GameCult/ModelConnector
Watch
9
0
Fork
You've already forked ModelConnector
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
ModelConnector/README.md
Meta Vens c23d91391d connector-contract-v3: the v3 wire - named MessagePack documents over a CultNet operation carriage 
Ids become gamecult.model.*.v3. Every document is encoded by one named
MessagePack codec in contract.rs with unknown fields refused, and publishes a
JSON Schema generated from its type (schemas/). The envelope's ciphertext is
binary. Each frame is a cultnet.operation_request.v0 / operation_response.v0
for service gamecult.model.connector, operation invoke, its message_id the
request id, its payload the base64 of the sealed envelope; the carriage is
checked before any decryption. frame_bytes_for_payload and
payload_bytes_for_frame measure the carriage. Golden v3 fixtures and their
generator (tests/wire_golden_v3.rs) pin drift. The test debt of the kit lift
(each identity field, each contract_refusal arm, request ids measured in bytes)
is paid in the rewritten code.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-28 11:21:11 +01:00

3.4 KiB
Raw Blame History

ModelConnector

The connector kit for GameCult minds: one typed, encrypted, replay-safe contract between a caller that needs a model turn and a daemon that holds the provider credential, so no project wires its own provider calls.

Status: the model-connector crate is live. No connector binary exists yet (the Claude connector is first, then an OpenAI-compatible one).

Entry points

Crate crates/model-connector:

  • src/contract.rs - the v3 wire contract (gamecult.model.*.v3): ProviderRequest, TransportInvocation, TransportResult, TransportReceipt, the typed StopReason, FailureKind and Refusal, and the canonical byte and digest functions that bind a result to its request. Every document is named MessagePack with unknown fields refused.
  • src/envelope.rs - the AES-256-GCM TransportEnvelope (binary ciphertext), its identity-binding AAD, the length-prefixed framing, and the CultNet carriage: each frame is a cultnet.operation_request.v0 / operation_response.v0 for service gamecult.model.connector, operation invoke, its message_id the request id and its payload the base64 of the sealed envelope.
  • schemas/ - one JSON Schema per v3 document, generated from the types.
  • src/client.rs - ConnectorClient, the one-request caller side.
  • src/service.rs (feature daemon) - TransportService: caller admission, durable replay (a retried request is answered byte-identically and the provider runs once), in-flight and capacity refusals.
  • src/serve.rs (feature daemon) - serve(), the loopback accept loop, over the ProviderBackend trait. A connector binary implements ProviderBackend for its provider and calls serve; the kit names no provider.

Frame arithmetic is public in src/envelope.rs, measured on the carriage frame: frame_bytes_for_payload(n) is the frame a caller payload bound of n needs, payload_bytes_for_frame(frame) is the largest payload bound a frame allows, and MAX_IDENTITY_BYTES (256) bounds caller ids, request ids and model names. serve refuses a frame/payload pair that violates them (ServeError::FrameBound states the frame needed); the smallest legal frame is frame_bytes_for_payload(MIN_PAYLOAD_BYTES). A request id past the bound is refused on the wire as Refusal::Malformed, the reply echoing the id (the connection is dropped only if that reply cannot fit the frame); ConnectorClient refuses such an id locally with RequestIdTooLong.

The default feature set compiles contract, envelope and client only. The kit speaks v3 only: a v2 frame gets no answer.

Verify

cargo test --locked --workspace
cargo test --locked --workspace --features model-connector/daemon

crates/model-connector/tests/wire_golden_v3.rs pins the v3 documents and one sealed carriage frame to the fixtures in crates/model-connector/tests/fixtures/wire_v3 (regenerate with WIRE_V3_REGENERATE=1; see the fixtures' README), and crates/model-connector/tests/published_schemas.rs fails when schemas/ differs from the types (MODEL_CONNECTOR_REGENERATE_SCHEMAS=1 rewrites it).

Provenance and license

AGPL-3.0-only. See LICENSE.

The contract, envelope, client, replay service and serve loop were lifted from CodexConnector at fd7cec4, formerly PolyForm Noncommercial. Its sole copyright holder relicensed the lifted material as AGPL-3.0-only for this repository.