Packages

Kit has a growing ecosystem of packages that extend its capabilities. Packages provide integrations with databases, web services, data formats, and more. First-party packages are maintained by the Kit team and are commonly imported through the Kit.* namespace once installed.

Installing Packages

Add a package to your project from a Git URL:

kit add https://gitlab.com/kit-lang/packages/kit-postgres

Or add it directly to your kit.toml:

[dependencies]
postgres = { git = "https://gitlab.com/kit-lang/packages/kit-postgres" }

# Pin to a specific tag
curl = { git = "https://gitlab.com/kit-lang/packages/kit-curl", tag = "v2026.6.26" }

# Pin to a specific branch
yaml = { git = "https://gitlab.com/kit-lang/packages/kit-yaml", branch = "main" }

Then run kit install to fetch dependencies. Kit also installs dependencies declared by those packages, so transitive package requirements are resolved automatically.

For example, kit-raylib is imported as import Kit.Raylib as Raylib. Packages backed by C or Zig FFI list any required native libraries and platform install commands on their package pages.

1st-party Packages

The packages below are maintained by the Kit team and available on GitLab. They form Kit's first-party extension layer: broader than the standard library, but still documented and versioned with Kit releases. Third-party packages can be hosted anywhere and installed via kit add.

Web & HTTP Services

kit-crooner

A Sinatra-inspired web framework for Kit

kit-curl

libcurl bindings for Kit - HTTP client for GET, POST, PUT, DELETE requests

kit-oauth

OAuth 2.0 client library for Kit

kit-odata

OData v4 client for Kit - query builder, filtering, and pagination

kit-template

Simple templating engine for Kit

Networking & Messaging

kit-websocket

WebSocket client and server for Kit using native Zig FFI (RFC 6455)

kit-smtp

SMTP email client for Kit using native Zig FFI

kit-nats

NATS client for Kit using native Zig FFI

kit-zmq

ZeroMQ bindings for Kit via czmq - high-performance messaging for distributed applications

kit-mqtt

MQTT protocol client bindings for Kit

kit-nng

NNG (nanomsg-next-gen) lightweight messaging library bindings for Kit

kit-libuv

Asynchronous I/O library wrapping libuv for Kit

Databases & Storage

kit-postgres

PostgreSQL bindings for Kit using libpq

kit-sqlite

SQLite bindings for Kit

kit-duckdb

DuckDB bindings for Kit - in-process analytical database

kit-mongoc

MongoDB C driver (libmongoc) bindings for Kit

kit-mgclient

Memgraph mgclient native bindings for Kit

kit-cassandra

Apache Cassandra client for Kit using CQL Native Protocol

kit-redis

Redis client for Kit using native Zig FFI

kit-hiredis

Hiredis minimalistic Redis client bindings for Kit

kit-memcached

Memcached client for Kit using vendored mcmc C bindings

kit-lmdb

LMDB embedded key-value store bindings for Kit

kit-query

Fluent SQL query builder for Kit

kit-pg-parser

PostgreSQL SQL parser - parse, validate, normalize, and fingerprint SQL queries using libpg_query

Cloud & Distributed Systems

kit-aws-core

AWS core library - credentials, signing, and shared utilities

kit-aws-s3

AWS S3 client for Kit

kit-azure-core

Azure core library - authentication, configuration, and shared utilities

kit-azure-storage

Azure Blob Storage client for Kit

kit-gcp-core

GCP core library - authentication, project config, and shared utilities

kit-gcp-storage

GCP Cloud Storage client for Kit

kit-dapr

Dapr (Distributed Application Runtime) client for Kit

kit-health-check

Health check types, runner, and JSON output for Kit cloud deployments

kit-otel

OpenTelemetry observability for Kit — metrics, traces, and log correlation

AI & Machine Learning

kit-agent

Composable agent primitives for Kit applications

kit-llm

Small LLM provider clients and kit-agent adapters for Kit

kit-mcp

MCP (Model Context Protocol) server library for Kit — stdio and Streamable HTTP transports

kit-mcp-ui

MCP-UI support for Kit — rich UI rendering in MCP tool results

kit-embeddings

Lightweight vector embeddings store for RAG applications

kit-vdb

VDB vector database bindings for Kit — store and search high-dimensional vector embeddings

Data Processing & Analytics

kit-arrow

Apache Arrow columnar data format for Kit

kit-parquet

Apache Parquet columnar storage format for Kit

kit-dataframe

High-performance columnar DataFrame for Kit with SIMD acceleration

kit-transducer

Clojure-inspired transducers for composable, reusable transformations

kit-kts

Kit Term Storage - fast, concurrent in-memory tables inspired by Erlang's ETS

kit-libcsv

CSV parsing and generation library for Kit using libcsv

kit-kreuzberg

Kreuzberg document extraction bindings for Kit

kit-postal

libpostal address parsing and normalization library bindings for Kit

Data Formats & Serialization

kit-flatbuf

FlatBuffers binary serialization for Kit - zero-copy read access

kit-protobuf

Protocol Buffers binary serialization for Kit

kit-msgpack

MessagePack binary serialization for Kit

kit-cbor

CBOR (Concise Binary Object Representation) encoding and decoding for Kit

kit-edn

EDN (Extensible Data Notation) parsing and generation for Kit

kit-lite3

Lite3 zero-copy serialization format bindings for Kit

kit-toon

TOON (Token-Oriented Object Notation) encoder/decoder for Kit - reduces token usage by 30-60% compared to JSON

kit-xml

XML parsing, generation, and XPath queries using libxml2

kit-yaml

YAML parsing and generation for Kit

kit-markdown

Markdown parsing and HTML rendering for Kit

kit-cmark

CommonMark Markdown parser and renderer bindings for Kit

kit-pdf

PDF reading and writing library for Kit using pdfio

kit-libarchive

libarchive bindings for reading and writing archive formats in Kit

kit-lz4

LZ4 fast compression library bindings for Kit

kit-zstd

Zstandard compression library bindings for Kit

Cryptography & Security

kit-crypto

Cryptographic primitives for Kit using Zig std.crypto (no external deps)

kit-jwt

JSON Web Token (JWT) encoding and decoding for Kit

kit-sodium

Comprehensive cryptographic library for Kit using libsodium

kit-rsa

RSA cryptographic operations for Kit using OpenSSL

kit-policy

A flexible, composable authorization framework for Kit inspired by Action Policy

Graphics, GPU & Game Development

kit-sdl

SDL2 bindings for Kit - cross-platform windowing, input, and graphics

kit-glfw

GLFW windowing and input library bindings for Kit

kit-raylib

Raylib game development library bindings for Kit

kit-sokol

Cross-platform graphics and audio library bindings for Kit using sokol-zig

kit-image

Image loading and manipulation for Kit using stb_image

kit-imagemagick

ImageMagick bindings for Kit - image processing and manipulation

kit-opencv

OpenCV computer vision library bindings for Kit

kit-cairo

Cairo 2D vector graphics library bindings for Kit

kit-vips

libvips fast image processing library bindings for Kit

kit-svg

Type-safe SVG generation library for Kit

kit-plot

Compositional visualization library inspired by Algebra of Graphics

kit-metal

Apple Metal GPU bindings for Kit - graphics and compute on macOS

kit-vulkan

Vulkan graphics API bindings for Kit - low-level GPU compute and graphics

kit-wgpu

Cross-platform GPU compute and rendering via WebGPU (wgpu-native)

kit-tiny-skia

CPU raster rendering for Kit using tiny-skia

kit-cuda

CUDA GPU computing via cuBLAS, cuFFT, and CUDA runtime (requires NVIDIA GPU and CUDA toolkit)

kit-opencl

Cross-platform GPU computing via OpenCL (works on NVIDIA, AMD, Intel, and Apple GPUs)

kit-game

A LÖVE-inspired game development framework for Kit

kit-tilemap

Tiled JSON and TMX tilemap loading and collision helpers

kit-box2d

Kit bindings for Box2D v3 - 2D physics engine with rigid bodies, joints, and collision detection

kit-geometry

Basic geometric types and operations for 2D and 3D space

GUI & Desktop Applications

kit-glib

GLib/GObject main loop and signal foundation for Kit GUI packages

kit-gtk

GTK 4 application and window foundation for Kit

kit-tk

Tk GUI toolkit bindings for Kit - cross-platform windowed applications

kit-tea

The Elm Architecture (TEA) framework for Kit - functional GUI programming

kit-ui

SwiftUI-style retained UI framework bootstrap for Kit using SDL and WGPU

kit-egui

Immediate-mode GUI primitives for Kit inspired by egui

kit-zgpui

ZGPUI - A GPU-accelerated UI framework for Kit inspired by Zed's GPUI, powered by raylib

kit-microui

microui immediate-mode GUI library bindings for Kit

kit-nuklear

Nuklear immediate-mode GUI library bindings for Kit

kit-raygui

Raygui immediate-mode GUI library bindings for Kit

kit-ncurses

ncurses terminal UI library bindings for Kit

kit-linenoise

linenoise line editing library bindings for Kit

Multimedia & Audio

kit-ffmpeg

FFmpeg bindings for Kit - video and audio processing

kit-flite

Flite text-to-speech synthesis bindings for Kit

kit-audio

Cross-platform audio playback and recording for Kit using miniaudio

kit-sndfile

libsndfile audio file I/O library bindings for Kit