microsoft / microsoft/language-server-protocol

What's the correct way for an LSP server to know whether a command is available on the client?

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commands feature-request help wanted
Dominant language
TypeScript
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Description

I'm implementing some refactors where the server needs some input from the user. In order to get input from the user I'm going to need to trigger a command on the client that can ask the user for input (for example, by having a command in the client extension that can call window.showInputBox or some equiv).

However, I can't find a way for the client to advertise (or server to know) which commands are supported on the client.

What's the expected way to handle this? Although I can document the commands that a client needs to implement for specific functionality in the server, that's not very compatible - if I wanted to add new requirements in the future, I'd need to know if the connected client supports them.

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First steps

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Research direction

No file, test, or entry point is named. Start by reviewing the Language Server Protocol's client and server capability model and the discussion in this issue; done would be an agreed, documented mechanism for determining which client commands are available.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
api, backend-api-design
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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