chore: tidy package manifest and docs (drop .pi artifact in history)

src/.npmignore

@@ -0,0 +1,2 @@
+*.test.ts
+**/*.test.ts

src/package-manifest.test.ts

@@ -1,5 +1,6 @@
 import test from "node:test";
 import assert from "node:assert/strict";
+import { execFileSync } from "node:child_process";
 import { existsSync, readFileSync } from "node:fs";
 import { dirname, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
@@ -7,6 +8,17 @@ import { fileURLToPath } from "node:url";
 const packageRoot = resolve(dirname(fileURLToPath(import.meta.url)), "..");
 const pkg = JSON.parse(readFileSync(resolve(packageRoot, "package.json"), "utf8"));
 
+function getPackedPaths() {
+  const output = execFileSync("npm", ["pack", "--dry-run", "--json"], {
+    cwd: packageRoot,
+    encoding: "utf8",
+    stdio: ["ignore", "pipe", "pipe"],
+    timeout: 30_000,
+  });
+  const [packResult] = JSON.parse(output) as Array<{ files: Array<{ path: string }> }>;
+  return packResult.files.map((file) => file.path);
+}
+
 test("package.json exposes pi-subagents as a standalone pi package", () => {
   assert.equal(pkg.name, "pi-subagents");
   assert.equal(pkg.type, "module");
@@ -31,3 +43,21 @@ test("package.json exposes pi-subagents as a standalone pi package", () => {
   assert.ok(existsSync(resolve(packageRoot, "prompts/implement-and-review.md")));
   assert.ok(existsSync(resolve(packageRoot, "prompts/scout-and-plan.md")));
 });
+
+test("README documents local install, git install, and tmux PATH requirement", () => {
+  const readme = readFileSync(resolve(packageRoot, "README.md"), "utf8");
+  assert.match(readme, /pi install \/absolute\/path\/to\/subagents/);
+  assert.match(readme, /pi install https:\/\/gitea\.rwiesner\.com\/pi\/pi-subagents/);
+  assert.match(readme, /tmux.*PATH/i);
+});
+
+test("npm pack includes runtime package assets", () => {
+  const packedPaths = getPackedPaths();
+
+  assert.ok(packedPaths.includes("index.ts"));
+  assert.ok(packedPaths.includes("prompts/implement.md"));
+  assert.ok(packedPaths.includes("prompts/implement-and-review.md"));
+  assert.ok(packedPaths.includes("prompts/scout-and-plan.md"));
+  assert.ok(packedPaths.includes("src/wrapper/cli.mjs"));
+  assert.deepEqual(packedPaths.filter((p) => p.endsWith(".test.ts")), []);
+});