changelog

Generate a Keep a Changelog entry from git commits.

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/corv89/shannot/changelog
Any agent
npx skills add corv89/shannot --skill changelog
Clone the repo
git clone --depth 1 https://github.com/corv89/shannot

Made for: Claude Code, Codex.

Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 601 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 $0.00013 $0.00601
Opus 5 $0.00006 $0.00300
Sonnet 5 $0.00003 $0.00120
Haiku 4.5 $0.00001 $0.00060

Measured yesterday against content hash 32ae458f7738, 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 yesterday.

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/skills/changelog/SKILL.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/changelog - Generate Changelog Entry

Purpose

Generate a Keep a Changelog entry matching the existing CHANGELOG.md style, if available.

Usage

/changelog [version]

Version is optional — suggest one based on the changes (patch for fixes, minor for features, major for breaking changes).

Process

  1. Find the last tag and get commits

    git describe --tags --abbrev=0
    git log --pretty=format:'%s' <tag>..HEAD
    
  2. Categorize using Keep a Changelog sections

    • ### Features — new capabilities
    • ### Changed — breaking or notable behavior changes
    • ### Enhancements — improvements to existing features
    • ### Bug Fixes — things that were broken
    • ### Removed — removed features (rare)
  3. Write entries in a consistent voice

    Match the existing style:

    • Start with imperative verb or noun phrase
    • Bold key concepts on first mention: **Overlay commit model for file writes**:
    • Sub-bullets for details when a feature has multiple parts
    • Technical but accessible — users are developers

    Examples:

    • Fix login regression: use OAuth2 instead of deprecated token flow
    • Improve CLI help with quick start guide and clearer description
    • **Remote file sync**: sync_remote() now supports conflict detection
  4. Skip internal-only changes

    Omit: CI tweaks, refactoring without user impact, dependency bumps (unless security-related)

  5. Output format

    ## [x.y.z] - YYYY-MM-DD
    
    ### Features
    
    - **Feature name**: Description of what users can now do
    
    ### Bug Fixes
    
    - Fix specific thing that was broken
    
  6. Prepend to CHANGELOG.md

    If CHANGELOG.md doesn't exist, create it with this header:

    # Changelog
    
    All notable changes to this project will be documented in this file.
    
    The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
    and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
    

Read the full file on GitHub · 91 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. yesterday First seen · 91 lines · 13 tokens per session scan A 32ae458f7738

Subscribe to this mod's changes

changelog is a skill published in the GitHub repository corv89/shannot (25 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 13 tokens to every session and 601 once invoked, about $0.0001 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 2026-09-01.

Related

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changelog-draft

Generate a reviewable changelog draft from PRs merged in a release range. Extracts explicit CHANGELOG markers, classifies unmarked PRs, adds external contributor attribution, and outputs markdown + JSON artifacts. Does NOT mutate channelversions.json.

warpdotdev/warp · 54 tokens

classify-changelog-pr

Reference guidance for classifying whether an unmarked PR should appear in the changelog and under which category. Used inline by the changelog-draft skill — not dispatched as a separate agent.

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