- agent/subagents/openagent.md: drop the embedded GMS AGENTS.md (repo URL, Codi/Sam, FOR-CLAUS, Go/domain rules); generic builder whose name+role come from the task prompt
- introduce two named parallel builders (defaults: Leo and Mia) for two components
- escalation now happens in chat, not via an escalation file
- README updated to match (named builders, no escalation file); OpenArchitect.md personal absolute path -> .opencode/context