refactor(core): extract shared dedup helpers

src/agents/pi-embedded-runner/sanitize-session-history.tool-result-details.test.ts

@@ -1,35 +1,21 @@
 import type { AgentMessage } from "@mariozechner/pi-agent-core";
-import type { AssistantMessage, ToolResultMessage, UserMessage } from "@mariozechner/pi-ai";
+import type { ToolResultMessage, UserMessage } from "@mariozechner/pi-ai";
 import { SessionManager } from "@mariozechner/pi-coding-agent";
 import { describe, expect, it } from "vitest";
+import { makeAgentAssistantMessage } from "../test-helpers/agent-message-fixtures.js";
 import { sanitizeSessionHistory } from "./google.js";
 
-function makeAssistantToolCall(timestamp: number): AssistantMessage {
-  return {
-    role: "assistant",
-    content: [{ type: "toolCall", id: "call_1", name: "web_fetch", arguments: { url: "x" } }],
-    api: "openai-responses",
-    provider: "openai",
-    model: "gpt-5.2",
-    usage: {
-      input: 0,
-      output: 0,
-      cacheRead: 0,
-      cacheWrite: 0,
-      totalTokens: 0,
-      cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
-    },
-    stopReason: "toolUse",
-    timestamp,
-  };
-}
-
 describe("sanitizeSessionHistory toolResult details stripping", () => {
   it("strips toolResult.details so untrusted payloads are not fed back to the model", async () => {
     const sm = SessionManager.inMemory();
 
     const messages: AgentMessage[] = [
-      makeAssistantToolCall(1),
+      makeAgentAssistantMessage({
+        content: [{ type: "toolCall", id: "call_1", name: "web_fetch", arguments: { url: "x" } }],
+        model: "gpt-5.2",
+        stopReason: "toolUse",
+        timestamp: 1,
+      }),
       {
         role: "toolResult",
         toolCallId: "call_1",

src/agents/pi-embedded-runner/tool-result-truncation.test.ts

@@ -1,6 +1,7 @@
 import type { AgentMessage } from "@mariozechner/pi-agent-core";
 import type { AssistantMessage, ToolResultMessage, UserMessage } from "@mariozechner/pi-ai";
 import { describe, expect, it } from "vitest";
+import { makeAgentAssistantMessage } from "../test-helpers/agent-message-fixtures.js";
 import {
   truncateToolResultText,
   truncateToolResultMessage,
@@ -35,23 +36,12 @@ function makeUserMessage(text: string): UserMessage {
 }
 
 function makeAssistantMessage(text: string): AssistantMessage {
-  return {
-    role: "assistant",
+  return makeAgentAssistantMessage({
     content: [{ type: "text", text }],
-    api: "openai-responses",
-    provider: "openai",
     model: "gpt-5.2",
-    usage: {
-      input: 0,
-      output: 0,
-      cacheRead: 0,
-      cacheWrite: 0,
-      totalTokens: 0,
-      cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
-    },
     stopReason: "stop",
     timestamp: nextTimestamp(),
-  };
+  });
 }
 
 describe("truncateToolResultText", () => {