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
Define a behavioral contract (inputs, outputs, edge cases) with test cases, and let each language handle types idiomatically. `dict[str, Any]` becomes `Record<string, unknown>` in TS, `map[string]interface{}` in Go, `HashMap<String, Box<dyn Any>>` in Rust. You don't force one type system onto another.
For dynamic languages, type hints document intent but tests enforce the contract. If the function accepts the specified inputs and produces the specified outputs, the contract is satisfied, regardless of whether types are checked at compile time or runtime.
What do you think?