v0.2.3

New features

• Subdirectory support — lat.md/ vault can now have nested directories with vault-relative section IDs (e.g.
  guides/setup#Install)
• Obsidian-style short refs — [[setup#Install]] resolves automatically when the file stem is unique; ambiguous
  refs produce actionable error messages with candidate paths
• Directory index validation — lat check index enforces that every folder has a .md index file with a
  bullet-point listing of contents
• Shared file walker — single walkEntries() with .gitignore support and FS memoization
• Automated release workflow — publish.yml with npm trusted publishing (OIDC, no secrets)

Improvements

• Structured error output — check errors render as a markdown-like bullet list with indented context
• Error fixture naming convention — test cases that assert errors use error- prefix
• Test conventions documented in lat.md/tests/tests.md
• lat.md/tests/ split from single file into per-topic test spec files

Docs

• npm badge in README
• AGENTS.md template synced and dogfooded
• Website: OG tags, mobile tweaks, open-source mention