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:

• Impact level (high/medium/low)

• Affected plugins

• 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:

• Run weekly on schedule

• Fetch changelog and compare versions

• If new versions found:

• Generate analysis report

• Create GitHub issue with findings

• Update version tracking file

• 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