Language Server Protocol

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LanguageServerRegistry

private val languageServers: LanguageServerRegistry by plugin()

​

Register a provider

val registration = languageServers.register(
    this,
    extension = "mylang",
    provider = LanguageServerProvider { client ->
        // Start and return a LanguageServer instance
        MyLanguageServer(client)
    }
)

​

Unregister a provider

registration.unregister()
// or
languageServers.unregister("mylang")

​

Check for a provider

val provider: LanguageServerProvider? = languageServers.getProvider("mylang")

​

LanguageServerProvider

fun interface LanguageServerProvider {
    suspend fun startServer(client: LanguageClient): LanguageServer
}

1. Accept a LanguageClient (used to send notifications/requests to the editor)
2. Start your language server (e.g., via a subprocess, embedded JVM, WASM, etc.)
3. Return a LanguageServer instance that the editor uses to send requests

​

LanguageServerRegistration

interface LanguageServerRegistration {
    fun unregister()
}

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Important notes

• The LSP API requires a working LSP server binary. You may need to bundle one or download it at runtime.
• The server process handles requests from Klyx for the associated file type.
• Klyx manages the server lifecycle — starting it when needed and stopping it when the file is closed.