Can I vibecode Zapier?

Build me a personal workflow automation runner to replace Zapier. Requirements:

- Node.js 22 + TypeScript: a Fastify server and a React front end built with
  Vite, with workflows stored as JSON. `npm start` serves everything on
  http://localhost:5000.
- Storage: better-sqlite3 in ./data/flows.db: workflows (name, enabled, trigger,
  ordered steps), runs (status, timestamps, input), step_runs (input, output,
  error, duration) and a credentials table encrypted with AES-256-GCM using a
  key from .env.
- Triggers: a webhook (POST /hook/<id> with a secret token), a schedule (cron
  expressions via `croner`), and RSS or Atom polling every N minutes with a
  seen-items table so each item fires once.
- Steps: HTTP request (method, headers, JSON body), filter (stop unless a
  condition holds), transform (a JavaScript expression run in a `node:vm`
  context with a 200 ms timeout and no require), send email (nodemailer, SMTP
  from .env), post to Slack or Discord through an incoming-webhook URL, and
  write a row to a SQLite table.
- Data passing: later steps read earlier output with {{steps.<name>.field}},
  resolved by a small path lookup, never by eval.
- Editor: form-based, not a canvas. Pick a trigger, add steps in order, press
  Test to run once with sample data and see each step's input and output.
- Reliability: retry a failing step 3 times with backoff (5 s, 30 s, 5 min),
  record the error, send at most one failure email per workflow per hour, and
  prune runs older than 30 days.
- Single user with one password from .env (signed cookie). No accounts, no
  telemetry; outbound calls go only to URLs you configure.
- Out of scope: OAuth connectors, branching paths, a visual canvas, teams. Use
  API keys or incoming webhooks instead.
- README: how to expose /hook/* through a tunnel or a VPS, and a list of
  services that work with only an API key.

Opens your agent with the prompt filled in, you press enter. Or copy it and paste it into an empty folder.