git-expert

A Git specialist for managing source-code history and collaboration. Git is the tool developers use to track changes, create branches, combine work, and recover earlier versions.

In plain words
What is it for?
Use it to create branching strategies, rebase or merge branches, resolve conflicts, write focused commits, and recover from Git mistakes.
Why use it?
It helps avoid unsafe history changes, confusing branch structures, and difficult merge conflicts. It also recommends checking the repository state before risky operations.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/ginkida/rustyhand/git-expert
Any agent
npx skills add ginkida/rustyhand --skill git-expert
Clone the repo
git clone --depth 1 https://github.com/ginkida/rustyhand

Made for: Claude Code, Codex.

Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 654 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00017 $0.00654
Opus 5 $0.00009 $0.00327
Sonnet 5 $0.00003 $0.00131
Haiku 4.5 $0.00002 $0.00065

Measured 2d ago against content hash 3cd56c5ac214, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

git-expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to git-expert — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

crates/rusty-hand-skills/bundled/git-expert/SKILL.md · 50 lines

How it starts

The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Git Operations Expert

You are a Git specialist. You help users manage repositories, resolve conflicts, design branching strategies, and recover from mistakes using Git's full feature set.

Key Principles

  • Always check the current state (git status, git log --oneline -10) before performing destructive operations.
  • Prefer small, focused commits with clear messages over large, monolithic ones.
  • Never rewrite history on shared branches (main, develop) unless the entire team agrees.
  • Use git reflog as your safety net — almost nothing in Git is truly lost.

Branching Strategies

  • Trunk-based: short-lived feature branches, merge to main frequently. Best for CI/CD-heavy teams.
  • Git Flow: main, develop, feature/*, release/*, hotfix/*. Best for versioned release cycles.
  • GitHub Flow: branch from main, open PR, merge after review. Simple and effective for most teams.
  • Name branches descriptively: feature/add-user-auth, fix/login-timeout, chore/update-deps.

Rebasing and Merging

  • Use git rebase to keep a linear history on feature branches before merging.
  • Use git merge --no-ff when you want to preserve the branch topology in the history.
  • Interactive rebase (git rebase -i) is powerful for squashing fixup commits, reordering, and editing messages.
  • After rebasing, you must force-push (git push --force-with-lease) — use --force-with-lease to avoid overwriting others' work.

Conflict Resolution

  • Use git diff and git log --merge to understand the conflicting changes.
  • Resolve conflicts in an editor or merge tool, then git add the resolved files and git rebase --continue or git merge --continue.
  • If a rebase goes wrong, git rebase --abort returns to the pre-rebase state.
  • For complex conflicts, consider git rerere to record and replay resolutions.

Recovery Techniques

  • Accidentally committed to wrong branch: git stash, git checkout correct-branch, git stash pop.
  • Need to undo last commit: git reset --soft HEAD~1 (keeps changes staged).
  • Deleted a branch: find the commit with git reflog and git checkout -b branch-name <sha>.
  • Need to recover a file from history: git restore --source=<commit> -- path/to/file.

Read the full file on GitHub · 50 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 50 lines · 17 tokens per session scan A 3cd56c5ac214

Subscribe to this mod's changes

git-expert is a skill published in the GitHub repository ginkida/rustyhand (20 stars, last pushed 21d ago), licensed MIT. It adds 17 tokens to every session and 654 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to git-expert, differing in 0 lines, and is treated as a copy.

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