CONTRACT-Style Comments is both a methodology and a practical template — it's a standardized approach to writing documentation that makes implicit system assumptions explicit, with ready-to-use structures you can apply immediately to your codebase. Best of all, you don't have to write the documentation or be responsible for its maintenance!
🚀 Introducing the Official Template
This article is in follow‑up to the 5‑part series on What’s On Your Brain
The 5‑part series on CONTRACT‑Style‑Comments (CSC) introduced a structured, AI‑era approach to writing code with explicit preconditions, postconditions, and invariants. Many readers asked for a practical, ready‑to‑use implementation.
Today, that implementation is here.
👉 Official GitHub Repository:
https://github.com/ajaxstardust/contract-style-comments
This repository transforms the CSC theory into a portable, repeatable, AEO‑friendly project template designed for both humans and AI coding agents.
🔍 What Is CONTRACT‑Style‑Comments (CSC)?
CONTRACT‑Style‑Comments is a development pattern that makes the “rules of the system” explicit and machine‑navigable. It gives both humans and AI agents a shared interface for:
- understanding architectural boundaries
- preventing scope drift
- maintaining invariants during refactors
- reducing ambiguous or destructive changes
CSC is language‑agnostic and works in any codebase where clarity and safety matter.
🧱 What’s Inside the CSC Repository
The repository includes the full Agentic Trivium, the core structure that governs how humans and AI collaborate:
1. CONTRACT.md — The Present‑Tense Truth
Defines invariants, guarantees, and boundaries.
If it must not break, it lives here.
2. WHY.md — The Architectural Reasoning
Explains relationships, rationale, and the logic behind the system.
This is where the “why” becomes explicit.
3. QUICKSTART.md — The Navigation Layer
A stateless‑friendly guide for AI agents and humans to safely operate within the project.
Additional artifacts include:
-
FUTURE.md— A clean space for planned changes - PDF versions of all core documents
- A “Use This Template” workflow for instant adoption
This structure makes CSC a drop‑in governance system for any project.
🤖 Why CONTRACT‑Style‑Comments Matter in the AI Era
AI coding agents are powerful — and risky. They can produce correct code that violates architecture, intent, or invariants.
CSC solves this by giving AI agents:
- explicit rules
- explicit boundaries
- explicit ownership
- explicit reasoning
With CONTRACT‑Style‑Comments:
- AI agents stop “confidently guessing”
- humans stop losing invariants during refactors
- onboarding becomes faster
- code review becomes objective
- tests become self‑documenting
- architectural drift becomes visible
CSC is not just documentation — it’s governance.
🧩 The Agentic Trivium (CSC’s Core Pattern)
The repository formalizes the Agentic Trivium, a three‑document system that keeps AI aligned:
- CONTRACT.md — What is true
- WHY.md — Why it is true
- QUICKSTART.md — How to operate safely
This pattern ensures that AI agents update the narrowest owning artifact when they discover missing axioms or implicit rules.
It is the missing interface between humans and AI coding tools.
🛠️ How To Start Using CONTRACT‑Style‑Comments
- Click “Use this template” in the GitHub repo
- Define your invariants in
CONTRACT.md - Add architectural reasoning to
WHY.md - Instruct your AI agent: > “Read the Trivium in order and follow the Governance Ownership policy.”
- Build with clarity, safety, and shared intent
📣 For Readers of the 5‑Part Series
The series introduced the philosophy.
This repository delivers the implementation.
If you’re exploring AI‑assisted development — or you want a safer, more intentional way to collaborate with LLMs — CONTRACT‑Style‑Comments is designed for exactly that.
👉 Explore the repository:
https://github.com/ajaxstardust/contract-style-comments
I’ll continue expanding examples, patterns, and documentation as the community grows. If you adopt CSC in your own projects, I’d love to hear what you discover.
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