README:
- Removed the "Skills" section since skills/ no longer exists
- Updated the project structure tree to reflect the current layout
- Clarified that agents are discovered natively by Claude Code
CONTRIBUTING:
- Replaced all references to "inter-agent messaging" with the new
coordination protocol (agent-orchestration.md)
- Updated the agent writing guidelines to use "Suggested next agent"
output format instead of the old shared file approach
