // Returns:
 //   - *sdkAuth.Manager: A configured authentication manager instance
@@ -19,6 +19,8 @@ func newAuthManager() *sdkAuth.Manager {
 		sdkAuth.NewQwenAuthenticator(),
 		sdkAuth.NewIFlowAuthenticator(),
 		sdkAuth.NewAntigravityAuthenticator(),
+		sdkAuth.NewKiroAuthenticator(),
+		sdkAuth.NewGitHubCopilotAuthenticator(),
 	)
 	return manager
 }

internal/cmd/github_copilot_login.go

@@ -0,0 +1,44 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	sdkAuth "github.com/router-for-me/CLIProxyAPI/v6/sdk/auth"
+	log "github.com/sirupsen/logrus"
+)
+
+// DoGitHubCopilotLogin triggers the OAuth device flow for GitHub Copilot and saves tokens.
+// It initiates the device flow authentication, displays the user code for the user to enter
+// at GitHub's verification URL, and waits for authorization before saving the tokens.
+//
+// Parameters:
+//   - cfg: The application configuration containing proxy and auth directory settings
+//   - options: Login options including browser behavior settings
+func DoGitHubCopilotLogin(cfg *config.Config, options *LoginOptions) {
+	if options == nil {
+		options = &LoginOptions{}
+	}
+
+	manager := newAuthManager()
+	authOpts := &sdkAuth.LoginOptions{
+		NoBrowser: options.NoBrowser,
+		Metadata:  map[string]string{},
+		Prompt:    options.Prompt,
+	}
+
+	record, savedPath, err := manager.Login(context.Background(), "github-copilot", cfg, authOpts)
+	if err != nil {
+		log.Errorf("GitHub Copilot authentication failed: %v", err)
+		return
+	}
+
+	if savedPath != "" {
+		fmt.Printf("Authentication saved to %s\n", savedPath)
+	}
+	if record != nil && record.Label != "" {
+		fmt.Printf("Authenticated as %s\n", record.Label)
+	}
+	fmt.Println("GitHub Copilot authentication successful!")
+}

internal/cmd/kiro_login.go

@@ -0,0 +1,208 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	sdkAuth "github.com/router-for-me/CLIProxyAPI/v6/sdk/auth"
+	log "github.com/sirupsen/logrus"
+)
+
+// DoKiroLogin triggers the Kiro authentication flow with Google OAuth.
+// This is the default login method (same as --kiro-google-login).
+//
+// Parameters:
+//   - cfg: The application configuration
+//   - options: Login options including Prompt field
+func DoKiroLogin(cfg *config.Config, options *LoginOptions) {
+	// Use Google login as default
+	DoKiroGoogleLogin(cfg, options)
+}
+
+// DoKiroGoogleLogin triggers Kiro authentication with Google OAuth.
+// This uses a custom protocol handler (kiro://) to receive the callback.
+//
+// Parameters:
+//   - cfg: The application configuration
+//   - options: Login options including prompts
+func DoKiroGoogleLogin(cfg *config.Config, options *LoginOptions) {
+	if options == nil {
+		options = &LoginOptions{}
+	}
+
+	// Note: Kiro defaults to incognito mode for multi-account support.
+	// Users can override with --no-incognito if they want to use existing browser sessions.
+
+	manager := newAuthManager()
+
+	// Use KiroAuthenticator with Google login
+	authenticator := sdkAuth.NewKiroAuthenticator()
+	record, err := authenticator.LoginWithGoogle(context.Background(), cfg, &sdkAuth.LoginOptions{
+		NoBrowser: options.NoBrowser,
+		Metadata:  map[string]string{},
+		Prompt:    options.Prompt,
+	})
+	if err != nil {
+		log.Errorf("Kiro Google authentication failed: %v", err)
+		fmt.Println("\nTroubleshooting:")
+		fmt.Println("1. Make sure the protocol handler is installed")
+		fmt.Println("2. Complete the Google login in the browser")
+		fmt.Println("3. If callback fails, try: --kiro-import (after logging in via Kiro IDE)")
+		return
+	}
+
+	// Save the auth record
+	savedPath, err := manager.SaveAuth(record, cfg)
+	if err != nil {
+		log.Errorf("Failed to save auth: %v", err)
+		return
+	}
+
+	if savedPath != "" {
+		fmt.Printf("Authentication saved to %s\n", savedPath)
+	}
+	if record != nil && record.Label != "" {
+		fmt.Printf("Authenticated as %s\n", record.Label)
+	}
+	fmt.Println("Kiro Google authentication successful!")
+}
+
+// DoKiroAWSLogin triggers Kiro authentication with AWS Builder ID.
+// This uses the device code flow for AWS SSO OIDC authentication.
+//
+// Parameters:
+//   - cfg: The application configuration
+//   - options: Login options including prompts
+func DoKiroAWSLogin(cfg *config.Config, options *LoginOptions) {
+	if options == nil {
+		options = &LoginOptions{}
+	}
+
+	// Note: Kiro defaults to incognito mode for multi-account support.
+	// Users can override with --no-incognito if they want to use existing browser sessions.
+
+	manager := newAuthManager()
+
+	// Use KiroAuthenticator with AWS Builder ID login (device code flow)
+	authenticator := sdkAuth.NewKiroAuthenticator()
+	record, err := authenticator.Login(context.Background(), cfg, &sdkAuth.LoginOptions{
+		NoBrowser: options.NoBrowser,
+		Metadata:  map[string]string{},
+		Prompt:    options.Prompt,
+	})
+	if err != nil {
+		log.Errorf("Kiro AWS authentication failed: %v", err)
+		fmt.Println("\nTroubleshooting:")
+		fmt.Println("1. Make sure you have an AWS Builder ID")
+		fmt.Println("2. Complete the authorization in the browser")
+		fmt.Println("3. If callback fails, try: --kiro-import (after logging in via Kiro IDE)")
+		return
+	}
+
+	// Save the auth record
+	savedPath, err := manager.SaveAuth(record, cfg)
+	if err != nil {
+		log.Errorf("Failed to save auth: %v", err)
+		return
+	}
+
+	if savedPath != "" {
+		fmt.Printf("Authentication saved to %s\n", savedPath)
+	}
+	if record != nil && record.Label != "" {
+		fmt.Printf("Authenticated as %s\n", record.Label)
+	}
+	fmt.Println("Kiro AWS authentication successful!")
+}
+
+// DoKiroAWSAuthCodeLogin triggers Kiro authentication with AWS Builder ID using authorization code flow.
+// This provides a better UX than device code flow as it uses automatic browser callback.
+//
+// Parameters:
+//   - cfg: The application configuration
+//   - options: Login options including prompts
+func DoKiroAWSAuthCodeLogin(cfg *config.Config, options *LoginOptions) {
+	if options == nil {
+		options = &LoginOptions{}
+	}
+
+	// Note: Kiro defaults to incognito mode for multi-account support.
+	// Users can override with --no-incognito if they want to use existing browser sessions.
+
+	manager := newAuthManager()
+
+	// Use KiroAuthenticator with AWS Builder ID login (authorization code flow)
+	authenticator := sdkAuth.NewKiroAuthenticator()
+	record, err := authenticator.LoginWithAuthCode(context.Background(), cfg, &sdkAuth.LoginOptions{
+		NoBrowser: options.NoBrowser,
+		Metadata:  map[string]string{},
+		Prompt:    options.Prompt,
+	})
+	if err != nil {
+		log.Errorf("Kiro AWS authentication (auth code) failed: %v", err)
+		fmt.Println("\nTroubleshooting:")
+		fmt.Println("1. Make sure you have an AWS Builder ID")
+		fmt.Println("2. Complete the authorization in the browser")
+		fmt.Println("3. If callback fails, try: --kiro-aws-login (device code flow)")
+		return
+	}
+
+	// Save the auth record
+	savedPath, err := manager.SaveAuth(record, cfg)
+	if err != nil {
+		log.Errorf("Failed to save auth: %v", err)
+		return
+	}
+
+	if savedPath != "" {
+		fmt.Printf("Authentication saved to %s\n", savedPath)
+	}
+	if record != nil && record.Label != "" {
+		fmt.Printf("Authenticated as %s\n", record.Label)
+	}
+	fmt.Println("Kiro AWS authentication successful!")
+}
+
+// DoKiroImport imports Kiro token from Kiro IDE's token file.
+// This is useful for users who have already logged in via Kiro IDE
+// and want to use the same credentials in CLI Proxy API.
+//
+// Parameters:
+//   - cfg: The application configuration
+//   - options: Login options (currently unused for import)
+func DoKiroImport(cfg *config.Config, options *LoginOptions) {
+	if options == nil {
+		options = &LoginOptions{}
+	}
+
+	manager := newAuthManager()
+
+	// Use ImportFromKiroIDE instead of Login
+	authenticator := sdkAuth.NewKiroAuthenticator()
+	record, err := authenticator.ImportFromKiroIDE(context.Background(), cfg)
+	if err != nil {
+		log.Errorf("Kiro token import failed: %v", err)
+		fmt.Println("\nMake sure you have logged in to Kiro IDE first:")
+		fmt.Println("1. Open Kiro IDE")
+		fmt.Println("2. Click 'Sign in with Google' (or GitHub)")
+		fmt.Println("3. Complete the login process")
+		fmt.Println("4. Run this command again")
+		return
+	}
+
+	// Save the imported auth record
+	savedPath, err := manager.SaveAuth(record, cfg)
+	if err != nil {
+		log.Errorf("Failed to save auth: %v", err)
+		return
+	}
+
+	if savedPath != "" {
+		fmt.Printf("Authentication saved to %s\n", savedPath)
+	}
+	if record != nil && record.Label != "" {
+		fmt.Printf("Imported as %s\n", record.Label)
+	}
+	fmt.Println("Kiro token import successful!")
+}

internal/cmd/login.go

@@ -261,7 +261,8 @@ func performGeminiCLISetup(ctx context.Context, httpClient *http.Client, storage
 			finalProjectID := projectID
 			if responseProjectID != "" {
 				if explicitProject && !strings.EqualFold(responseProjectID, projectID) {
-					log.Warnf("Gemini onboarding returned project %s instead of requested %s; keeping requested project ID.", responseProjectID, projectID)
+					log.Warnf("Gemini onboarding returned project %s instead of requested %s; using response project ID.", responseProjectID, projectID)
+					finalProjectID = responseProjectID
 				} else {
 					finalProjectID = responseProjectID
 				}

internal/config/config.go

@@ -74,6 +74,13 @@ type Config struct {
 	// GeminiKey defines Gemini API key configurations with optional routing overrides.
 	GeminiKey []GeminiKey `yaml:"gemini-api-key" json:"gemini-api-key"`
 
+	// KiroKey defines a list of Kiro (AWS CodeWhisperer) configurations.
+	KiroKey []KiroKey `yaml:"kiro" json:"kiro"`
+
+	// KiroPreferredEndpoint sets the global default preferred endpoint for all Kiro providers.
+	// Values: "ide" (default, CodeWhisperer) or "cli" (Amazon Q).
+	KiroPreferredEndpoint string `yaml:"kiro-preferred-endpoint" json:"kiro-preferred-endpoint"`
+
 	// Codex defines a list of Codex API key configurations as specified in the YAML configuration file.
 	CodexKey []CodexKey `yaml:"codex-api-key" json:"codex-api-key"`
 
@@ -91,6 +98,7 @@ type Config struct {
 	AmpCode AmpCode `yaml:"ampcode" json:"ampcode"`
 
 	// OAuthExcludedModels defines per-provider global model exclusions applied to OAuth/file-backed auth entries.
+	// Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow, kiro, github-copilot.
 	OAuthExcludedModels map[string][]string `yaml:"oauth-excluded-models,omitempty" json:"oauth-excluded-models,omitempty"`
 
 	// OAuthModelAlias defines global model name aliases for OAuth/file-backed auth channels.
@@ -104,6 +112,11 @@ type Config struct {
 	// Payload defines default and override rules for provider payload parameters.
 	Payload PayloadConfig `yaml:"payload" json:"payload"`
 
+	// IncognitoBrowser enables opening OAuth URLs in incognito/private browsing mode.
+	// This is useful when you want to login with a different account without logging out
+	// from your current session. Default: false.
+	IncognitoBrowser bool `yaml:"incognito-browser" json:"incognito-browser"`
+
 	legacyMigrationPending bool `yaml:"-" json:"-"`
 }
 
@@ -377,6 +390,35 @@ type GeminiModel struct {
 func (m GeminiModel) GetName() string  { return m.Name }
 func (m GeminiModel) GetAlias() string { return m.Alias }
 
+// KiroKey represents the configuration for Kiro (AWS CodeWhisperer) authentication.
+type KiroKey struct {
+	// TokenFile is the path to the Kiro token file (default: ~/.aws/sso/cache/kiro-auth-token.json)
+	TokenFile string `yaml:"token-file,omitempty" json:"token-file,omitempty"`
+
+	// AccessToken is the OAuth access token for direct configuration.
+	AccessToken string `yaml:"access-token,omitempty" json:"access-token,omitempty"`
+
+	// RefreshToken is the OAuth refresh token for token renewal.
+	RefreshToken string `yaml:"refresh-token,omitempty" json:"refresh-token,omitempty"`
+
+	// ProfileArn is the AWS CodeWhisperer profile ARN.
+	ProfileArn string `yaml:"profile-arn,omitempty" json:"profile-arn,omitempty"`
+
+	// Region is the AWS region (default: us-east-1).
+	Region string `yaml:"region,omitempty" json:"region,omitempty"`
+
+	// ProxyURL optionally overrides the global proxy for this configuration.
+	ProxyURL string `yaml:"proxy-url,omitempty" json:"proxy-url,omitempty"`
+
+	// AgentTaskType sets the Kiro API task type. Known values: "vibe", "dev", "chat".
+	// Leave empty to let API use defaults. Different values may inject different system prompts.
+	AgentTaskType string `yaml:"agent-task-type,omitempty" json:"agent-task-type,omitempty"`
+
+	// PreferredEndpoint sets the preferred Kiro API endpoint/quota.
+	// Values: "codewhisperer" (default, IDE quota) or "amazonq" (CLI quota).
+	PreferredEndpoint string `yaml:"preferred-endpoint,omitempty" json:"preferred-endpoint,omitempty"`
+}
+
 // OpenAICompatibility represents the configuration for OpenAI API compatibility
 // with external providers, allowing model aliases to be routed through OpenAI API format.
 type OpenAICompatibility struct {
@@ -479,6 +521,7 @@ func LoadConfigOptional(configFile string, optional bool) (*Config, error) {
 	cfg.DisableCooling = false
 	cfg.AmpCode.RestrictManagementToLocalhost = false // Default to false: API key auth is sufficient
 	cfg.RemoteManagement.PanelGitHubRepository = DefaultPanelGitHubRepository
+	cfg.IncognitoBrowser = false // Default to normal browser (AWS uses incognito by force)
 	if err = yaml.Unmarshal(data, &cfg); err != nil {
 		if optional {
 			// In cloud deploy mode, if YAML parsing fails, return empty config instead of error.
@@ -538,6 +581,9 @@ func LoadConfigOptional(configFile string, optional bool) (*Config, error) {
 	// Sanitize Claude key headers
 	cfg.SanitizeClaudeKeys()
 
+	// Sanitize Kiro keys: trim whitespace from credential fields
+	cfg.SanitizeKiroKeys()
+
 	// Sanitize OpenAI compatibility providers: drop entries without base-url
 	cfg.SanitizeOpenAICompatibility()
 
@@ -716,6 +762,23 @@ func (cfg *Config) SanitizeClaudeKeys() {
 	}
 }
 
+// SanitizeKiroKeys trims whitespace from Kiro credential fields.
+func (cfg *Config) SanitizeKiroKeys() {
+	if cfg == nil || len(cfg.KiroKey) == 0 {
+		return
+	}
+	for i := range cfg.KiroKey {
+		entry := &cfg.KiroKey[i]
+		entry.TokenFile = strings.TrimSpace(entry.TokenFile)
+		entry.AccessToken = strings.TrimSpace(entry.AccessToken)
+		entry.RefreshToken = strings.TrimSpace(entry.RefreshToken)
+		entry.ProfileArn = strings.TrimSpace(entry.ProfileArn)
+		entry.Region = strings.TrimSpace(entry.Region)
+		entry.ProxyURL = strings.TrimSpace(entry.ProxyURL)
+		entry.PreferredEndpoint = strings.TrimSpace(entry.PreferredEndpoint)
+	}
+}
+
 // SanitizeGeminiKeys deduplicates and normalizes Gemini credentials.
 func (cfg *Config) SanitizeGeminiKeys() {
 	if cfg == nil {

internal/constant/constant.go

@@ -24,4 +24,7 @@ const (
 
 	// Antigravity represents the Antigravity response format identifier.
 	Antigravity = "antigravity"
+
+	// Kiro represents the AWS CodeWhisperer (Kiro) provider identifier.
+	Kiro = "kiro"
 )

internal/logging/global_logger.go

@@ -85,6 +85,7 @@ func (m *LogFormatter) Format(entry *log.Entry) ([]byte, error) {
 func SetupBaseLogger() {
 	setupOnce.Do(func() {
 		log.SetOutput(os.Stdout)
+		log.SetLevel(log.InfoLevel)
 		log.SetReportCaller(true)
 		log.SetFormatter(&LogFormatter{})
 

internal/registry/model_definitions.go

@@ -820,3 +820,364 @@ func LookupStaticModelInfo(modelID string) *ModelInfo {
 
 	return nil
 }
+
+// GetGitHubCopilotModels returns the available models for GitHub Copilot.
+// These models are available through the GitHub Copilot API at api.githubcopilot.com.
+func GetGitHubCopilotModels() []*ModelInfo {
+	now := int64(1732752000) // 2024-11-27
+	return []*ModelInfo{
+		{
+			ID:                  "gpt-4.1",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "GPT-4.1",
+			Description:         "OpenAI GPT-4.1 via GitHub Copilot",
+			ContextLength:       128000,
+			MaxCompletionTokens: 16384,
+		},
+		{
+			ID:                  "gpt-5",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "GPT-5",
+			Description:         "OpenAI GPT-5 via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 32768,
+		},
+		{
+			ID:                  "gpt-5-mini",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "GPT-5 Mini",
+			Description:         "OpenAI GPT-5 Mini via GitHub Copilot",
+			ContextLength:       128000,
+			MaxCompletionTokens: 16384,
+		},
+		{
+			ID:                  "gpt-5-codex",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "GPT-5 Codex",
+			Description:         "OpenAI GPT-5 Codex via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 32768,
+		},
+		{
+			ID:                  "gpt-5.1",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "GPT-5.1",
+			Description:         "OpenAI GPT-5.1 via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 32768,
+		},
+		{
+			ID:                  "gpt-5.1-codex",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "GPT-5.1 Codex",
+			Description:         "OpenAI GPT-5.1 Codex via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 32768,
+		},
+		{
+			ID:                  "gpt-5.1-codex-mini",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "GPT-5.1 Codex Mini",
+			Description:         "OpenAI GPT-5.1 Codex Mini via GitHub Copilot",
+			ContextLength:       128000,
+			MaxCompletionTokens: 16384,
+		},
+		{
+			ID:                  "gpt-5.2",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "GPT-5.2",
+			Description:         "OpenAI GPT-5.2 via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 32768,
+		},
+		{
+			ID:                  "claude-haiku-4.5",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Claude Haiku 4.5",
+			Description:         "Anthropic Claude Haiku 4.5 via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+		{
+			ID:                  "claude-opus-4.1",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Claude Opus 4.1",
+			Description:         "Anthropic Claude Opus 4.1 via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 32000,
+		},
+		{
+			ID:                  "claude-opus-4.5",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Claude Opus 4.5",
+			Description:         "Anthropic Claude Opus 4.5 via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+		{
+			ID:                  "claude-sonnet-4",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Claude Sonnet 4",
+			Description:         "Anthropic Claude Sonnet 4 via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+		{
+			ID:                  "claude-sonnet-4.5",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Claude Sonnet 4.5",
+			Description:         "Anthropic Claude Sonnet 4.5 via GitHub Copilot",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+		{
+			ID:                  "gemini-2.5-pro",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Gemini 2.5 Pro",
+			Description:         "Google Gemini 2.5 Pro via GitHub Copilot",
+			ContextLength:       1048576,
+			MaxCompletionTokens: 65536,
+		},
+		{
+			ID:                  "gemini-3-pro",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Gemini 3 Pro",
+			Description:         "Google Gemini 3 Pro via GitHub Copilot",
+			ContextLength:       1048576,
+			MaxCompletionTokens: 65536,
+		},
+		{
+			ID:                  "grok-code-fast-1",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Grok Code Fast 1",
+			Description:         "xAI Grok Code Fast 1 via GitHub Copilot",
+			ContextLength:       128000,
+			MaxCompletionTokens: 16384,
+		},
+		{
+			ID:                  "raptor-mini",
+			Object:              "model",
+			Created:             now,
+			OwnedBy:             "github-copilot",
+			Type:                "github-copilot",
+			DisplayName:         "Raptor Mini",
+			Description:         "Raptor Mini via GitHub Copilot",
+			ContextLength:       128000,
+			MaxCompletionTokens: 16384,
+		},
+	}
+}
+
+// GetKiroModels returns the Kiro (AWS CodeWhisperer) model definitions
+func GetKiroModels() []*ModelInfo {
+	return []*ModelInfo{
+		// --- Base Models ---
+		{
+			ID:                  "kiro-claude-opus-4-5",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Kiro Claude Opus 4.5",
+			Description:         "Claude Opus 4.5 via Kiro (2.2x credit)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+			Thinking:            &ThinkingSupport{Min: 1024, Max: 32000, ZeroAllowed: true, DynamicAllowed: true},
+		},
+		{
+			ID:                  "kiro-claude-sonnet-4-5",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Kiro Claude Sonnet 4.5",
+			Description:         "Claude Sonnet 4.5 via Kiro (1.3x credit)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+			Thinking:            &ThinkingSupport{Min: 1024, Max: 32000, ZeroAllowed: true, DynamicAllowed: true},
+		},
+		{
+			ID:                  "kiro-claude-sonnet-4",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Kiro Claude Sonnet 4",
+			Description:         "Claude Sonnet 4 via Kiro (1.3x credit)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+			Thinking:            &ThinkingSupport{Min: 1024, Max: 32000, ZeroAllowed: true, DynamicAllowed: true},
+		},
+		{
+			ID:                  "kiro-claude-haiku-4-5",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Kiro Claude Haiku 4.5",
+			Description:         "Claude Haiku 4.5 via Kiro (0.4x credit)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+			Thinking:            &ThinkingSupport{Min: 1024, Max: 32000, ZeroAllowed: true, DynamicAllowed: true},
+		},
+		// --- Agentic Variants (Optimized for coding agents with chunked writes) ---
+		{
+			ID:                  "kiro-claude-opus-4-5-agentic",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Kiro Claude Opus 4.5 (Agentic)",
+			Description:         "Claude Opus 4.5 optimized for coding agents (chunked writes)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+			Thinking:            &ThinkingSupport{Min: 1024, Max: 32000, ZeroAllowed: true, DynamicAllowed: true},
+		},
+		{
+			ID:                  "kiro-claude-sonnet-4-5-agentic",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Kiro Claude Sonnet 4.5 (Agentic)",
+			Description:         "Claude Sonnet 4.5 optimized for coding agents (chunked writes)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+			Thinking:            &ThinkingSupport{Min: 1024, Max: 32000, ZeroAllowed: true, DynamicAllowed: true},
+		},
+		{
+			ID:                  "kiro-claude-sonnet-4-agentic",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Kiro Claude Sonnet 4 (Agentic)",
+			Description:         "Claude Sonnet 4 optimized for coding agents (chunked writes)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+			Thinking:            &ThinkingSupport{Min: 1024, Max: 32000, ZeroAllowed: true, DynamicAllowed: true},
+		},
+		{
+			ID:                  "kiro-claude-haiku-4-5-agentic",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Kiro Claude Haiku 4.5 (Agentic)",
+			Description:         "Claude Haiku 4.5 optimized for coding agents (chunked writes)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+			Thinking:            &ThinkingSupport{Min: 1024, Max: 32000, ZeroAllowed: true, DynamicAllowed: true},
+		},
+	}
+}
+
+// GetAmazonQModels returns the Amazon Q (AWS CodeWhisperer) model definitions.
+// These models use the same API as Kiro and share the same executor.
+func GetAmazonQModels() []*ModelInfo {
+	return []*ModelInfo{
+		{
+			ID:                  "amazonq-auto",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro", // Uses Kiro executor - same API
+			DisplayName:         "Amazon Q Auto",
+			Description:         "Automatic model selection by Amazon Q",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+		{
+			ID:                  "amazonq-claude-opus-4.5",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Amazon Q Claude Opus 4.5",
+			Description:         "Claude Opus 4.5 via Amazon Q (2.2x credit)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+		{
+			ID:                  "amazonq-claude-sonnet-4.5",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Amazon Q Claude Sonnet 4.5",
+			Description:         "Claude Sonnet 4.5 via Amazon Q (1.3x credit)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+		{
+			ID:                  "amazonq-claude-sonnet-4",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Amazon Q Claude Sonnet 4",
+			Description:         "Claude Sonnet 4 via Amazon Q (1.3x credit)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+		{
+			ID:                  "amazonq-claude-haiku-4.5",
+			Object:              "model",
+			Created:             1732752000,
+			OwnedBy:             "aws",
+			Type:                "kiro",
+			DisplayName:         "Amazon Q Claude Haiku 4.5",
+			Description:         "Claude Haiku 4.5 via Amazon Q (0.4x credit)",
+			ContextLength:       200000,
+			MaxCompletionTokens: 64000,
+		},
+	}
+}

internal/registry/model_registry.go

@@ -990,7 +990,8 @@ func (r *ModelRegistry) convertModelToMap(model *ModelInfo, handlerType string)
 		}
 		return result
 
-	case "claude":
+	case "claude", "kiro", "antigravity":
+		// Claude, Kiro, and Antigravity all use Claude-compatible format for Claude Code client
 		result := map[string]any{
 			"id":       model.ID,
 			"object":   "model",
@@ -1005,6 +1006,19 @@ func (r *ModelRegistry) convertModelToMap(model *ModelInfo, handlerType string)
 		if model.DisplayName != "" {
 			result["display_name"] = model.DisplayName
 		}
+		// Add thinking support for Claude Code client
+		// Claude Code checks for "thinking" field (simple boolean) to enable tab toggle
+		// Also add "extended_thinking" for detailed budget info
+		if model.Thinking != nil {
+			result["thinking"] = true
+			result["extended_thinking"] = map[string]any{
+				"supported":       true,
+				"min":             model.Thinking.Min,
+				"max":             model.Thinking.Max,
+				"zero_allowed":    model.Thinking.ZeroAllowed,
+				"dynamic_allowed": model.Thinking.DynamicAllowed,
+			}
+		}
 		return result
 
 	case "gemini":

internal/runtime/executor/cache_helpers.go

@@ -29,6 +29,7 @@ func startCodexCacheCleanup() {
 	go func() {
 		ticker := time.NewTicker(codexCacheCleanupInterval)
 		defer ticker.Stop()
+
 		for range ticker.C {
 			purgeExpiredCodexCache()
 		}
@@ -38,8 +39,10 @@ func startCodexCacheCleanup() {
 // purgeExpiredCodexCache removes entries that have expired.
 func purgeExpiredCodexCache() {
 	now := time.Now()
+
 	codexCacheMu.Lock()
 	defer codexCacheMu.Unlock()
+
 	for key, cache := range codexCacheMap {
 		if cache.Expire.Before(now) {
 			delete(codexCacheMap, key)
@@ -66,3 +69,10 @@ func setCodexCache(key string, cache codexCache) {
 	codexCacheMap[key] = cache
 	codexCacheMu.Unlock()
 }
+
+// deleteCodexCache deletes a cache entry.
+func deleteCodexCache(key string) {
+	codexCacheMu.Lock()
+	delete(codexCacheMap, key)
+	codexCacheMu.Unlock()
+}

internal/runtime/executor/github_copilot_executor.go

@@ -0,0 +1,399 @@
+package executor
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/google/uuid"
+	copilotauth "github.com/router-for-me/CLIProxyAPI/v6/internal/auth/copilot"
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
+	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"
+	sdktranslator "github.com/router-for-me/CLIProxyAPI/v6/sdk/translator"
+	log "github.com/sirupsen/logrus"
+	"github.com/tidwall/sjson"
+)
+
+const (
+	githubCopilotBaseURL       = "https://api.githubcopilot.com"
+	githubCopilotChatPath      = "/chat/completions"
+	githubCopilotAuthType      = "github-copilot"
+	githubCopilotTokenCacheTTL = 25 * time.Minute
+	// tokenExpiryBuffer is the time before expiry when we should refresh the token.
+	tokenExpiryBuffer = 5 * time.Minute
+	// maxScannerBufferSize is the maximum buffer size for SSE scanning (20MB).
+	maxScannerBufferSize = 20_971_520
+
+	// Copilot API header values.
+	copilotUserAgent     = "GithubCopilot/1.0"
+	copilotEditorVersion = "vscode/1.100.0"
+	copilotPluginVersion = "copilot/1.300.0"
+	copilotIntegrationID = "vscode-chat"
+	copilotOpenAIIntent  = "conversation-panel"
+)
+
+// GitHubCopilotExecutor handles requests to the GitHub Copilot API.
+type GitHubCopilotExecutor struct {
+	cfg   *config.Config
+	mu    sync.RWMutex
+	cache map[string]*cachedAPIToken
+}
+
+// cachedAPIToken stores a cached Copilot API token with its expiry.
+type cachedAPIToken struct {
+	token     string
+	expiresAt time.Time
+}
+
+// NewGitHubCopilotExecutor constructs a new executor instance.
+func NewGitHubCopilotExecutor(cfg *config.Config) *GitHubCopilotExecutor {
+	return &GitHubCopilotExecutor{
+		cfg:   cfg,
+		cache: make(map[string]*cachedAPIToken),
+	}
+}
+
+// Identifier implements ProviderExecutor.
+func (e *GitHubCopilotExecutor) Identifier() string { return githubCopilotAuthType }
+
+// PrepareRequest implements ProviderExecutor.
+func (e *GitHubCopilotExecutor) PrepareRequest(req *http.Request, auth *cliproxyauth.Auth) error {
+	if req == nil {
+		return nil
+	}
+	ctx := req.Context()
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	apiToken, errToken := e.ensureAPIToken(ctx, auth)
+	if errToken != nil {
+		return errToken
+	}
+	e.applyHeaders(req, apiToken)
+	return nil
+}
+
+// HttpRequest injects GitHub Copilot credentials into the request and executes it.
+func (e *GitHubCopilotExecutor) HttpRequest(ctx context.Context, auth *cliproxyauth.Auth, req *http.Request) (*http.Response, error) {
+	if req == nil {
+		return nil, fmt.Errorf("github-copilot executor: request is nil")
+	}
+	if ctx == nil {
+		ctx = req.Context()
+	}
+	httpReq := req.WithContext(ctx)
+	if errPrepare := e.PrepareRequest(httpReq, auth); errPrepare != nil {
+		return nil, errPrepare
+	}
+	httpClient := newProxyAwareHTTPClient(ctx, e.cfg, auth, 0)
+	return httpClient.Do(httpReq)
+}
+
+// Execute handles non-streaming requests to GitHub Copilot.
+func (e *GitHubCopilotExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (resp cliproxyexecutor.Response, err error) {
+	apiToken, errToken := e.ensureAPIToken(ctx, auth)
+	if errToken != nil {
+		return resp, errToken
+	}
+
+	reporter := newUsageReporter(ctx, e.Identifier(), req.Model, auth)
+	defer reporter.trackFailure(ctx, &err)
+
+	from := opts.SourceFormat
+	to := sdktranslator.FromString("openai")
+	originalPayload := bytes.Clone(req.Payload)
+	if len(opts.OriginalRequest) > 0 {
+		originalPayload = bytes.Clone(opts.OriginalRequest)
+	}
+	originalTranslated := sdktranslator.TranslateRequest(from, to, req.Model, originalPayload, false)
+	body := sdktranslator.TranslateRequest(from, to, req.Model, bytes.Clone(req.Payload), false)
+	body = e.normalizeModel(req.Model, body)
+	body = applyPayloadConfigWithRoot(e.cfg, req.Model, to.String(), "", body, originalTranslated)
+	body, _ = sjson.SetBytes(body, "stream", false)
+
+	url := githubCopilotBaseURL + githubCopilotChatPath
+	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
+	if err != nil {
+		return resp, err
+	}
+	e.applyHeaders(httpReq, apiToken)
+
+	var authID, authLabel, authType, authValue string
+	if auth != nil {
+		authID = auth.ID
+		authLabel = auth.Label
+		authType, authValue = auth.AccountInfo()
+	}
+	recordAPIRequest(ctx, e.cfg, upstreamRequestLog{
+		URL:       url,
+		Method:    http.MethodPost,
+		Headers:   httpReq.Header.Clone(),
+		Body:      body,
+		Provider:  e.Identifier(),
+		AuthID:    authID,
+		AuthLabel: authLabel,
+		AuthType:  authType,
+		AuthValue: authValue,
+	})
+
+	httpClient := newProxyAwareHTTPClient(ctx, e.cfg, auth, 0)
+	httpResp, err := httpClient.Do(httpReq)
+	if err != nil {
+		recordAPIResponseError(ctx, e.cfg, err)
+		return resp, err
+	}
+	defer func() {
+		if errClose := httpResp.Body.Close(); errClose != nil {
+			log.Errorf("github-copilot executor: close response body error: %v", errClose)
+		}
+	}()
+
+	recordAPIResponseMetadata(ctx, e.cfg, httpResp.StatusCode, httpResp.Header.Clone())
+
+	if !isHTTPSuccess(httpResp.StatusCode) {
+		data, _ := io.ReadAll(httpResp.Body)
+		appendAPIResponseChunk(ctx, e.cfg, data)
+		log.Debugf("github-copilot executor: upstream error status: %d, body: %s", httpResp.StatusCode, summarizeErrorBody(httpResp.Header.Get("Content-Type"), data))
+		err = statusErr{code: httpResp.StatusCode, msg: string(data)}
+		return resp, err
+	}
+
+	data, err := io.ReadAll(httpResp.Body)
+	if err != nil {
+		recordAPIResponseError(ctx, e.cfg, err)
+		return resp, err
+	}
+	appendAPIResponseChunk(ctx, e.cfg, data)
+
+	detail := parseOpenAIUsage(data)
+	if detail.TotalTokens > 0 {
+		reporter.publish(ctx, detail)
+	}
+
+	var param any
+	converted := sdktranslator.TranslateNonStream(ctx, to, from, req.Model, bytes.Clone(opts.OriginalRequest), body, data, &param)
+	resp = cliproxyexecutor.Response{Payload: []byte(converted)}
+	reporter.ensurePublished(ctx)
+	return resp, nil
+}
+
+// ExecuteStream handles streaming requests to GitHub Copilot.
+func (e *GitHubCopilotExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (stream <-chan cliproxyexecutor.StreamChunk, err error) {
+	apiToken, errToken := e.ensureAPIToken(ctx, auth)
+	if errToken != nil {
+		return nil, errToken
+	}
+
+	reporter := newUsageReporter(ctx, e.Identifier(), req.Model, auth)
+	defer reporter.trackFailure(ctx, &err)
+
+	from := opts.SourceFormat
+	to := sdktranslator.FromString("openai")
+	originalPayload := bytes.Clone(req.Payload)
+	if len(opts.OriginalRequest) > 0 {
+		originalPayload = bytes.Clone(opts.OriginalRequest)
+	}
+	originalTranslated := sdktranslator.TranslateRequest(from, to, req.Model, originalPayload, false)
+	body := sdktranslator.TranslateRequest(from, to, req.Model, bytes.Clone(req.Payload), true)
+	body = e.normalizeModel(req.Model, body)
+	body = applyPayloadConfigWithRoot(e.cfg, req.Model, to.String(), "", body, originalTranslated)
+	body, _ = sjson.SetBytes(body, "stream", true)
+	// Enable stream options for usage stats in stream
+	body, _ = sjson.SetBytes(body, "stream_options.include_usage", true)
+
+	url := githubCopilotBaseURL + githubCopilotChatPath
+	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
+	if err != nil {
+		return nil, err
+	}
+	e.applyHeaders(httpReq, apiToken)
+
+	var authID, authLabel, authType, authValue string
+	if auth != nil {
+		authID = auth.ID
+		authLabel = auth.Label
+		authType, authValue = auth.AccountInfo()
+	}
+	recordAPIRequest(ctx, e.cfg, upstreamRequestLog{
+		URL:       url,
+		Method:    http.MethodPost,
+		Headers:   httpReq.Header.Clone(),
+		Body:      body,
+		Provider:  e.Identifier(),
+		AuthID:    authID,
+		AuthLabel: authLabel,
+		AuthType:  authType,
+		AuthValue: authValue,
+	})
+
+	httpClient := newProxyAwareHTTPClient(ctx, e.cfg, auth, 0)
+	httpResp, err := httpClient.Do(httpReq)
+	if err != nil {
+		recordAPIResponseError(ctx, e.cfg, err)
+		return nil, err
+	}
+
+	recordAPIResponseMetadata(ctx, e.cfg, httpResp.StatusCode, httpResp.Header.Clone())
+
+	if !isHTTPSuccess(httpResp.StatusCode) {
+		data, readErr := io.ReadAll(httpResp.Body)
+		if errClose := httpResp.Body.Close(); errClose != nil {
+			log.Errorf("github-copilot executor: close response body error: %v", errClose)
+		}
+		if readErr != nil {
+			recordAPIResponseError(ctx, e.cfg, readErr)
+			return nil, readErr
+		}
+		appendAPIResponseChunk(ctx, e.cfg, data)
+		log.Debugf("github-copilot executor: upstream error status: %d, body: %s", httpResp.StatusCode, summarizeErrorBody(httpResp.Header.Get("Content-Type"), data))
+		err = statusErr{code: httpResp.StatusCode, msg: string(data)}
+		return nil, err
+	}
+
+	out := make(chan cliproxyexecutor.StreamChunk)
+	stream = out
+
+	go func() {
+		defer close(out)
+		defer func() {
+			if errClose := httpResp.Body.Close(); errClose != nil {
+				log.Errorf("github-copilot executor: close response body error: %v", errClose)
+			}
+		}()
+
+		scanner := bufio.NewScanner(httpResp.Body)
+		scanner.Buffer(nil, maxScannerBufferSize)
+		var param any
+
+		for scanner.Scan() {
+			line := scanner.Bytes()
+			appendAPIResponseChunk(ctx, e.cfg, line)
+
+			// Parse SSE data
+			if bytes.HasPrefix(line, dataTag) {
+				data := bytes.TrimSpace(line[5:])
+				if bytes.Equal(data, []byte("[DONE]")) {
+					continue
+				}
+				if detail, ok := parseOpenAIStreamUsage(line); ok {
+					reporter.publish(ctx, detail)
+				}
+			}
+
+			chunks := sdktranslator.TranslateStream(ctx, to, from, req.Model, bytes.Clone(opts.OriginalRequest), body, bytes.Clone(line), &param)
+			for i := range chunks {
+				out <- cliproxyexecutor.StreamChunk{Payload: []byte(chunks[i])}
+			}
+		}
+
+		if errScan := scanner.Err(); errScan != nil {
+			recordAPIResponseError(ctx, e.cfg, errScan)
+			reporter.publishFailure(ctx)
+			out <- cliproxyexecutor.StreamChunk{Err: errScan}
+		} else {
+			reporter.ensurePublished(ctx)
+		}
+	}()
+
+	return stream, nil
+}
+
+// CountTokens is not supported for GitHub Copilot.
+func (e *GitHubCopilotExecutor) CountTokens(_ context.Context, _ *cliproxyauth.Auth, _ cliproxyexecutor.Request, _ cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {
+	return cliproxyexecutor.Response{}, statusErr{code: http.StatusNotImplemented, msg: "count tokens not supported for github-copilot"}
+}
+
+// Refresh validates the GitHub token is still working.
+// GitHub OAuth tokens don't expire traditionally, so we just validate.
+func (e *GitHubCopilotExecutor) Refresh(ctx context.Context, auth *cliproxyauth.Auth) (*cliproxyauth.Auth, error) {
+	if auth == nil {
+		return nil, statusErr{code: http.StatusUnauthorized, msg: "missing auth"}
+	}
+
+	// Get the GitHub access token
+	accessToken := metaStringValue(auth.Metadata, "access_token")
+	if accessToken == "" {
+		return auth, nil
+	}
+
+	// Validate the token can still get a Copilot API token
+	copilotAuth := copilotauth.NewCopilotAuth(e.cfg)
+	_, err := copilotAuth.GetCopilotAPIToken(ctx, accessToken)
+	if err != nil {
+		return nil, statusErr{code: http.StatusUnauthorized, msg: fmt.Sprintf("github-copilot token validation failed: %v", err)}
+	}
+
+	return auth, nil
+}
+
+// ensureAPIToken gets or refreshes the Copilot API token.
+func (e *GitHubCopilotExecutor) ensureAPIToken(ctx context.Context, auth *cliproxyauth.Auth) (string, error) {
+	if auth == nil {
+		return "", statusErr{code: http.StatusUnauthorized, msg: "missing auth"}
+	}
+
+	// Get the GitHub access token
+	accessToken := metaStringValue(auth.Metadata, "access_token")
+	if accessToken == "" {
+		return "", statusErr{code: http.StatusUnauthorized, msg: "missing github access token"}
+	}
+
+	// Check for cached API token using thread-safe access
+	e.mu.RLock()
+	if cached, ok := e.cache[accessToken]; ok && cached.expiresAt.After(time.Now().Add(tokenExpiryBuffer)) {
+		e.mu.RUnlock()
+		return cached.token, nil
+	}
+	e.mu.RUnlock()
+
+	// Get a new Copilot API token
+	copilotAuth := copilotauth.NewCopilotAuth(e.cfg)
+	apiToken, err := copilotAuth.GetCopilotAPIToken(ctx, accessToken)
+	if err != nil {
+		return "", statusErr{code: http.StatusUnauthorized, msg: fmt.Sprintf("failed to get copilot api token: %v", err)}
+	}
+
+	// Cache the token with thread-safe access
+	expiresAt := time.Now().Add(githubCopilotTokenCacheTTL)
+	if apiToken.ExpiresAt > 0 {
+		expiresAt = time.Unix(apiToken.ExpiresAt, 0)
+	}
+	e.mu.Lock()
+	e.cache[accessToken] = &cachedAPIToken{
+		token:     apiToken.Token,
+		expiresAt: expiresAt,
+	}
+	e.mu.Unlock()
+
+	return apiToken.Token, nil
+}
+
+// applyHeaders sets the required headers for GitHub Copilot API requests.
+func (e *GitHubCopilotExecutor) applyHeaders(r *http.Request, apiToken string) {
+	r.Header.Set("Content-Type", "application/json")
+	r.Header.Set("Authorization", "Bearer "+apiToken)
+	r.Header.Set("Accept", "application/json")
+	r.Header.Set("User-Agent", copilotUserAgent)
+	r.Header.Set("Editor-Version", copilotEditorVersion)
+	r.Header.Set("Editor-Plugin-Version", copilotPluginVersion)
+	r.Header.Set("Openai-Intent", copilotOpenAIIntent)
+	r.Header.Set("Copilot-Integration-Id", copilotIntegrationID)
+	r.Header.Set("X-Request-Id", uuid.NewString())
+}
+
+// normalizeModel is a no-op as GitHub Copilot accepts model names directly.
+// Model mapping should be done at the registry level if needed.
+func (e *GitHubCopilotExecutor) normalizeModel(_ string, body []byte) []byte {
+	return body
+}
+
+// isHTTPSuccess checks if the status code indicates success (2xx).
+func isHTTPSuccess(statusCode int) bool {
+	return statusCode >= 200 && statusCode < 300
+}

internal/runtime/executor/proxy_helpers.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
@@ -14,11 +15,19 @@ import (
 	"golang.org/x/net/proxy"
 )
 
+// httpClientCache caches HTTP clients by proxy URL to enable connection reuse
+var (
+	httpClientCache      = make(map[string]*http.Client)
+	httpClientCacheMutex sync.RWMutex
+)
+
 // newProxyAwareHTTPClient creates an HTTP client with proper proxy configuration priority:
 // 1. Use auth.ProxyURL if configured (highest priority)
 // 2. Use cfg.ProxyURL if auth proxy is not configured
 // 3. Use RoundTripper from context if neither are configured
 //
+// This function caches HTTP clients by proxy URL to enable TCP/TLS connection reuse.
+//
 // Parameters:
 //   - ctx: The context containing optional RoundTripper
 //   - cfg: The application configuration
@@ -28,11 +37,6 @@ import (
 // Returns:
 //   - *http.Client: An HTTP client with configured proxy or transport
 func newProxyAwareHTTPClient(ctx context.Context, cfg *config.Config, auth *cliproxyauth.Auth, timeout time.Duration) *http.Client {
-	httpClient := &http.Client{}
-	if timeout > 0 {
-		httpClient.Timeout = timeout
-	}
-
 	// Priority 1: Use auth.ProxyURL if configured
 	var proxyURL string
 	if auth != nil {
@@ -44,11 +48,39 @@ func newProxyAwareHTTPClient(ctx context.Context, cfg *config.Config, auth *clip
 		proxyURL = strings.TrimSpace(cfg.ProxyURL)
 	}
 
+	// Build cache key from proxy URL (empty string for no proxy)
+	cacheKey := proxyURL
+
+	// Check cache first
+	httpClientCacheMutex.RLock()
+	if cachedClient, ok := httpClientCache[cacheKey]; ok {
+		httpClientCacheMutex.RUnlock()
+		// Return a wrapper with the requested timeout but shared transport
+		if timeout > 0 {
+			return &http.Client{
+				Transport: cachedClient.Transport,
+				Timeout:   timeout,
+			}
+		}
+		return cachedClient
+	}
+	httpClientCacheMutex.RUnlock()
+
+	// Create new client
+	httpClient := &http.Client{}
+	if timeout > 0 {
+		httpClient.Timeout = timeout
+	}
+
 	// If we have a proxy URL configured, set up the transport
 	if proxyURL != "" {
 		transport := buildProxyTransport(proxyURL)
 		if transport != nil {
 			httpClient.Transport = transport
+			// Cache the client
+			httpClientCacheMutex.Lock()
+			httpClientCache[cacheKey] = httpClient
+			httpClientCacheMutex.Unlock()
 			return httpClient
 		}
 		// If proxy setup failed, log and fall through to context RoundTripper
@@ -60,6 +92,13 @@ func newProxyAwareHTTPClient(ctx context.Context, cfg *config.Config, auth *clip
 		httpClient.Transport = rt
 	}
 
+	// Cache the client for no-proxy case
+	if proxyURL == "" {
+		httpClientCacheMutex.Lock()
+		httpClientCache[cacheKey] = httpClient
+		httpClientCacheMutex.Unlock()
+	}
+
 	return httpClient
 }
 

internal/runtime/executor/token_helpers.go

@@ -2,43 +2,109 @@ package executor
 
 import (
 	"fmt"
+	"regexp"
+	"strconv"
 	"strings"
+	"sync"
 
 	"github.com/tidwall/gjson"
 	"github.com/tiktoken-go/tokenizer"
 )
 
+// tokenizerCache stores tokenizer instances to avoid repeated creation
+var tokenizerCache sync.Map
+
+// TokenizerWrapper wraps a tokenizer codec with an adjustment factor for models
+// where tiktoken may not accurately estimate token counts (e.g., Claude models)
+type TokenizerWrapper struct {
+	Codec            tokenizer.Codec
+	AdjustmentFactor float64 // 1.0 means no adjustment, >1.0 means tiktoken underestimates
+}
+
+// Count returns the token count with adjustment factor applied
+func (tw *TokenizerWrapper) Count(text string) (int, error) {
+	count, err := tw.Codec.Count(text)
+	if err != nil {
+		return 0, err
+	}
+	if tw.AdjustmentFactor != 1.0 && tw.AdjustmentFactor > 0 {
+		return int(float64(count) * tw.AdjustmentFactor), nil
+	}
+	return count, nil
+}
+
+// getTokenizer returns a cached tokenizer for the given model.
+// This improves performance by avoiding repeated tokenizer creation.
+func getTokenizer(model string) (*TokenizerWrapper, error) {
+	// Check cache first
+	if cached, ok := tokenizerCache.Load(model); ok {
+		return cached.(*TokenizerWrapper), nil
+	}
+
+	// Cache miss, create new tokenizer
+	wrapper, err := tokenizerForModel(model)
+	if err != nil {
+		return nil, err
+	}
+
+	// Store in cache (use LoadOrStore to handle race conditions)
+	actual, _ := tokenizerCache.LoadOrStore(model, wrapper)
+	return actual.(*TokenizerWrapper), nil
+}
+
 // tokenizerForModel returns a tokenizer codec suitable for an OpenAI-style model id.
-func tokenizerForModel(model string) (tokenizer.Codec, error) {
+// For Claude models, applies a 1.1 adjustment factor since tiktoken may underestimate.
+func tokenizerForModel(model string) (*TokenizerWrapper, error) {
 	sanitized := strings.ToLower(strings.TrimSpace(model))
+
+	// Claude models use cl100k_base with 1.1 adjustment factor
+	// because tiktoken may underestimate Claude's actual token count
+	if strings.Contains(sanitized, "claude") || strings.HasPrefix(sanitized, "kiro-") || strings.HasPrefix(sanitized, "amazonq-") {
+		enc, err := tokenizer.Get(tokenizer.Cl100kBase)
+		if err != nil {
+			return nil, err
+		}
+		return &TokenizerWrapper{Codec: enc, AdjustmentFactor: 1.1}, nil
+	}
+
+	var enc tokenizer.Codec
+	var err error
+
 	switch {
 	case sanitized == "":
-		return tokenizer.Get(tokenizer.Cl100kBase)
-	case strings.HasPrefix(sanitized, "gpt-5"):
-		return tokenizer.ForModel(tokenizer.GPT5)
+		enc, err = tokenizer.Get(tokenizer.Cl100kBase)
+	case strings.HasPrefix(sanitized, "gpt-5.2"):
+		enc, err = tokenizer.ForModel(tokenizer.GPT5)
 	case strings.HasPrefix(sanitized, "gpt-5.1"):
-		return tokenizer.ForModel(tokenizer.GPT5)
+		enc, err = tokenizer.ForModel(tokenizer.GPT5)
+	case strings.HasPrefix(sanitized, "gpt-5"):
+		enc, err = tokenizer.ForModel(tokenizer.GPT5)
 	case strings.HasPrefix(sanitized, "gpt-4.1"):
-		return tokenizer.ForModel(tokenizer.GPT41)
+		enc, err = tokenizer.ForModel(tokenizer.GPT41)
 	case strings.HasPrefix(sanitized, "gpt-4o"):
-		return tokenizer.ForModel(tokenizer.GPT4o)
+		enc, err = tokenizer.ForModel(tokenizer.GPT4o)
 	case strings.HasPrefix(sanitized, "gpt-4"):
-		return tokenizer.ForModel(tokenizer.GPT4)
+		enc, err = tokenizer.ForModel(tokenizer.GPT4)
 	case strings.HasPrefix(sanitized, "gpt-3.5"), strings.HasPrefix(sanitized, "gpt-3"):
-		return tokenizer.ForModel(tokenizer.GPT35Turbo)
+		enc, err = tokenizer.ForModel(tokenizer.GPT35Turbo)
 	case strings.HasPrefix(sanitized, "o1"):
-		return tokenizer.ForModel(tokenizer.O1)
+		enc, err = tokenizer.ForModel(tokenizer.O1)
 	case strings.HasPrefix(sanitized, "o3"):
-		return tokenizer.ForModel(tokenizer.O3)
+		enc, err = tokenizer.ForModel(tokenizer.O3)
 	case strings.HasPrefix(sanitized, "o4"):
-		return tokenizer.ForModel(tokenizer.O4Mini)
+		enc, err = tokenizer.ForModel(tokenizer.O4Mini)
 	default:
-		return tokenizer.Get(tokenizer.O200kBase)
+		enc, err = tokenizer.Get(tokenizer.O200kBase)
 	}
+
+	if err != nil {
+		return nil, err
+	}
+	return &TokenizerWrapper{Codec: enc, AdjustmentFactor: 1.0}, nil
 }
 
 // countOpenAIChatTokens approximates prompt tokens for OpenAI chat completions payloads.
-func countOpenAIChatTokens(enc tokenizer.Codec, payload []byte) (int64, error) {
+func countOpenAIChatTokens(enc *TokenizerWrapper, payload []byte) (int64, error) {
 	if enc == nil {
 		return 0, fmt.Errorf("encoder is nil")
 	}
@@ -62,11 +128,206 @@ func countOpenAIChatTokens(enc tokenizer.Codec, payload []byte) (int64, error) {
 		return 0, nil
 	}
 
+	// Count text tokens
 	count, err := enc.Count(joined)
 	if err != nil {
 		return 0, err
 	}
-	return int64(count), nil
+
+	// Extract and add image tokens from placeholders
+	imageTokens := extractImageTokens(joined)
+
+	return int64(count) + int64(imageTokens), nil
+}
+
+// countClaudeChatTokens approximates prompt tokens for Claude API chat completions payloads.
+// This handles Claude's message format with system, messages, and tools.
+// Image tokens are estimated based on image dimensions when available.
+func countClaudeChatTokens(enc *TokenizerWrapper, payload []byte) (int64, error) {
+	if enc == nil {
+		return 0, fmt.Errorf("encoder is nil")
+	}
+	if len(payload) == 0 {
+		return 0, nil
+	}
+
+	root := gjson.ParseBytes(payload)
+	segments := make([]string, 0, 32)
+
+	// Collect system prompt (can be string or array of content blocks)
+	collectClaudeSystem(root.Get("system"), &segments)
+
+	// Collect messages
+	collectClaudeMessages(root.Get("messages"), &segments)
+
+	// Collect tools
+	collectClaudeTools(root.Get("tools"), &segments)
+
+	joined := strings.TrimSpace(strings.Join(segments, "\n"))
+	if joined == "" {
+		return 0, nil
+	}
+
+	// Count text tokens
+	count, err := enc.Count(joined)
+	if err != nil {
+		return 0, err
+	}
+
+	// Extract and add image tokens from placeholders
+	imageTokens := extractImageTokens(joined)
+
+	return int64(count) + int64(imageTokens), nil
+}
+
+// imageTokenPattern matches [IMAGE:xxx tokens] format for extracting estimated image tokens
+var imageTokenPattern = regexp.MustCompile(`\[IMAGE:(\d+) tokens\]`)
+
+// extractImageTokens extracts image token estimates from placeholder text.
+// Placeholders are in the format [IMAGE:xxx tokens] where xxx is the estimated token count.
+func extractImageTokens(text string) int {
+	matches := imageTokenPattern.FindAllStringSubmatch(text, -1)
+	total := 0
+	for _, match := range matches {
+		if len(match) > 1 {
+			if tokens, err := strconv.Atoi(match[1]); err == nil {
+				total += tokens
+			}
+		}
+	}
+	return total
+}
+
+// estimateImageTokens calculates estimated tokens for an image based on dimensions.
+// Based on Claude's image token calculation: tokens ≈ (width * height) / 750
+// Minimum 85 tokens, maximum 1590 tokens (for 1568x1568 images).
+func estimateImageTokens(width, height float64) int {
+	if width <= 0 || height <= 0 {
+		// No valid dimensions, use default estimate (medium-sized image)
+		return 1000
+	}
+
+	tokens := int(width * height / 750)
+
+	// Apply bounds
+	if tokens < 85 {
+		tokens = 85
+	}
+	if tokens > 1590 {
+		tokens = 1590
+	}
+
+	return tokens
+}
+
+// collectClaudeSystem extracts text from Claude's system field.
+// System can be a string or an array of content blocks.
+func collectClaudeSystem(system gjson.Result, segments *[]string) {
+	if !system.Exists() {
+		return
+	}
+	if system.Type == gjson.String {
+		addIfNotEmpty(segments, system.String())
+		return
+	}
+	if system.IsArray() {
+		system.ForEach(func(_, block gjson.Result) bool {
+			blockType := block.Get("type").String()
+			if blockType == "text" || blockType == "" {
+				addIfNotEmpty(segments, block.Get("text").String())
+			}
+			// Also handle plain string blocks
+			if block.Type == gjson.String {
+				addIfNotEmpty(segments, block.String())
+			}
+			return true
+		})
+	}
+}
+
+// collectClaudeMessages extracts text from Claude's messages array.
+func collectClaudeMessages(messages gjson.Result, segments *[]string) {
+	if !messages.Exists() || !messages.IsArray() {
+		return
+	}
+	messages.ForEach(func(_, message gjson.Result) bool {
+		addIfNotEmpty(segments, message.Get("role").String())
+		collectClaudeContent(message.Get("content"), segments)
+		return true
+	})
+}
+
+// collectClaudeContent extracts text from Claude's content field.
+// Content can be a string or an array of content blocks.
+// For images, estimates token count based on dimensions when available.
+func collectClaudeContent(content gjson.Result, segments *[]string) {
+	if !content.Exists() {
+		return
+	}
+	if content.Type == gjson.String {
+		addIfNotEmpty(segments, content.String())
+		return
+	}
+	if content.IsArray() {
+		content.ForEach(func(_, part gjson.Result) bool {
+			partType := part.Get("type").String()
+			switch partType {
+			case "text":
+				addIfNotEmpty(segments, part.Get("text").String())
+			case "image":
+				// Estimate image tokens based on dimensions if available
+				source := part.Get("source")
+				if source.Exists() {
+					width := source.Get("width").Float()
+					height := source.Get("height").Float()
+					if width > 0 && height > 0 {
+						tokens := estimateImageTokens(width, height)
+						addIfNotEmpty(segments, fmt.Sprintf("[IMAGE:%d tokens]", tokens))
+					} else {
+						// No dimensions available, use default estimate
+						addIfNotEmpty(segments, "[IMAGE:1000 tokens]")
+					}
+				} else {
+					// No source info, use default estimate
+					addIfNotEmpty(segments, "[IMAGE:1000 tokens]")
+				}
+			case "tool_use":
+				addIfNotEmpty(segments, part.Get("id").String())
+				addIfNotEmpty(segments, part.Get("name").String())
+				if input := part.Get("input"); input.Exists() {
+					addIfNotEmpty(segments, input.Raw)
+				}
+			case "tool_result":
+				addIfNotEmpty(segments, part.Get("tool_use_id").String())
+				collectClaudeContent(part.Get("content"), segments)
+			case "thinking":
+				addIfNotEmpty(segments, part.Get("thinking").String())
+			default:
+				// For unknown types, try to extract any text content
+				if part.Type == gjson.String {
+					addIfNotEmpty(segments, part.String())
+				} else if part.Type == gjson.JSON {
+					addIfNotEmpty(segments, part.Raw)
+				}
+			}
+			return true
+		})
+	}
+}
+
+// collectClaudeTools extracts text from Claude's tools array.
+func collectClaudeTools(tools gjson.Result, segments *[]string) {
+	if !tools.Exists() || !tools.IsArray() {
+		return
+	}
+	tools.ForEach(func(_, tool gjson.Result) bool {
+		addIfNotEmpty(segments, tool.Get("name").String())
+		addIfNotEmpty(segments, tool.Get("description").String())
+		if inputSchema := tool.Get("input_schema"); inputSchema.Exists() {
+			addIfNotEmpty(segments, inputSchema.Raw)
+		}
+		return true
+	})
 }
 
 // buildOpenAIUsageJSON returns a minimal usage structure understood by downstream translators.

internal/translator/claude/openai/chat-completions/claude_openai_response.go

@@ -50,6 +50,10 @@ type ToolCallAccumulator struct {
 // Returns:
 //   - []string: A slice of strings, each containing an OpenAI-compatible JSON response
 func ConvertClaudeResponseToOpenAI(_ context.Context, modelName string, originalRequestRawJSON, requestRawJSON, rawJSON []byte, param *any) []string {
+	var localParam any
+	if param == nil {
+		param = &localParam
+	}
 	if *param == nil {
 		*param = &ConvertAnthropicResponseToOpenAIParams{
 			CreatedAt:    0,