LanguageServerAPIs The Lanugage Server APIs provides basic facilities for getting or supplying information used by language server implementations.
Diagnostic can link to the details of the error code using URL.
CodeLensProvider SPI allows to provide code lens for a given document.
DiagnosticReporter SPI should be implemented to allow alerting the LSP server core that diagnostics for certain file(s) may have changed. The core implementation should then poll ErrorProviders to collect the diagnostics. API clients should call Diagnostic.findReporterControl to obtain an accessor which can fire the alert.
StructureProvider interface allows to compute structure (tree of
of the given file.
XXX no answer for arch-usecases
XXX no answer for deploy-dependencies
Read more about the implementation in the answers to architecture questions.