> 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-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md).

# Implementation Notes

**Session ID**: `phase24-session03-browser-safe-evidence-assets-file-hardening` **Started**: 2026-06-08 00:02 **Last Updated**: 2026-06-08 02:05

***

## Session Progress

| Metric              | Value     |
| ------------------- | --------- |
| Tasks Completed     | 25 / 25   |
| Estimated Remaining | 0 minutes |
| Blockers            | 0         |

***

### Task T025 - Run focused tests and validation checks

**Started**: 2026-06-08 01:50 **Completed**: 2026-06-08 02:05 **Duration**: 15 minutes

**Notes**:

* Ran focused Trend Finder helper, bridge, schema, Engine Replay, collector, engine trace, and Apify normalizer tests.
* Ran app and scripts type checks after preserving legacy-compatible evidence fixture typing.
* Ran docs/spec formatting checks, ASCII validation across changed files, and git whitespace validation.

**Files Changed**:

* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T025 and completion checklist complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged validation results.
* `src/extensions/trend-finder/schema.ts` - separated parsed/defaulted evidence shape from legacy-compatible hand-built evidence item type.
* `scripts/lib/ai-runtime/snapshots.ts` - kept snapshot schema defaults while preserving hand-built snapshot evidence compatibility.
* `src/extensions/trend-finder/fixtures.ts` - added missing empty-data asset summary.
* `src/extensions/trend-finder/view-model.ts` - guarded optional hand-built evidence asset arrays.
* `scripts/extensions/trend-finder/__tests__/evidence-assets.test.ts` - guarded optional evidence asset access.

**Validation**:

* `bun run test -- scripts/extensions/trend-finder/__tests__/evidence-assets.test.ts scripts/lib/__tests__/trend-finder-asset-bridge.test.ts src/lib/__tests__/trend-finder-schema.test.ts src/lib/__tests__/trend-finder-engine-replay.test.tsx scripts/extensions/trend-finder/__tests__/collector.test.ts scripts/extensions/trend-finder/__tests__/engine-trace.test.ts scripts/extensions/trend-finder/sources/__tests__/apify-normalizers.test.ts` - passed, 157 tests.
* `bun run typecheck` - passed.
* `bun run typecheck:scripts` - passed.
* `bunx prettier --check docs/extensions/trend-finder-ui-surfaces.md docs/extensions/trend-finder-pipeline.md docs/extensions/trend-finder-runtime-and-provenance.md .spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md .spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - passed.
* ASCII validation across changed session files - passed.
* `git diff --check` - passed.

**BQC Fixes**:

* Contract alignment: additive browser schema defaults remain runtime-validated while legacy hand-built test and snapshot evidence rows remain source-compatible.
* Failure path completeness: validation covers missing, invalid, unsupported, oversized, traversal, degraded manifest, and stale pruning paths.

***

### Task T024 - Extend schema, collector, and Engine Replay tests

**Started**: 2026-06-08 01:42 **Completed**: 2026-06-08 01:50 **Duration**: 8 minutes

**Notes**:

* Added schema coverage for additive evidence asset defaults, unsafe bridge URL stripping, legacy data defaults, and asset trace summary ordering.
* Added collector coverage for manifest-to-evidence projection, browser/trace asset summaries, private path stripping, and safe degraded manifest warnings.
* Added Engine Replay coverage for asset metrics, degraded manifest notes, evidence filter counts, and private path non-disclosure.

**Files Changed**:

* `src/lib/__tests__/trend-finder-schema.test.ts` - extended asset schema and trace coverage.
* `scripts/extensions/trend-finder/__tests__/collector.test.ts` - extended collector asset manifest and warning coverage.
* `src/lib/__tests__/trend-finder-engine-replay.test.tsx` - extended replay metric and UI fallback coverage.
* `scripts/extensions/trend-finder/evidence-assets.ts` - made manifest error counts derive a degraded run state.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T024 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged extended test coverage.

**BQC Fixes**:

* Failure path completeness: malformed manifests now produce degraded summaries even when no asset rows survive.
* Error information boundaries: tests assert private cache paths and raw media-like fields do not reach browser-safe payloads.

***

### Task T023 - Write asset bridge tests

**Started**: 2026-06-08 01:38 **Completed**: 2026-06-08 01:42 **Duration**: 4 minutes

**Notes**:

* Added bridge tests for endpoint registration, method rejection, loopback enforcement, token checks, invalid IDs, unsupported content types, missing files, oversized files, traversal fail-closed behavior, and hardened response headers.

**Files Changed**:

* `scripts/lib/__tests__/trend-finder-asset-bridge.test.ts` - created bridge hardening coverage.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T023 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged bridge tests.

**BQC Fixes**:

* Failure path completeness: tests cover denied requests and manifest/file rejection states.
* Error information boundaries: traversal failures return safe not-found errors without exposing private paths.

***

### Task T022 - Write evidence asset helper tests

**Started**: 2026-06-08 01:30 **Completed**: 2026-06-08 01:38 **Duration**: 8 minutes

**Notes**:

* Added tests for stable asset ID derivation, path containment rejection, manifest write/read, bridge projection, file verification, blocked summaries, keep sets, and stale pruning cleanup.

**Files Changed**:

* `scripts/extensions/trend-finder/__tests__/evidence-assets.test.ts` - created helper coverage.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T022 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged helper tests.

**BQC Fixes**:

* Failure path completeness: tests cover traversal rejection and stale file removal.
* Resource cleanup: tests verify stale private asset files are deleted.

***

### Task T021 - Update Trend Finder asset documentation

**Started**: 2026-06-08 01:24 **Completed**: 2026-06-08 01:30 **Duration**: 6 minutes

**Notes**:

* Documented evidence asset preview statuses and UI fallback behavior.
* Documented private manifest location, retention, pruning, path containment, bridge authorization, and response hardening.
* Documented Engine Replay asset summary labels and privacy boundaries.

**Files Changed**:

* `docs/extensions/trend-finder-ui-surfaces.md` - added evidence asset preview behavior and blocked/fallback states.
* `docs/extensions/trend-finder-pipeline.md` - added asset manifest, pruning, and bridge lifecycle documentation.
* `docs/extensions/trend-finder-runtime-and-provenance.md` - added Engine Replay asset summary and privacy boundary documentation.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T021 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged docs implementation.

**BQC Fixes**:

* Contract alignment: docs describe shipped asset contract and explicitly leave static export to the later session.
* Error information boundaries: docs reinforce that browser surfaces never render private paths, raw media URLs, transcripts, Actor internals, Dataset rows, tokens, or logs.

***

### Task T020 - Update committed live-data fallback shape

**Started**: 2026-06-08 01:20 **Completed**: 2026-06-08 01:24 **Duration**: 4 minutes

**Notes**:

* Added top-level `assetSummary` default fields to the committed Trend Finder fallback payload.
* Added empty `evidenceAssets` arrays to fallback evidence rows.
* Kept the committed fallback sanitized and did not claim available media support.

**Files Changed**:

* `src/data/live-data.example.json` - added additive asset fallback fields.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T020 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged fallback shape update.

**BQC Fixes**:

* Contract alignment: committed fallback payload now matches the additive asset schema.
* Error information boundaries: fallback includes no local paths, bridge URLs, raw media, or source internals.

***

### Task T019 - Update Trend Finder asset fixtures

**Started**: 2026-06-08 01:13 **Completed**: 2026-06-08 01:20 **Duration**: 7 minutes

**Notes**:

* Added fixture asset summary counts to Trend Finder data and Engine Trace fixtures.
* Added evidence asset rows covering available, unsupported, blocked, failed, missing, and pruned states.
* Kept fixture asset URLs as opaque local bridge URLs only for the available state.

**Files Changed**:

* `src/extensions/trend-finder/fixtures.ts` - added asset summary and per-evidence fixture assets.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T019 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged fixture implementation.

**BQC Fixes**:

* Contract alignment: fixture evidence rows and summary counts now match the new asset schema states.
* Error information boundaries: fixture assets use compliance docs and bridge URLs, not private paths or raw source media URLs.

***

### Task T018 - Surface asset states in Engine Replay

**Started**: 2026-06-08 01:08 **Completed**: 2026-06-08 01:13 **Duration**: 5 minutes

**Notes**:

* Added an Evidence assets summary block to the Engine Replay evidence panel.
* Surfaced available, blocked, missing/failed, and pruned counts from the replay model.
* Kept the replay layout path unchanged; the rendered panel is owned by `EngineEvidenceFilter`, which is called from `engine-replay-view.tsx`.

**Files Changed**:

* `src/extensions/trend-finder/components/engine-evidence-filter.tsx` - rendered asset summary counters and labels.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T018 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged replay UI implementation.

**BQC Fixes**:

* Error information boundaries: Engine Replay renders aggregate asset labels only, with no file paths, raw URLs, or manifest internals.
* Accessibility and platform compliance: asset counts have list semantics and accessible labels.

***

### Task T017 - Wire preview into evidence cards

**Started**: 2026-06-08 01:04 **Completed**: 2026-06-08 01:08 **Duration**: 4 minutes

**Notes**:

* Rendered evidence asset previews in evidence cards when asset metadata is present.
* Kept source/relevance labels, title, snippets, missing-link warnings, and metric chips intact.
* Used fixed preview dimensions and a flex layout to avoid layout shifts.

**Files Changed**:

* `src/extensions/trend-finder/components/evidence-links.tsx` - wired asset previews into evidence card rendering.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T017 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged evidence card integration.

**BQC Fixes**:

* Accessibility and platform compliance: preview components retain focus/ARIA behavior inside evidence cards.
* Error information boundaries: cards render bridge-backed/fallback metadata only, never manifest paths.

***

### Task T016 - Create evidence asset preview component

**Started**: 2026-06-08 00:57 **Completed**: 2026-06-08 01:04 **Duration**: 7 minutes

**Notes**:

* Added a compact fixed-size preview/fallback component for evidence assets.
* Available assets fetch through `/__token` and the protected asset bridge with `x-claude-os-token`, avoiding token exposure in URLs.
* Added fallback rendering for blocked, unsupported, failed, missing, unavailable, and pruned states.

**Files Changed**:

* `src/extensions/trend-finder/components/evidence-asset-preview.tsx` - created asset preview component.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T016 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged component implementation.

**BQC Fixes**:

* Resource cleanup: asset fetches abort on re-entry/unmount and object URLs are revoked.
* Accessibility and platform compliance: preview slots have stable dimensions, focus treatment, alt text, and ARIA labels.
* Failure path completeness: failed token or asset fetches fall back to visible safe labels.

***

### Task T015 - Add evidence asset preview view models

**Started**: 2026-06-08 00:52 **Completed**: 2026-06-08 00:57 **Duration**: 5 minutes

**Notes**:

* Added `EvidenceAssetPreviewViewModel` and attached preview arrays to evidence links.
* Added exhaustive status labels and tones for available, unavailable, unsupported, blocked, failed, missing, and pruned states.
* Cleared unavailable bridge URLs and generated safe alt/fallback labels from browser-safe evidence metadata.

**Files Changed**:

* `src/extensions/trend-finder/view-model.ts` - projected asset preview data into evidence link view models.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T015 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged view-model implementation.

**BQC Fixes**:

* Contract alignment: all asset statuses are exhaustively mapped before UI rendering.
* Error information boundaries: only asset IDs, status labels, content types, bridge URLs, and fallback labels enter the view model.

***

### Task T014 - Project asset summary into Engine Replay model

**Started**: 2026-06-08 00:46 **Completed**: 2026-06-08 00:52 **Duration**: 6 minutes

**Notes**:

* Added Engine Replay asset summary view models with available, blocked, missing/failed, and pruned counts.
* Added run metric and operational notes for asset availability, blocked compliance states, manifest degradation, empty state, and offline state.
* Resolved trace-backed summaries first, falling back to payload summaries for legacy/missing trace paths.

**Files Changed**:

* `src/extensions/trend-finder/engine-replay-model.ts` - added asset replay metrics, notes, and summary view model projection.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T014 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged replay model implementation.

**BQC Fixes**:

* State freshness on re-entry: replay model derives asset state from current trace/data input each build.
* Failure path completeness: missing, failed, degraded, empty, and offline asset states all map to explicit labels.

***

### Task T013 - Emit sanitized asset trace summaries

**Started**: 2026-06-08 00:41 **Completed**: 2026-06-08 00:46 **Duration**: 5 minutes

**Notes**:

* Added script trace mapper support for aggregate asset summary counts from `sources.collected`.
* Rejected unsafe asset summary objects before mapping to browser trace fields.
* Sorted asset source summaries deterministically by source ID.

**Files Changed**:

* `scripts/extensions/trend-finder/engine-trace.ts` - mapped sanitized aggregate asset summaries into Engine Trace.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T013 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged trace sanitizer implementation.

**BQC Fixes**:

* Error information boundaries: trace asset summaries expose only counts and source IDs.
* Contract alignment: collector `assetSummary` now maps into Engine Trace `assetSummary`.

***

### Task T012 - Prune stale asset manifest entries

**Started**: 2026-06-08 00:40 **Completed**: 2026-06-08 00:41 **Duration**: 1 minute

**Notes**:

* Added active evidence keep-set pruning for the private asset manifest.
* Removed stale asset files through root-contained path resolution and retained stale deletions in summary counts.
* Mapped cleanup failures to `evidence-assets-prune-degraded` warnings without exposing paths.

**Files Changed**:

* `scripts/extensions/trend-finder/collector.ts` - called the pruning helper during collection before browser projection.
* `scripts/extensions/trend-finder/evidence-assets.ts` - helper implementation used by the collector pruning flow.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T012 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged pruning integration.

**BQC Fixes**:

* Resource cleanup: stale private asset files are deleted during manifest pruning and the manifest is rewritten atomically with retained entries.
* Failure path completeness: deletion failures are surfaced as safe warnings and error counts.

***

### Task T011 - Merge asset manifest state into collected evidence

**Started**: 2026-06-08 00:34 **Completed**: 2026-06-08 00:40 **Duration**: 6 minutes

**Notes**:

* Added collector-side asset root resolution under `ctx.cacheDir/assets`.
* Merged manifest-backed asset entries into evidence `evidenceAssets` with opaque local bridge URLs.
* Mapped manifest errors to `evidence-assets-manifest-degraded` warnings and degraded summary counts instead of throwing out the run.

**Files Changed**:

* `scripts/extensions/trend-finder/collector.ts` - merged asset manifest state and emitted `assetSummary`.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T011 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged collector merge implementation.

**BQC Fixes**:

* Failure path completeness: manifest read/parse failures are visible as safe extension warnings and summary errors.
* Contract alignment: collected Trend Finder payloads now include top-level `assetSummary` matching browser schema defaults.

***

### Task T010 - Derive blocked Apify asset states

**Started**: 2026-06-08 00:29 **Completed**: 2026-06-08 00:34 **Duration**: 5 minutes

**Notes**:

* Added blocked asset candidate derivation for source thumbnails, images, media/download URLs, and transcripts/caption fields.
* Kept raw media, transcript, and prohibited text fields excluded from emitted evidence titles/snippets.
* Attached browser-safe blocked asset metadata with compliance doc paths and fallback labels.

**Files Changed**:

* `scripts/extensions/trend-finder/sources/apify-normalizers.ts` - added blocked evidence asset metadata derivation.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T010 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged normalizer asset implementation.

**BQC Fixes**:

* Trust boundary enforcement: raw source asset fields are represented only as blocked metadata unless compliance later approves them.
* Error information boundaries: emitted asset metadata contains no raw media URLs, transcript text, dataset IDs, or private paths.

***

### Task T009 - Register asset bridge in Vite middleware

**Started**: 2026-06-08 00:27 **Completed**: 2026-06-08 00:29 **Duration**: 2 minutes

**Notes**:

* Registered the Trend Finder asset bridge from Vite dev middleware.
* Reused the existing per-server refresh token, `isLoopback` gate, and dev logger.
* Set the generated root to `.cache/extensions/trend-finder/assets`, which is ignored by `.gitignore`.

**Files Changed**:

* `vite.config.ts` - imported and registered `registerTrendFinderAssetBridge`.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T009 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged Vite bridge registration.

**BQC Fixes**:

* Trust boundary enforcement: bridge registration uses the same loopback/token protection as other privileged local middleware.
* State freshness on re-entry: token rotates every dev-server start through the existing Vite token flow.

***

### Task T008 - Create token-gated local asset bridge

**Started**: 2026-06-08 00:21 **Completed**: 2026-06-08 00:27 **Duration**: 6 minutes

**Notes**:

* Added `scripts/lib/trend-finder-asset-bridge.ts` with `GET`/`HEAD` support for opaque asset IDs under `/__trend_finder_asset`.
* Enforced loopback, `x-claude-os-token`, explicit manifest roots, content-type allowlist, bounded file sizes, and no-store dynamic responses.
* Returned stable error codes without private paths.

**Files Changed**:

* `scripts/lib/trend-finder-asset-bridge.ts` - created protected local asset-serving bridge.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T008 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged bridge implementation.

**BQC Fixes**:

* Trust boundary enforcement: requests require loopback, token, manifest-approved asset IDs, and allowed content types.
* Failure path completeness: method, token, loopback, ID, missing file, oversize file, and unsupported type failures return explicit stable codes.
* Error information boundaries: bridge errors never include resolved filesystem paths.

***

### Task T007 - Extend source adapter asset contracts

**Started**: 2026-06-08 00:18 **Completed**: 2026-06-08 00:21 **Duration**: 3 minutes

**Notes**:

* Added source metadata for reviewed evidence asset support, reviewed asset kinds, compliance doc path, and notes.
* Added bounded reviewed asset candidate records with explicit status, kind, content type, provenance label, compliance doc, fallback, and optional manifest path.
* Extended source adapter results to carry asset candidates while preserving existing evidence and analyst evidence behavior.

**Files Changed**:

* `scripts/extensions/trend-finder/sources/types.ts` - added evidence asset support and candidate contracts.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T007 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged source contract implementation.

**BQC Fixes**:

* Trust boundary enforcement: asset availability must now be declared through reviewed source metadata and compliance references, not inferred from raw source fields.
* Contract alignment: source candidates share the browser asset enum/status language while excluding collector-only pruned states.

***

### Task T006 - Create private evidence asset manifest helper

**Started**: 2026-06-08 00:11 **Completed**: 2026-06-08 00:18 **Duration**: 7 minutes

**Notes**:

* Added manifest schema validation, safe deterministic asset IDs, atomic manifest writes, and duplicate-id replacement.
* Added root-contained path resolution that rejects absolute paths, traversal, null bytes, empty segments, and unsafe characters.
* Added browser projection, file verification, aggregate summary counts, and stale manifest/file pruning.

**Files Changed**:

* `scripts/extensions/trend-finder/evidence-assets.ts` - created private asset manifest, projection, verification, and pruning helpers.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T006 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged manifest helper implementation.

**BQC Fixes**:

* Resource cleanup: stale manifest entries remove contained asset files during pruning.
* Trust boundary enforcement: manifest entries are schema-validated and relative paths are resolved below explicit roots only.
* Failure path completeness: invalid manifests, invalid paths, unsupported content types, missing files, and oversize files produce explicit errors or failure results.

***

### Task T005 - Extend Engine Trace asset summary schema

**Started**: 2026-06-08 00:08 **Completed**: 2026-06-08 00:11 **Duration**: 3 minutes

**Notes**:

* Added Engine Trace asset run-state types and aggregate asset/source summary interfaces.
* Added default trace asset summary and parser schema support.
* Normalized trace asset source summaries by safe source ID for deterministic Engine Replay ordering.

**Files Changed**:

* `src/extensions/trend-finder/engine-trace.ts` - added bounded asset summary fields and defaults.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T005 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged trace schema implementation.

**BQC Fixes**:

* Contract alignment: trace and browser payloads now share aggregate asset summary semantics without exposing file-level private data.
* Error information boundaries: trace asset fields are aggregate counts and source IDs only.

***

### Task T004 - Extend Trend Finder asset browser schema

**Started**: 2026-06-08 00:03 **Completed**: 2026-06-08 00:08 **Duration**: 5 minutes

**Notes**:

* Added bounded evidence asset kind, status, content-type, and run-state enums.
* Added browser-safe `TrendEvidenceAssetSchema`, source/run summary schemas, default objects, and top-level `assetSummary`.
* Added additive `evidenceAssets` defaults on evidence items so legacy payloads continue parsing with empty asset arrays.

**Files Changed**:

* `src/extensions/trend-finder/schema.ts` - added asset metadata schemas, summary defaults, and evidence payload fields.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T004 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged schema implementation.

**BQC Fixes**:

* Contract alignment: asset statuses, content types, bridge URL shape, and summary counters now have explicit browser schema defaults.
* Error information boundaries: bridge URLs are same-origin endpoint paths only; arbitrary filesystem paths are cleared by schema parsing.

***

### Task T003 - Confirm Trend Finder bridge token patterns

**Started**: 2026-06-08 00:03 **Completed**: 2026-06-08 00:03 **Duration**: 1 minute

**Notes**:

* Confirmed `vite.config.ts` creates a per-dev-server `REFRESH_TOKEN`, stores it in the existing `.ai-os/dev-token` flow, and reuses `isLoopback` for privileged local middleware.
* Confirmed Trend Finder Creator Lens bridge already uses `x-claude-os-token`, loopback checks, and no-store JSON responses; the asset bridge will follow that local contract.

**Files Changed**:

* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T003 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged bridge-pattern verification.

**BQC Fixes**:

* Trust boundary enforcement: confirmed token and loopback checks are mandatory for the new asset bridge registration.
* Error information boundaries: confirmed bridge responses should use stable error codes and avoid private file paths.

***

### Task T002 - Confirm private generated asset roots

**Started**: 2026-06-08 00:02 **Completed**: 2026-06-08 00:03 **Duration**: 1 minute

**Notes**:

* Confirmed `.cache/` is ignored and is the correct repo-local generated runtime root for private Trend Finder asset manifests and files.
* Confirmed generated `src/data/live-data.json` remains ignored while `src/data/live-data.example.json` is the committed sanitized fallback.

**Files Changed**:

* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T002 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged cache-root verification.

**BQC Fixes**:

* Resource cleanup: established `.cache/extensions/trend-finder` as the explicit generated root the pruning helper must clean within.

***

### Task T001 - Verify source compliance asset permissions

**Started**: 2026-06-08 00:02 **Completed**: 2026-06-08 00:02 **Duration**: 1 minute

**Notes**:

* Verified YouTube compliance keeps audiovisual content, cached thumbnails, transcripts, comments, private channel data, and authorized account data out of browser-safe artifacts.
* Confirmed RSS/news and Reddit compliance docs also block media downloads, comment bodies, profile data, and unreviewed full-content reuse.
* Default asset states for current unapproved media will be blocked or unsupported, not available.

**Files Changed**:

* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/tasks.md` - marked T001 complete.
* `.spec_system/specs/phase24-session03-browser-safe-evidence-assets-file-hardening/implementation-notes.md` - logged setup verification.

**BQC Fixes**:

* Trust boundary enforcement: confirmed source compliance remains the boundary closest to source normalization before browser asset metadata can become available.

***

## Task Log

### 2026-06-08 - Session Start

**Environment verified**:

* [x] Prerequisites confirmed
* [x] Tools available
* [x] Directory structure ready

***


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