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A specification pattern for consistent AI code generation.

61 starsPython

Rune | A spec pattern for consistent AI code generation

by vict00r99·Feb 14, 2026·1 point·3 comments

AI Analysis

●●SolidNiche GemBig Brain
The Take

Turns fuzzy AI prompts into a lightweight contract: SIGNATURE, BEHAVIOR (WHEN/THEN) and TESTS can be written as .rune YAML or embedded Markdown, letting any model or language generate the same behavior. Clever, low-friction idea with practical utilities (drift detection, reverse-engineer skills), but it’s a pattern rather than a product — adoption will hinge on tooling and CI integrations to make these specs enforceable at scale.

Target Audience

Developers, engineering teams, and prompt/AI-tooling engineers who use AI-assisted code generation

Post Description

AI coding tools generate different code every time for the same requirement. RUNE is a specification pattern that fixes this: define a function's signature, WHEN/THEN behavior rules, and test cases upfront. Give the same spec to any AI tool — the generated code has the same behavior.

It's a pattern, not a framework. Works as YAML files or Markdown sections. Any language, any AI tool, no installation.

Includes 7 skills (markdown files you load into your AI tool) for the lifecycle: create specs, validate, refine, generate tests, detect drift, reverse-engineer from code, multi-language generation.

This is the GitHub project: https://github.com/vict00r99/Rune-stone

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