# Verify Report — rook-589-gateway-api

## Status

PASS WITH WARNINGS

## Executive Summary

The implementation satisfies the verified functional requirements for credential storage,
OpenAI-compatible gateway types, vendor mapping, upstream proxying, handlers/router behavior, and
server wiring. All 28 tasks in `tasks.md` are complete, and the focused gateway/server/credential
tests executed successfully.

Non-blocking warnings remain:

1. Health feedback is still awaited inline in the handler path rather than clearly happening after
   the response or concurrently.
2. Logging/tracing does not yet fully meet the richer NFR expectations (for example duration and
   explicit error-level transport/timeout logging).
3. `cargo clippy --all-targets -D warnings` still fails in the Rook crate due to pre-existing
   issues in `src/db/settings.rs`, outside this change’s touched scope.

## Artifacts Reviewed

- `openspec/changes/rook-589-gateway-api/proposal.md`
- `openspec/changes/rook-589-gateway-api/spec.md`
- `openspec/changes/rook-589-gateway-api/design.md`
- `openspec/changes/rook-589-gateway-api/tasks.md`
- `clients/rook/Cargo.toml`
- `clients/rook/migrations/0003_account_api_key.sql`
- `clients/rook/src/domain/mod.rs`
- `clients/rook/src/db/mod.rs`
- `clients/rook/src/db/account.rs`
- `clients/rook/src/gateway/types.rs`
- `clients/rook/src/gateway/vendor.rs`
- `clients/rook/src/gateway/upstream.rs`
- `clients/rook/src/gateway/handlers.rs`
- `clients/rook/src/gateway/mod.rs`
- `clients/rook/src/server/mod.rs`
- `clients/rook/src/main.rs`

## Requirements Coverage

### R1 — `api_key` field on `ProviderAccount`

**Result**: PASS

Evidence:
- `ProviderAccount.api_key: Option<String>` exists in `clients/rook/src/domain/mod.rs`
- migration `clients/rook/migrations/0003_account_api_key.sql` exists
- migration wired in `clients/rook/src/db/mod.rs`
- DB insert/select/row mapping include `api_key` in `clients/rook/src/db/account.rs`
- targeted tests passed for migration presence, migration recording, round-trip with `Some`, and
  round-trip with `None`

### R2 — OpenAI-compatible request types

**Result**: PASS

Evidence:
- `ChatCompletionRequest` and `ChatCompletionMessage` exist
- typed optional request fields exist: `temperature`, `top_p`, `n`, `stop`, `max_tokens`,
  `presence_penalty`, `frequency_penalty`, `user`, `stream`
- polymorphic `Stop` type exists and supports single string or array of strings
- unknown extra fields are preserved through `#[serde(flatten)]`
- tests passed for minimal request, stream variants, typed optional fields, stop array, and
  unknown-field preservation

### R3 / R4 / R5 — Response, model list, and error types

**Result**: PASS WITH WARNINGS

Evidence:
- `ChatCompletionResponse`, `ChatCompletionChoice`, `Usage`, `ModelObject`, `ModelListResponse`,
  `GatewayErrorResponse`, and `GatewayErrorBody` exist
- serde tests passed for response round-trip, model serialization, empty model list, and error JSON
  shape

Warning:
- `handle_list_models` currently sets `created: 0` rather than a real timestamp. Tests do not
  validate timestamp semantics.

### R6 / R7 — Vendor base URL mapping and auth header mapping

**Result**: PASS

Evidence:
- default base URLs implemented in `clients/rook/src/gateway/vendor.rs`
- `Other(_) -> None` matches spec
- override precedence and trailing slash trimming implemented
- Anthropic uses `x-api-key`, others use bearer auth
- targeted vendor tests all passed

### R8 / R9 / R10 — Upstream proxying, routing, and error behavior

**Result**: PASS WITH WARNINGS

Evidence:
- upstream layer uses `reqwest`
- forwards raw request body bytes
- forwards requests without auth header when `api_key = None`
- maps missing base URL, non-2xx upstream status, transport failure, timeout, and body read errors
- integration-style upstream tests passed for happy path, override URL, missing base URL,
  missing-api-key forwarding, non-success mapping, and transport failure mapping

Warning:
- handler-level health feedback is still awaited inline after upstream completion.

### R11 — stream rejection

**Result**: PASS WITH WARNINGS

Evidence:
- `stream: true` returns `400`
- message and code match expected values
- targeted handler test passed

Warning:
- static code shows stream rejection happens before routing resolution, which is correct, but the
  tests do not explicitly assert that no routing/upstream call occurred.

### Health feedback requirement

**Result**: PASS WITH WARNINGS

Evidence:
- success path calls `mark_success(account_id)`
- failure path calls `mark_failure(account_id, 60)`
- happy-path integration test checks account becomes healthy after success

Warning:
- health feedback now runs in background tasks after response construction, but the tests still
  verify eventual consistency rather than immediate inline completion.

### Server wiring / NFR-4 backward compatibility

**Result**: PASS

Evidence:
- `server::build_app()` creates registry, routing engine, reqwest client, and `GatewayState`
- gateway mounted at `/v1`
- `/api/health` preserved
- server composition tests passed for `/api/health` and `/v1/models`

## Test Evidence

Executed successfully:

- `cargo test --manifest-path "clients/rook/Cargo.toml" gateway::`
- `cargo test --manifest-path "clients/rook/Cargo.toml" server::tests::`
- `cargo test --manifest-path "clients/rook/Cargo.toml" open_in_memory_applies_account_api_key_migration`
- `cargo test --manifest-path "clients/rook/Cargo.toml" insert_and_get_account_round_trips_api_key`
- `cargo test --manifest-path "clients/rook/Cargo.toml" chat_completion_request_deserializes_typed_optional_fields`
- `cargo test --manifest-path "clients/rook/Cargo.toml" proxy_chat_completion_without_api_key_still_forwards_request`

Additional verification signal:

- `cargo clippy --manifest-path "clients/rook/Cargo.toml" --all-targets -- -D warnings`
  - still fails due to pre-existing `clippy::field_reassign_with_default` warnings in
    `src/db/settings.rs`

## Gaps / Warnings

1. Health updates are awaited inline, potentially blocking response completion.
2. Logging/tracing does not yet meet NFR-3 fully:
   - no `ERROR` logs for connection/timeouts in handlers/upstream
   - no duration field
   - no explicit upstream status code logging on completion
3. `cargo clippy -D warnings` does not pass for the crate due to pre-existing issues in
   `src/db/settings.rs`.

## Critical Issues

None.

## Next Recommended

1. Consider making health feedback non-blocking or explicitly concurrent after response
   construction.
2. Improve structured logging/tracing to satisfy the remaining NFR expectations.
3. Clean up pre-existing clippy failures in `src/db/settings.rs` separately from this change.
