diff --git a/docs/work/_system/_state.json b/docs/work/_system/_state.json
index 786a592..4fbb196 100644
--- a/docs/work/_system/_state.json
+++ b/docs/work/_system/_state.json
@@ -1,5 +1,5 @@
 {
-  "updated_at": "2026-05-20T11:33:08.030Z",
+  "updated_at": "2026-05-20T11:41:53.388Z",
   "epics": {
     "binder-wrap-helper": {
       "status": "done",
@@ -675,10 +675,10 @@
           "blocks": []
         },
         "11-documentation": {
-          "status": "todo",
+          "status": "in-progress",
           "title": "Documentation and conformance reference updates",
           "ac_total": 2,
-          "ac_completed": 0,
+          "ac_completed": 1,
           "depends_on": [],
           "blocks": []
         }
diff --git a/docs/work/epics/security-headers-rate-limit-sbom/11-documentation/_story.md b/docs/work/epics/security-headers-rate-limit-sbom/11-documentation/_story.md
index 1ec0293..3d6fb19 100644
--- a/docs/work/epics/security-headers-rate-limit-sbom/11-documentation/_story.md
+++ b/docs/work/epics/security-headers-rate-limit-sbom/11-documentation/_story.md
@@ -3,7 +3,7 @@ id: 11-documentation
 epic: security-headers-rate-limit-sbom
 title: Documentation and conformance reference updates
 type: technical-story
-status: todo
+status: in-progress
 feature: core-shared
 depends-on:
   [
@@ -14,7 +14,7 @@ depends-on:
   ]
 blocks: []
 created: 2026-05-20T00:00:00Z
-updated: 2026-05-20T08:14:55.907Z
+updated: 2026-05-20T11:41:53.228Z
 ---
 
 ## Goal
@@ -50,5 +50,5 @@ Implementations are complete after Story 10, but the institutional knowledge of
 
 ## Tasks
 
-- [ ] Write `docs/guides/security-headers.md` (per-framework wiring, nonce threading for consumer inline scripts, CSP allowlist customization, Sentry nonce integration, securityheaders.com verification) and `docs/guides/rate-limiting.md` (manifest field, key-naming convention `<feature>:<scope>:<key>`, multi-budget patterns, dev/staging/prod backend wiring); all gates pass.
+- [x] Write `docs/guides/security-headers.md` (per-framework wiring, nonce threading for consumer inline scripts, CSP allowlist customization, Sentry nonce integration, securityheaders.com verification) and `docs/guides/rate-limiting.md` (manifest field, key-naming convention `<feature>:<scope>:<key>`, multi-budget patterns, dev/staging/prod backend wiring); all gates pass.
 - [ ] Add entries for `IRateLimit`, `RateLimited` brand, `withRateLimit`, `SecurityHeadersConfig`, `buildSecurityHeaders`, `SBOM`, `nonce` (CSP context) to `docs/glossary.md`; update `CLAUDE.md` conformance rule count 12 → 13 and add `rateLimit?: RateLimitBudget[]` to the manifest field documentation; add `no-undeclared-rate-limit` as the 13th rule in `docs/guides/conformance-quickref.md`; all gates pass.