JSON: LSP not refreshing completions when schemas are updated

[plugd-in]

When using a relative path for a JSON schema (e.g. ./schema/main.schema.json), changes to the schema aren't reflected in the relevant JSON files that use the schema.

Part of the json-language-server is that $schemas that don't use a supported scheme ask the client to resolve the URI using a vscode/content request. Zed handles this here, but subsequent changes to the schema aren't reported to the LSP. My expectation is that if the schema is within the project, that Zed reports changes to the schema file via a json/schemaContent notification.

From json-language-server docs:

When the client is aware that a schema content has changed, it will notify the server through a notification. This notification is a JSON language server-specific, non-standardized, extension to the LSP. The server will, as a response, clear the schema content from the cache and reload the schema content when required again.

Notification:

• method: 'json/schemaContent'
• params: string the URL of the schema that has changed.

A potential implementation is to register the files for watching when a vscode/content request is made and send a json/schemaContent request when the file changes. Here's where the VS Code JSON extension handles such changes.