Export, versions, and forks

Each runbook detail page offers Export Markdown, which downloads the same file validated in CI (including YAML frontmatter). Exports are mirrored under /_export/runbooks/… at build time so links work on static hosts.

Semantic versions live in frontmatter (version). When upstream content changes meaningfully, authors bump per editorial/versioning.md. A multi-version selector in the reader is deferred until version history is stored outside Git tags alone.

Forks (customer-scoped copies with merge-from-upstream) require the FastAPI + Postgres service from Phase 1B.3 of the execution plan — not part of this static site.