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---
name: breaking-changes
description: Detect breaking changes in Claude Code updates by comparing current API surface against changelog. Maps impacts to specific plugin files.
argument-hint: "[version]"
user-invocable: true
---
# Breaking Changes Detection Skill
## Overview
Compares Claude Code API changes against our plugin ecosystem to detect compatibility issues.
## API Surface File
The `api-surface.md` reference contains our current known API:
- Hook types and their matchers
- Agent frontmatter fields
- Plugin manifest schema
- Skill SKILL.md format
- Script CLI flags used
## Detection Workflow
1. **Load** current api-surface.md
2. **Fetch** latest Claude Code API docs
3. **Diff** for added/changed/removed APIs
4. **Grep** our plugins for each changed API
5. **Report** with file:line impact mapping
## Impact Assessment
| Change Type | Severity | Example |
|-------------|----------|---------|
| Removed API | BREAKING | Hook type deleted |
| Changed schema | BREAKING | Frontmatter field renamed |
| New required field | BREAKING | Mandatory new param |
| Deprecated API | DEPRECATED | Old hook still works |
| New optional API | NEW | New hook type added |
## References
- [API Surface](references/api-surface.md)
- [Migration Guide Template](references/templates/migration-guide.md)
