feat(reasonix): add rules + skills adapters, expand hook events, MCP timeouts (#2157)

[dyoshikawa]

Summary

Follow up DeepSeek-Reasonix upstream updates (#2157). Reasonix already emitted MCP, commands, hooks, and permissions; this PR closes the remaining gaps. All four upstream facts were verified against primary sources (internal/skill/skill.go, internal/memory/doc.go, docs/SPEC.md, docs/DESKTOP_HOOKS.zh-CN.md) before implementing.

Changes

1. rules — new ReasonixRule adapter

Reasonix auto-injects a hierarchical instruction document, reading its vendor-specific REASONIX.md (alongside the cross-tool AGENTS.md/CLAUDE.md). rulesync now emits REASONIX.md at the project root (project) / ~/.reasonix/REASONIX.md (global) and folds non-root rules into that single file, mirroring the codexcli target.

2. skills — new ReasonixSkill adapter

Reasonix discovers Anthropic-style directory-layout skills (<name>/SKILL.md) under .reasonix/skills/ (project) and ~/.reasonix/skills/ (global). rulesync models the portable name/description frontmatter; the schema is loose so any extra keys on an imported SKILL.md survive the round-trip.

3. hooks — four → eight mapped events

Added the four cleanly-mappable events to REASONIX_HOOK_EVENTS / CANONICAL_TO_REASONIX_EVENT_NAMES: sessionStart ⇄ SessionStart, sessionEnd ⇄ SessionEnd, subagentStop ⇄ SubagentStop, and postModelInvocation ⇄ PostLLMCall. Notification/PreCompact have no canonical event and are left out.

4. mcp — [[plugins]] timeout passthrough

call_timeout_seconds (per-server) and tool_timeout_seconds (per-tool inline table) are added to REASONIX_PLUGIN_FIELDS so they survive round-trips.

Deferred (with reason)

• hook cwd field (marked "optional" in the issue): carrying it through would require a new canonical HookDefinition field (a permanent schema decision), so it is left out of this PR rather than smuggled in as an unmodeled key.

Wiring / generated

Registered both adapters in the per-feature tuples and processors, regenerated the supported-tools tables (README.md, docs/reference/supported-tools.md) and .gitignore, and synced docs/reference/file-formats.md (rules/skills/hooks/mcp notes) to skills/rulesync/.

Testing

• pnpm cicheck — all green (6894 unit tests, fmt, oxlint, typecheck, cspell, secretlint, all drift checks).
• pnpm test:e2e e2e-rules / e2e-skills / e2e-hooks / e2e-mcp — 381 passed. reasonix is now covered by the rules and skills Tool × Feature happy-path matrices (project + global), and the generate/import round-trips are exercised end-to-end.
• New unit tests: reasonix-rule.test.ts, reasonix-skill.test.ts.

Closes #2157

🤖 Generated with Claude Code

[dyoshikawa]

Merged. All four upstream facts were primary-source verified before implementing. Added the mid review finding's missing coverage (MCP timeout-field round-trip tests, including the nested tool_timeout_seconds table). The optional hook cwd field was deferred, as noted in the PR body, since it would require a new canonical HookDefinition field.