> For the complete documentation index, see [llms.txt](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/.spec_system/archive/sessions/phase29-session07-per-stage-validation-narration/validation.md).

# Validation Report

**Session ID**: `phase29-session07-per-stage-validation-narration` **Validated**: 2026-06-20 **Result**: PASS

***

## Validation Summary

| Check                     | Status | Notes                                                                                         |
| ------------------------- | ------ | --------------------------------------------------------------------------------------------- |
| Tasks Complete            | PASS   | 20/20 tasks                                                                                   |
| Files Exist               | PASS   | 13/13 planned deliverables                                                                    |
| ASCII Encoding            | PASS   | Planned deliverables, validation fix, and session docs are ASCII with LF endings              |
| Tests Passing             | PASS   | 3,774/3,774 project tests passed                                                              |
| Database/Schema Alignment | N/A    | N/A - no DB-layer or persisted schema changes                                                 |
| Quality Gates             | PASS   | Typecheck, script typecheck, lint, payload, privacy, formatting, and whitespace checks passed |
| Conventions               | PASS   | Spot-check found no naming, structure, error handling, comment, or testing violations         |
| Security & GDPR           | PASS   | See `security-compliance.md`; GDPR N/A for data collection                                    |
| Behavioral Quality        | PASS   | BQC applied to helper, collector, trace, model, and view paths                                |

**Overall**: PASS

***

## 1. Task Completion

### Status: PASS

| Category       | Required | Completed | Status |
| -------------- | -------- | --------- | ------ |
| Setup          | 2        | 2         | PASS   |
| Foundation     | 5        | 5         | PASS   |
| Implementation | 9        | 9         | PASS   |
| Testing        | 4        | 4         | PASS   |

### Incomplete Tasks

None.

***

## 2. Deliverables Verification

### Status: PASS

#### Files Created

| File                                                                 | Found | Status |
| -------------------------------------------------------------------- | ----- | ------ |
| `scripts/extensions/trend-finder/stage-validation.ts`                | Yes   | PASS   |
| `scripts/extensions/trend-finder/__tests__/stage-validation.test.ts` | Yes   | PASS   |
| `scripts/extensions/trend-finder/collector.ts`                       | Yes   | PASS   |
| `scripts/extensions/trend-finder/engine-trace.ts`                    | Yes   | PASS   |
| `src/extensions/trend-finder/engine-trace.ts`                        | Yes   | PASS   |
| `src/extensions/trend-finder/engine-replay-model.ts`                 | Yes   | PASS   |
| `src/extensions/trend-finder/views/engine-replay-view.tsx`           | Yes   | PASS   |
| `src/extensions/trend-finder/fixtures.ts`                            | Yes   | PASS   |
| `scripts/extensions/trend-finder/__tests__/collector.test.ts`        | Yes   | PASS   |
| `scripts/extensions/trend-finder/__tests__/engine-trace.test.ts`     | Yes   | PASS   |
| `src/lib/__tests__/trend-finder-engine-replay.test.tsx`              | Yes   | PASS   |
| `scripts/extensions/trend-finder/measure-payload-size.ts`            | Yes   | PASS   |
| `docs/extensions/trend-finder-pipeline.md`                           | Yes   | PASS   |

### Missing Deliverables

None.

***

## 3. ASCII Encoding Check

### Status: PASS

| File                                           | Encoding | Line Endings | Status |
| ---------------------------------------------- | -------- | ------------ | ------ |
| Planned deliverables                           | ASCII    | LF           | PASS   |
| `scripts/lib/ai-runtime/evidence-rationale.ts` | ASCII    | LF           | PASS   |
| Session spec artifacts                         | ASCII    | LF           | PASS   |

### Encoding Issues

None.

***

## 4. Test Results

### Status: PASS

| Metric      | Value         |
| ----------- | ------------- |
| Total Tests | 3,774         |
| Passed      | 3,774         |
| Failed      | 0             |
| Coverage    | Not collected |

### Commands

* `bun run test` - 320 files passed, 3,774 tests passed.
* `bun run typecheck:scripts` - Passed.
* `bun run typecheck` - Passed.
* `bun run lint` - Passed after validator fix.
* `bun test ./scripts/lib/ai-runtime/__tests__/evidence-rationale.test.ts ./scripts/lib/ai-runtime/__tests__/trend-analyst.test.ts` - 43 tests passed.
* `bun run runtime:check-private` - Passed.
* `bun run scripts/extensions/trend-finder/measure-payload-size.ts src/data/live-data.example.json --threshold-kb=0 --json` - Browser data payload 14,138 bytes under the 1,048,576-byte boundary.
* `bunx prettier --check ...` - Passed for planned deliverables, validation fix, and session docs.
* `git diff --check` - Passed.

### Failed Tests

None.

***

## 5. Database/Schema Alignment

### Status: N/A

N/A - the session introduced no DB-layer changes, migrations, persisted schema files, constraints, indexes, seeds, generated database types, or database-backed storage paths.

### Issues Found

N/A - no DB-layer changes.

***

## 6. Success Criteria

From `spec.md`:

### Functional Requirements

* [x] A forced enrichment-stage failure records a narrated degraded state in Engine Replay.
* [x] A failing stage retries at most once and exposes retry count as a safe integer.
* [x] Stage narration identifies only safe stage ID, status, issue code, degradation path, and short sanitized message text.
* [x] Legacy payloads without stage narration parse and render without crashing.
* [x] Existing deterministic fallback output remains intact when narration records a degraded state.
* [x] Source-death alarms and required-field closeout gates remain unimplemented in this session.

### Testing Requirements

* [x] Unit tests written and passing for retry-once behavior, degraded result construction, abort handling, and unsafe value rejection.
* [x] Collector tests prove a forced failure emits a safe trace row and preserves deterministic fallback behavior.
* [x] Engine trace tests prove unsafe keys and values do not reach `stageNarrations`.
* [x] Engine Replay model/view tests prove degraded, empty, legacy, and offline states render safely.
* [x] Payload-size and privacy scan checks remain green.

### Quality Gates

* [x] All files ASCII-encoded.
* [x] Unix LF line endings.
* [x] Code follows project conventions.
* [x] New enum or schema branches use explicit fallback behavior.

***

## 7. Conventions Compliance

### Status: PASS

| Category       | Status | Notes                                                                                                                     |
| -------------- | ------ | ------------------------------------------------------------------------------------------------------------------------- |
| Naming         | PASS   | Stage IDs, issue codes, degradation paths, helper names, and view-model names are descriptive and scoped to Trend Finder. |
| File Structure | PASS   | Script helper/tests, browser schema/model/view, fixtures, docs, and tests follow existing repo structure.                 |
| Error Handling | PASS   | Helper owns bounded retry and deterministic degrade paths; thrown failures are sanitized before browser output.           |
| Comments       | PASS   | No obvious commented-out code or noisy comments added.                                                                    |
| Testing        | PASS   | Tests cover behavior and privacy boundaries close to the changed code.                                                    |

### Convention Violations

None.

***

## 8. Security & GDPR Compliance

### Status: PASS

**Full report**: See `security-compliance.md` in this session directory.

#### Summary

| Area     | Status | Findings |
| -------- | ------ | -------- |
| Security | PASS   | 0 issues |
| GDPR     | N/A    | 0 issues |

### Critical Violations

None.

***

## 9. Behavioral Quality Spot-Check

### Status: PASS

**Checklist applied**: Yes **Files spot-checked**:

* `scripts/extensions/trend-finder/stage-validation.ts`
* `scripts/extensions/trend-finder/collector.ts`
* `scripts/extensions/trend-finder/engine-trace.ts`
* `src/extensions/trend-finder/engine-trace.ts`
* `src/extensions/trend-finder/engine-replay-model.ts`
* `src/extensions/trend-finder/views/engine-replay-view.tsx`

| Category           | Status | File                                                  | Details                                                                                  |
| ------------------ | ------ | ----------------------------------------------------- | ---------------------------------------------------------------------------------------- |
| Trust boundaries   | PASS   | `scripts/extensions/trend-finder/engine-trace.ts`     | Unsafe keys and values are rejected before browser trace output.                         |
| Resource cleanup   | PASS   | `scripts/extensions/trend-finder/stage-validation.ts` | No resources acquired; abort signal is checked before attempts and retries.              |
| Mutation safety    | PASS   | `scripts/extensions/trend-finder/stage-validation.ts` | Retry count is local to a call and clamped to at most one retry.                         |
| Failure paths      | PASS   | `scripts/extensions/trend-finder/collector.ts`        | Degraded paths preserve deterministic fallback output and emit safe narration.           |
| Contract alignment | PASS   | `src/extensions/trend-finder/engine-trace.ts`         | `stageNarrations` is additive, capped, sorted, and defaults to `[]` for legacy payloads. |

### Violations Found

None.

### Fixes Applied During Validation

* Replaced the control-character regex in `scripts/lib/ai-runtime/evidence-rationale.ts` with character-code sanitization so full ESLint passes without changing sanitizer behavior.
* Ran focused evidence-rationale and trend-analyst tests after the lint fix.
* Normalized the three session markdown files with Prettier after targeted formatting flagged them.

## Validation Result

### PASS

Session 07 satisfies the task checklist, deliverables, tests, browser-safe trace privacy boundary, payload budget, conventions spot-check, and behavioral quality review.

### Required Actions

None.

## Next Steps

Run `updateprd` to mark session complete.


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