Packages

Kit has a growing ecosystem of packages that extend its capabilities. Packages provide integrations with databases, web services, data formats, and more.

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 = "v2026.1.13" }

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

Then run kit install to fetch dependencies.

1st-party Packages

The packages below are maintained by the Kit team and available on GitLab. Third-party packages can be hosted anywhere and installed via kit add.

Networking

kit-websocket

WebSocket client and server for real-time communication.

kit-smtp

SMTP email client with TLS, authentication, and attachments.

kit-nats

NATS client for high-performance pub/sub messaging and request-reply patterns.

kit-zmq

ZeroMQ bindings for distributed messaging with REQ/REP, PUB/SUB, and PUSH/PULL patterns.

Concurrency

kit-libuv

Asynchronous I/O with libuv for event loops, timers, and file system operations.

Databases

kit-redis

Redis client with strings, lists, sets, hashes, and pub/sub support.

kit-postgres

PostgreSQL database client with connection pooling and parameterized queries.

kit-sqlite

Embedded SQLite database for local storage and single-file databases.

kit-duckdb

DuckDB analytical database for OLAP workloads and analytics.

kit-cassandra

Apache Cassandra client using native CQL protocol. No external dependencies.

kit-query

Fluent SQL query builder that works with any Kit database driver.

kit-pg-parser

PostgreSQL SQL parser for parsing, validating, normalizing, and fingerprinting queries.

Web and HTTP

kit-curl

HTTP client powered by libcurl for making web requests.

kit-crooner

A Sinatra-inspired web framework for Kit with routing and middleware.

kit-oauth

OAuth 2.0 client for authentication with third-party services.

kit-jwt

JSON Web Token encoding, decoding, and verification.

Data Structures

kit-dataframe

High-performance columnar DataFrame with SIMD acceleration and CSV I/O.

kit-factgraph

Knowledge graph for facts and calculations with typed schemas and validation.

kit-transducer

Clojure-inspired transducers for composable, reusable transformations.

kit-kts

Kit Type System utilities for runtime type information and reflection.

Data Formats

kit-yaml

YAML parsing and generation for configuration files.

kit-xml

XML parsing and generation.

kit-edn

EDN (Extensible Data Notation) parsing and generation - Clojure's data format.

kit-msgpack

MessagePack binary serialization format.

kit-protobuf

Protocol Buffers serialization.

kit-parquet

Apache Parquet columnar file format.

kit-arrow

Apache Arrow columnar data format for analytics and DataFrames.

kit-flatbuf

FlatBuffers binary serialization with zero-copy read access.

kit-lite3

Lite3 zero-copy serialization format bindings for Kit.

kit-toon

TOON format encoder/decoder, reduces token usage 30-60% vs JSON.

kit-markdown

Markdown parsing and rendering.

kit-cbor

CBOR (Concise Binary Object Representation) encoding and decoding.

Audio and Video

kit-audio

Audio file reading, writing, and processing.

kit-ffmpeg

Video and audio transcoding with FFmpeg.

kit-flite

Text-to-speech synthesis using the CMU Flite engine.

Graphics

kit-image

Image loading, manipulation, and saving in various formats.

kit-imagemagick

ImageMagick bindings for image processing, filters, and format conversion.

kit-sdl

SDL2 bindings for graphics, input, and game development.

kit-raylib

Raylib bindings for simple graphics and game development.

kit-metal

Apple Metal GPU bindings for graphics and compute on macOS.

kit-sokol

Cross-platform graphics and audio library using sokol-zig.

kit-geometry

2D and 3D geometry primitives and operations.

kit-nuklear

Immediate mode GUI library for game tools and simple interfaces.

kit-zgpui

ZG Pure UI bindings for cross-platform GUI applications.

kit-tea

The Elm Architecture (TEA) framework for functional GUI programming.

kit-tk

Tk GUI toolkit bindings for cross-platform windowed applications.

kit-game

A LÖVE-inspired game development framework for Kit.

Cryptography

kit-crypto

Cryptographic operations including hashing, encryption, and signatures.

kit-fasthash

Fast non-cryptographic hash functions.

kit-sodium

Modern cryptography library with libsodium for encryption, signatures, and hashing.

kit-rsa

RSA cryptographic operations for JWT signing and verification.

Cloud Services

kit-aws-core

AWS SDK core utilities for authentication and signing.

kit-aws-s3

AWS S3 client for object storage.

kit-gcp-core

Google Cloud Platform core utilities.

kit-gcp-storage

Google Cloud Storage client.

kit-azure-core

Microsoft Azure core utilities.

kit-azure-storage

Azure Blob Storage client.

Finance

kit-fix

FIX protocol (Financial Information eXchange) implementation for trading.

kit-ta-lib

Technical analysis indicators for financial data.

Machine Learning

kit-embeddings

Lightweight vector embeddings store for RAG applications.

Utilities

kit-regex

Regular expression matching and substitution.

kit-template

Text templating engine.

kit-logging

Structured logging with multiple output formats.

kit-quickcheck

Property-based testing inspired by QuickCheck.

kit-suncalc

Sun and moon position calculations for any location and time.

kit-mruby

Embed mruby (lightweight Ruby) interpreter in Kit programs.

kit-kreuzberg

Document text extraction from PDF, DOCX, PPTX, and other formats.

kit-linear-algebra

BLAS and LAPACK bindings for matrix operations and linear algebra.