# Boundary Fail-Closed Decision Report

Date: 2026-04-19

Parent framework: `2026-04-19-scene-skill-102-full-coverage-framework-plan`

Parent route: `Route 5 / boundary-family fail-closed`

Plan: `2026-04-19-boundary-fail-closed-decision-plan.md`

## Scope

This is a decision-only route. It does not change analyzer/generator code and does not update the execution board.

Fixed Route 5 input buckets:

| Bucket | Count |
| --- | ---: |
| `local_doc_pipeline` | 5 |
| `host_bridge_workflow` | 1 |
| `page_state_eval/bootstrap_target` | 1 |

## Decisions

| Bucket | Decision | Reason |
| --- | --- | --- |
| `local_doc_pipeline` | `hold-as-boundary-fail-closed` | Requires local document runtime and attachment handling beyond the current full-coverage implementation routes. |
| `host_bridge_workflow` | `hold-as-boundary-fail-closed` | Remaining boundary record depends on host bridge execution semantics outside this decision-only route. |
| `page_state_eval/bootstrap_target` | `isolate-bootstrap-target` | Bootstrap target resolution is a separate navigation/login target problem and must stay isolated from contract recovery. |

## Result

Route 5 produces no code-level coverage delta. Its expected delta is decision quality:

- unresolved boundary ambiguity: `0`
- open boundary implementation slices: `0`
- held/deferred boundary records: `7`

## Boundary

This route did not:

- modify `src/generated_scene/analyzer.rs`
- modify `src/generated_scene/generator.rs`
- update `tests/fixtures/generated_scene/scene_execution_board_2026-04-18.json`
- start boundary implementation
- create a new family

## Stop Statement

Route 5 is decision-complete. The next child plan in the 102 full-coverage sequence is Route 6:

`2026-04-19-promotion-and-board-reconciliation-policy-plan.md`