- Add ADR 0001: one SemVer version for httpd, explorer
supports every release from a minimum version, a 3-month
guideline to drop a replaced major, expand and contract,
and one API path at /api
- Treat 0.y as the major before 1.0
- Track API changes in docs/api-changes.md
- List API changes in httpd release notes
- Take the version from the release tag, not Cargo.toml
- Pass the version to the changelog script
- Link the compatibility rules from the README
- Point to the compat module from the backwards compatibility rules
