# LM15

> LM15 is a family of model API clients built around a shared request, response, and streaming contract. Applications keep control of tool execution, retries, and conversation history.

The contract defines shared behavior; the SDKs implement it using each language’s conventions. Support depends on the SDK version, provider endpoint, and model. A shared field does not guarantee universal support.

## Getting started

- [Overview](https://lm15.dev/docs/): The contract, request fields, and capabilities.
- [First request](https://lm15.dev/docs/first-request/): Setup links and a selectable code example.
- [LM15 skill](https://lm15.dev/skill.md): Instructions for coding agents using LM15.
- [Playground](https://lm15.dev/playground/): Try provider calls in the browser and copy code. Calls require credentials and may cost money.

## Authoritative sources

- [Contract](https://github.com/lm15-dev/lm15-contract): Types, field rules, provider mappings, and shared test cases.
- [Source precedence](https://github.com/lm15-dev/lm15-contract/blob/main/AUTHORITY.md): Which source wins when documentation, tests, and implementations disagree.
- [Scope and stability](https://github.com/lm15-dev/lm15-contract/blob/main/spec/SCOPE.md): Frozen and provisional features.
- [API conventions](https://github.com/lm15-dev/lm15-contract/blob/main/playbooks/api-family.md): Shared names and language-specific usage.

## Implementations

- [Python](https://github.com/lm15-dev/lm15-python): Reference implementation, not the authority over the contract.
- [TypeScript](https://github.com/lm15-dev/lm15-ts)
- [Rust](https://github.com/lm15-dev/lm15-rs)
- [Go](https://github.com/lm15-dev/lm15-go)
- [Julia](https://github.com/lm15-dev/lm15-jl)

Check each repository for installation, release status, and supported features. Some website guides are still under construction; use the contract and the selected SDK’s source for details.