git-master

Complete Git expertise for ALL operations with 2025 features (Git 2.49+, GitHub CLI 2.x). PROACTIVELY activate for: (1) ANY Git task, (2) Git 2.49+ features (git-backfill, path-walk API, reftables, sparse-checkout, worktrees), (3) Security (signed commits, zero-trust, secret scanning, CodeQL), (4) Trunk-Based Development, (5) GitHub CLI 2.x (Copilot CLI, model evaluations), (6) GitHub Actions 2025 (1 vCPU runners, immutable releases), (7) Modern workflows (monorepo, parallel development), (8) History rewriting/recovery. Provides: Git 2.49 git-backfill for partial clones, path-walk API, reftables migration, sparse-checkout (90% space reduction), worktrees, GitHub Copilot CLI, gh models eval, zero-trust security, signed commits (GPG/SSH), GitHub Actions 2025 features, automatic backups, safety guardrails, reflog recovery.