The hooks.json files had incorrect structure. Claude Code requires:
- Top-level "hooks" object
- Event names as keys containing arrays
- Each array element must have "matcher" and nested "hooks" array
Fixed 8 plugins:
- clarity-assist
- claude-config-maintainer
- cmdb-assistant
- contract-validator
- data-platform
- pr-review
- projman
- viz-platform
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Implements PostToolUse hook to warn about breaking interface changes:
- Detects changes to plugin.json, hooks.json, .mcp.json, agents/*.md
- Compares with git HEAD to find removed/changed elements
- Warns on: removed hooks, changed matchers, removed MCP servers
- Warns on: plugin name changes, major version bumps
- Non-blocking, configurable via CONTRACT_VALIDATOR_BREAKING_WARN
Depends on #229 (SessionStart auto-validate infrastructure).
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
