Crate ff_core 

Core types, state enums, partition math, key builders, and error codes for FlowFabric.

Re-exports

pub use engine_error::EngineError;

pub use engine_error::BackendError;

pub use engine_error::BackendErrorKind;

pub use backend::ScannerFilter;

Modules

backend

Backend-trait supporting types (RFC-012 Stage 0).

capability

RFC-018 Stage A — backend capability discovery surface.

caps

Backend-shared capability matching predicate (RFC-v0.7 Q7).

completion_backend

The CompletionBackend trait — backend-agnostic completion subscription surface (issue #90).

contracts

Phase 1 function contracts — Args + Result types for each FCALL.

engine_backend

The EngineBackend trait — abstracting FlowFabric’s write surface.

engine_error

Typed engine-error surface (issue #58.6).

error

Error classification for FlowFabric.

handle_codec

Backend-agnostic codec for HandleOpaque payloads.

hash

Small, stable hash helpers shared across ff-sdk + ff-scheduler + ff-engine. Not security-sensitive — these are for cardinality reduction (log digests) and deterministic-but-spread iteration (partition-scan start offsets). A single source of truth avoids drift if the algorithm changes.

keys

partition

Partition families, keys, and routing helpers.

policy

state

stream_events

RFC-019 Stage C — Typed stream events.

stream_subscribe

RFC-019 Stage A/B/C — cross-backend stream-cursor subscription surface (shared primitives).

types

waitpoint_hmac

Consumer-facing import path for the waitpoint HMAC wire types and rotation args.