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)

Category	Example Changes	Action
Breaking changes	API changes, renamed tools	Update affected plugins immediately
Security fixes	Permission vulnerabilities	Review and update permission rules
Deprecations	Removed features/fields	Remove deprecated usage
Hook changes	New events, schema changes	Update hooks-plugin

Medium Impact (Review Recommended)

Category	Example Changes	Action
New features	New tools, frontmatter fields	Consider plugin enhancements
Permission updates	New wildcard patterns	Update permission documentation
SDK changes	New callbacks, streaming	Update SDK-related skills
MCP improvements	OAuth, server configs	Update agent-patterns-plugin

Low Impact (Information Only)

Category	Example Changes	Action
Bug fixes	UI improvements	Note in changelog
Performance	Startup optimizations	No action needed
IDE features	VS Code updates	No action needed

Plugin Impact Matrix

Map changelog categories to plugins:

Claude Code Area	Affected Plugins
Hooks	hooks-plugin, configure-plugin
Skills/Commands	All plugins with skills/commands
Agents	agents-plugin, agent-patterns-plugin
MCP servers	agent-patterns-plugin
Permissions	configure-plugin, hooks-plugin
Git operations	git-plugin
Testing tools	testing-plugin
SDK changes	agent-patterns-plugin

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

Resource	URL
Changelog	https://raw.githubusercontent.com/anthropics/claude-code/main/CHANGELOG.md
Documentation	https://docs.anthropic.com/en/docs/claude-code
GitHub	https://github.com/anthropics/claude-code

Version Number Format

Claude Code uses semantic versioning: MAJOR.MINOR.PATCH

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

Issue Labels

Label	Use For
changelog-review	All changelog-related issues
breaking-change	Breaking changes requiring updates
enhancement	New feature opportunities
maintenance	General housekeeping