# Verification Report: 2026-04-26-track-6-slice-1-bridge-contract-auth

## Status

PASS

## Executive Summary

Re-ran verification for **Track 6 Slice 1 — Bridge Contract, Auth, and Admission** after the previously observed workspace formatting regression was fixed.

The implementation matches the spec, design, and completed tasks for the targeted runtime surfaces:

- a dedicated `bridge-remote-sessions` source-of-truth domain exists for delivered Track 6 behavior;
- the bridge runtime exposes a versioned admission contract and transport negotiation surface;
- JWT-backed admission validation and subject/session-scope binding are implemented fail-closed;
- local Track 4 launch paths continue to reject `remote_bridge` with a stable deferred reason code.

All scoped verification commands for the owning Rust workspace now pass, including the previously failing formatting check.

## Artifacts Read

- `openspec/changes/2026-04-26-track-6-slice-1-bridge-contract-auth/proposal.md`
- `openspec/changes/2026-04-26-track-6-slice-1-bridge-contract-auth/design.md`
- `openspec/changes/2026-04-26-track-6-slice-1-bridge-contract-auth/tasks.md`
- `openspec/changes/2026-04-26-track-6-slice-1-bridge-contract-auth/specs/bridge-remote-sessions/spec.md`
- `openspec/changes/2026-04-26-track-6-slice-1-bridge-contract-auth/apply-report.md`
- `openspec/changes/2026-04-26-track-6-slice-1-bridge-contract-auth/state.yaml`
- `openspec/config.yaml`

## Completeness Check

### Tasks

All tasks are checked complete.

- Total tasks: 4
- Completed: 4
- Incomplete: 0

## Spec Compliance

### Requirement: Dedicated Bridge Remote Sessions Domain

**Status:** PASS

Evidence:
- dedicated delta spec exists at:
  - `openspec/changes/2026-04-26-track-6-slice-1-bridge-contract-auth/specs/bridge-remote-sessions/spec.md`
- proposal/design explicitly place delivered Track 6 bridge behavior in this domain, while preserving `multi-agent-orchestration` ownership of the local fail-closed seam.

Scenario coverage:
- remote bridge behavior specified outside Track 4 local orchestration: PASS

### Requirement: Versioned Bridge Session Contract

**Status:** PASS

Structural evidence:
- `clients/agent-runtime/src/bridge/mod.rs`
  - `BridgeProtocolVersion::V1`
  - `BridgeTransportKind::{Sse, Websocket}`
  - `RemoteBridgeRequest { protocol_version, transport, session_scope }`
  - `BridgeEnvelope` carries version/session-scope/transport metadata

Behavioral evidence from re-run bridge tests:
- `bridge_envelope_serializes_metadata_only_seam`
- `remote_bridge_request_and_availability_remain_metadata_only`
- `bridge_admission_accepts_valid_v1_request_with_jwt_and_scope_binding`

Scenario coverage:
- remote bridge request is versioned and transport-explicit: PASS
- envelope remains transport-agnostic metadata contract: PASS
- supported negotiation scope is bounded to SSE/WebSocket only: PASS

### Requirement: JWT-Backed Bridge Admission and Authentication

**Status:** PASS

Structural evidence:
- `evaluate_bridge_admission(...)` in `clients/agent-runtime/src/bridge/mod.rs`
- `parse_jwt_subject(...)`
- `BridgeAdmissionPolicy`
- `AdmittedBridgeSession { authenticated_subject, bound_session_scope, ... }`

Behavioral evidence from re-run bridge tests:
- `bridge_admission_accepts_valid_v1_request_with_jwt_and_scope_binding`
- `bridge_admission_rejects_missing_jwt`
- `bridge_admission_rejects_malformed_jwt`
- `bridge_admission_rejects_unauthorized_scope_binding`
- `bridge_admission_rejects_empty_session_scope`

Scenario coverage:
- authenticated admission succeeds only with valid JWT and authorized scope: PASS
- malformed, missing, or unauthorized admission attempts fail closed: PASS

### Requirement: Session-Scope Binding and Envelope Enforcement

**Status:** PASS

Structural evidence:
- `AdmittedBridgeSession::validate_envelope_scope(...)`

Behavioral evidence:
- `admitted_bridge_session_rejects_envelope_with_mismatched_scope`
- `admitted_bridge_session_serializes_bound_scope_and_subject`

Scenario coverage:
- admitted bridge session remains bound to authorized session scope: PASS
- mismatched envelope scope is rejected: PASS

### Requirement: Local Track 4 Paths Continue To Fail Closed For `remote_bridge`

**Status:** PASS

Structural evidence:
- `clients/agent-runtime/src/tools/delegate_launch.rs`
  - stable local validation path emitting `remote_bridge_deferred`

Behavioral evidence:
- `launch_rejects_remote_bridge_with_stable_reason_code`
- `rejects_remote_bridge_requests_without_local_fallback`

Scenario coverage:
- local orchestration seam remains fail-closed for delivered remote bridge behavior: PASS
- stable deferred reason code preserved for callers: PASS

## Design Conformance

**Status:** PASS

The implementation follows the major design decisions:

1. **Keep `multi-agent-orchestration` responsible only for the local seam** — followed
2. **Make `bridge/mod.rs` the shared remote bridge contract/types layer** — followed
3. **Introduce narrow admission/authentication boundary only** — followed
4. **Validate protocol version, transport, JWT, and session scope before admission** — followed
5. **Keep slice bounded: no streaming execution, reconnect/resume, reattach, or authority recovery** — followed
6. **Preserve local fail-closed `remote_bridge` rejection in `delegate_launch`** — followed

## Validation Commands Run

### 1. Formatting

Command:

```bash
cargo fmt --all -- --check
```

Result: **PASS**

### 2. Clippy

Command:

```bash
cargo clippy --all-targets -- -D warnings
```

Result: **PASS**

### 3. Bridge-focused tests

Command:

```bash
cargo test --manifest-path clients/agent-runtime/Cargo.toml bridge -- --nocapture
```

Result: **PASS**

Observed suite output included 20 passing bridge-related tests with 0 failures. Key slice-relevant tests included:
- `bridge_admission_accepts_valid_v1_request_with_jwt_and_scope_binding`
- `bridge_admission_rejects_missing_jwt`
- `bridge_admission_rejects_malformed_jwt`
- `bridge_admission_rejects_unauthorized_scope_binding`
- `bridge_admission_rejects_empty_session_scope`
- `admitted_bridge_session_rejects_envelope_with_mismatched_scope`
- `remote_bridge_request_and_availability_remain_metadata_only`
- `bridge_envelope_serializes_metadata_only_seam`
- `launch_rejects_remote_bridge_with_stable_reason_code`
- `rejects_remote_bridge_requests_without_local_fallback`

### 4. Local fail-closed remote bridge rejection

Command:

```bash
cargo test --manifest-path clients/agent-runtime/Cargo.toml launch_rejects_remote_bridge_with_stable_reason_code -- --nocapture
```

Result: **PASS**

Observed targeted test passed in both lib and main test binaries.

## Coverage Assessment

**Status:** ADEQUATE FOR SLICE

The scoped verification covers the behavior introduced by this slice:
- dedicated bridge source-of-truth domain and bounded non-goals;
- versioned bridge request/envelope contract;
- JWT-backed admission and subject/scope binding;
- fail-closed rejection for missing/malformed/unauthorized admission attempts;
- continued local fail-closed `remote_bridge` rejection in Track 4 launch paths.

Verification was scoped to the owning workspace per `openspec/config.yaml`.

## Regressions / Critical Issues

No regressions or critical issues were found in the scoped owning workspace during this re-run.

The previously observed formatting regression is no longer present.

## Verdict

**PASS**

Reason:
- slice implementation matches the spec;
- design decisions were followed;
- tasks are complete;
- targeted tests pass with adequate coverage for the slice;
- scoped workspace verification commands now pass cleanly.

## Next Recommended

- This change is ready to be treated as verified.
- If desired by the orchestrator, proceed to the archive/close-out path once any broader process requirements are satisfied.
