# Linera (Zefchain Labs)

> Linera is a decentralized Web3 protocol built by Zefchain Labs for highly
> scalable, low-latency applications using a "microchain" architecture, where
> each user or application runs its own lightweight chain. Developers build
> applications in Rust with the Linera SDK, deploy them to a public Testnet, and
> expose chain state to web frontends through a GraphQL node service. (Generated
> by the API Evangelist enrichment pipeline from public sources; not an official
> llms.txt.)

## Developer Documentation
- [Linera developer manual](https://linera.dev): protocol overview, getting started, core concepts (microchains, wallets, applications), backend (Rust SDK) and frontend (JavaScript) development.
- [Getting started](https://linera.dev/developers/getting_started.html): install the CLI, claim a microchain on the Testnet, deploy a first application.
- [Node service (GraphQL)](https://linera.dev/developers/core_concepts/node_service.html): how a wallet runs a GraphQL service exposing chain state to frontends.

## APIs
- GraphQL node service: queries, mutations, and subscriptions over microchain state (self-hosted via `linera service`). No REST/OpenAPI surface. Authorization is by cryptographic wallet signature, not OAuth.

## Client Libraries (first-party)
- Rust: linera-sdk, linera-base, linera-views, linera-execution, linera-chain, linera-core, linera-rpc, linera-service-graphql-client (crates.io).
- Web/npm: @linera/client, @linera/signer, @linera/metamask.

## CLI
- `linera` command-line tool: wallet management, local test networks, running the node service, scaffolding/publishing applications.

## Source & Community
- [GitHub org](https://github.com/linera-io) — main repo linera-io/linera-protocol (Rust, Apache-2.0).
- Website: https://linera.io ; Linera Markets trading platform is also a Zefchain Labs product.

## Notes for agents
- Current release line: 0.15.x (pre-1.0); breaking changes may land between minor versions.
- The developer surface targets a public Testnet; there is no long-term-support production API guarantee.