## Verification Report

**Change**: track-4-slice-3-mailbox-orchestration  
**Version**: N/A

---

### Completeness
| Metric | Value |
|--------|-------|
| Tasks total | 15 |
| Tasks complete | 15 |
| Tasks incomplete | 0 |

All tasks in `openspec/changes/track-4-slice-3-mailbox-orchestration/tasks.md` are marked complete.

---

### Build & Tests Execution

**Formatting**: ✅ Passed

```text
Command: cargo fmt --all -- --check
Result: exit 0
```

**Clippy**: ✅ Passed

```text
Command: cargo clippy --all-targets -- -D warnings
Result: exit 0
Output: Checking corvus v3.2.0 (/Users/acosta/Dev/corvus/clients/agent-runtime)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 04s
```

**Build**: ✅ Passed

```text
Command: cargo build
Result: Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.63s
```

**Tests**: ✅ Passed targeted verification suite / ❌ 0 failed / ⚠️ 0 skipped

```text
Command set:
- cargo test mailbox_transport_response_is_accepted_for_owning_run
- cargo test misaddressed_mailbox_envelope_is_rejected
- cargo test duplicate_terminal_mailbox_envelope_is_idempotent
- cargo test conflicting_mailbox_replay_fails_closed
- cargo test duplicate_mailbox_delivery_does_not_change_aggregate_ordering
- cargo test sqlite_mailbox_store_appends_leases_acks_and_redelivers
- cargo test sqlite_mailbox_store_isolates_endpoints_and_runs
- cargo test polling_remains_correct_without_wakeup_hints
- cargo test supervised_session_mode_keeps_delegate_contract_with_mailbox_runner
- cargo test mailbox_backed_launch_keeps_handle_and_snapshot_contract
- cargo test rejects_streaming_payload_requests_as_out_of_scope
- cargo test mailbox_backed_inspect_remains_process_local
- cargo test mailbox_backed_inspect_returns_snapshot_for_owning_service
- cargo test mailbox_backed_cancel_does_not_recover_across_services
- cargo test mailbox_backed_cancel_active_run_returns_accepted
- cargo test session_mode_schema_rejects_deferred_transport_fields

Result: all targeted mailbox Slice 3 selectors passed.
Key evidence:
- agent::mailbox::tests::sqlite_mailbox_store_appends_leases_acks_and_redelivers ... ok
- agent::mailbox::tests::sqlite_mailbox_store_isolates_endpoints_and_runs ... ok
- agent::mailbox::tests::polling_remains_correct_without_wakeup_hints ... ok
- agent::coordinator::tests::mailbox_transport_response_is_accepted_for_owning_run ... ok
- agent::coordinator::tests::misaddressed_mailbox_envelope_is_rejected ... ok
- agent::coordinator::tests::duplicate_terminal_mailbox_envelope_is_idempotent ... ok
- agent::coordinator::tests::conflicting_mailbox_replay_fails_closed ... ok
- agent::coordinator::tests::duplicate_mailbox_delivery_does_not_change_aggregate_ordering ... ok
- tools::delegate::tests::supervised_session_mode_keeps_delegate_contract_with_mailbox_runner ... ok
- tools::delegate::tests::session_mode_schema_rejects_deferred_transport_fields ... ok
- tools::delegate_launch::tests::mailbox_backed_launch_keeps_handle_and_snapshot_contract ... ok
- tools::delegate_launch::tests::rejects_streaming_payload_requests_as_out_of_scope ... ok
- tools::delegate_inspect::tests::mailbox_backed_inspect_remains_process_local ... ok
- tools::delegate_inspect::tests::mailbox_backed_inspect_returns_snapshot_for_owning_service ... ok
- tools::delegate_cancel::tests::mailbox_backed_cancel_does_not_recover_across_services ... ok
- tools::delegate_cancel::tests::mailbox_backed_cancel_active_run_returns_accepted ... ok
```

**Coverage**: ➖ Not configured

```text
`openspec/config.yaml` does not define `rules.verify.coverage_threshold`.
```

---

### Spec Compliance Matrix
| Requirement | Scenario | Test | Result |
|-------------|----------|------|--------|
| Internal Mailbox-on-Disk Delivery | Append, poll, deliver, and acknowledge an internal envelope | `clients/agent-runtime/src/agent/mailbox.rs > sqlite_mailbox_store_appends_leases_acks_and_redelivers` | ✅ COMPLIANT |
| Internal Mailbox-on-Disk Delivery | Polling remains correct without a wakeup hint | `clients/agent-runtime/src/agent/mailbox.rs > polling_remains_correct_without_wakeup_hints` | ✅ COMPLIANT |
| Internal Mailbox-on-Disk Delivery | Unacknowledged delivery is redelivered | `clients/agent-runtime/src/agent/mailbox.rs > sqlite_mailbox_store_appends_leases_acks_and_redelivers` | ✅ COMPLIANT |
| Idempotent Duplicate Envelope Application | Duplicate child terminal envelope is ignored after first application | `clients/agent-runtime/src/agent/coordinator.rs > duplicate_terminal_mailbox_envelope_is_idempotent` | ✅ COMPLIANT |
| Idempotent Duplicate Envelope Application | Duplicate delivery does not change aggregate ordering | `clients/agent-runtime/src/agent/coordinator.rs > duplicate_mailbox_delivery_does_not_change_aggregate_ordering` | ✅ COMPLIANT |
| Mailbox Endpoint Isolation | Child endpoint cannot receive another child endpoint's envelope | `clients/agent-runtime/src/agent/mailbox.rs > sqlite_mailbox_store_isolates_endpoints_and_runs` | ✅ COMPLIANT |
| Mailbox Endpoint Isolation | Mailbox rows remain isolated across orchestration runs | `clients/agent-runtime/src/agent/mailbox.rs > sqlite_mailbox_store_isolates_endpoints_and_runs` | ✅ COMPLIANT |
| Structured In-Process Agent Messaging Envelopes | Valid mailbox-backed internal envelope is processed by the owning run | `clients/agent-runtime/src/agent/coordinator.rs > mailbox_transport_response_is_accepted_for_owning_run` | ✅ COMPLIANT |
| Structured In-Process Agent Messaging Envelopes | Misaddressed mailbox envelope is rejected | `clients/agent-runtime/src/agent/coordinator.rs > misaddressed_mailbox_envelope_is_rejected` | ✅ COMPLIANT |
| Parent-Readable Orchestration and Child Lifecycle Inspection | Live parent inspects a mailbox-backed orchestration run | `clients/agent-runtime/src/tools/delegate_inspect.rs > mailbox_backed_inspect_returns_snapshot_for_owning_service` | ✅ COMPLIANT |
| Parent-Readable Orchestration and Child Lifecycle Inspection | Inspection does not recover from parent-process loss | `clients/agent-runtime/src/tools/delegate_inspect.rs > mailbox_backed_inspect_remains_process_local` | ✅ COMPLIANT |
| Parent-Owned Cancellation by Orchestration Handle | Live parent cancels a mailbox-backed orchestration run | `clients/agent-runtime/src/tools/delegate_cancel.rs > mailbox_backed_cancel_active_run_returns_accepted` | ✅ COMPLIANT |
| Parent-Owned Cancellation by Orchestration Handle | Another process cannot reconstruct cancellation authority from mailbox state | `clients/agent-runtime/src/tools/delegate_cancel.rs > mailbox_backed_cancel_does_not_recover_across_services` | ✅ COMPLIANT |
| Slice Boundaries and Deferred Track 4 Work | Remote bridge transport remains unavailable | `clients/agent-runtime/src/tools/delegate.rs > session_mode_schema_rejects_deferred_transport_fields` | ✅ COMPLIANT |
| Slice Boundaries and Deferred Track 4 Work | Tool and result streaming payloads remain unavailable | `clients/agent-runtime/src/tools/delegate_launch.rs > rejects_streaming_payload_requests_as_out_of_scope` | ✅ COMPLIANT |
| Integration and Regression Coverage | Regression suite catches duplicate-induced state corruption | `clients/agent-runtime/src/agent/coordinator.rs > duplicate_terminal_mailbox_envelope_is_idempotent` and `conflicting_mailbox_replay_fails_closed` | ✅ COMPLIANT |
| Integration and Regression Coverage | Regression suite catches cross-endpoint mailbox leakage | `clients/agent-runtime/src/agent/mailbox.rs > sqlite_mailbox_store_isolates_endpoints_and_runs` | ✅ COMPLIANT |

**Compliance summary**: 17/17 scenarios compliant

---

### Correctness (Static — Structural Evidence)
| Requirement | Status | Notes |
|------------|--------|-------|
| Internal Mailbox-on-Disk Delivery | ✅ Implemented | `agent/mailbox.rs` defines SQLite schema, enqueue, lease, ack, release, terminal error handling, polling helpers, wakeup hub, and default DB path under `state/orchestration/mailbox.db`. |
| Idempotent Duplicate Envelope Application | ✅ Implemented | `Coordinator` tracks `applied_messages`, treats same `message_id` + digest as a no-op, rejects conflicting replays, and preserves ordered outcomes by `launch_index`. |
| Mailbox Endpoint Isolation | ✅ Implemented | Lease queries filter by serialized `recipient_endpoint`, and endpoint serialization carries coordinator/run identity. |
| Structured In-Process Agent Messaging Envelopes | ✅ Implemented | `EnvelopeMeta` now carries message ID, sender, recipient, correlation, and transport metadata; `validate_envelope` rejects malformed or misaddressed envelopes. |
| Parent-Readable Orchestration and Child Lifecycle Inspection | ✅ Implemented | Implementation remains parent-owned and process-local, and `mailbox_backed_inspect_returns_snapshot_for_owning_service` plus cross-service rejection cover both positive and negative runtime paths. |
| Parent-Owned Cancellation by Orchestration Handle | ✅ Implemented | Implementation remains parent-owned and process-local, and `mailbox_backed_cancel_active_run_returns_accepted` plus cross-service rejection cover both positive and negative runtime paths. |
| Slice Boundaries and Deferred Track 4 Work | ✅ Implemented | Deferred remote transport fields are rejected at the tool boundary and streaming payload flags are explicitly rejected for mailbox-backed launch. |
| Integration and Regression Coverage | ✅ Implemented | New mailbox, coordinator, and delegate lifecycle regression tests exist in the changed runtime modules. |

---

### Coherence (Design)
| Decision | Followed? | Notes |
|----------|-----------|-------|
| Keep lifecycle entry points stable and add mailbox transport under them | ✅ Yes | `DelegateTool`, `DelegateLaunchTool`, `DelegateCancelTool`, and `DelegateInspectTool` keep stable contracts while `tools/mod.rs` injects a mailbox-backed runner underneath. |
| Introduce one dedicated SQLite mailbox module under `agent/` | ✅ Yes | `clients/agent-runtime/src/agent/mailbox.rs` was created and exported from `agent/mod.rs`. |
| Use logical endpoints for internal mail routing | ✅ Yes | `LogicalEndpoint` is embedded in `EnvelopeMeta` and used in mailbox addressing and envelope validation. |
| At-least-once delivery with lease/ack/redelivery and coordinator idempotency | ✅ Yes | `SqliteMailboxStore` plus `Coordinator::applied_messages` match the design intent. |
| Polling is the correctness path; wakeup is an optimization only | ✅ Yes | `poll_until_lease` / `wait_for_lease` poll independently of wakeup hints. |
| File changes match design table | ✅ Yes | `agent/mailbox.rs`, `agent/mod.rs`, `agent/coordinator.rs`, and the delegate lifecycle tool files were changed as planned; `config/schema.rs` remained unchanged. |
| Design/documentation stays aligned with Slice 3 scope | ⚠️ Deviated | `clients/agent-runtime/src/agent/coordinator.rs` module docs still say mailbox persistence is deferred and the module is intentionally in-process only. |

---

### Issues Found

**CRITICAL** (must fix before archive):
- None.

**WARNING** (should fix):
- `clients/agent-runtime/src/agent/coordinator.rs` still has stale Slice 1 module docs claiming mailbox persistence is deferred.

**SUGGESTION** (nice to have):
- If desired, add one consolidated end-to-end mailbox orchestration test that exercises launch → inspect → cancel in one owning-service flow for audit readability.
- Refresh the coordinator module docs to describe Slice 3 mailbox behavior accurately.

---

### Verdict
PASS WITH WARNINGS

The change now passes verification for Slice 3 behavior: tasks are complete, targeted runtime checks pass, and all 17 spec scenarios have direct passing behavioral evidence. The only remaining issue is a non-blocking documentation mismatch in the coordinator module header.
