---
phase: 07-audit-trail-and-download
plan: 04
subsystem: api
tags: [pdf, legal-compliance, presigned-url, next-js, react]

# Dependency graph
requires:
  - phase: 07-audit-trail-and-download
    provides: Presigned /download?adt=[token] route (07-01, 07-02) serving signed PDFs with 5-min TTL
provides:
  - /file route restricted to original unsigned PDF only (signedFilePath fallback removed)
  - PdfViewer Download anchor hidden when docStatus is 'Signed'
  - LEGAL-03 fully satisfied — sole signed PDF download path is presigned /download?adt=[token]
affects:
  - 07-audit-trail-and-download

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "LEGAL-03 enforcement: /file route hardcoded to filePath (no signedFilePath fallback) — signed PDF only downloadable via presigned token"
    - "Conditional anchor: docStatus !== 'Signed' guard hides toolbar Download link in PdfViewer"

key-files:
  created: []
  modified:
    - teressa-copeland-homes/src/app/api/documents/[id]/file/route.ts
    - teressa-copeland-homes/src/app/portal/(protected)/documents/[docId]/_components/PdfViewer.tsx

key-decisions:
  - "/file route always reads doc.filePath (original) — signedFilePath fallback removed per Option A lock; LEGAL-03 comment added"
  - "PdfViewer Download anchor wrapped in {docStatus !== 'Signed' && ...} — still loads PDF via /file for in-browser display, toolbar download hidden for Signed"

patterns-established:
  - "Enforcement via subtraction: removing the fallback (doc.signedFilePath ?? doc.filePath) is simpler and more secure than adding checks"
  - "Toolbar action gating by docStatus: use conditional rendering rather than disabling to completely eliminate the download path for Signed docs"

requirements-completed: [SIGN-07, LEGAL-03]

# Metrics
duration: 1min
completed: 2026-03-21
---

# Phase 7 Plan 04: LEGAL-03 Gap Closure Summary

**Removed signedFilePath fallback from /file route and conditionally hidden PdfViewer Download anchor for Signed docs, making presigned /download?adt=[token] the sole signed PDF download path**

## Performance

- **Duration:** 1 min
- **Started:** 2026-03-21T16:53:33Z
- **Completed:** 2026-03-21T16:54:50Z
- **Tasks:** 2
- **Files modified:** 2

## Accomplishments
- `/file` route no longer serves signed PDFs — always returns the unsigned original via `doc.filePath`
- PdfViewer toolbar Download anchor is absent when `docStatus === 'Signed'` — no second download path for agents
- LEGAL-03 requirement fully satisfied: presigned `/download?adt=[token]` is the exclusive route for signed PDF downloads
- TypeScript compiles cleanly — `doc.filePath` type matches previous usage, no new errors

## Task Commits

Each task was committed atomically:

1. **Task 1: Restrict /file route to original PDF only** - `6775cc7` (fix)
2. **Task 2: Hide Download anchor in PdfViewer for Signed documents** - `cac5d5b` (fix)

**Plan metadata:** (final commit — see below)

## Files Created/Modified
- `teressa-copeland-homes/src/app/api/documents/[id]/file/route.ts` - Replaced `doc.signedFilePath ?? doc.filePath` with `doc.filePath`; updated comment to reference LEGAL-03
- `teressa-copeland-homes/src/app/portal/(protected)/documents/[docId]/_components/PdfViewer.tsx` - Wrapped Download `<a>` in `{docStatus !== 'Signed' && (...)}` conditional; Document file prop unchanged

## Decisions Made
- Used `doc.filePath` directly with no null coalescence — clean and unambiguous. The previous `??` fallback was the entire gap; removing it closes it in 2 characters.
- Conditional rendering (`{docStatus !== 'Signed' && ...}`) rather than `disabled` on the anchor — a hidden anchor is a cleaner UX signal that no download is available, not just unavailable.

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None. Both changes were minimal and targeted (2-line change in route.ts, wrapping existing anchor in PdfViewer.tsx). TypeScript confirmed clean on first pass.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

LEGAL-03 is fully closed. All 27 plans across all 7 phases are now complete:
- Signed PDF downloads are exclusively available via PreparePanel presigned URL (5-min TTL, purpose:'agent-download' JWT claim)
- `/file` route is safe to use for in-browser PDF viewing without inadvertently serving signed PDFs
- No further Phase 7 work required

---
*Phase: 07-audit-trail-and-download*
*Completed: 2026-03-21*

## Self-Check: PASSED

- route.ts: FOUND
- PdfViewer.tsx: FOUND
- 07-04-SUMMARY.md: FOUND
- Commit 6775cc7: FOUND
- Commit cac5d5b: FOUND
