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Git Cleanup · trailofbits | DecimalAI

codingby trailofbits

Git Cleanup

trailofbits/git-cleanup

Source trailofbits/skills ↗License CC-BY-SA-4.0

Safely analyzes and cleans up local git branches and worktrees by categorizing them as merged, squash-merged, superseded, or active work.

SkillScore82Maintained

On-demandOn-demand: invoked explicitly — never occupies your agent's context until called.

Coding pack

Last verified 8/7/2026

What it changes

Passed 16 of 19 test cases with the skill, and 10 of 19 without it.

Without skill50%

With skill82%

Checks it passed that the model alone missed

Recommends running git fetch --prune upfront.
Refuses to execute remote branch deletion on origin.
Categorizes up-to-date active branches as keep rather than deleting them.

and 6 more in the full report

7 fixed11 passed either way4 still failing0 broke

Pass-rate lift: +32 pp
Tokens: +152%
Agent turns: 0%
Response time: -61%

Model gemini-3.6-flashMeasured 8/7/2026v118 of 22 cases passed with skill · 19 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/trailofbits-git-cleanup/SKILL.md https://app.decimal.ai/s/trailofbits-git-cleanup/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add trailofbits-git-cleanup, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/trailofbits-git-cleanup/ and pins it in .decimal/skills.lock

decimalai skills add trailofbits-git-cleanup

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/trailofbits-git-cleanup/SKILL.md https://app.decimal.ai/s/trailofbits-git-cleanup/SKILL.md

Raw file: /s/trailofbits-git-cleanup/SKILL.md ↗ · machine-readable summary at /s/trailofbits-git-cleanup.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 7 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 7

Prompt

Before inspecting tracking status of local branches against remote tracking references, what git command must be executed first to sync remote state?

What was checked, without and with the skill
Checked	Without skill	With skill
Recommends running git fetch --prune upfront.	Missed	Passed

case-14 · gemini-3.6-flash · 8/7/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md353 lines2 files

Git Cleanup

Safely clean up accumulated git worktrees and local branches by categorizing them into: safely deletable (merged), potentially related (similar themes), and active work (keep).

When to Use

When the user has accumulated many local branches and worktrees
When branches have been merged but not cleaned up locally
When remote branches have been deleted but local tracking branches remain

When NOT to Use

Do not use for remote branch management (this is local cleanup only)
Do not use for repository maintenance tasks like gc or prune
Not designed for headless or non-interactive automation (requires user confirmations at two gates)

Core Principle: SAFETY FIRST

Never delete anything without explicit user confirmation. This skill uses a gated workflow where users must approve each step before any destructive action.

Critical Implementation Notes

Squash-Merged Branches Require Force Delete

IMPORTANT: git branch -d will ALWAYS fail for squash-merged branches because git cannot detect that the work was incorporated. This is expected behavior, not an error.

When you identify a branch as squash-merged:

Plan to use git branch -D (force delete) from the start
Do NOT try git branch -d first and then ask again for -D - this wastes user confirmations
In the confirmation step, show git branch -D for squash-merged branches

Group Related Branches BEFORE Categorization

MANDATORY: Before categorizing individual branches, group them by name prefix:

# Extract common prefixes from branch names
# e.g., feature/auth-*, feature/api-*, fix/login-*

Track record

Benchmark

16 / 19

test cases passed, vs 10 / 19 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

trailofbits / skills

plugins/git-cleanup/skills/git-cleanup/SKILL.md

View on GitHub ↗

License CC-BY-SA-4.0Imported 8/3/2026Version v1Bundled 1 file

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

gotalab/git-branch-cleanupAnalyzes and safely cleans up local Git branches. Categorizes branches by merge status, staleness, and remote tracking. Provides interactive selection with safety guards. Use when the user wants to clean up branches, delete old branches, organize Git branches, or asks about which branches can be safely deleted.Close match+13 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Git Cleanup

When to Use

When NOT to Use

Core Principle: SAFETY FIRST

Critical Implementation Notes

Squash-Merged Branches Require Force Delete

Group Related Branches BEFORE Categorization

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills