Wraps check-issue-refs.sh and check-comment-blocks.sh so a push that
would fail the tracker-tag or comment-block CI jobs is caught locally
before it reaches the remote — eliminating the fix-and-repush round-trip.
Install once per clone:
ln -sf ../../scripts/pre-push .git/hooks/pre-push
Also adds a one-liner hint to CLAUDE.md so it surfaces in every
agent's context at session start.
