Function detectProjectSignals

src/llm/prompts/stack-profiles.ts:265–283

(cwd: string)

 * failure so the caller can always proceed.
 */
export async function detectProjectSignals(cwd: string): Promise<ProjectSignals> {
  const signals: ProjectSignals = { deps: [], files: [] };
  try {
    const pkgRaw = await fs.readFile(path.join(cwd, 'package.json'), 'utf-8');
    const pkg = JSON.parse(pkgRaw);
    signals.deps = [
      ...Object.keys(pkg.dependencies ?? {}),
      ...Object.keys(pkg.devDependencies ?? {}),
    ];
  } catch { /* no package.json — fine */ }

  try {
    const entries = await fs.readdir(cwd);
    const present = new Set(entries);
    signals.files = PKG_MARKERS.filter(m => present.has(m));
  } catch { /* unreadable cwd — fine */ }

  return signals;
}