fix(runtime): run pi tools sequentially

src/main/worker/runtime/pi-agent-factory.ts

@@ -87,5 +87,6 @@ export function createPiAgent(input: PiAgentFactoryInput): Agent {
     beforeToolCall: hooks.beforeToolCall,
     afterToolCall: hooks.afterToolCall,
     transformContext: hooks.transformContext,
+    toolExecution: "sequential",
   });
 }

tests/unit/pi-agent-factory.test.ts

@@ -0,0 +1,42 @@
+import type { Model } from "@mariozechner/pi-ai";
+import { describe, expect, it } from "vitest";
+import { createPiAgent } from "../../src/main/worker/runtime/pi-agent-factory";
+import type { WorkerRpcClient } from "../../src/main/worker/entry/rpc";
+
+function createModel(): Model<"openai-responses"> {
+  return {
+    id: "mock",
+    name: "mock",
+    api: "openai-responses",
+    provider: "openai",
+    baseUrl: "https://example.invalid",
+    reasoning: false,
+    input: ["text"],
+    cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
+    contextWindow: 8192,
+    maxTokens: 2048,
+  };
+}
+
+describe("pi agent factory", () => {
+  it("uses sequential tool execution for coding tools", () => {
+    const agent = createPiAgent({
+      runId: "run_1",
+      taskSessionId: "session_1",
+      systemPrompt: "You are an engineer.",
+      model: createModel(),
+      tools: [] as never,
+      priorMessages: [],
+      thinkingLevel: "off",
+      apiKey: "test-key",
+      extraHeaders: undefined,
+      rpc: {
+        invoke: async () => {
+          throw new Error("Unexpected RPC call in factory test.");
+        },
+      } as unknown as WorkerRpcClient,
+    });
+
+    expect(agent.toolExecution).toBe("sequential");
+  });
+});