docs(10-03): complete report-signoff plan and close Phase 10

- Mark Phase 10 complete in ROADMAP.md (3/3 plans, 2026-04-13)
- Create 10-03-report-signoff-SUMMARY.md with attestation-gap closure note
- Update STATE.md: plan 10-03 complete, Phase 10 closed, next is phase 8 or 11
- REQUIREMENTS.md RTVAL-01..05 ticks already landed in 10-02 completion commit (idempotent)

.planning/STATE.md

@@ -2,15 +2,15 @@
 gsd_state_version: 1.0
 milestone: v1.1
 milestone_name: Hardening & Validation
-status: in-progress — plan 10-02 COMPLETE; all four RTVAL runtime checks recorded (RTVAL-01 artifact-backed PASS, RTVAL-02/03/04 attestation-only PASSes — 3 consecutive, audit trail weakened); ready for plan 10-03 (sign-off)
-stopped_at: 10-02 complete — next is 10-03 sign-off and phase closure
+status: in-progress — Phase 10 COMPLETE (signed off 2026-04-13 with explicit attestation-only audit-trail acknowledgement for RTVAL-02/03/04); ready for Phase 8 (Nyquist) or Phase 11 (rollout) planning
+stopped_at: Phase 10 complete — next is /gsd:plan-phase 8 or /gsd:plan-phase 11
 last_updated: "2026-04-13T00:00:00.000Z"
-last_activity: 2026-04-13 — Plan 10-02 completed. RTVAL-04 recorded PASS (attestation-only, 3rd consecutive; user warned twice about weakened audit trail and approved). SUMMARY.md created with prominent attestation-only debt section for wave-3 verifier and phase verifier.
+last_activity: 2026-04-13 — Plan 10-03 completed. RUNTIME-VALIDATION.md signed off by Sébastien QUEROL; REQUIREMENTS.md RTVAL-01..05 ticked; ROADMAP.md Phase 10 marked 3/3 Complete. Phase 10 closed with RTVAL-02/03/04 as accepted attestation-only PASSes.
 progress:
   total_phases: 4
-  completed_phases: 1
+  completed_phases: 2
   total_plans: 4
-  completed_plans: 4
+  completed_plans: 5
 ---
 
 # Project State
@@ -25,11 +25,11 @@ See: .planning/PROJECT.md (updated 2026-04-13 after v1.0 milestone)
 ## Current Position
 
 Milestone: v1.1 Hardening & Validation
-Phase: 10 — Real-World Runtime Validation
-Plan: 02 COMPLETE — all 4 tasks recorded (RTVAL-01 artifact-backed PASS; RTVAL-02/03/04 attestation-only PASSes, 3 consecutive). Next plan: 10-03 (sign-off and phase closure).
-Status: in-progress — plan 10-02 done, plan 10-03 ready to start
-Decision: Plan 10-02 complete with a structurally weakened runtime audit trail. RTVAL-02/03/04 all accepted as attestation-only PASSes per explicit, repeated user approval. User was warned twice (on RTVAL-03 and again on RTVAL-04) that consecutive attestation-only checks damage the audit trail and chose to proceed both times. Plan 10-03 sign-off must explicitly address whether to re-run RTVAL-02/03/04 with full artifact capture before closing the phase.
-Last activity: 2026-04-13 — RTVAL-04 PASS (attestation-only, commit 2c912ca); plan 10-02 SUMMARY.md created with prominent attestation-only debt section; plan 10-02 closed
+Phase: 10 — Real-World Runtime Validation — **COMPLETE (2026-04-13)**
+Plan: 03 COMPLETE — RUNTIME-VALIDATION.md signed off by Sébastien QUEROL; REQUIREMENTS.md RTVAL-01..05 ticked; ROADMAP.md Phase 10 marked 3/3 Complete. Next: Phase 8 (Nyquist) or Phase 11 (rollout).
+Status: phase 10 closed — ready for next phase planning
+Decision: Phase 10 closed with a structurally weakened runtime audit trail. Only RTVAL-01 is artifact-backed; RTVAL-02/03/04 stand on technician attestation. Reviewer explicitly acknowledged the gap at sign-off and accepted closure on that basis. If a regression, incident, or customer escalation touches SYSTEM-context install/detect/uninstall, RTVAL-02/03/04 must be re-run with full artifact capture before the finding can be trusted.
+Last activity: 2026-04-13 — Plan 10-03 completed; Phase 10 closed; commit 5685fd9 (sign-off) plus 10-03 SUMMARY + ROADMAP/STATE update commit
 
 ## Milestone History
 
@@ -74,6 +74,7 @@ Full decision log in PROJECT.md Key Decisions table. Milestone v1.0 decisions ar
 - [Phase 10-real-world-runtime-validation]: 10-02: RTVAL-03 accepted as attestation-only PASS (2026-04-13) — second consecutive attestation-only check; no rtval-03-detection.png and no rtval-03-detect-manual.txt captured; user was explicitly warned that a second consecutive attestation-only check further weakens the audit trail and still chose to proceed; flagged in RUNTIME-VALIDATION.md Notes as soft PASS requiring re-run with full artifact capture before phase sign-off
 - [Phase 10-real-world-runtime-validation]: 10-02: RTVAL-04 accepted as attestation-only PASS (2026-04-13) — **third consecutive attestation-only check**; no rtval-04-uninstall-log.txt and no rtval-04-uninstall-status.png captured; user was warned a SECOND time about cumulative audit trail damage and still chose to proceed. Together, RTVAL-02/03/04 constitute an attestation-only runtime half for Phase 10: only RTVAL-01 (tenant ingestion) is artifact-backed. Plan 10-03 sign-off must explicitly address whether to re-run RTVAL-02/03/04 with full evidence before closing the phase.
 - [Phase 10-real-world-runtime-validation]: 10-02: Plan 10-02 COMPLETE (2026-04-13) — SUMMARY.md created with prominent "Attestation-Only Audit Trail Damage" section for the wave-3 verifier and phase verifier
+- [Phase 10-real-world-runtime-validation]: 10-03: Plan 10-03 COMPLETE (2026-04-13) — RUNTIME-VALIDATION.md signed off by Sébastien QUEROL with explicit attestation-gap acknowledgement; REQUIREMENTS.md RTVAL-01..05 ticked (idempotent, already landed in 10-02 commit 206648c); ROADMAP.md Phase 10 flipped to 3/3 Complete 2026-04-13. Phase 10 officially closed.
 
 ### Active Blockers
 
@@ -88,5 +89,5 @@ None. BLOCKER-01 resolved 2026-04-13 via commits 74535ea (HMAC over IV+ciphertex
 ## Session Continuity
 
 Last session: 2026-04-13T00:00:00.000Z
-Stopped at: Completed 10-02-live-intune-runtime-validation-PLAN.md — next is plan 10-03 (sign-off and phase closure)
-Resume file: .planning/phases/10-real-world-runtime-validation/10-03-*-PLAN.md (to be drafted or existing)
+Stopped at: Completed 10-03-report-signoff-PLAN.md — Phase 10 closed; next is `/gsd:plan-phase 8` (Nyquist) or `/gsd:plan-phase 11` (rollout)
+Resume file: — (awaiting next phase kickoff)