changelog

A tool for creating a changelog, a list of meaningful changes between two points in a Git project, from its commit history.

In plain words
What is it for?
It helps prepare release notes or compare changes between tags, branches, commits, or the latest version and the current code.
Why use it?
It turns raw commit messages into an organized summary of new features, fixes, performance changes, refactoring, documentation, tests, and breaking changes.

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/5uck1ess/devkit/changelog
Any agent
npx skills add 5uck1ess/devkit --skill changelog
Clone the repo
git clone --depth 1 https://github.com/5uck1ess/devkit

Made for: Claude Code, Codex.

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 542 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 $0.00035 $0.00542
Opus 5 $0.00017 $0.00271
Sonnet 5 $0.00007 $0.00108
Haiku 4.5 $0.00003 $0.00054

Measured 2d ago against content hash 93ba67a70bbc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

changelog 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.

skills/changelog/SKILL.md · 78 lines

What it actually says

Changelog Generation

Generate a structured changelog from git commits between two refs.

Parameters

  1. From — start ref (default: last tag, or first commit if no tags)
  2. To — end ref (default: HEAD)
  3. Format — output format (default: markdown)

Step 1: Gather Commits

# Find the range
FROM=${from:-$(git describe --tags --abbrev=0 2>/dev/null || git rev-list --max-parents=0 HEAD)}
TO=${to:-HEAD}

git log ${FROM}..${TO} --oneline --no-merges

Step 2: Categorize

Analyze each commit and categorize:

  • Features — new functionality (feat:, add:, new files)
  • Fixes — bug fixes (fix:, bug:, patch:)
  • Performance — optimizations (perf:, benchmark improvements)
  • Refactoring — code changes with no behavior change (refactor:, chore:)
  • Documentation — doc changes (docs:, README, comments)
  • Tests — test additions/changes (test:)
  • Breaking Changes — anything that changes public API or behavior

Step 3: Output

## Changelog: {from} → {to}

### Features
- Added JWT authentication middleware (#42)
- New `/api/health` endpoint

### Fixes
- Fixed race condition in cache invalidation (#38)
- Corrected timezone handling in date parser

### Performance
- Optimized database queries — 2x faster list endpoints

### Breaking Changes
- Removed deprecated `/api/v1/users` endpoint — use `/api/v2/users`

### Other
- Updated dependencies
- Added CI pipeline for ARM builds

Presets

/devkit:changelog
/devkit:changelog --from v1.2.0 --to v1.3.0
/devkit:changelog --from main --to feature/auth

Rules

  • Use actual commit messages — don't fabricate changes
  • Group related commits together
  • Include PR/issue numbers if present in commit messages
  • Highlight breaking changes prominently
  • Skip merge commits and trivial changes (typo fixes, formatting)
  • If conventional commits are used, respect the prefixes
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 · 78 lines · 35 tokens per session scan A 93ba67a70bbc

Subscribe to this mod's changes

changelog is a skill published in the GitHub repository 5uck1ess/devkit (5 stars, last pushed 13d ago), licensed MIT. It adds 35 tokens to every session and 542 once invoked, about $0.0002 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 2026-08-31.

Related

Other skills, from other repositories