docs(06-03): complete SARIF 2.1.0 formatter plan

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: executing
-stopped_at: Completed 06-01-PLAN.md
-last_updated: "2026-04-05T20:29:09.502Z"
+stopped_at: Completed 06-03-PLAN.md
+last_updated: "2026-04-05T20:32:29.678Z"
 last_activity: 2026-04-05
 progress:
   total_phases: 18
   completed_phases: 5
   total_plans: 34
-  completed_plans: 29
+  completed_plans: 31
   percent: 20
 ---
 
@@ -75,6 +75,7 @@ Progress: [██░░░░░░░░] 20%
 | Phase 05-verification-engine P03 | 245s | 2 tasks | 4 files |
 | Phase 05 P05 | 12min | 2 tasks | 5 files |
 | Phase 06 P01 | 8m | 2 tasks | 7 files |
+| Phase 06 P03 | ~6m | 1 tasks | 2 files |
 
 ## Accumulated Context
 
@@ -104,6 +105,7 @@ Recent decisions affecting current work:
 - [Phase 05-verification-engine]: Plan 05-03: HTTPVerifier classifies via YAML VerifySpec only; no per-provider branches. VerifyAll uses ants pool with per-finding Result guarantee.
 - [Phase 05]: Verification runs in batch mode after scan completes (collect -> verify -> persist) with Result->Finding back-assignment via provider+masked-key tuple
 - [Phase 06]: Registry pattern for output formatters; TableFormatter strips ANSI when writer is not a TTY via zero-value lipgloss.Style
+- [Phase 06]: SARIF 2.1.0 via hand-rolled structs (no library) per CLAUDE.md
 
 ### Pending Todos
 
@@ -118,6 +120,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-04-05T20:29:05.176Z
-Stopped at: Completed 06-01-PLAN.md
+Last session: 2026-04-05T20:32:29.674Z
+Stopped at: Completed 06-03-PLAN.md
 Resume file: None