feat(acp): add CodeBuddy to the built-in external agent catalogue

[Luna Qiu (lunaqiu)]

What

Adds Tencent Cloud's CodeBuddy Code CLI to the trusted built-in catalogue of ACP-capable external agents, so it appears as a first-class option in Settings → External Agents → Add agent instead of requiring a Custom command.

Why

CodeBuddy speaks ACP natively via codebuddy --acp — the same shape as Gemini and Qwen Code — so it fits the existing catalogue with no new machinery. known-agents.ts is deliberately a pure data module, separate from the host probing logic in agent-cli-detect.ts, which means adding an agent is a data-only change.

How

Field	Value	Rationale
binary	codebuddy	Native ACP support; no adapter binary needed
acpArgs	['--acp']	Documented ACP entry point
autoApprove	null	See below
skipVersionProbe	(omitted)	codebuddy --version prints 2.137.1 and exits in ~170 ms, well inside the 2.5 s probe timeout

autoApprove is null on purpose. CodeBuddy Code is architecturally derived from Claude Code (identical slash-command surface: /agents, /bashes, /compact, …) and likewise delegates tool-permission decisions to ACP requests. There is no documented blanket auto-approve argument scoped to --acp mode, and the catalogue's contract is that only official argument-based recipes are encoded here. --dangerously-skip-permissions exists for -p batch mode but is not documented for the ACP path, so encoding it would be a guess.

Changes

• apps/server/src/modules/agent/acp/known-agents.ts — new codebuddy entry
• apps/server/src/modules/agent/acp/known-agents.test.ts — expectations updated
• docs/architecture/agent-architecture.md — catalogue list updated
• apps/docs/src/sections/ai/ExternalAgents.tsx — user-facing list updated, count nine → ten

Testing

• pnpm --filter @huabu/server test -- acp — 15 files / 113 tests passing
• pnpm --filter @huabu/server typecheck, pnpm --filter @huabu/docs typecheck — clean
• ESLint on all touched files — clean
• Manually verified in a local dev build (CodeBuddy Code 2.137.1): the agent is detected, a Profile can be created, and a conversation runs against a Space

Notes for reviewers

No changes to detection, launch, or connection logic — this is a data-only addition to the catalogue plus the documentation that mirrors it.