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Let Eglot do the introductions

Connect a project to an installed language server.

built-in / development / eglot / language-server

Eglot is built into Emacs 29 and later. You still need to install a language server for your language, such as clangd for C and C++.

Open a source file and run M-x eglot. Emacs offers completion, diagnostics, and navigation using its ordinary editing commands.

Start interactively before adding the use-package declaration. That makes missing executables and project configuration problems easier to understand. The example starts Eglot in C and C++ buffers; adapt the hooks for your language.

Completion, project navigation, Flymake diagnostics, and Eldoc documentation use familiar built-in interfaces rather than a separate dashboard.

;; Emacs 29+, with clangd installed separately.
(use-package eglot
  :ensure nil
  :hook ((c-mode . eglot-ensure)
         (c++-mode . eglot-ensure)))

Read the documentation