feat: sync Claude Code v2.1.226 (ccbuilder v2.55.0)

[github-actions]

Summary

	Old	New
Claude Code	v2.1.220	v2.1.226
ccbuilder	—	v2.55.0

Auto-generated by version sync workflow

Update Method

Phase	Method	Status
Version numbers	Shell (sed)	✅ Done
SKILL release backup	Shell (cp)	✅ releases/v2.54.0_20260808_SKILL.md
Content analysis	Claude Code Action	✅ Done

Claude Code Action으로 콘텐츠 분석 및 문서 업데이트 완료

Changed Files

 .claude-plugin/marketplace.json                   |   2 +-
 .claude-plugin/plugin.json                        |   2 +-
 CHANGELOG.md                                      |  46 ++
 CLAUDE.md                                         |   6 +-
 README.md                                         |   4 +-
 releases/v2.54.0_20260808_SKILL.md                | 499 ++++++++++++++++++++++
 skills/ccbuilder/SKILL.md                         |  12 +-
 skills/ccbuilder/references/official/subagents.md |   5 +-
 skills/ccbuilder/references/official/tools.md     |   4 +-
 skills/ccbuilder/references/subagents-guide.md    |  12 +-
 skills/ccbuilder/references/version-sync.md       |  52 ++-
 11 files changed, 622 insertions(+), 22 deletions(-)

Review Checklist

• SKILL.md 500줄 미만 확인
• releases/ 에 이전 버전 SKILL.md 백업 존재
• CHANGELOG.md에 실제 기능 목록 포함
• 새 기능 문서화 정확성 확인
• Breaking Changes 문서화 확인
• version-sync.md에 새 버전 추적 엔트리 추가됨