> Canonical guide: https://developers.foxlight.ai/build/application-interfaces/
> Contract snapshots: Skulk 2.0.0 (b0af39c79b6b7102b2478062904f1d7cc8619975); SDK 0.4.0 (31bb090b8f64689f87514e48385e22b6ad94a6c2). Check the installed runtime when versions differ.

# Application interfaces

Declare reachable application links and readiness as part of the capability-node surface. Users can open an application from its satellite and inspect its details.

## How it works

A discovered link must still be reachable from the browser. Use the managed SDK’s serving helpers when the host supplies a serving address. Apply authorization to management and application effects.

## Complete contract

Read the [Skulk 2.0 development guide](https://docs.foxlight.ai/skulk/next/extensions/#publishing-a-capability-node-publish_capability_node) for the complete parameters, constraints, examples and operational behavior.