Summary

• Document the Plan Every Code default branch and release identity #87 branch cutover blocker: origin/main already exists and diverges from local/cbusillo-overlay, so the remote branch move needs an explicit source-of-truth/admin decision
• Add cutover-ready product commands: just local-upstream-import and just local-product-health, keeping legacy aliases intact
• Prepare releases for the permanent every-code-v* tag prefix while preserving legacy overlay-v* history for release notes and triggers
• Update repo metadata to distinguish current vs planned product branches without pretending GitHub has already switched

Validation

• jq empty .github/github.json
• Ruby YAML parse for .github/workflows/binary-release.yml
• bash -n scripts/local/fork-health.sh scripts/local/generate-overlay-release-notes.sh scripts/local/update-overlay-from-upstream.sh
• just --list | rg "local-(upstream-import|product-health|overlay-update|fork-health)"
• Generated sample release notes with every-code-v0.6.98.1
• ./build-fast.sh

Blocker intentionally left for #87

Actual GitHub default-branch cutover is not performed in this PR because origin/main already exists at ee5fd6dd9c, origin/local/cbusillo-overlay is at 89d88f62e5, and they diverge heavily. The next step is an explicit admin/source-of-truth decision to make main point at the current product branch, transfer branch protection, update the GitHub default branch, and only then retire or redirect the old branch.

Refs #87
Parent #85