# Structured Fail-Closed Improvement Roadmap Closure Report

> Date: 2026-04-19
> Plan: `docs/superpowers/plans/2026-04-19-structured-fail-closed-improvement-roadmap-plan.md`
> Status: Closed

## Scope

This roadmap handled the `48` structured fail-closed records from the reconciled `102` scene sweep.

The roadmap boundary explicitly excluded:

1. new scene families
2. `G4/G5`
3. login recovery
4. full host runtime transport
5. local document attachment runtime
6. `scene_execution_board_2026-04-18.json` updates
7. direct scene promotion
8. timeout implementation work
9. readiness gate relaxation

Those boundaries were preserved.

## Completed Phases

### Phase 0: Freeze Structured Fail-Closed Baseline

Completed.

Input baseline:

| Status | Count |
| --- | ---: |
| `auto-pass` | 48 |
| `fail-closed-known` | 48 |
| `adjudicated-valid-host-bridge` | 4 |
| `source-unreadable` | 2 |
| Total | 102 |

Only `fail-closed-known` records entered the inventory phase.

### Phase 1: Inventory and Gap Taxonomy

Completed.

Deliverables:

1. `tests/fixtures/generated_scene/structured_fail_closed_inventory_2026-04-19.json`
2. `docs/superpowers/reports/2026-04-19-structured-fail-closed-inventory-report.md`

Inventory summary:

| Primary label | Count |
| --- | ---: |
| `enrichment_request_missing` | 23 |
| `export_plan_missing` | 12 |
| `local_doc_contract_missing` | 5 |
| `mode_request_contract_missing` | 4 |
| `single_request_enrichment_contract_missing` | 2 |
| `bootstrap_target_unresolved` | 2 |

The `paginated_enrichment` bucket was split into:

| Primary label | Count |
| --- | ---: |
| `enrichment_request_missing` | 23 |
| `export_plan_missing` | 12 |

### Phase 2: G3 Paginated Enrichment Recovery Slice

Completed as a bounded evidence-preservation slice.

The top repeated G3 gap was `enrichment_request_missing`, but there was not enough traceable evidence to safely synthesize missing enrichment requests without relaxing the `G3` contract.

Instead, the implementation improved structured fail-closed observability by embedding `contractSnapshot` in pre-package fail-closed reports. This preserves the full `SceneIr` for future recovery analysis while keeping the result fail-closed.

Changed implementation:

1. `src/generated_scene/generator.rs`
2. `tests/scene_generator_test.rs`

This slice did not:

1. hardcode scene names
2. relax gates
3. convert incomplete `G3` records into pass
4. change canonical `G3` behavior

### Phase 3: Small-Bucket Recovery Slice

Completed as inspection and explicit deferral.

Deliverable:

`docs/superpowers/reports/2026-04-19-structured-fail-closed-small-bucket-decision-report.md`

No small-bucket implementation slice was started because the largest remaining value stayed in the `G3` structured fail-closed bucket, and the plan allowed at most one non-G3 bounded slice.

### Phase 4: Bootstrap Target Isolation

Completed.

Deliverable:

`docs/superpowers/reports/2026-04-19-structured-fail-closed-bootstrap-isolation-report.md`

Bootstrap target records were kept out of G3 and small-bucket recovery. No login recovery or bootstrap auto-recovery was implemented.

### Phase 5: Follow-Up Sweep and Coverage Delta

Completed.

Deliverables:

1. `tests/fixtures/generated_scene/structured_fail_closed_improvement_followup_2026-04-19.json`
2. `docs/superpowers/reports/2026-04-19-structured-fail-closed-improvement-coverage-delta-report.md`

Follow-up summary:

| Status | Baseline | Follow-up | Delta |
| --- | ---: | ---: | ---: |
| `auto-pass` | 48 | 48 | 0 |
| `fail-closed-known` | 48 | 47 | -1 |
| `adjudicated-valid-host-bridge` | 4 | 4 | 0 |
| `source-unreadable` | 2 | 3 | +1 |

The follow-up did not improve pass count and exposed one additional timeout:

`sweep-040-scene` / `嘉峪关日报`

## Validation

The implementation slice was validated with:

1. `cargo test --test scene_generator_test generator_blocks_incomplete_paginated_enrichment_workflow -- --nocapture`
2. `cargo test --test scene_generator_canonical_test -- --nocapture`

Both passed.

The fixed `102` scene follow-up sweep completed and wrote:

`tests/fixtures/generated_scene/structured_fail_closed_improvement_followup_2026-04-19.json`

## Closure Decision

This roadmap is closed.

It completed its required inventory, bounded implementation, small-bucket inspection, bootstrap isolation, follow-up sweep, and delta report.

The outcome is not a coverage increase. The outcome is better structured fail-closed evidence plus a measured follow-up baseline:

| Metric | Result |
| --- | --- |
| `auto-pass` coverage | unchanged at `48/102` |
| broad actionable count | `100 -> 99` |
| remaining structured fail-closed | `47` |
| remaining timeout | `3` |

## Next Inputs

The next work is outside this roadmap.

Highest-value inputs are:

1. bounded timeout regression diagnostic for `sweep-040-scene`
2. timeout diagnostic for the two persistent timeout records
3. a new bounded recovery roadmap for the remaining `34` `paginated_enrichment` structured fail-closed records

No next roadmap is started by this closure report.