Cherry-pick fix from hotfix/data-platform-hooks to development.
Hooks must be in separate hooks/hooks.json file (auto-discovered),
NOT inline in plugin.json.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Remove invalid "agents": ["./agents/"] - agent .md files don't need registration
- Inline hooks instead of external reference "hooks/hooks.json"
- Delete orphaned hooks.json file (content now in plugin.json)
This fixes "invalid input" validation errors for hooks and agents fields.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>