diff --git a/package-lock.json b/package-lock.json
index ef54bd8e..78882785 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25,7 +25,7 @@
         "@xterm/addon-fit": "^0.11.0",
         "@xterm/addon-web-links": "^0.12.0",
         "@xterm/xterm": "^6.0.0",
-        "ai-ration": "github:maonakamoto/ai-ration#v0.2.0",
+        "ai-ration": "github:maonakamoto/ai-ration#v0.2.1",
         "bip-kit": "^0.1.0",
         "bs58check": "^4.0.0",
         "class-variance-authority": "^0.7.1",
@@ -6006,9 +6006,8 @@
       }
     },
     "node_modules/ai-ration": {
-      "version": "0.2.0",
-      "resolved": "git+ssh://git@github.com/maonakamoto/ai-ration.git#14a41b0c3418d53a8163d4837b7df964cc26f6d3",
-      "integrity": "sha512-rLgkxX952XU6EjTWj8RCd04uTy3zuDYUx0H/fT8r11HuisDJfPVXWfAqh5zjdnf8MqQIqd3UqggAiRbktuRW3g==",
+      "version": "0.2.1",
+      "resolved": "git+ssh://git@github.com/maonakamoto/ai-ration.git#07c492ce27785d66d9623acf7b30874fb908da13",
       "license": "MIT",
       "engines": {
         "node": ">=18"
diff --git a/package.json b/package.json
index dbc6c3a6..72945913 100644
--- a/package.json
+++ b/package.json
@@ -111,7 +111,7 @@
     "@xterm/addon-fit": "^0.11.0",
     "@xterm/addon-web-links": "^0.12.0",
     "@xterm/xterm": "^6.0.0",
-    "ai-ration": "github:maonakamoto/ai-ration#v0.2.0",
+    "ai-ration": "github:maonakamoto/ai-ration#v0.2.1",
     "bip-kit": "^0.1.0",
     "bs58check": "^4.0.0",
     "class-variance-authority": "^0.7.1",
diff --git a/scripts/test/agent-name-lookup.ts b/scripts/test/agent-name-lookup.ts
index b93a46ef..f8a881ce 100644
--- a/scripts/test/agent-name-lookup.ts
+++ b/scripts/test/agent-name-lookup.ts
@@ -107,9 +107,19 @@ function candidates(message: string): string[] {
   // moment the chain moved into `ai-ration` — the property held perfectly and
   // the test failed anyway, because it was reading a source file rather than
   // the thing the source file produces.
+  // …and asserted as a SET rather than one id. The previous anchor was
+  // `llama-3.1-8b-instant` alone, which the vendor retired on 2026-08-18 —
+  // so the guard failed not because the property broke but because its single
+  // example rotted. Anchoring a rot-detector to one pinned id reproduces the
+  // exact failure it is watching for. Any probed model satisfies it.
+  //
+  // Membership here means: called with a real tool definition and observed to
+  // emit a parseable tool call. gpt-oss-120b / gpt-oss-20b probed 2026-08-25
+  // (native tool_call, correct arguments). Do not add a model you have not run.
+  const LOOP_VERIFIED = ["openai/gpt-oss-120b", "openai/gpt-oss-20b"];
   const models = CHAT_CHAIN.flatMap((p) => p.models);
   assert.ok(
-    models.includes("llama-3.1-8b-instant"),
+    models.some((m) => LOOP_VERIFIED.includes(m)),
     `the chain must keep a model verified to drive the loop, got: ${models.join(", ")}`,
   );
 }