git-analysis

git-analysis is a skill for Claude Code from autohandai/code-cli. It costs 57 tokens per session (437 once invoked), scanned A, original, Apache-2.0.

A workflow for answering questions from Git history, the record of changes to a codebase. It uses commits, diffs, blame, and bisecting to explain what changed, why a line exists, and when a problem began.

In plain words
What is it for?
Use it to compare releases, trace a line to its introducing commit, find where a regression started, identify active contributors, review risky changes, and draft changelogs.
Why use it?
It helps distinguish current code from its history and provides evidence for regressions, ownership, release changes, and branch differences.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to compare releases, trace a line to its introducing commit, find where a regression started, identify active contributors, review risky changes, and draft changelogs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/autohandai/code-cli/git-analysis
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.

Any agent
npx skills add autohandai/code-cli --skill git-analysis
Clone the repo
git clone --depth 1 https://github.com/autohandai/code-cli

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for git-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/autohandai/code-cli/git-analysis/github.svg)](https://agentmods.dev/skills/autohandai/code-cli/git-analysis)
Your own site
<a href="https://agentmods.dev/skills/autohandai/code-cli/git-analysis"><img src="https://agentmods.dev/badge/skills/autohandai/code-cli/git-analysis/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for git-analysis

Your own site · 80×15
<a href="https://agentmods.dev/skills/autohandai/code-cli/git-analysis"><img src="https://agentmods.dev/badge/skills/autohandai/code-cli/git-analysis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 437 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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 5.1 $0.00057 $0.00437
Opus 5.5 $0.00023 $0.00175
Sonnet 5.5 $0.00011 $0.00087
Haiku 4.5 $0.00006 $0.00044

Measured 1mo ago against content hash 8a7a6b5e04d6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

git-analysis 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 1mo 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.

src/skills/builtin/git-analysis/SKILL.md · 40 lines

What it actually says

Read the history, not just the tree

Git already knows most of what a reviewer wants to ask. Use it before reading code, and cite commits.

Techniques

  • What changed between X and Y: git_diff_range, then group by module; summarize behavior changes, not file lists.
  • Why does this line exist: git blame -L through run_command, then git show the commit and read its message and the surrounding diff.
  • When did it break: find the last known good and first known bad, then narrow with git bisect run <test command> when a test exists; otherwise bisect by hand on the commits touching the area (git log -- <path>).
  • Who owns this area: git shortlog -sn -- <path> and recent authors.
  • What is risky in this release: largest diffs, files with many recent touches, changes without tests, dependency bumps.
  • Branch relationships: git log --oneline --graph, merge bases, commits not yet in main.

Rules

  • Quote commit hashes and dates; never paraphrase a commit message as fact without showing it.
  • Read-only by default. Do not rebase, reset, or rewrite history unless the user asks for that specific operation and confirms.
  • Large histories: bound queries with paths, --since, and -n.

Output

A short narrative with the commits that matter, then a table of commit, date, author, summary, and the evidence line for each claim. End with the open questions the history cannot answer.

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. 1mo ago First seen · 40 lines · 57 tokens per session scan A 8a7a6b5e04d6

Subscribe to this mod's changes

git-analysis is a skill published in the GitHub repository autohandai/code-cli (205 stars, last pushed today), licensed Apache-2.0. It adds 57 tokens to every session and 437 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-15.