Extended plan-agent from a plan writer to a plan verifier — added a mandatory §8 Open step that spins up a local HTTP server, screenshots the rendered HTML plan in a browser, then bumped to v0.9.0.
- Created docs/plans/create-plans-index-page.html — HTML plan for a plans index/gallery page
- Added mandatory §8 Open to plan-agent SKILL.md: browser verify via local python3 HTTP server
- Added 5 chrome MCP browser tools to allowed-tools so the step never prompts for permission
- Updated CHANGELOG.md with v0.9.0 entry documenting the new mandatory open step
- Bumped plan-agent from 0.8.0 → 0.9.0 in marketplace.json