# Verification Report: 2026-04-23-track-4-slice-5-local-isolation-contract

## Status

PASS

## Executive Summary

Re-ran verification for **Track 4 Slice 5 — Local Isolation Contract** after the previously observed workspace formatting regression was fixed.

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

- accepted local children are bound to enforceable repository/worktree/access guarantees;
- unenforceable local isolation requests are rejected fail-closed;
- requested-versus-enforced metadata is surfaced through launch/inspect behavior;
- `in_process` and `mailbox` transports preserve the same admitted local scope.

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

## Artifacts Read

- `openspec/changes/2026-04-23-track-4-slice-5-local-isolation-contract/proposal.md`
- `openspec/changes/2026-04-23-track-4-slice-5-local-isolation-contract/design.md`
- `openspec/changes/2026-04-23-track-4-slice-5-local-isolation-contract/tasks.md`
- `openspec/changes/2026-04-23-track-4-slice-5-local-isolation-contract/specs/multi-agent-orchestration/spec.md`
- `openspec/changes/2026-04-23-track-4-slice-5-local-isolation-contract/apply-report.md`
- `openspec/changes/2026-04-23-track-4-slice-5-local-isolation-contract/state.yaml`
- `openspec/config.yaml`

## Completeness Check

### Tasks

All tasks are checked complete.

- Total tasks: 13
- Completed: 13
- Incomplete: 0

## Spec Compliance

### Requirement: Enforceable Local Execution Isolation Contract

**Status:** PASS

Structural evidence:
- `clients/agent-runtime/src/agent/coordinator.rs`
  - `bind_local_isolation_contract(...)`
  - normalized requested fields:
    - `repository_id`
    - `worktree_id`
    - `read_only_project_access`
  - enforced guarantee fields:
    - `repository_isolation_enforced`
    - `worktree_isolation_enforced`
- `clients/agent-runtime/src/tools/delegate_launch.rs`
- `clients/agent-runtime/src/tools/delegate_inspect.rs`

Behavioral evidence from the re-run suites includes:
- `admit_child_normalizes_requested_vs_enforced_execution_metadata`
- `admit_child_applies_same_repository_and_worktree_contract_for_in_process_transport`
- `mailbox_backed_launch_preserves_enforced_local_isolation_contract`
- `inspect_surfaces_requested_vs_enforced_local_isolation_fields`
- `child_execution_metadata_view_serializes_requested_and_enforced_fields`

Scenario coverage:
- accepted local child remains bound to enforced repository/worktree scope: PASS
- system does not silently allow different repository/worktree context: PASS

### Requirement: Fail-Closed Rejection When Local Isolation Cannot Be Enforced

**Status:** PASS

Behavioral evidence:
- `admit_child_rejects_worktree_without_repository_fail_closed`
- `admit_child_rejects_unsupported_isolation_requests_fail_closed`
- `admit_child_rejects_unsupported_permission_broker_requests_fail_closed`
- `admit_child_rejects_remote_bridge_requests_fail_closed`

Scenario coverage:
- launch rejected when repository/worktree/access posture cannot be enforced: PASS
- runtime does not silently downgrade to weaker guarantees: PASS

### Requirement: Inspection Distinguishes Requested Metadata from Enforced Guarantees

**Status:** PASS

Behavioral evidence:
- `inspect_surfaces_requested_vs_enforced_local_isolation_fields`
- `inspect_surfaces_requested_vs_enforced_metadata_and_lifecycle_events`
- `child_execution_metadata_view_serializes_requested_and_enforced_fields`

Scenario coverage:
- parent inspection distinguishes requested isolation from enforced guarantees: PASS
- stronger deferred/unsupported modes are not misreported as enforced: PASS

### Requirement: Transport Choice Must Not Weaken Accepted Local Scope

**Status:** PASS

Behavioral evidence:
- `admit_child_applies_same_repository_and_worktree_contract_for_in_process_transport`
- `mailbox_backed_launch_preserves_enforced_local_isolation_contract`

Scenario coverage:
- `in_process` and `mailbox` accepted children preserve the same admitted local contract: PASS

## Design Conformance

**Status:** PASS

The implementation follows the major design decisions:

1. **Keep enforcement local-only and bounded to delivered Track 4 transports** — followed
2. **Enforce repository/worktree/access guarantees in coordinator admission** — followed
3. **Fail closed when requested local contract cannot be enforced** — followed
4. **Expose requested versus enforced distinction consistently through launch/inspect** — followed
5. **Transport choice must not weaken admitted scope** — followed
6. **Do not widen into cloned worktrees/repos, sandbox cloning, recovery/reattach, or child-owned authority** — 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. Isolation-focused tests

Command:

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

Result: **PASS**

Observed suite output included 7 passing isolation-focused tests with 0 failures.

### 4. Targeted delegate inspect tests

Command:

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

Result: **PASS**

Observed suite output included 14 passing delegate-inspect tests with 0 failures.

## Coverage Assessment

**Status:** ADEQUATE FOR SLICE

The scoped verification covers the behavior introduced by this slice:
- coordinator admission validation for local isolation requests;
- fail-closed rejection for unsupported or inconsistent requests;
- launch/inspect reporting of requested versus enforced guarantees;
- mailbox transport parity for admitted local isolation scope.

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.
