diff --git a/docs/architecture/service-filesystem-boundary.json b/docs/architecture/service-filesystem-boundary.json
index 9fdd4ff2..84e348ac 100644
--- a/docs/architecture/service-filesystem-boundary.json
+++ b/docs/architecture/service-filesystem-boundary.json
@@ -1,13 +1,7 @@
 {
   "schemaVersion": 1,
-  "maximumEntries": 53,
+  "maximumEntries": 52,
   "entries": [
-    {
-      "path": "server/src/services/activity-service.ts",
-      "category": "authoritative-persistence",
-      "owner": "#1186",
-      "rationale": "Coordination-state storage migration is tracked in issue #1186."
-    },
     {
       "path": "server/src/services/agent-health-service.ts",
       "category": "authoritative-persistence",
diff --git a/server/src/services/activity-service.ts b/server/src/services/activity-service.ts
index 471895c8..76c78304 100644
--- a/server/src/services/activity-service.ts
+++ b/server/src/services/activity-service.ts
@@ -1,4 +1,3 @@
-import { mkdir } from 'fs/promises';
 import { join } from 'path';
 import { getDataDir } from '../utils/paths.js';
 import type { ActivityRepository } from '../storage/interfaces.js';
@@ -95,11 +94,6 @@ export class ActivityService {
     }
   }
 
-  private async ensureDir() {
-    const dir = getDataDir();
-    await mkdir(dir, { recursive: true });
-  }
-
   /**
    * Load all activities from storage (already sorted newest-first).
    */
@@ -250,7 +244,6 @@ export class ActivityService {
       return;
     }
 
-    await this.ensureDir();
     // Fallback: no-op
   }