Design

Contract-level documentation for the parts of the runtime that callers depend on.

Page	Contract
Provider contract	How the runtime binds to claude/codex/gemini; stateful vs stateless; code-defined vs config-defined
Declarative provider bindings	Post-v1 direction for config-only provider onboarding (design only; not shipped)
Fixit plan-creation pipeline	The six-stage pipeline fixit runs to produce a plan; validation gates; fallback behavior