diff --git a/docs/work/_system/_state.json b/docs/work/_system/_state.json
index 1778477..5823383 100644
--- a/docs/work/_system/_state.json
+++ b/docs/work/_system/_state.json
@@ -1,5 +1,5 @@
 {
-  "updated_at": "2026-05-18T15:56:54.448Z",
+  "updated_at": "2026-05-18T16:03:09.410Z",
   "epics": {
     "binder-wrap-helper": {
       "status": "done",
@@ -335,10 +335,10 @@
           ]
         },
         "09-documentation": {
-          "status": "todo",
+          "status": "in-progress",
           "title": "Documentation — analytics.md, conformance-quickref, CLAUDE.md, template-tiers",
           "ac_total": 2,
-          "ac_completed": 0,
+          "ac_completed": 1,
           "depends_on": [],
           "blocks": []
         }
diff --git a/docs/work/epics/product-analytics-channel/09-documentation/_story.md b/docs/work/epics/product-analytics-channel/09-documentation/_story.md
index 4a86841..5fa05aa 100644
--- a/docs/work/epics/product-analytics-channel/09-documentation/_story.md
+++ b/docs/work/epics/product-analytics-channel/09-documentation/_story.md
@@ -3,7 +3,7 @@ id: 09-documentation
 epic: product-analytics-channel
 title: Documentation — analytics.md, conformance-quickref, CLAUDE.md, template-tiers
 type: technical-story
-status: todo
+status: in-progress
 feature: docs
 depends-on:
   [
@@ -13,7 +13,7 @@ depends-on:
   ]
 blocks: []
 created: 2026-05-18T12:08:00Z
-updated: 2026-05-18T10:46:27.080Z
+updated: 2026-05-18T16:03:09.248Z
 ---
 
 ## Goal
@@ -47,5 +47,5 @@ Docs land last (per PRD sequencing) so they can reference the real API rather th
 
 ## Tasks
 
-- [ ] Write `docs/guides/analytics.md` covering server-side wiring (`BindContext.analytics`), client-side wiring (`<AnalyticsProvider>` + `useAnalytics()`), vendor evaluation step (ADR-022), and PII boundary note — all gates pass on this commit.
+- [x] Write `docs/guides/analytics.md` covering server-side wiring (`BindContext.analytics`), client-side wiring (`<AnalyticsProvider>` + `useAnalytics()`), vendor evaluation step (ADR-022), and PII boundary note — all gates pass on this commit.
 - [ ] Update `docs/guides/conformance-quickref.md` (seventh rule + analytics-event drift pattern), `CLAUDE.md` (6 → 7 conformance ESLint rules), and `docs/architecture/template-tiers.md` (add `core-analytics` to optional-cores list) — all gates pass on this commit.