decide.fyi Decision API
Deterministic Decision API engine powering workflow applications, stable MCP notary remotes, decision memo packets, and execution gates
Positioning: Decide is the API engine and compatibility surface. Krafthaus workflow apps, Policy MCP Notaries, decision memo packets, and execution gates are application surfaces that reuse the same verdict, request ID, and evidence contract.
Production Determinism Boundary
Binding production verdicts should use a versioned declarative rulebook:
Runtime architecture: see docs/RULEBOOK_RUNTIME_ARCHITECTURE.md.
Machine-readable schema: https://api.decide.fyi/schemas/rulebook-v1.schema.json.
Active runtime manifest: https://api.decide.fyi/manifests/rulebook-runtime-v1.json.
Downstream application binding: decide_application_binding_v1.
The production core is hybrid_declarative_rulebook_with_trusted_adapters:
direct declarative rulebooks are supported, registered first-party trusted
adapters may supply bounded facts, and customer executable rulebooks are
rejected. In both supported binding modes, Rulebook v1 remains the only binding
verdict selector.
