OKF 文档索引

Maintain a repo's Markdown docs (wiki chapters, ADRs, references) under Google's Open Knowledge Format (OKF), and find the right doc/schema fast. Two jobs. (1) Maintain docs the OKF way — each doc carries a small YAML frontmatter block as the single source of truth (type, title, tags, intent, schema_source, documents); schema detail links to the authoritative code instead of being copied into prose, so docs stop drifting and stop ballooning into thousand-line Markdown. (2) Look docs up fast — grep the literal term FIRST; only when grep is ambiguous (hits scattered across files / synonym mismatch / zero hits) run find_docs.py to rank the doc that owns the topic by frontmatter intent, or resolve a doc's schema_source straight to the code. Trigger phrases — "which doc covers X", "find the schema this doc points to", "where is endpoint/config-key X documented", "add OKF frontmatter to this doc", "lint the docs", "scaffold a new ADR/chapter". Run: scripts/run.sh find|schema|index|lint|new (or python3 scripts/find_docs.py --repo <path> ...).