Release Agent: Missing release branch push before PR creation

[ashleyshaw]

Issue

Release agent creates release/vX.Y.Z branch locally but never pushes it to origin before attempting PR creation. GitHub can't see an unpushed branch, so gh pr create fails or uses wrong ref.

Impact

• PR creation fails silently (error caught at line 614, continues anyway)
• Release tag is created but no PR exists to merge to main
• Manual PR creation required, breaking orchestration

Root Cause

release.agent.js line 691–695 creates branch but missing:

git add VERSION CHANGELOG.md
git commit -m "chore(release): bump to ${nextVersion}"
git push -u origin ${releaseBranch}

Expected Behavior

1. Create release branch from develop
2. Update VERSION and CHANGELOG.md
3. Commit changes
4. Push branch to origin
5. Create PR from pushed branch to main

References

• Related audit: .github/reports/audits/RELEASE_PROCESS_AUDIT_v0_5_0.md (Issue 1.1)
• Agent spec: agents/release.agent.md (line 129–133)
• Implementation: scripts/agents/release.agent.js (line 691–695)

[linear-code]

LS-778