> 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/phase24-session02-delta-aware-enrichment-spend-accounting/validation.md).

# Validation Report

**Session ID**: `phase24-session02-delta-aware-enrichment-spend-accounting` **Validated**: 2026-06-07 **Result**: PASS

***

## Validation Summary

| Check                     | Status     | Notes                                                                                                     |
| ------------------------- | ---------- | --------------------------------------------------------------------------------------------------------- |
| Tasks Complete            | PASS       | 25/25 tasks complete                                                                                      |
| Files Exist               | PASS       | 20/20 deliverables found                                                                                  |
| ASCII Encoding            | PASS       | All session deliverables are ASCII text with LF endings                                                   |
| Tests Passing             | PASS       | 200/200 targeted tests passed                                                                             |
| Database/Schema Alignment | N/A        | No DB-layer changes in this session                                                                       |
| Quality Gates             | PASS       | Typecheck, diff check, and encoding checks passed                                                         |
| Conventions               | PASS       | `.spec_system/CONVENTIONS.md` exists and session changes align with it                                    |
| Security & GDPR           | PASS / N/A | See `security-compliance.md`; no security findings, GDPR N/A                                              |
| Behavioral Quality        | PASS       | Application code spot-check showed no trust boundary, cleanup, mutation, failure-path, or contract issues |

**Overall**: PASS

***

## 1. Task Completion

### Status: PASS

| Category       | Required | Completed | Status |
| -------------- | -------- | --------- | ------ |
| Setup          | 3        | 3         | PASS   |
| Foundation     | 6        | 6         | PASS   |
| Implementation | 12       | 12        | PASS   |
| Testing        | 4        | 4         | PASS   |

### Incomplete Tasks

None.

***

## 2. Deliverables Verification

### Status: PASS

#### Files Created or Modified

| File                                                                 | Found | Status |
| -------------------------------------------------------------------- | ----- | ------ |
| `scripts/extensions/trend-finder/enrichment-cache.ts`                | Yes   | PASS   |
| `scripts/extensions/trend-finder/spend-accounting.ts`                | Yes   | PASS   |
| `scripts/extensions/trend-finder/__tests__/enrichment-cache.test.ts` | Yes   | PASS   |
| `scripts/extensions/trend-finder/__tests__/spend-accounting.test.ts` | Yes   | PASS   |
| `scripts/extensions/trend-finder/sources/types.ts`                   | Yes   | PASS   |
| `scripts/lib/apify/types.ts`                                         | Yes   | PASS   |
| `scripts/lib/apify/actors.ts`                                        | Yes   | PASS   |
| `scripts/extensions/trend-finder/sources/apify-adapter.ts`           | Yes   | PASS   |
| `scripts/extensions/trend-finder/sources/google-trends-demand.ts`    | Yes   | PASS   |
| `scripts/extensions/trend-finder/collector.ts`                       | Yes   | PASS   |
| `scripts/extensions/trend-finder/engine-trace.ts`                    | Yes   | PASS   |
| `src/extensions/trend-finder/schema.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/sources-view.tsx`                 | Yes   | PASS   |
| `src/extensions/trend-finder/fixtures.ts`                            | Yes   | PASS   |
| `src/data/live-data.example.json`                                    | Yes   | PASS   |
| `docs/extensions/trend-finder-pipeline.md`                           | Yes   | PASS   |
| `docs/extensions/trend-finder-sources.md`                            | Yes   | PASS   |
| `docs/extensions/trend-finder-runtime-and-provenance.md`             | Yes   | PASS   |

### Missing Deliverables

None.

***

## 3. ASCII Encoding Check

### Status: PASS

| File                                                                 | Encoding | Line Endings | Status |
| -------------------------------------------------------------------- | -------- | ------------ | ------ |
| `scripts/extensions/trend-finder/enrichment-cache.ts`                | ASCII    | LF           | PASS   |
| `scripts/extensions/trend-finder/spend-accounting.ts`                | ASCII    | LF           | PASS   |
| `scripts/extensions/trend-finder/__tests__/enrichment-cache.test.ts` | ASCII    | LF           | PASS   |
| `scripts/extensions/trend-finder/__tests__/spend-accounting.test.ts` | ASCII    | LF           | PASS   |
| `scripts/extensions/trend-finder/sources/types.ts`                   | ASCII    | LF           | PASS   |
| `scripts/lib/apify/types.ts`                                         | ASCII    | LF           | PASS   |
| `scripts/lib/apify/actors.ts`                                        | ASCII    | LF           | PASS   |
| `scripts/extensions/trend-finder/sources/apify-adapter.ts`           | ASCII    | LF           | PASS   |
| `scripts/extensions/trend-finder/sources/google-trends-demand.ts`    | ASCII    | LF           | PASS   |
| `scripts/extensions/trend-finder/collector.ts`                       | ASCII    | LF           | PASS   |
| `scripts/extensions/trend-finder/engine-trace.ts`                    | ASCII    | LF           | PASS   |
| `src/extensions/trend-finder/schema.ts`                              | ASCII    | LF           | PASS   |
| `src/extensions/trend-finder/engine-trace.ts`                        | ASCII    | LF           | PASS   |
| `src/extensions/trend-finder/engine-replay-model.ts`                 | ASCII    | LF           | PASS   |
| `src/extensions/trend-finder/views/sources-view.tsx`                 | ASCII    | LF           | PASS   |
| `src/extensions/trend-finder/fixtures.ts`                            | ASCII    | LF           | PASS   |
| `src/data/live-data.example.json`                                    | ASCII    | LF           | PASS   |
| `docs/extensions/trend-finder-pipeline.md`                           | ASCII    | LF           | PASS   |
| `docs/extensions/trend-finder-sources.md`                            | ASCII    | LF           | PASS   |
| `docs/extensions/trend-finder-runtime-and-provenance.md`             | ASCII    | LF           | PASS   |

### Encoding Issues

None.

***

## 4. Test Results

### Status: PASS

| Metric      | Value |
| ----------- | ----- |
| Total Tests | 200   |
| Passed      | 200   |
| Failed      | 0     |
| Coverage    | N/A   |

### Failed Tests

None.

***

## 5. Database/Schema Alignment

### Status: N/A

N/A -- no DB-layer changes.

### Issues Found

None.

***

## 6. Success Criteria

From `spec.md`:

### Functional Requirements

* [x] Re-running the collector with unchanged source item IDs skips eligible enrichment and reports saved or skipped work.
* [x] Changed metadata fingerprints cause enrichment cache misses instead of reusing stale summaries.
* [x] Cache pruning removes entries outside the active evidence keep set without deleting current evidence summaries.
* [x] Apify and Google Trends demand spend summaries show exact usage when available and estimates from caps when exact charges are unavailable.
* [x] Engine Replay and Sources show cache/spend state without raw billing payloads, account IDs, tokens, raw Dataset rows, raw enrichment payloads, Actor internals, or private cache paths.

### Testing Requirements

* [x] Unit tests cover cache keys, schema validation, hits, misses, stale fingerprints, path containment, atomic writes, and pruning.
* [x] Adapter tests cover Apify actual usage, max-charge estimates, Google Trends demand charge limits, redaction, and missing-token fallbacks.
* [x] Schema tests prove legacy Trend Finder and Engine Trace payloads still parse with default unavailable/zero-count summaries.
* [x] View-model and UI tests cover exact, estimated, cadence-unavailable, empty, degraded, and offline states.

### Quality Gates

* [x] All files ASCII-encoded.
* [x] Unix LF line endings.
* [x] Code follows project conventions.
* [x] No new dependencies were introduced.

***

## 7. Conventions Compliance

### Status: PASS

| Category       | Status | Notes                                                                            |
| -------------- | ------ | -------------------------------------------------------------------------------- |
| Naming         | PASS   | Session names and new identifiers follow project and Trend Finder conventions.   |
| File Structure | PASS   | Script, test, view-model, fixture, and docs files are in the expected locations. |
| Error Handling | PASS   | Cache, spend, and collector paths degrade to explicit safe states and warnings.  |
| Comments       | PASS   | No comment hygiene issues observed in the deliverables reviewed.                 |
| Testing        | PASS   | Focused unit, adapter, schema, replay, and UI tests were added and passed.       |

### Convention Violations

None.

***

## 8. Security & GDPR Compliance

### Status: PASS / N/A

**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/enrichment-cache.ts`
* `scripts/extensions/trend-finder/spend-accounting.ts`
* `scripts/extensions/trend-finder/collector.ts`
* `src/extensions/trend-finder/engine-replay-model.ts`
* `src/extensions/trend-finder/views/sources-view.tsx`

| Category           | Status | File                                                  | Details                                                                   |
| ------------------ | ------ | ----------------------------------------------------- | ------------------------------------------------------------------------- |
| Trust boundaries   | PASS   | `scripts/extensions/trend-finder/enrichment-cache.ts` | Cache entries are schema-validated and narrowed before reuse.             |
| Resource cleanup   | PASS   | `scripts/extensions/trend-finder/enrichment-cache.ts` | Atomic writes use temp-file replacement under contained paths.            |
| Mutation safety    | PASS   | `scripts/extensions/trend-finder/collector.ts`        | Cache reuse and pruning are gated by stable evidence and keep-set checks. |
| Failure paths      | PASS   | `scripts/extensions/trend-finder/spend-accounting.ts` | Missing usage degrades to explicit estimated or unavailable states.       |
| Contract alignment | PASS   | `src/extensions/trend-finder/engine-replay-model.ts`  | Browser-safe metrics and notes align with the additive schema.            |

### Violations Found

None.

### Fixes Applied During Validation

None.

## Validation Result

### PASS

Session deliverables are complete, tests passed, ASCII/LF checks passed, and the new cache/spend surfaces remain bounded and browser-safe.

### Required Actions

None.

## Next Steps

Run `updateprd` to mark the session complete.


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