Function favoriteAreas

src/context/user-model.ts:43–50

(fileLists: string[][], topK = 3)

/** Directories the user works in most, from the files their episodes touched (2-level). PURE. */
export function favoriteAreas(fileLists: string[][], topK = 3): string[] {
  const freq = new Map<string, number>();
  for (const files of fileLists) for (const f of files) {
    const area = f.split('/').slice(0, 2).join('/');
    if (area) freq.set(area, (freq.get(area) ?? 0) + 1);
  }
  return [...freq.entries()].sort((a, b) => b[1] - a[1] || a[0].localeCompare(b[0])).slice(0, topK).map(([a]) => a);
}

export function buildUserModel(input: { userFacts: string[]; episodes: { prompt: string; files?: string[] }[] }): UserModel {
  const preferences = input.userFacts