refactor(daemon): atomic agent-driver cutover

[gusye1234]

Why we need this PR?

Closes #

The daemon previously owned separate vendor runtime implementations, including dead backends and duplicated lifecycle logic. This made root-turn ownership, message admission, reset/model-switch replacement, stop/cleanup, and adapter extension behavior inconsistent and difficult to verify.

This PR makes one atomic cutover to a typed logical-session boundary, retains only Claude, Codex, Cursor, OpenCode, and Pi, and removes the legacy implementations in the same change.

What changed

• Added the nested workspace package @alook/agent-driver at src/daemon/agent-driver.
  • It is independently buildable and publishable for external hosts and adapter authors.
  • The daemon consumes its public SDK at build time and publishes a self-contained bundle; daemon users do not install a runtime dependency on @alook/agent-driver.
• Added public root, host, adapter-author, and testing entry points with generated API reports and an exact-head independent API-owner guard.
• Migrated Claude, Codex, Cursor, OpenCode, and Pi to the common logical-session contract.
• Removed Gemini, Kimi, Copilot, Antigravity, and the daemon-owned legacy driver implementations.
• Preserved stored removed-runtime rows as unavailable until a user explicitly switches them.
• Added session-epoch/root-turn ownership, exact-once admission and requeue semantics, reset/model-switch replacement safety, bounded stop/cleanup, and shared diagnostic scrubbing.
• Added package/build/publish checks so @alook/agent-driver can be released independently while the daemon continues to bundle the same source commit.

Current exact head: 438cccd7a1951c03cef6431d7a152f8a49b37c63.

Verification

• Independent exact-head code review: PASS.
• Full workspace typecheck, lint, tests, knip, Windows, CI Gate, and UI Playwright E2E 5/5: PASS.
• Codecov exact-head diff coverage: 100%.
• Real local-dev browser + daemon QA for Claude, Codex, Cursor, OpenCode, and Pi:
  • initial DM exact reply;
  • browser Reset and immediate post-reset DM exact reply;
  • watchdog/idle-stop and process cleanup;
  • live Cursor/OpenCode production daemon-stop cleanup with no orphan processes.
• Deterministic regressions cover child/subagent terminal isolation and the reset/model-switch old-stop/new-session race.
• Additional owner-requested real QA for four-backend subagent stability and per-capability working/burst delivery is in progress. The PR remains Draft until those results and exact-head API-owner approval are complete.

Checklist

• Tests added/updated as needed
• All current CI checks pass (the API-owner guard intentionally remains pending until an allowlisted owner approves this exact head)
• PR targets the correct branch

Impact Areas

• Shared library (@alook/shared)
• Web app (@alook/web)
• CLI (@alook/cli)
• Email Worker (@alook/email-worker)
• WebSocket DO (@alook/ws-do)
• CI/CD
• Other: @alook/daemon, @alook/agent-driver, runtime lifecycle and packaging

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!