Prepare a feed with your coding agent

import { createHash } from "node:crypto";
import { existsSync, mkdirSync, writeFileSync } from "node:fs";
import { resolve, join } from "node:path";

const target = resolve("provider-start");
const url = process.env.MILLWORK_PROVIDER_START_BUNDLE_URL
  ?? "https://docs.getmillwork.dev/downloads/provider-start.json";
const expected = "0743c23b93413a0c2cd200e0d44412b584819e9db9e11cbb58ae6a410c26b90a";
const sha256 = (bytes) => createHash("sha256").update(bytes).digest("hex");
if (existsSync(target)) throw new Error("Target directory already exists");
const response = await fetch(url, { redirect: "error", signal: AbortSignal.timeout(30000) });
if (!response.ok) throw new Error(`Download failed (HTTP ${response.status})`);
const bytes = Buffer.from(await response.arrayBuffer());
if (bytes.length > 100_000) throw new Error("Kit is too large");
const bundle = JSON.parse(bytes.toString("utf8"));
const names = ["provider-start-brief.txt", "provider-start.mjs"];
if (bundle.format !== "provider-start/v1" || !Array.isArray(bundle.files)
    || bundle.files.length !== names.length) throw new Error("Unexpected kit inventory");
const contents = bundle.files.map((entry, index) => {
  if (entry.path !== names[index] || typeof entry.content !== "string"
      || typeof entry.sha256 !== "string" || !/^[a-f0-9]{64}$/.test(entry.sha256)) {
    throw new Error("Unexpected kit file");
  }
  const data = Buffer.from(entry.content, "utf8");
  if (sha256(data) !== entry.sha256) throw new Error("File checksum mismatch");
  return { ...entry, data };
});
const manifest = contents.map((entry) => `${entry.path}\0${entry.sha256}\n`).join("");
if (sha256(manifest) !== expected || bundle.aggregate_sha256 !== expected) {
  throw new Error("Kit manifest mismatch");
}
mkdirSync(target, { mode: 0o700 });
for (const entry of contents) writeFileSync(join(target, entry.path), entry.data, { flag: "wx", mode: 0o600 });
process.stdout.write("Created provider-start. Read the complete brief and inspect the script.\n");