Add TestTau agent skill

README.md

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+# TestTau Agent Skill
+
+TestTau gives AI agents disposable email inboxes and webhook capture endpoints for QA, CI, signup, checkout, and integration tests.
+
+Agents can:
+
+- create public disposable inboxes at `<inbox>@mail.testtau.com`;
+- wait for email and fetch parsed JSON;
+- use private API-key protected inboxes for signed-in users;
+- capture HTTP requests at `https://hook.testtau.com/<hookId>`;
+- inspect, replay, and assert webhook captures with JSON Schema.
+
+Canonical hosted skill:
+
+- `https://testtau.com/skills/testtau/SKILL.md`
+- `https://testtau.com/skills/testtau/references/api.md`
+- `https://testtau.com/llms.txt`
+
+## Install
+
+Copy this folder into an agent's skills directory, or point the agent to the hosted `SKILL.md` URL.
+
+For catalogs that ingest skill packages, use this folder as the package root:
+
+```text
+agent-skills/testtau
+```
+
+## Quick Start
+
+```bash
+INBOX="agent-login-$(date +%s)"
+echo "Send mail to $INBOX@mail.testtau.com"
+curl -fsS "https://mail.testtau.com/i/$INBOX/api/wait?timeout=15000"
+```
+
+```bash
+HOOK="agent-hook-$(date +%s)"
+curl -fsS -X POST "https://hook.testtau.com/$HOOK" \
+  -H "content-type: application/json" \
+  -d '{"event":"agent.test"}'
+curl -fsS "https://hook.testtau.com/_/$HOOK/api/list"
+```
+
+Private mail and private hooks require:
+
+```text
+Authorization: Bearer <key>
+```

SKILL.md

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+---
+name: testtau
+version: 1.0.0
+homepage: https://testtau.com/
+description: Use TestTau when an AI agent needs disposable email inboxes, private API-key protected test inboxes, webhook capture, request inspection, replay, or JSON Schema assertions for QA, CI, signup, checkout, and integration testing.
+---
+
+# TestTau
+
+TestTau gives agents disposable mail and webhook endpoints for tests:
+
+- Public mail: send to `<inbox>@mail.testtau.com`, inspect at `https://mail.testtau.com/i/<inbox>`.
+- Public hooks: send to `https://hook.testtau.com/<hookId>`, inspect at `https://hook.testtau.com/_/<hookId>`.
+- Private mail and hooks: use the user's TestTau Account page to create an API key, then send reads/config requests with `Authorization: Bearer <key>`.
+
+Use a unique name per task, for example `agent-<purpose>-<short-random>`. Valid names start with a lowercase letter or number and may contain lowercase letters, numbers, `.`, `_`, `+`, or `-`.
+
+## Public Disposable Mail
+
+Use public mail when the inbox can be readable by anyone who knows the name.
+
+1. Choose an inbox name, such as `agent-login-7k3p`.
+2. Tell the system under test to email `agent-login-7k3p@mail.testtau.com`.
+3. Wait for the message:
+
+```bash
+curl -fsS "https://mail.testtau.com/i/agent-login-7k3p/api/wait?timeout=15000&subject=Verify"
+```
+
+4. Read parsed JSON:
+
+```bash
+curl -fsS "https://mail.testtau.com/i/agent-login-7k3p/api/message/<messageId>/json"
+```
+
+Important fields include `fromAddr`, `toAddr`, `subject`, `textBody`, `htmlBody`, `preview`, `attachments`, and `links.raw`.
+
+## Private Mail
+
+Use private mail when the test email must not be visible in a public inbox.
+
+1. Ask the user for their TestTau private inbox name and API key, or direct them to `https://testtau.com/account`.
+2. Send mail to `<privateInbox>@mail.testtau.com`.
+3. Read with a bearer token:
+
+```bash
+curl -fsS \
+  -H "Authorization: Bearer $TESTTAU_MAIL_KEY" \
+  "https://mail.testtau.com/private/i/<privateInbox>/api/wait?timeout=15000&subject=Verify"
+```
+
+Never put private keys in URLs. Use `Authorization: Bearer`.
+
+## Public Webhook Capture
+
+Use public hooks when captured requests can be visible to anyone with the hook id.
+
+```bash
+HOOK_ID="agent-webhook-7k3p"
+curl -fsS -X POST "https://hook.testtau.com/$HOOK_ID" \
+  -H "content-type: application/json" \
+  -d '{"event":"agent.test","ok":true}'
+
+curl -fsS "https://hook.testtau.com/_/$HOOK_ID/api/list"
+```
+
+Open `https://hook.testtau.com/_/<hookId>` for the live inspector.
+
+## Private Hooks
+
+Use private hooks when inspection, replay, config, wipe, and assertions must require an API key.
+
+```bash
+curl -fsS -X POST "https://hook.testtau.com/private/<hookId>" \
+  -H "content-type: application/json" \
+  -d '{"event":"agent.private"}'
+
+curl -fsS \
+  -H "Authorization: Bearer $TESTTAU_HOOK_KEY" \
+  "https://hook.testtau.com/private/_/<hookId>/api/list"
+```
+
+## Schema Assertions
+
+For webhook contract tests, configure a JSON Schema and use the assert endpoint as a CI gate.
+
+```bash
+START="$(date +%s%3N)"
+
+curl -fsS -X PUT "https://hook.testtau.com/_/<hookId>/api/config" \
+  -H "content-type: application/json" \
+  -d '{"schema":"{\"type\":\"object\",\"required\":[\"event\"]}","schemaFailMode":"capture"}'
+
+# Trigger the system under test here.
+
+curl -fsS "https://hook.testtau.com/_/<hookId>/api/assert?since=$START&min_count=1"
+```
+
+For private hooks, add `-H "Authorization: Bearer $TESTTAU_HOOK_KEY"` to config, list, request, replay, wipe, and assert calls.
+
+## Limits And Safety
+
+- Public captures are disposable and should not receive production secrets, PII, or credentials.
+- Public mail and hooks are name-based; anyone with the name can inspect them.
+- Signed-in private tools require bearer tokens for reads and management.
+- Current free private limits: 100 private mail messages per account period and 1,000 private hook captures per account period.
+- Mail retention is 48 hours, public inbox storage is 100 messages, mail attachments are capped at 5 MB, and hook request bodies are capped at 1 MiB.
+
+## When Done
+
+Return the exact inbox or hook id used, the inspect URL, and the message/request id if one was captured. If a wait timed out, report that explicitly and include the URL the user can open manually.

agents/openai.yaml

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+interface:
+  display_name: "TestTau"
+  short_description: "Disposable mail and webhook capture for tests"
+  brand_color: "#6366F1"
+  default_prompt: "Use $testtau to create a disposable inbox or webhook, wait for a capture, and report the inspect URL."
+
+policy:
+  allow_implicit_invocation: true

references/api.md

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+# TestTau API Reference For Agents
+
+## Mail
+
+Public base path:
+
+```text
+https://mail.testtau.com/i/<inbox>/api
+```
+
+Private base path:
+
+```text
+https://mail.testtau.com/private/i/<inbox>/api
+Authorization: Bearer <mail-key>
+```
+
+Useful endpoints:
+
+- `GET /list` - list recent messages.
+- `GET /quota` - return stored message quota.
+- `GET /wait?timeout=15000&subject=<text>&text=<text>` - long-poll for a matching message.
+- `GET /message/<messageId>` - parsed message JSON.
+- `GET /message/<messageId>/json` - parsed message JSON.
+- `GET /message/<messageId>/raw` - raw `.eml`.
+- `DELETE /message/<messageId>` - delete one message.
+- `DELETE /all` - wipe inbox.
+
+## Hooks
+
+Public capture:
+
+```text
+POST https://hook.testtau.com/<hookId>
+```
+
+Public inspect API:
+
+```text
+https://hook.testtau.com/_/<hookId>/api
+```
+
+Private capture:
+
+```text
+POST https://hook.testtau.com/private/<hookId>
+```
+
+Private inspect API:
+
+```text
+https://hook.testtau.com/private/_/<hookId>/api
+Authorization: Bearer <hook-key>
+```
+
+Useful endpoints:
+
+- `GET /list` - list recent captures.
+- `GET /request/<requestId>` - capture metadata.
+- `GET /body/<requestId>` - capture body.
+- `PUT /config` - set response behavior or JSON Schema.
+- `POST /replay/<requestId>?target=<url>` - replay capture.
+- `GET /assert?since=<epochMs>&min_count=1` - CI assertion gate.
+- `DELETE /request/<requestId>` - delete one capture.
+- `DELETE /all` - wipe hook.