commit-context

A tool for tracing a file, function, or line of code back to the commit and agent session that produced it.

In plain words
What is it for?
It is for checking blame or history, finding the relevant commit, and retrieving any linked session details and recorded observations.
Why use it?
It helps explain why code exists when the current file or git history alone does not show the original working context.

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/m-t-d-n/agentmemory-codex-windows/commit-context
Any agent
npx skills add M-T-D-N/agentmemory-codex-windows --skill commit-context
Clone the repo
git clone --depth 1 https://github.com/M-T-D-N/agentmemory-codex-windows

Made for: Claude Code, Codex.

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 569 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 $0.00061 $0.00569
Opus 5 $0.00030 $0.00284
Sonnet 5 $0.00012 $0.00114
Haiku 4.5 $0.00006 $0.00057

Measured 2d ago against content hash 11a6e724628c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

commit-context 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 commit-context — 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.

plugin/skills/commit-context/SKILL.md · 65 lines

What it actually says

The user wants commit context for: $ARGUMENTS

Quick start

git blame -L 40,52 src/auth/refresh.ts   # -> SHA 9a1b2c3d
memory_commit_lookup { "sha": "9a1b2c3d4e5f60718293a4b5c6d7e8f901234567" }

Expected output:

9a1b2c3 on main by dev: "rotate refresh tokens"
Linked session 7f3a9c2 "Auth refresh rework", 14 obs.

Why

Report only what git and the lookup return. When the lookup gives commit: null, the commit predates session linking; do not invent intent.

Workflow

  1. Find the SHA: git blame -L <start>,<end> <file> for a line range; git log -L :<function>:<file> for a function; git log -n 1 -- <file> for a bare path.
  2. Look it up: memory_commit_lookup { "sha": "<full-sha>" }.
  3. Present the commit (sha, short sha, branch, author, message), the linked session(s) (id, project, started/ended, observation count, summary), and the importance >= 7 observations via memory_recall when available.

Anti-patterns

WRONG: lookup returns { "commit": null }, you narrate "the agent was refactoring auth" from the diff alone.

RIGHT: "This commit predates session linking, so there is no recorded agent session. From git show: it changed token rotation in refresh.ts."

Checklist

  • SHA came from git blame/log, not a guess.
  • commit: null reported as "predates linking", no fabricated session.
  • Session details quote the lookup response verbatim.
  • No intent claimed beyond what observations state.

See also

  • commit-history: list many agent-linked commits at once.
  • recall: dig deeper into the linked session's observations.

Troubleshooting

See ../_shared/TROUBLESHOOTING.md if memory_commit_lookup is not available.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 65 lines · 61 tokens per session scan A 11a6e724628c

Subscribe to this mod's changes

commit-context is a skill published in the GitHub repository M-T-D-N/agentmemory-codex-windows (2 stars, last pushed 2d ago), licensed Apache-2.0. It adds 61 tokens to every session and 569 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to commit-context, differing in 0 lines, and is treated as a copy.

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