docs(kiro): archive the superseded roadmap; status notes on specs

A4: roadmap-2026-09-04.md moves to .kiro/archive/steering/ so it no longer
loads as steering (roadmap.md and safety-net.md replaced it); roadmap.md's
pointer follows it. overview.md's spec table is recounted from tasks.md and
spec.json (adds ai-service-plane, harnessx-removal, learned-decision-engine,
pre-push-safety-net; drops the stale "active one"), and the module line now
cites the regenerated audit: 150 modules, 145 load-bearing, 5 standalone,
0 orphaned; 1,964 tests collected.

A5: a dated status note at the top of the requirements (or brief) of 16
specs: retired, superseded, dormant or complete, and for
model-grounded-detection the removal of judge/calibrate/execution (closing
the Req 10 execution-tier option). spec.json phase corrected to
implementation-complete where every task is checked (model-grounded-
detection, propose-adjudicate-prove, tree-sitter-overlay-extra,
corpus-seeded-mechanisms, pair-corpus-honesty); openrouter-sast-harness gets
a spec.json with status retired. Nothing deleted, no spec moved.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo

.kiro/specs/openrouter-sast-harness/requirements.md

@@ -1,5 +1,7 @@
 # Requirements: OpenRouter SAST Harness
 
+> **Status 2026-10-02:** retired (see the note below). Its OpenCode skill `openultrasast-kiro-impl`, which still sent agents to this tasks.md, was deleted. Kept as decision history; nothing in src, tests or CI points here.
+
 > **Retired 2026-09-30:** HarnessX was removed by `harnessx-removal`; the agentic plane is ax
 > (`ai-service-plane`), and evolutionary proposals come from the plane memory. History below is unchanged.
 

.kiro/specs/openrouter-sast-harness/spec.json

@@ -0,0 +1,7 @@
+{
+  "feature_name": "openrouter-sast-harness",
+  "language": "en",
+  "status": "retired",
+  "updated_at": "2026-10-02T00:00:00Z",
+  "retired_note": "2026-09-30: HarnessX was removed by harnessx-removal; this spec had no spec.json before 2026-10-02 and is kept as decision history."
+}