sync-docs

# sync-docs Keep CLAUDE.md, AGENTS.md, SKILL.md, and README.md accurate after new commits land. Finds the last docs-sync point, classifies every commit since then, and writes targeted updates — no rewrite, no drift. Syncing is bidirectional: as well as adding what's new, **remove or correct anything the current codebase now contradicts** — stale paths, renamed symbols, removed fields, dead defaults. A doc that lies is worse than one that's merely incomplete. Adapt to the repo you're in. The doc set below is the common shape, not a requirement — a repo may have only a README, or add its own docs. Edit the files that exist; never create a new top-level doc (AGENTS.md, CHANGELOG.md, SKILL.md) as part of a sync — if one seems warranted, surface it to the user instead. Audience split: - **CLAUDE.md** — agent-facing dense reference (architecture, symbol/file names, `file:line` cues). Describes **current behavior**; not a history log. - **AGENTS.md** *(only if the repo already has one — check `ls -l AGENTS.md` first)* — the counterpart agent doc for other tools (e.g. Codex). A repo keeps it in one of two shapes. As a symlink to CLAUDE.md it holds no content of its own, so it needs no edit. As a real file it carries the same body content (architecture, commands, conventions) with a tool-specific intro line, so every CLAUDE.md body edit gets mirrored into it — see step 5. - **SKILL.md** *(only if the repo has one)* — operator-facing imperative guide (config knobs, setup prompts, CL...