diff --git a/src/inbound.ts b/src/inbound.ts
index d089448..06c1973 100644
--- a/src/inbound.ts
+++ b/src/inbound.ts
@@ -129,7 +129,34 @@ export class FabricInbound {
       return cached.onCall;
     }
     const base = (process.env.HF_API_BASE_URL ?? '').trim() || 'https://monitor.hangman-lab.top';
-    const claw = (process.env.HF_CLAW_IDENTIFIER ?? '').trim() || (await import('os')).hostname();
+    // CLAW_IDENTIFIER resolution priority:
+    //   1. HF_CLAW_IDENTIFIER env (operator override)
+    //   2. openclaw config `plugins.harbor-forge.identifier` (what the HF
+    //      plugin itself uses — keeps the two in sync without an extra
+    //      env per service unit)
+    //   3. os.hostname() last-resort fallback (often wrong: e.g. sim
+    //      container hostname is `server.t2` but HF agent row has
+    //      `claw_identifier=sim-t2`; matching is mandatory for the HF
+    //      backend's _require_agent() check)
+    let claw = (process.env.HF_CLAW_IDENTIFIER ?? '').trim();
+    if (!claw) {
+      try {
+        // openclaw config shape (verified in sim):
+        //   { plugins: { entries: { 'harbor-forge': { config: { identifier } } } } }
+        const cfg = this.cfg as {
+          plugins?: { entries?: Record<string, { config?: { identifier?: string } }> };
+        };
+        const fromCfg = cfg?.plugins?.entries?.['harbor-forge']?.config?.identifier;
+        if (fromCfg && typeof fromCfg === 'string' && fromCfg.trim()) {
+          claw = fromCfg.trim();
+        }
+      } catch {
+        /* fall through to hostname */
+      }
+    }
+    if (!claw) {
+      claw = (await import('os')).hostname();
+    }
     let onCall = false;
     try {
       const url = `${base.replace(/\/$/, '')}/calendar/agent/status?agent_id=${encodeURIComponent(agentId)}`;