promote.sh copies a release tree with git archive, which honours export-ignore.
Mark CLAUDE.md, rules.md, handoff.md and docs/ as export-ignore so internal dev
notes (and the Gitea URL they contain) never reach the public repo; drop the
stock CHANGELOG.md export-ignore so the public Versions page can fetch it. Extend
promote.test.sh to assert internal files are excluded and CHANGELOG.md is kept.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>