1d51e71ebf
A ReasoningState item carries each provider block as raw bytes. The service decides what is foreign: foreign state after the last user text is refused, earlier foreign state is dropped before the backend and counted on the receipt. Backends receive a ProviderCall that holds only what they may see, and the service fills and checks the receipt's provider tag and drop count; a refused result reaches the caller as a typed Provider failure, releases its slot and replays on retry. transcript_items turns a completed result into transcript items from the receipt, so callers never branch on provider. Spec eureka-body:cut_spec:cut-connector-reasoning-item.r1; reports h1-h2; Soul s2 holds (verdict eureka-body:verdict:cut-connector-reasoning-item.s2). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
65 lines
3.6 KiB
Markdown
65 lines
3.6 KiB
Markdown
# 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`,
|
|
`InputItem::ReasoningState` (a provider's opaque reasoning block, replayed by callers
|
|
verbatim via `TransportResult::transcript_items`; the service refuses another provider's
|
|
state in the in-flight tool exchange and drops it from earlier turns),
|
|
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](https://github.com/GameCult/CodexConnector) at fd7cec4, formerly
|
|
PolyForm Noncommercial. Its sole copyright holder relicensed the lifted material as
|
|
AGPL-3.0-only for this repository.
|