feat(git-master): add comprehensive git workflow control plugin

[moukrea]

Summary

• Add git-master, a comprehensive plugin for controlling how Claude interacts with git
• Provides configurable commit conventions, PR/MR automation, multi-agent code review, pipeline diagnostics, and multi-provider support
• Includes hierarchical YAML configuration system (per-directory, per-project, user global, plugin defaults)

What's included

Skills (7 auto-triggered workflows)

Skill	Purpose
committing	Convention-aware commit creation (Conventional Commits, Angular, Gitmoji, custom)
creating-pr	PR/MR creation with templates, auto-labels, size labels, reviewer assignment
reviewing-pr	Multi-agent review orchestration (launches adversarial + security + performance agents)
monitoring-pr	PR/MR status dashboard (pipeline, reviews, merge readiness)
fixing-pipeline	CI/CD failure diagnosis and repair (GitHub Actions, GitLab CI, etc.)
setting-up	Interactive configuration wizard
showing-status	Git + config state overview

Agents (4 specialized reviewers)

Agent	Model	Purpose
adversarial-reviewer	opus	Hostile bug-finding: edge cases, race conditions, logic errors
security-reviewer	sonnet	OWASP-focused analysis with CWE references
performance-reviewer	sonnet	N+1 queries, memory leaks, algorithmic complexity
pipeline-doctor	sonnet	Systematic CI/CD failure diagnosis

Commands (2 admin tools)

• /git-master:config — View or edit configuration
• /git-master:init — Initialize config for current project

Hooks (4 lifecycle events)

Hook	Purpose
SessionStart	Load config, detect provider, inject context
PreToolUse (Bash)	Validate commit messages, block protected branch push, block force push, validate PR titles
PostToolUse (Bash)	Guidance after conflicts, push rejections, successful commits
Stop	Warn about staged uncommitted files, unresolved conflicts, active rebase/merge

Provider abstraction

Provider	CLI	API fallback
GitHub	gh	REST API
GitLab	glab	API v4
Gitea	tea	API v1
Bitbucket	—	REST API
Generic	git	— (local only)

Configuration

Hierarchical .git-master.yml with ~80 configurable options covering commit conventions, branch rules, PR templates, review settings, pipeline config, and workflow preferences.