ci: auto-sync CHANGELOG to README via GitHub Actions

Extracts the 3 most recent version sections from CHANGELOG.md and
injects them between <!-- CHANGELOG:START/END --> markers in README.md.
Triggered on push to master when CHANGELOG.md changes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/sync-changelog.yml

@@ -0,0 +1,62 @@
+name: Sync CHANGELOG to README
+
+on:
+  push:
+    branches: [master]
+    paths: [CHANGELOG.md]
+
+permissions:
+  contents: write
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Extract recent changelog and update README
+        run: |
+          # Extract the first 3 version sections from CHANGELOG.md
+          # (everything between the first "## " heading and the 4th "## " heading)
+          python3 - <<'PYEOF'
+          import re, pathlib
+
+          changelog = pathlib.Path("CHANGELOG.md").read_text(encoding="utf-8")
+          readme = pathlib.Path("README.md").read_text(encoding="utf-8")
+
+          # Split changelog into version sections by "## " headings
+          # Skip the title lines before the first "## "
+          sections = re.split(r"(?=^## )", changelog, flags=re.MULTILINE)
+          # Filter to actual version sections (start with "## ")
+          versions = [s for s in sections if s.startswith("## ")]
+
+          # Take up to 3 most recent versions
+          recent = versions[:3]
+          if not recent:
+              print("No version sections found in CHANGELOG.md")
+              exit(0)
+
+          # Build the replacement content
+          content = "\n".join(s.rstrip() for s in recent)
+
+          # Replace between markers
+          pattern = r"(<!-- CHANGELOG:START -->).*?(<!-- CHANGELOG:END -->)"
+          replacement = f"<!-- CHANGELOG:START -->\n{content}\n<!-- CHANGELOG:END -->"
+          new_readme = re.sub(pattern, replacement, readme, flags=re.DOTALL)
+
+          if new_readme == readme:
+              print("README unchanged")
+              exit(0)
+
+          pathlib.Path("README.md").write_text(new_readme, encoding="utf-8")
+          print(f"Updated README with {len(recent)} changelog section(s)")
+          PYEOF
+
+      - name: Commit if changed
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git diff --quiet README.md && echo "No changes" && exit 0
+          git add README.md
+          git commit -m "docs: auto-sync changelog to README [skip ci]"
+          git push

README.md

@@ -318,23 +318,10 @@ server:
 
 ## 📝 最近更新 (Recent Changes)
 
-> 完整更新日志请查看 [CHANGELOG.md](./CHANGELOG.md)
+> 完整更新日志请查看 [CHANGELOG.md](./CHANGELOG.md)，以下内容由 CI 自动同步。
 
-### 最新
-
-- **图片输入支持** — OpenAI（`image_url`）、Anthropic（`image/base64`）、Gemini（`inlineData`）三种格式的图片内容透传到 Codex 后端
-- **每窗口用量计数器** — Dashboard 主显示当前窗口的请求数和 Token 用量，窗口过期自动归零
-- **空响应自动重试** — Codex 返回空响应时自动换号重试（最多 3 次）
-- **动态模型列表** — 后台自动从 Codex 后端获取模型目录，与静态 YAML 合并
-- **工具 schema 修复** — MCP 工具缺少 `properties` 字段时不再 400 报错
-
-### v0.8.0
-
-- 原生 function_call / tool_calls 支持（所有协议）
-
-### v0.7.0
-
-- `developer` 角色支持、数组格式 content、模型响应自动过滤 Codex Desktop 指令
+<!-- CHANGELOG:START -->
+<!-- CHANGELOG:END -->
 
 ## 📄 许可协议 (License)