document-changes

A skill that creates a Markdown report of codebase changes made during the current session. It records added, modified, and deleted files, commits, and a plain-language summary.

In plain words
What is it for?
Use it to document a session’s code changes, generate a change report, or summarize work for a team.
Why use it?
It turns scattered Git changes into a handoff or review document and stops early when there is no repository or nothing to report.

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/sequenzia/agent-alchemy/document-changes
Any agent
npx skills add sequenzia/agent-alchemy --skill document-changes
Clone the repo
git clone --depth 1 https://github.com/sequenzia/agent-alchemy

Made for: Claude Code, Codex.

Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,029 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00074 $0.02029
Opus 5 $0.00037 $0.01014
Sonnet 5 $0.00015 $0.00406
Haiku 4.5 $0.00007 $0.00203

Measured 2d ago against content hash b81963cac841, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

document-changes 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.

claude/dev-tools/skills/document-changes/SKILL.md · 278 lines

How it starts

The opening of the file, as written. The whole thing — 278 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Document Changes

Generate a structured markdown report documenting codebase changes from the current working session. The report captures files changed, commit history, and a human-readable summary suitable for team reviews, handoff documentation, or personal records.

Arguments

  • $ARGUMENTS — Optional scope or description for the report (e.g., "auth refactor", "add OAuth2 support"). Used to name the output file and populate the report's scope field. If not provided, scope is inferred from commit messages or changed file paths.

Workflow

Execute these 4 steps in order. Stop early if Step 1 or Step 2 determines there is nothing to report.


Step 1: Validate Git Repository

Verify the current directory is inside a git repository:

git rev-parse --is-inside-work-tree
  • If the command fails or returns false, stop and report: "Not inside a git repository. This skill requires git to gather change data."
  • If successful, continue to Step 2.

Step 2: Gather Changes and Metadata

Collect all change data by running these git commands. If any individual command fails, continue with the data that is available.

2.1 Repository Metadata
git branch --show-current
git config user.name
git remote get-url origin 2>/dev/null
date "+%Y-%m-%d %H:%M %Z"
2.2 Uncommitted Changes
git status --porcelain
git diff --stat
git diff --name-status
2.3 Staged Changes
git diff --cached --stat
git diff --cached --name-status
2.4 Recent Commits (up to 20)
git log --oneline -20
git log --format="%H|%s|%an|%ai" -20
2.5 Session Commit Diffs

If there are recent commits (N > 0 from Step 2.4):

git diff --stat HEAD~N..HEAD
git diff --name-status HEAD~N..HEAD

Replace N with the number of recent commits found (capped at 20). If the repo has fewer than N commits, use git diff --stat $(git rev-list --max-parents=0 HEAD)..HEAD instead.

Read the full file on GitHub · 278 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 · 278 lines · 74 tokens per session scan A b81963cac841

Subscribe to this mod's changes

document-changes is a skill published in the GitHub repository sequenzia/agent-alchemy (43 stars, last pushed 3mo ago), licensed MIT. It adds 74 tokens to every session and 2,029 once invoked, about $0.0004 per session on Opus 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 2026-08-30.

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