feat: Phase 4 Implementation — 52 Integration Tests & CI/CD Pipeline (Code Quality)

[ashleyshaw]

Linked issues

Closes #2304
Relates to #2303, #2335

Changelog

Added

• PR Creation Agent Phase 4 — 52 comprehensive integration tests covering skill orchestration, GitHub workflows, error recovery, and performance edge cases

Changed

• Enhanced code quality across PR Creation Agent by removing unused parameters and conditional logic
• Improved skill implementations with CodeRabbit feedback integration

Fixed

• Removed unused mockGitHub and config parameters from orchestratePrCreation
• Removed redundant body check in frontmatter parsing conditional
• Removed unused branchType, config, mockGitHub parameters from validateAndApplyLabels
• Removed unused fs and path imports from metrics-reporter
• Removed unused owner and repo variable declarations in metrics-reporter

Removed

• Dead code and unused dependencies that improved code quality score

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Checklist (Global DoD / PR)

• All AC met and demonstrated
• Tests added/updated (52 integration tests, all passing)
• CodeRabbit feedback addressed (unused variables and conditionals removed)
• Docs/readme/changelog updated (CHANGELOG.md reference in issue links)
• Code quality reviews addressed
• CI checks pending (monitoring for results)
• Linked issues tracked

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📥 Commits

Reviewing files that changed from the base of the PR and between 233f192 and 54e40ca.

📒 Files selected for processing (2)

• agents/pr-creation-agent/skills/validate-and-apply-labels.js
• scripts/metrics/metrics-reporter.js

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[github-actions]

✅ Template check passed after update. Thanks for fixing the PR description.

[mergify]

Merge Queue Status

• ✅ Entered queue — 2026-08-24 16:16 UTC · Rule: dependabot-develop · triggered by merge protections
• ✅ Checks passed · in-place
• ✅ Merged — 2026-08-24 16:21 UTC · at 54e40caf85528d100b565687376157243d6b5c7e · squash

This pull request spent 4 minutes 32 seconds in the queue, including 3 minutes 14 seconds running CI.

Required conditions to merge

• any of [🛡 GitHub branch protection]:
  • check-success = validate-pr-template
  • check-neutral = validate-pr-template
  • check-skipped = validate-pr-template