How-to: Handle Unsupported Requires

Use manifest requires as the load-time compatibility contract.

Steps

1. Fetch the NIP-5A manifest.
2. Parse required NAP names.
3. Compare them with shell capability inventory.
4. Reject loading or show a clear compatibility warning before treating the napplet as usable.

const unsupported = manifest.requires.filter(
  (name) => !bridgeSupports(name),
);

if (unsupported.length > 0) {
  showCompatibilityWarning(unsupported);
  return;
}

Do not load a napplet and then silently fail required NAP calls. Optional features should use hosted supports() checks inside the napplet.