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/publish-model-catalog.test.mjs

@@ -0,0 +1,67 @@
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+import { mkdtempSync, mkdirSync, readFileSync, rmSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { fileURLToPath } from "node:url";
+import test from "node:test";
+
+const root = fileURLToPath(new URL("..", import.meta.url));
+
+function writeJson(path, value) {
+	writeFileSync(path, `${JSON.stringify(value)}\n`);
+}
+
+test("publishes explicit per-type and total model counts", (t) => {
+	const input = mkdtempSync(join(tmpdir(), "pi-model-catalog-counts-"));
+	t.after(() => rmSync(input, { recursive: true, force: true }));
+	const providersDir = join(input, "providers");
+	mkdirSync(providersDir);
+
+	const chatModels = Array.from({ length: 500 }, (_, index) => ({
+		type: "chat",
+		id: `chat-${index}`,
+		provider: "anthropic",
+	}));
+	const allModels = {
+		anthropic: chatModels,
+		openai: [],
+		openrouter: [
+			{ type: "image", id: "shared", provider: "openrouter" },
+			{ type: "classifier", id: "shared", provider: "openrouter" },
+		],
+	};
+	const models = {
+		anthropic: Object.fromEntries(chatModels.map((model) => [model.id, model])),
+		openai: {},
+		openrouter: {},
+	};
+	const providerIds = Object.keys(allModels).sort();
+	writeJson(join(input, "models.json"), models);
+	writeJson(join(input, "models.all.json"), allModels);
+	writeJson(join(input, "providers.json"), providerIds);
+	for (const providerId of providerIds) {
+		writeJson(join(providersDir, `${providerId}.json`), models[providerId]);
+		writeJson(join(providersDir, `${providerId}.all.json`), allModels[providerId]);
+	}
+
+	const result = spawnSync(
+		process.execPath,
+		[
+			"scripts/publish-model-catalog.mjs",
+			"--input",
+			input,
+			"--source-commit",
+			"test-commit",
+			"--dry-run",
+		],
+		{ cwd: root, encoding: "utf8" },
+	);
+	assert.equal(result.status, 0, `${result.stdout}\n${result.stderr}`);
+	const publication = JSON.parse(readFileSync(join(input, "publication.json"), "utf8"));
+	assert.equal(publication.modelCount, 500);
+	assert.equal(publication.chatModelCount, 500);
+	assert.equal(publication.imageModelCount, 1);
+	assert.equal(publication.classifierModelCount, 1);
+	assert.equal(publication.totalModelCount, 502);
+});