changelog-scan

name	changelog-scan
description	Scan Claude Code changelog for new versions, features, and changes. Fetches official docs, parses release notes, and generates structured update report. Use when: checking for new Claude Code versions, features, or changes since the last known release.
argument-hint	[--since <version>]
user-invocable	true

Changelog Scan Skill

Overview

Fetches and analyzes the official Claude Code changelog to detect new versions and changes.

Data Sources

Source	URL	Method
Changelog	code.claude.com/docs/en/changelog.md	WebFetch
Docs Index	code.claude.com/docs/llms.txt	WebFetch
Hooks Ref	code.claude.com/docs/en/hooks.md	WebFetch
Plugins Ref	code.claude.com/docs/en/plugins-reference.md	WebFetch
CLI Ref	code.claude.com/docs/en/cli-reference.md	WebFetch

Workflow

1. Fetch changelog via the harness CLI (ported from the old fetch-changelog into @fusengine/harness): bun ${CLAUDE_PLUGIN_ROOT}/../node_modules/@fusengine/harness/dist/cli/bin.mjs changelog It fetches code.claude.com/docs/en/changelog.md, parses versions (current MDX <Update label="X.Y.Z"> format + legacy ## vX.Y.Z fallback), writes state to ~/.claude/logs/00-changelog/<date>-state.json, and prints JSON {latest, new_since_last_check, recent_versions}. WebFetch on the same URL is the manual fallback.
2. Parse version numbers and release dates
3. Extract changes per version (features, fixes, breaking)
4. Compare with last known version from state file
5. Generate report using templates/changelog-report.md

Version Detection

Parse patterns from changelog:

• ## vX.Y.Z or ## X.Y.Z - Version headers
• ### Breaking Changes - Breaking section
• ### New Features - Features section
• ### Bug Fixes - Fixes section

State File

Location: ~/.claude/logs/00-changelog/{date}-state.json

References

• Sources Reference
• Report Template