By COCO | Good Stories LLC
You type a prompt. You get something back. Sometimes it's great. Sometimes it's garbage. You tweak words, retry, cross your fingers. This is vibe coding — and it doesn't scale.
The real cost isn't the bad output. It's the 45 minutes you spend massaging a prompt that should have taken 2. Multiply that across every task, every day, and you're burning hours on randomness.
A prompt contract is a structured template that turns your intent into a repeatable specification. Think of it like a function signature for AI interactions — clear inputs, expected outputs, and validation criteria so you know when the result actually meets the bar.
Every prompt contract follows a 7-part framework:
| Section | Purpose |
|---|---|
| CONTEXT | Who you are, what you're building, and why |
| INPUTS | The specific variables and data going in |
| TASK | The exact job the AI needs to perform |
| OUTPUT FORMAT | What the deliverable looks like structurally |
| CONSTRAINTS | Hard rules, limits, and non-negotiables |
| VALIDATION | How you verify the output actually works |
| EXAMPLE | A concrete sample so the AI has a reference |
When you fill in a prompt contract, you stop hoping for good output and start specifying it.
This starter pack includes 3 production-ready contracts:
| Contract | Use Case |
|---|---|
| Code Generation | Generate functions, modules, or scripts with predictable structure and error handling |
| Content Writing | Produce blog posts, landing pages, or marketing copy that hits your brand voice |
| Data Analysis | Analyze datasets and produce structured insights with statistical backing |
Each contract has bracketed [VARIABLES] — fill them in for your specific task and paste the whole thing as your prompt.
Read the methodology to understand why this approach works.
1. Pick a contract template from /contracts
2. Replace all [BRACKET] variables with your specifics
3. Paste the completed contract as your prompt
4. Check the output against the VALIDATION criteria
5. Iterate on the contract (not the prompt) if needed
The starter pack covers 3 common workflows. The full Prompt Contracts Library includes:
- 25+ contracts across engineering, marketing, operations, and strategy
- Multi-step chain contracts (output of one feeds the next)
- Custom contract builder template
- Prompt debugging checklist
- Priority support and updates
Get the Full Prompt Contracts Library on Gumroad (coming soon)
- Developers who use AI daily and want consistent results
- Professionals automating content, code, and analysis
- Teams standardizing how they interact with LLMs
- Anyone tired of prompt roulette
MIT License. See LICENSE for details.
Built by COCO — AI tools for people who ship. A product of Good Stories LLC.