CRITICAL: Add verify-fork-functions.sh — detects silent upstream code loss
from bad merges that file-level verification cannot catch. This is the
verification that would have caught the kfdwrite drop bug.
Wire it into build-preflight.sh (pre-build gate) and upgrade-forks.sh
(post-upgrade gate with automatic rollback on failure).
Fix upgrade-forks.sh:
- Fetch failures now abort instead of being silently swallowed
- Backup branch names include fork name + PID to prevent collisions
- Post-upgrade verification runs verify-fork-functions.sh and rolls
back if upstream functions are missing
Fix bump-fork.sh:
- Replace wrong 'git tag -e' with 'git rev-parse --verify refs/tags/'
- Clone failures now error explicitly instead of silent fallback
- Version sed uses proper regex escaping for + characters
- Atomic swap has rollback recovery if mv fails
- Instructions now mention fork-upstream-map.toml update
Fix sync-upstream.sh:
- Define PROJECT_ROOT before use (was crashing under set -u)
Fix build-preflight.sh:
- Add REDBEAR_SKIP_FUNCTION_CHECK gate for verify-fork-functions.sh
Kernel submodule pointer updated to 0.3.1 branch with kfdwrite restored.
