# CeeSafe

> CeeSafe is a memory-safe systems programming language with C#- and TypeScript-style syntax, compiled ahead of
> time to portable C11. Ownership and borrowing are checked at compile time; there is no garbage collector. Its
> compiler, ceesafec, is written in CeeSafe.

Agents writing CeeSafe: read the agent guide first, and use `ceesafec mcp` (an MCP server with a checker, fixes, a
sandboxed interpreter and this documentation) or `ceesafec check --diagnostics-format=json` and `ceesafec fix`.
Before concluding that a function or method does not exist, look it up: `ceesafe_api` (MCP) with its name, or the
built-in types page and the lib/core and lib/std API pages below.

## Guide

- [What CeeSafe is](https://ceesafe.github.io/CeeSafe/guide/introduction.md)
- [Installation](https://ceesafe.github.io/CeeSafe/guide/installation.md)
- [Getting started](https://ceesafe.github.io/CeeSafe/guide/getting-started.md)
- [CeeSafe for AI agents](https://ceesafe.github.io/CeeSafe/guide/for-agents.md)
- [Built-in types and functions](https://ceesafe.github.io/CeeSafe/guide/builtins.md)
- [Basics](https://ceesafe.github.io/CeeSafe/guide/basics.md)
- [Structs, enums and patterns](https://ceesafe.github.io/CeeSafe/guide/structs-and-enums.md)
- [Ownership and borrowing](https://ceesafe.github.io/CeeSafe/guide/ownership.md)
- [Errors](https://ceesafe.github.io/CeeSafe/guide/errors.md)
- [Memory and allocation](https://ceesafe.github.io/CeeSafe/guide/memory.md)
- [Arrays, slices and collections](https://ceesafe.github.io/CeeSafe/guide/collections.md)
- [Generics and interfaces](https://ceesafe.github.io/CeeSafe/guide/generics.md)
- [Functions and closures](https://ceesafe.github.io/CeeSafe/guide/closures.md)
- [Threads](https://ceesafe.github.io/CeeSafe/guide/threads.md)
- [Unsafe code and C](https://ceesafe.github.io/CeeSafe/guide/unsafe-and-c.md)
- [Kernel code](https://ceesafe.github.io/CeeSafe/guide/kernel.md)
- [The ceesafec command](https://ceesafe.github.io/CeeSafe/guide/ceesafec.md)
- [Packages](https://ceesafe.github.io/CeeSafe/guide/packages.md)
- [Formatting and documentation](https://ceesafe.github.io/CeeSafe/guide/formatting-and-docs.md)
- [Editors](https://ceesafe.github.io/CeeSafe/guide/editors.md)
- [Debugging](https://ceesafe.github.io/CeeSafe/guide/debugging.md)
- [Coming from another language](https://ceesafe.github.io/CeeSafe/guide/coming-from/index.md)
- [CeeSafe for Rust programmers](https://ceesafe.github.io/CeeSafe/guide/coming-from/rust.md)
- [CeeSafe for Zig programmers](https://ceesafe.github.io/CeeSafe/guide/coming-from/zig.md)
- [CeeSafe for C and C++ programmers](https://ceesafe.github.io/CeeSafe/guide/coming-from/c-and-cpp.md)
- [CeeSafe for C#, Java and TypeScript programmers](https://ceesafe.github.io/CeeSafe/guide/coming-from/csharp-java-typescript.md)
- [CeeSafe for Go programmers](https://ceesafe.github.io/CeeSafe/guide/coming-from/go.md)
- [Clay: a UI toolkit in CeeSafe](https://ceesafe.github.io/CeeSafe/guide/clay.md)
- [Async tasks](https://ceesafe.github.io/CeeSafe/guide/async.md)
- [Performance](https://ceesafe.github.io/CeeSafe/guide/performance.md)
- [Testing](https://ceesafe.github.io/CeeSafe/guide/testing.md)

## Specification

- [CeeSafe Grammar — M1 subset](https://ceesafe.github.io/CeeSafe/reference/grammar.md)
- [Type System and Static Semantics — M1 subset](https://ceesafe.github.io/CeeSafe/reference/type-system.md)
- [Diagnostics](https://ceesafe.github.io/CeeSafe/reference/diagnostics.md)
- [Unsafe Code — Contract and Checks](https://ceesafe.github.io/CeeSafe/reference/unsafe.md)
- [Ownership, Borrowing and Lifetimes — Formal Safety Design (v0)](https://ceesafe.github.io/CeeSafe/reference/ownership.md)
- [References and the Borrow Checker (M2b)](https://ceesafe.github.io/CeeSafe/reference/lifetimes.md)
- [CeeSafe Memory Model and Allocation Architecture (v0)](https://ceesafe.github.io/CeeSafe/reference/memory-model.md)
- [Formatting (M10 T1)](https://ceesafe.github.io/CeeSafe/reference/formatting.md)
- [Tooling (M10)](https://ceesafe.github.io/CeeSafe/reference/tooling.md)
- [C Backend Design (v0)](https://ceesafe.github.io/CeeSafe/reference/c-backend.md)

## Optional

- [Everything above in one file](https://ceesafe.github.io/CeeSafe/llms-full.txt)
- [Library: lib/core](https://ceesafe.github.io/CeeSafe/reference/api/core.md)
- [Library: lib/std](https://ceesafe.github.io/CeeSafe/reference/api/std.md)
- [The specification's index](https://ceesafe.github.io/CeeSafe/reference/index.md)