Day 5: Spec-Driven Production Development in the Age of Vibe Coding

Vibe coding got you here fast, natural language as your interface, an agent doing real work by Day 2. Production doesn't get to stay that loose. Today is about graduating the agent you've built from something that runs when you personally start it, to a governed, observable system other people can depend on: a contract-first design so the pieces stop silently drifting apart, a deployment that survives a crash without you watching it, a real way for users to reach it, and observability so you hear about a failure from a dashboard instead of a support ticket.

What you'll cover

• Spec-Driven Design , API contracts and interface definitions that keep an agent's tools honest as the system grows.
• Deploying Your Agent , running the process reliably, keeping secrets out of your code, and knowing what "up" actually means.
• Exposing Agents to Users , giving an agent a real presence in Slack or Telegram.
• Streaming Agent UIs , showing a user what the agent is doing, live, instead of a spinner.
• Observability , tracing, logging, and automated evals so you catch a regression before a user does.

Then: put all five days together in the Capstone: The Foreman.