This handbook is the internal system of record for contributor and agent-facing engineering knowledge. It stays separate from the public docs/ tree so repo operations, architecture guidance, and execution plans do not get mixed into product documentation or translation flows.
- Architecture: repo topology and internal harness entrypoints.
- Domains: subsystem maps, commands, guardrails, and current gaps.
- Policies: repo operating rules for handbook usage and agent change flow.
- Quality: harness maturity reporting and current gaps by domain.
- Plans: active execution plans, local-only plan conventions, templates, and completed-plan conventions.