feat(manus): adapter for manus.im — 6 read-only commands

[LeoLin990405]

Adds an adapter for Manus, the autonomous AI agent web app at manus.im/app. Closes #1836.

Commands

All read-only, all backed by Manus's Connect-RPC backend at api.manus.im.

Command	RPC
manus status	UserService/UserInfo + GetAvailableCredits
manus list [--limit N] [--archived]	SessionService/ListSessions
manus read <uid>	SessionService/ListSessions (filter in-process)
manus credits	UserService/GetAvailableCredits
manus connectors [--limit N]	ConnectorsService/ListConnectors
manus skills	SkillService/ListSkills

Architecture

Cookie-mode adapter. The session_id cookie issued by manus.im is a JWT that Manus's own frontend re-uses as a Bearer token against the cross-origin Connect-RPC backend at api.manus.im. The adapter does the same — each command is one POST inside the manus.im page context with Authorization: Bearer ${session_id cookie}. No DOM scraping, so the surface is resilient to UI re-skins.

--limit is validated against int32.gte_lte constraints client-side so users get a clear ArgumentError (code: ARGUMENT) instead of an opaque server 400.

Scope discipline

Manus's /app route is a pure React SPA — visiting https://manus.im/app/session/<uid> returns HTTP 404, and sidebar items are <div role="button"> with empty href. Because there is no per-session URL and no confirmation dialog for destructive actions, the following are deliberately out of scope (no verifiable post-state to assert against):

• manus open <uid>
• manus new-task <prompt> / manus chat <uid> <message>
• manus pause / resume / cancel <uid>
• manus delete / archive <uid>

See docs/adapters/browser/manus.md for the full NOT-exposed list and rationale.

Verification

• clis/manus/manus.test.js — 17 cases:
  • 1× registration (all 6 commands, access: 'read')
  • 1× status (UserInfo + credits merging)
  • 5× list (default archive filter / --archived / --limit body interpolation / --limit 0 / -5 / 1.5 all rejected)
  • 3× read (happy path / uid not found / missing UID argument)
  • 1× credits (8 fields)
  • 2× connectors (all + --limit)
  • 1× skills (user-added with source=user)
  • 1× auth error propagation
  • 4× isManusUrl URL parser
• npm run test:adapter — 380 files / 3731 tests pass.
• npm run build-manifest — clean, +6 entries (manus/status, manus/list, manus/read, manus/credits, manus/connectors, manus/skills).
• Live smoke test against a real logged-in Manus account: every command returns real data end-to-end via the Browser Bridge.

$ opencli manus status
- Field: Email           Value: zhongyuelin990405@gmail.com
- Field: Display Name    Value: Lin Zhongyue
- Field: Membership Tier Value: 60
- Field: Total Credits   Value: 12311
- Field: Periodic Credits Value: 12000
- Field: Refresh Credits Value: 300

$ opencli manus list --limit 0
ok: false
error:
  code: ARGUMENT

$ opencli manus connectors --limit 3
- UID: cf19c9d0-…  Name: Apify         Brief: Connect AI agents to thousands…
- UID: 4bca3029-…  Name: Outlook Calendar
- UID: d485c6dd-…  Name: Outlook Mail