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/scripts/browser-smoke-entry.ts

@@ -1,23 +1,7 @@
-import { Client } from "@earendil-works/pi-client";
+import { createHost, memoryLinkPair, replicatedState } from "@earendil-works/chord";
 import { createAssistantMessageEventStream, Type } from "@earendil-works/pi-ai";
 import { complete, getModel, getProviders, streamSimple } from "@earendil-works/pi-ai/compat";
-import {
-	Agent,
-	bashExecutionToText,
-	convertToLlm,
-	createCustomMessage,
-	FileError,
-	formatPromptTemplateInvocation,
-	formatSkillInvocation,
-	formatSkillsForSystemPrompt,
-	getOrThrow,
-	ok,
-	parseCommandArgs,
-	streamProxy,
-	toError,
-	truncateHead,
-} from "@earendil-works/pi-agent-core";
-import { decodeCbor, encodeCbor, PROTOCOL_VERSION } from "@earendil-works/pi-protocol";
+import { Agent, streamProxy } from "@earendil-works/pi-agent-core";
 
 // Keep this entry browser-safe. It is bundled by scripts/check-browser-smoke.mjs
 // to catch accidental Node-only runtime imports in browser-facing package exports.
@@ -27,10 +11,6 @@ const stream = createAssistantMessageEventStream();
 
 const agent = new Agent({ initialState: { model }, streamFn: streamSimple });
 agent.steer({ role: "user", content: [{ type: "text", text: "queued" }], timestamp: 0 });
-const result = getOrThrow(ok({ value: 1 }));
-const customMessage = createCustomMessage("note", "hello", true, undefined, "2026-01-01T00:00:00.000Z");
-const llmMessages = convertToLlm([customMessage]);
-const skill = { name: "browser-safe", description: "Smoke test", content: "Use browser APIs.", filePath: "/skills/browser-safe/SKILL.md" };
 
 console.log(
 	model.id,
@@ -39,25 +19,8 @@ console.log(
 	schema.type,
 	typeof stream.push,
 	agent.hasQueuedMessages(),
-	result.value,
-	llmMessages.length,
-	bashExecutionToText({
-		role: "bashExecution",
-		command: "echo ok",
-		output: "ok",
-		exitCode: 0,
-		cancelled: false,
-		truncated: false,
-		timestamp: 0,
-	}),
-	formatSkillsForSystemPrompt([skill]).length,
-	formatSkillInvocation(skill).length,
-	formatPromptTemplateInvocation({ name: "example", content: "$1 $@" }, parseCommandArgs('one "two three"')),
-	truncateHead("a\nb", { maxLines: 1 }).content,
-	new FileError("not_found", "missing").code,
-	toError("boom").message,
 	typeof streamProxy,
-	typeof Client,
-	PROTOCOL_VERSION,
-	decodeCbor(encodeCbor({ browser: true })),
+	typeof createHost,
+	typeof memoryLinkPair,
+	replicatedState({ browser: true }).value.browser,
 );