docs(07-01): complete agent download token and route plan

- 07-01-SUMMARY.md: execution summary with decisions and file references
- STATE.md: position updated to Phase 7 Plan 1 complete; two decisions logged
- ROADMAP.md: Phase 7 progress updated (1/3 plans complete)
- REQUIREMENTS.md: SIGN-07 and LEGAL-03 marked complete

.planning/STATE.md

@@ -3,12 +3,12 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: unknown
-last_updated: "2026-03-21T15:43:33.117Z"
+last_updated: "2026-03-21T16:35:45.167Z"
 progress:
-  total_phases: 6
+  total_phases: 7
   completed_phases: 6
-  total_plans: 24
-  completed_plans: 24
+  total_plans: 27
+  completed_plans: 25
 ---
 
 # Project State
@@ -18,16 +18,16 @@ progress:
 See: .planning/PROJECT.md (updated 2026-03-19)
 
 **Core value:** Teressa can prepare and send any real estate form to a client for signing in minutes, from her browser, without leaving her site.
-**Current focus:** Phase 6 - Signing Flow
+**Current focus:** Phase 7 - Audit Trail and Download
 
 ## Current Position
 
-Phase: 6 of 7 (Signing Flow) — Plan 6 complete (PHASE COMPLETE)
-Plan: 06-06 (6 of 6 plans) — DNS email authentication (SPF/DKIM/DMARC) verified for tcopelandhomes.com via Resend — LEGAL-04 satisfied
-Status: All three MXToolbox checks (SPF, DKIM, DMARC) verified green/pass for tcopelandhomes.com. Resend configured as SMTP provider with DKIM at resend._domainkey.tcopelandhomes.com. Signing emails may now be sent to real clients.
-Last activity: 2026-03-21 — Phase 6 Plan 06: DNS verification checkpoint — LEGAL-04 compliance gate satisfied
+Phase: 7 of 7 (Audit Trail and Download) — Plan 1 complete (1 of 3)
+Plan: 07-01 (1 of 3 plans) — Agent download token (createAgentDownloadToken/verifyAgentDownloadToken) and GET /api/documents/[id]/download route — SIGN-07 and LEGAL-03 satisfied
+Status: token.ts extended with agent-download JWT (5-min TTL); download route streams signed PDFs with path traversal guard and document ID cross-check; tsc and build pass
+Last activity: 2026-03-21 — Phase 7 Plan 01: agent-download JWT utilities and authenticated download API route complete
 
-Progress: [██████████] 100% (Phase 6 complete)
+Progress: [█░░░░░░░░░] 33% (Phase 7 plan 1 of 3 complete)
 
 ## Performance Metrics
 
@@ -64,6 +64,7 @@ Progress: [██████████] 100% (Phase 6 complete)
 | Phase 06-signing-flow P04 | 7 | 2 tasks | 4 files |
 | Phase 06-signing-flow P05 | 3 | 2 tasks | 4 files |
 | Phase 06-signing-flow P06 | 2 | 2 tasks | 2 files |
+| Phase 07-audit-trail-and-download P01 | 2 | 2 tasks | 2 files |
 
 ## Accumulated Context
 
@@ -138,6 +139,8 @@ Recent decisions affecting current work:
 - [Phase 06-signing-flow 06-05]: Download token uses purpose:'download' claim with same SIGNING_JWT_SECRET — no DB record needed for 15-min ephemeral download authorization
 - [Phase 06-signing-flow 06-05]: Buffer cast to Uint8Array for Response constructor BodyInit compatibility in Next.js 16 TypeScript strict mode
 - [Phase 06-signing-flow 06-05]: router.push replaces window.location.href for confirmed page navigation — SPA navigation consistent with Next.js App Router patterns
+- [Phase 07-audit-trail-and-download]: Agent download token uses same SIGNING_JWT_SECRET with purpose:'agent-download' claim; 5-min TTL; no DB record needed for ephemeral presigned download authorization
+- [Phase 07-audit-trail-and-download]: Token documentId vs route [id] cross-check added as defense-in-depth: valid token for doc A cannot download doc B (403)
 
 ### Pending Todos
 
@@ -154,5 +157,5 @@ None yet.
 ## Session Continuity
 
 Last session: 2026-03-21
-Stopped at: Completed 06-06-PLAN.md — DNS verification checkpoint, LEGAL-04 satisfied, Phase 6 fully complete
+Stopped at: Completed 07-01-PLAN.md — agent download token and route (SIGN-07, LEGAL-03 satisfied)
 Resume file: None