At the heart of the Interlay and Kintsugi networks lay the substrate-based parachains. The functionality, protocols, and security aspects of the parachains are all detailed in the specification. If you want to get started working on the core Interlay and Kintsugi networks, understand in detail how the system works, and contribute to it, this is the primary starting point.
The core of the system: the parachain implementing the Interlay and Kintsugi networks.
The off-chain client implementing the Vault.
A TypeScript library to interact with the Interlay and Kintsugi networks. See also TypeScript Integration