Embedded runner: suppress raw API error payloads (#919)

src/agents/pi-embedded-runner/run/payloads.test.ts

@@ -0,0 +1,32 @@
+import type { AssistantMessage } from "@mariozechner/pi-ai";
+import { describe, expect, it } from "vitest";
+import { buildEmbeddedRunPayloads } from "./payloads.js";
+
+describe("buildEmbeddedRunPayloads", () => {
+  it("suppresses raw API error JSON when the assistant errored", () => {
+    const errorJson =
+      '{"type":"error","error":{"details":null,"type":"overloaded_error","message":"Overloaded"},"request_id":"req_011CX7DwS7tSvggaNHmefwWg"}';
+    const lastAssistant = {
+      stopReason: "error",
+      errorMessage: errorJson,
+      content: [{ type: "text", text: errorJson }],
+    } as AssistantMessage;
+
+    const payloads = buildEmbeddedRunPayloads({
+      assistantTexts: [errorJson],
+      toolMetas: [],
+      lastAssistant,
+      sessionKey: "session:telegram",
+      inlineToolResultsAllowed: false,
+      verboseLevel: "off",
+      reasoningLevel: "off",
+    });
+
+    expect(payloads).toHaveLength(1);
+    expect(payloads[0]?.text).toBe(
+      "The AI service is temporarily overloaded. Please try again in a moment.",
+    );
+    expect(payloads[0]?.isError).toBe(true);
+    expect(payloads.some((payload) => payload.text === errorJson)).toBe(false);
+  });
+});