Germ Network

We build Germ — an end-to-end encrypted messaging app — using Swift, and maintain these open source libraries:

Top-level protocols

The two main protocols you need to construct Germ's cross-user wire formats:

Package	What it does	License
autonomous-comm-protocol	`CommProtocol` — a protocol for autonomous communication between users	MIT
twomlspq-swift	Swift-native 1:1 triple ratchet (TwoMLSPQ)	Apache-2.0 OR MIT

A family of protocols for atproto clients.

Package	What it does	License
AtprotoClient	AT Protocol client that takes an injected OAuth session for authenticated requests	MIT
AtprotoOAuth	AT Protocol OAuth client	MIT
AtprotoTypes	Swift types for AT Protocol primitives, with verification and mock variants	MIT
Microcosm	Client for the AT Protocol services on microcosm.blue	MIT

Package	What it does	License
swift-mls	A construction kit for MLS-family protocols (RFC 9420), built on swift-crypto	MIT
swift-raae	Random-access authenticated encryption and the SEAL construction, per `draft-sullivan-cfrg-raae`. Pre-1.0: stored bytes are not yet stable across draft revisions	MIT
TwoMLSPQ	A rust implementation of twomlspq. Now superceded by twomlspq-swift, but this was the original implementation that contains the protocol reference.	Apache-2.0 OR MIT

Package	What it does	License
jxl-encoder-swift	Pure-Swift lossy JPEG XL encoder (ISO/IEC 18181) — no unsafe constructs, no C dependencies; a port of libjxl	BSD-3-Clause
oauth4swift	Building blocks for OAuth 2.1 clients, inspired by oauth4webapi	MIT

Package	What it does	License
GermConvenience	Leaf-dependency convenience extensions shared across Germ projects (HTTP, HTTP signatures, CBOR)	MIT
swift-secret-bytes	Zeroizing custody types for secret bytes, built around swift-crypto's `SymmetricKey`	MIT

Package	What it does	License
atproto-pmr	Interop specification for the Atproto Personal Messaging Relay — a weakly trusted, persistently online delegate of an atproto DID	MIT