test(cli): pin source build-first launch

apps/cli/tests/source-launch.compat.spec.ts

@@ -1,3 +1,6 @@
+import { chmod, mkdtemp, readFile, rm, writeFile } from 'node:fs/promises'
+import { delimiter, join } from 'node:path'
+import { tmpdir } from 'node:os'
 import { fileURLToPath } from 'node:url'
 import { execa } from 'execa'
 import { describe, expect, it } from 'vitest'
@@ -16,6 +19,34 @@ const repoRoot = fileURLToPath(new URL('../../../', import.meta.url))
 const dshSourceBin = 'apps/cli/src/bin.ts'
 
 describe('dsh SOURCE launcher (node --import tsx/esm)', () => {
+  it('runs the repository build before launching the source CLI', async () => {
+    const stubDir = await mkdtemp(join(tmpdir(), 'dsh-source-launch-'))
+    const invocationLog = join(stubDir, 'pnpm-args.json')
+    const stubBody = "const { appendFileSync } = require('node:fs')\nappendFileSync(process.env.DSH_TEST_PNPM_LOG, JSON.stringify(process.argv.slice(2)))\n"
+    await writeFile(join(stubDir, 'pnpm'), `#!/usr/bin/env node\n${stubBody}`)
+    await chmod(join(stubDir, 'pnpm'), 0o755)
+    await writeFile(join(stubDir, 'pnpm-stub.cjs'), stubBody)
+    await writeFile(join(stubDir, 'pnpm.cmd'), '@echo off\r\nnode "%~dp0pnpm-stub.cjs" %*\r\n')
+
+    const pathKey = Object.keys(process.env).find(key => key.toUpperCase() === 'PATH') ?? 'PATH'
+    try {
+      const result = await execa(process.execPath, ['--import', 'tsx/esm', 'scripts/run-source-dsh.ts', '--help'], {
+        cwd: repoRoot,
+        env: {
+          ...process.env,
+          [pathKey]: `${stubDir}${delimiter}${process.env[pathKey] ?? ''}`,
+          DSH_TEST_PNPM_LOG: invocationLog,
+        },
+        reject: false,
+      })
+      expect(result.exitCode).toBe(0)
+      expect(result.stdout).toMatch(/^Usage: dsh /)
+      await expect(readFile(invocationLog, 'utf8')).resolves.toBe('["run","build"]')
+    } finally {
+      await rm(stubDir, { recursive: true, force: true })
+    }
+  })
+
   it('builds without mixing build logs into CLI stdout', async () => {
     const result = await execa('pnpm', ['dsh', '--help'], {
       cwd: repoRoot,