diff --git a/src/agents/pi-embedded-runner/run/attempt.tool-call-argument-repair.test.ts b/src/agents/pi-embedded-runner/run/attempt.tool-call-argument-repair.test.ts
index 3edffebf62e..5392c90d7d3 100644
--- a/src/agents/pi-embedded-runner/run/attempt.tool-call-argument-repair.test.ts
+++ b/src/agents/pi-embedded-runner/run/attempt.tool-call-argument-repair.test.ts
@@ -28,4 +28,13 @@ describe("shouldRepairMalformedToolCallArguments", () => {
       }),
     ).toBe(false);
   });
+
+  it("keeps kimi providers off on non-anthropic non-openai-completions transports", () => {
+    expect(
+      shouldRepairMalformedToolCallArguments({
+        provider: "kimi-coding",
+        modelApi: "openai-responses",
+      }),
+    ).toBe(false);
+  });
 });
diff --git a/src/agents/pi-embedded-runner/run/attempt.tool-call-argument-repair.ts b/src/agents/pi-embedded-runner/run/attempt.tool-call-argument-repair.ts
index ba2bd59a4c5..8f9264e6557 100644
--- a/src/agents/pi-embedded-runner/run/attempt.tool-call-argument-repair.ts
+++ b/src/agents/pi-embedded-runner/run/attempt.tool-call-argument-repair.ts
@@ -299,7 +299,8 @@ export function shouldRepairMalformedToolCallArguments(params: {
   modelApi?: string | null;
 }): boolean {
   return (
-    normalizeProviderId(params.provider ?? "") === "kimi" ||
+    (normalizeProviderId(params.provider ?? "") === "kimi" &&
+      params.modelApi === "anthropic-messages") ||
     params.modelApi === "openai-completions"
   );
 }