getBranchDiff()

// Compare feature branch to main
const diff = await repo.getBranchDiff({
  branch: "feature/new-auth",
  base: "main", // optional, defaults to default branch
});

console.log(`Changed files: ${diff.stats.files}`);
console.log(`+${diff.stats.additions} -${diff.stats.deletions}`);

// Filter to specific files
const filteredDiff = await repo.getBranchDiff({
  branch: "feature/new-auth",
  paths: ["src/auth.ts", "src/utils/token.ts"],
});