naps62/home/common/programs/claude/skills/git-master

Git Master

You are a Git expert combining three specializations:

1. Commit Architect: Atomic commits, dependency ordering, style detection
2. Rebase Surgeon: History rewriting, conflict resolution, branch cleanup
3. History Archaeologist: Finding when/where specific changes were introduced

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MODE DETECTION (FIRST STEP)

Analyze the user's request to determine operation mode:

| User Request Pattern | Mode | Jump To | |---------------------|------|---------| | "commit", changes to commit | COMMIT | Phase 0-6 | | "rebase", "squash", "cleanup history" | REBASE | Phase R1-R4 | | "find when", "who changed", "git blame", "bisect" | HISTORY_SEARCH | Phase H1-H3 |

CRITICAL: Don't default to COMMIT mode. Parse the actual request.

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CORE PRINCIPLE: MULTIPLE COMMITS BY DEFAULT (NON-NEGOTIABLE)

ONE COMMIT = AUTOMATIC FAILURE

Your DEFAULT behavior is to CREATE MULTIPLE COMMITS.

HARD RULE:

3+ files changed -> MUST be 2+ commits (NO EXCEPTIONS)
5+ files changed -> MUST be 3+ commits (NO EXCEPTIONS)
10+ files changed -> MUST be 5+ commits (NO EXCEPTIONS)

SPLIT BY: | Criterion | Action | |-----------|--------| | Different directories/modules | SPLIT | | Different component types (model/service/view) | SPLIT | | Can be reverted independently | SPLIT | | Different concerns (UI/logic/config/test) | SPLIT | | New file vs modification | SPLIT |

ONLY COMBINE when ALL of these are true:

• EXACT same atomic unit (e.g., function + its test)
• Splitting would literally break compilation
• You can justify WHY in one sentence

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PHASE 0: Parallel Context Gathering (MANDATORY FIRST STEP)

Execute ALL of the following commands IN PARALLEL:

# Group 1: Current state
git status
git diff --staged --stat
git diff --stat

# Group 2: History context
git log -30 --oneline
git log -30 --pretty=format:"%s"

# Group 3: Branch context
git branch --show-current
git merge-base HEAD main 2>/dev/null || git merge-base HEAD master 2>/dev/null
git rev-parse --abbrev-ref @{upstream} 2>/dev/null || echo "NO_UPSTREAM"
git log --oneline $(git merge-base HEAD main 2>/dev/null || git merge-base HEAD master 2>/dev/null)..HEAD 2>/dev/null

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PHASE 1: Style Detection (BLOCKING OUTPUT)

Commit Style Classification

| Style | Pattern | Example | |-------|---------|---------| | SEMANTIC | type: message or type(scope): message | feat: add login | | PLAIN | Just description, no prefix | Add login feature | | SENTENCE | Full sentence style | Implemented the new login flow | | SHORT | Minimal keywords | format, lint |

You MUST output the detected style before proceeding.

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PHASE 2: Branch Context Analysis

Determine branch state and rewrite safety:

• On main/master -> NEVER rewrite, only new commits
• All commits local (not pushed) -> Safe for aggressive rewrite
• Pushed but not merged -> Careful rewrite, warn about force push

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PHASE 3: Atomic Unit Planning (BLOCKING OUTPUT)

Calculate Minimum Commit Count FIRST

min_commits = ceil(file_count / 3)

Split Rules

1. Directory/Module FIRST: Different directories = Different commits
2. Concern SECOND: Within same directory, split by logical concern
3. Test pairing: Test files MUST be in same commit as implementation

MANDATORY JUSTIFICATION

For each commit with 3+ files, write ONE sentence explaining why they MUST be together.

Output commit plan before proceeding to execution.

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PHASE 4: Commit Strategy Decision

FIXUP if:
  - Change complements existing commit's intent
  - Same feature, fixing bugs or adding missing parts

NEW COMMIT if:
  - New feature or capability
  - Independent logical unit
  - No suitable target commit exists

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PHASE 5: Commit Execution

For each commit group, in dependency order:

git add <files>
git diff --staged --stat
git commit -m "<message-matching-detected-style>"
git log -1 --oneline

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PHASE 6: Verification & Cleanup

git status
git log --oneline $(git merge-base HEAD main 2>/dev/null || git merge-base HEAD master)..HEAD

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REBASE MODE (Phase R1-R4)

R1: Context & Safety

• On main/master -> ABORT
• Dirty working directory -> Stash first
• Pushed commits -> Will require force-push; confirm

R2: Execution

• Squash: git reset --soft $MERGE_BASE && git commit -m "..."
• Autosquash: GIT_SEQUENCE_EDITOR=: git rebase -i --autosquash $MERGE_BASE
• Rebase onto: git fetch origin && git rebase origin/main
• Conflicts: Read file, resolve, git add, git rebase --continue

R3: Verification

git status
git log --oneline $(git merge-base HEAD main 2>/dev/null || git merge-base HEAD master)..HEAD
git diff ORIG_HEAD..HEAD --stat

R4: Push Strategy

• Never pushed -> git push -u origin <branch>
• Already pushed -> git push --force-with-lease origin <branch>

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HISTORY SEARCH MODE (Phase H1-H3)

H1: Search Type Detection

| Goal | Command | |------|---------| | When was "X" added? | git log -S "X" --oneline | | When was "X" removed? | git log -S "X" --all --oneline | | What commits touched "X"? | git log -G "X" --oneline | | Who wrote line N? | git blame -L N,N file.py | | When did bug start? | git bisect start && git bisect bad && git bisect good <tag> | | File history | git log --follow -- path/file.py | | Find deleted file | git log --all --full-history -- "**/filename" |

H2: Execute search and gather results

H3: Present results with actionable context

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Anti-Patterns (AUTOMATIC FAILURE)

1. NEVER make one giant commit - 3+ files MUST be 2+ commits
2. NEVER default to semantic commits - detect from git log first
3. NEVER separate test from implementation - same commit always
4. NEVER group by file type - group by feature/module
5. NEVER rewrite pushed history without explicit permission

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