R77.F2 Contract — Section `index.md` stubs

Behavioral contract

Create 10 new index.md files in the folders listed in docs/audits/r77-f2-section-indexes-audit.md. Modify zero existing files.

Frontmatter shape (exact, per-file)

---
title: <Title>
tags: [<relevant tags>]
type: section-index
updated: 2026-04-18
---

No nav_order, no parent, no has_children. Repo convention is 6/6 existing section-index files without these fields.

Content bounds

Every file ≤ 30 lines total (including frontmatter).
Content: H1 + 1–2 sentence purpose + sibling file list + “See also”.
No invented content — sibling descriptions come from each file’s existing title: or H1; phase status comes from colibri_code: frontmatter where applicable.
Links are repo-relative (.md form; Jekyll + jekyll-relative-links plugin handles the .md → .html rewrite at build).

Non-goals

Not changing _config.yml.
Not editing any concept doc, ADR, contract, or heritage extraction.
Not adding nav_order anywhere.
Not fixing colibri-hero.js (R77.F1).

Gate

npm run build && npm run lint && npm test green (docs-only change — no runtime impact expected).