feat: add hashline editing and TypeScript LSP

tests/hashline.test.ts

@@ -0,0 +1,30 @@
+import assert from "node:assert/strict";
+import { mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import test from "node:test";
+
+import { deployBundleHashlineConfig } from "../extensions/hashline-config.ts";
+
+const EXPECTED_CONFIG = {
+	hashLength: 2,
+	grep: false,
+	replaceText: false,
+};
+
+test("hashline config deployment enforces bundle defaults", async () => {
+	const agentDir = await mkdtemp(join(tmpdir(), "my-pi-hashline-"));
+	const targetPath = join(agentDir, "hashline.json");
+
+	try {
+		await writeFile(targetPath, '{"grep":true}\n', "utf8");
+		deployBundleHashlineConfig(agentDir);
+		assert.deepEqual(JSON.parse(await readFile(targetPath, "utf8")), EXPECTED_CONFIG);
+
+		const first = await readFile(targetPath, "utf8");
+		deployBundleHashlineConfig(agentDir);
+		assert.equal(await readFile(targetPath, "utf8"), first);
+	} finally {
+		await rm(agentDir, { recursive: true, force: true });
+	}
+});