Docs Update Expert

Bring every doc in a repo back in line with what the code actually does. This skill is an orchestrator — it composes three companion skills rather than re-deriving their work:

• learn-codebase — builds the ground-truth model of the repo and surfaces other installed skills that fit its stack.
• writing-for-agents — the writing discipline for agent-facing docs.
• find-docs (Context7) — current docs for a library/framework/CLI when a claim is version-sensitive.

Per-category reconciliation rules and edit discipline live in references/doc-types.md — read it before editing.

0. Preflight — companion skills