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/bedrock-cache-write-1h-cost.test.ts

@@ -0,0 +1,77 @@
+import { describe, expect, it, vi } from "vitest";
+
+vi.mock("@aws-sdk/client-bedrock-runtime", () => {
+	class BedrockRuntimeServiceException extends Error {}
+
+	class BedrockRuntimeClient {
+		middlewareStack = { add: () => undefined };
+
+		async send(): Promise<unknown> {
+			return {
+				$metadata: { httpStatusCode: 200 },
+				stream: (async function* () {
+					yield { messageStart: { role: "assistant" } };
+					yield {
+						metadata: {
+							usage: {
+								inputTokens: 100,
+								outputTokens: 5,
+								totalTokens: 1_000_105,
+								cacheWriteInputTokens: 1_000_000,
+								cacheDetails: [
+									{ ttl: "1h", inputTokens: 150_000 },
+									{ ttl: "5m", inputTokens: 600_000 },
+									{ ttl: "1h", inputTokens: 250_000 },
+								],
+							},
+						},
+					};
+					yield { messageStop: { stopReason: "end_turn" } };
+				})(),
+			};
+		}
+	}
+
+	class ConverseStreamCommand {
+		readonly input: unknown;
+		constructor(input: unknown) {
+			this.input = input;
+		}
+	}
+
+	return {
+		BedrockRuntimeClient,
+		BedrockRuntimeServiceException,
+		ConverseStreamCommand,
+		StopReason: {
+			END_TURN: "end_turn",
+			STOP_SEQUENCE: "stop_sequence",
+			MAX_TOKENS: "max_tokens",
+			MODEL_CONTEXT_WINDOW_EXCEEDED: "model_context_window_exceeded",
+			TOOL_USE: "tool_use",
+		},
+		CachePointType: { DEFAULT: "default" },
+		CacheTTL: { FIVE_MINUTES: "5m", ONE_HOUR: "1h" },
+		ConversationRole: { ASSISTANT: "assistant", USER: "user" },
+		ImageFormat: { JPEG: "jpeg", PNG: "png", GIF: "gif", WEBP: "webp" },
+		ToolResultStatus: { ERROR: "error", SUCCESS: "success" },
+	};
+});
+
+import { stream as streamBedrock } from "../src/api/bedrock-converse-stream.ts";
+import { getModel, normalizeContext } from "../src/compat.ts";
+
+const model = getModel("amazon-bedrock", "us.anthropic.claude-opus-4-8");
+const context = normalizeContext({ messages: [{ role: "user", content: "hi", timestamp: Date.now() }] });
+
+describe("Bedrock 1h cache write cost", () => {
+	it("prices the 1h cache details at 2x while preserving the total cache write", async () => {
+		// Regression test for https://github.com/earendil-works/pi/issues/9457
+		const result = await streamBedrock(model, context, { cacheRetention: "none" }).result();
+
+		expect(result.usage.cacheWrite).toBe(1_000_000);
+		expect(result.usage.cacheWrite1h).toBe(400_000);
+		const expectedCacheWriteCost = (600_000 * model.cost.cacheWrite + 400_000 * model.cost.input * 2) / 1_000_000;
+		expect(result.usage.cost.cacheWrite).toBeCloseTo(expectedCacheWriteCost, 10);
+	});
+});