fix: execute installed CLI entrypoint

src/index.js

@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 import { spawnSync } from 'node:child_process';
-import { pathToFileURL } from 'node:url';
+import { realpathSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
 
 const STATUS_LABELS = {
   A: 'added',
@@ -307,6 +308,16 @@ export function main(argv = process.argv.slice(2), cwd = process.cwd()) {
   return 0;
 }
 
-if (import.meta.url === pathToFileURL(process.argv[1]).href) {
+function isMainModule(moduleUrl, argvPath = process.argv[1]) {
+  if (!argvPath) return false;
+
+  try {
+    return realpathSync(fileURLToPath(moduleUrl)) === realpathSync(argvPath);
+  } catch {
+    return false;
+  }
+}
+
+if (isMainModule(import.meta.url)) {
   process.exitCode = main();
 }

test/cli.test.js

@@ -1,9 +1,10 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { execFileSync, execSync } from 'node:child_process';
-import { mkdtempSync, writeFileSync } from 'node:fs';
+import { mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
+import { pathToFileURL } from 'node:url';
 
 test('atomcommit plan test - CLI should handle --help', () => {
   try {
@@ -27,3 +28,44 @@ test('parseNumstat handles binary markers', async () => {
   const result = parseNumstat('-\t-\tbinary.png\n');
   assert.ok(result.get('binary.png').binary, 'should detect binary files');
 });
+
+test('packed CLI executes through the npm bin symlink and remains import-safe', (t) => {
+  const packageRoot = process.cwd();
+  const parent = mkdtempSync(join(tmpdir(), 'atomcommit-packed-'));
+  const consumer = join(parent, 'consumer');
+  t.after(() => rmSync(parent, { recursive: true, force: true }));
+
+  const tarballName = execFileSync('npm', ['pack', '--silent', '--pack-destination', parent], {
+    cwd: packageRoot,
+    encoding: 'utf8',
+  }).trim();
+
+  mkdirSync(join(consumer, 'src'), { recursive: true });
+  writeFileSync(join(consumer, 'package.json'), '{"private":true}\n');
+  writeFileSync(join(consumer, 'src/app.js'), 'console.log("before");\n');
+  execFileSync('git', ['init', '--initial-branch', 'main'], { cwd: consumer });
+  execFileSync('git', ['config', 'user.email', 'test@example.com'], { cwd: consumer });
+  execFileSync('git', ['config', 'user.name', 'Test User'], { cwd: consumer });
+  execFileSync('git', ['add', 'package.json', 'src/app.js'], { cwd: consumer });
+  execFileSync('git', ['commit', '-m', 'initial'], { cwd: consumer });
+  execFileSync('npm', ['install', '--ignore-scripts', '--no-audit', '--no-fund', '--no-save', join(parent, tarballName)], {
+    cwd: consumer,
+  });
+  writeFileSync(join(consumer, 'src/app.js'), 'console.log("after");\n');
+
+  const binPath = join(consumer, 'node_modules', '.bin', 'atomcommit');
+  const version = execFileSync(binPath, ['--version'], { cwd: consumer, encoding: 'utf8' });
+  const plan = execFileSync(binPath, [], { cwd: consumer, encoding: 'utf8' });
+
+  assert.equal(version.trim(), '0.1.0');
+  assert.match(plan, /^# Atomic Commit Plan/);
+  assert.match(plan, /Files changed: 1/);
+
+  const moduleUrl = pathToFileURL(join(consumer, 'node_modules', 'atomcommit', 'src/index.js')).href;
+  assert.doesNotThrow(() => {
+    execFileSync(process.execPath, ['--input-type=module', '--eval', `import(${JSON.stringify(moduleUrl)})`], {
+      cwd: tmpdir(),
+      stdio: 'pipe',
+    });
+  });
+});