Claude Code Changelog Review

Expertise for analyzing Claude Code changelog and identifying impacts on plugin development.

Core Purpose

Review Claude Code releases to:

• Identify breaking changes requiring plugin updates
• Discover new features plugins can leverage
• Track deprecations before they become problems
• Ensure plugins follow current best practices

Change Categories

High Impact (Action Required)

Medium Impact (Review Recommended)

Low Impact (Information Only)

Plugin Impact Matrix

Map changelog categories to plugins:

Version Tracking

Version state stored in .claude-code-version-check.json:

{
  "lastCheckedVersion": "2.1.7",
  "lastCheckedDate": "2026-01-14",
  "changelogUrl": "https://raw.githubusercontent.com/anthropics/claude-code/main/CHANGELOG.md",
  "reviewedChanges": [
    {
      "version": "2.1.7",
      "date": "2026-01-14",
      "relevantChanges": [],
      "actionsRequired": []
    }
  ]
}

Analysis Process

Step 1: Fetch Current State

# Read last checked version
cat .claude-code-version-check.json | jq -r '.lastCheckedVersion'

Step 2: Fetch Changelog

Use WebFetch to get the current changelog from: https://raw.githubusercontent.com/anthropics/claude-code/main/CHANGELOG.md

Step 3: Identify New Versions

Compare fetched changelog versions against lastCheckedVersion. Extract all changes since that version.

Step 4: Categorize Changes

For each change, determine:

1. Impact level (high/medium/low)
2. Affected plugins
3. Required action

Step 5: Generate Report

Produce a report with:

• New versions found
• High-impact changes requiring immediate action
• Medium-impact changes worth reviewing
• Suggestions for plugin improvements

Step 6: Update Version Tracking

Update .claude-code-version-check.json with:

• New lastCheckedVersion
• New lastCheckedDate
• Summary of reviewed changes

Change Detection Patterns

Breaking Changes

Look for:

• "BREAKING" or "Breaking Change" headers
• "Removed" sections
• "Migrat" keywords
• "deprecated" becoming "removed"

Hook System Changes

Look for:

• "hook" mentions in features
• New hook events (SessionStart, SessionEnd, SubagentStart, etc.)
• Schema changes for hook input/output
• Permission decision updates

Skill/Command Changes

Look for:

• "skill" or "slash command" mentions
• Frontmatter field changes
• Discovery mechanism updates
• New fields like "context: fork"

Agent/Subagent Changes

Look for:

• "agent" or "subagent" mentions
• Task tool changes
• Agent configuration options
• New agent types

Permission Changes

Look for:

• "permission" mentions
• Wildcard pattern updates
• Security fixes
• Bash permission changes

Report Format

# Claude Code Changelog Review

**Review Date**: YYYY-MM-DD
**Versions Reviewed**: X.X.X to Y.Y.Y
**Previous Check**: YYYY-MM-DD (vX.X.X)

## Summary

- **New versions**: N
- **High-impact changes**: N
- **Medium-impact changes**: N
- **Action items**: N

## High-Impact Changes

### [Version] - Change Title

**Impact**: Breaking/Security/Deprecation
**Affected plugins**: plugin1, plugin2
**Required action**: Description of what needs to be done

## Medium-Impact Changes

### [Version] - Change Title

**Impact**: New feature/Enhancement
**Opportunity**: How plugins could benefit
**Suggested plugins**: plugin1, plugin2

## Action Items

- [ ] Item 1 (high priority)
- [ ] Item 2 (medium priority)

## Next Steps

1. Create issues for high-priority items
2. Schedule review of medium-impact changes
3. Update version tracking file

Automation Integration

For GitHub Actions workflow:

1. Run weekly on schedule
2. Fetch changelog and compare versions
3. If new versions found:
   • Generate analysis report
   • Create GitHub issue with findings
   • Update version tracking file
4. Label issues appropriately

Quick Reference

Relevant Claude Code URLs

Version Number Format

Claude Code uses semantic versioning: MAJOR.MINOR.PATCH

• MAJOR: Breaking changes
• MINOR: New features
• PATCH: Bug fixes

Issue Labels