LSP specification implementation status

Text Document Capabilities

• ✅ synchronization
  • ✅ didOpen
  • ✅ didChange
    • ✅ Full text sync
    • ✅ Incremental text sync
  • ✅ willSave
  • ✅ willSaveWaitUntil
  • ✅ didSave
    • ✅ Include text
  • ✅ didClose
• ✅ completion
  • ✅ insertText
  • ✅ textEdit
  • ❌ prefix filter textEdit
  • ✅ documentation (both static and from completionItem/resolve)
  • ✅ Run command after inserting completion
  • ❌ insertReplaceEdit #1413, #1809
• ✅ hover
• ✅ signatureHelp
  • ❌ context
• ✅ declaration
  • ✅ link support
• ✅ definition
  • ✅ link support
• ✅ typeDefinition
  • ✅ link support
• ✅ implementation
  • ✅ link support
• ✅ references
• ✅ documentHighlight
• ✅ documentSymbol
• ✅ codeAction
  • ✅ resolve
• ✅ codeLens (only when backed by a helper package)
• ✅ documentLink
  • ✅ resolve
• ✅ colorProvider
  • ❌ color picker #1291
• ✅ formatting
• ✅ rangeFormatting
• ❌ onTypeFormatting
• ✅ rename
• ✅ publishDiagnostics
• ❌ foldingRange sublimehq/sublime_text#3389
• ✅ selectionRange
• ❌ linkedEditingRange
• ❌ callHierarchy #1429
• ✅ semanticTokens (sublimehq/sublime_text#817)
• ❌ typeHierarchy
• ❌ inlineHint #1746
• ❌ diagnostic (Pull Diagnostics)

Workspace Capabilities

• ✅ applyEdit
• ✅ workspaceEdit
  • ✅ documentChanges
  • ❌ resourceOperations
  • ❌ failureHandling
• ✅ didChangeConfiguration
• ❌ didChangeWatchedFiles #892, sublimehq/sublime_text#2669
• ✅ symbol
• ✅ executeCommand
• ✅ workspaceFolders
• ✅ configuration
• ✅ semanticTokens (refresh)
• ✅ codeLens (refresh)
• ❌ fileOperations
• ❌ inlayHint (refresh)
• ❌ diagnostics (workspace diagnostic request)

Window Capabilities

• ✅ workDoneProgress
  • ✅ create
  • ❌ cancel
• ✅ showMessage
• ✅ showDocument

Dynamic Registration

✅ Fully implemented