We've been working on our semantic coloring support. This is currently powered by a TS Server plugin but we’d like to merge this work back into TS Server.

The plugin's readme descibed it's purpose and a list of the implemented features.

Also see the Tests for more details: https://github.com/aeschli/typescript-vscode-sh-plugin/blob/master/src/test/semanticTokens.test.ts

Along with the adoption goes the request to improve the encodedSemanticClassifications-full command to also support deltas. See #92963 (comment)