chore(vendor): import pi 1.3.0

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/ai/test/openai-completions-reasoning-details.test.ts

@@ -2,6 +2,7 @@ import { Type } from "typebox";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 import { stream as streamOpenAICompletions } from "../src/api/openai-completions.ts";
 import type { AssistantMessage, Model, Tool } from "../src/types.ts";
+import { normalizeContext } from "../src/utils/transcript.ts";
 
 const mockState = vi.hoisted(() => ({
 	chunkSets: [] as unknown[][],
@@ -96,7 +97,9 @@ function toolCallChunk(): unknown {
 }
 
 async function runOpenAICompletionsStream(messages: AssistantMessage[] = []): Promise<AssistantMessage> {
-	return await streamOpenAICompletions(model(), { messages, tools: [readTool] }, { apiKey: "test" }).result();
+	return await streamOpenAICompletions(model(), normalizeContext({ messages, tools: [readTool] }), {
+		apiKey: "test",
+	}).result();
 }
 
 function getAssistantPayload(payload: unknown): { reasoning?: unknown; reasoning_details?: unknown } | undefined {
@@ -249,3 +252,28 @@ describe("openai-completions reasoning_details streaming", () => {
 		expect(getAssistantPayload(mockState.payloads[1])?.reasoning_details).toEqual(expectedReasoningDetails);
 	});
 });
+
+describe("openai-completions reasoning and content in one delta", () => {
+	beforeEach(() => {
+		mockState.chunkSets = [];
+		mockState.payloads = [];
+	});
+
+	// https://github.com/earendil-works/pi/issues/10926
+	it("places thinking before text when one delta carries reasoning_content and content", async () => {
+		mockState.chunkSets = [[chunk({ role: "assistant", reasoning_content: "thinking", content: "answer" }, "stop")]];
+
+		const assistantMessage = await runOpenAICompletionsStream();
+		expect(assistantMessage.content).toEqual([
+			{ type: "thinking", thinking: "thinking", thinkingSignature: "reasoning_content" },
+			{ type: "text", text: "answer" },
+		]);
+	});
+
+	it("places thinking before text when one delta carries reasoning_details and content", async () => {
+		mockState.chunkSets = [[chunk({ reasoning_details: [reasoningDetail], content: "answer" }, "stop")]];
+
+		const assistantMessage = await runOpenAICompletionsStream();
+		expect(assistantMessage.content.map((block) => block.type)).toEqual(["thinking", "text"]);
+	});
+});