diff --git a/configuration.nix b/configuration.nix
index 78dad9c7..011d6fae 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -25,7 +25,6 @@ isMaximal: {
       trouble.enable = true;
       lspSignature.enable = true;
       otter-nvim.enable = isMaximal;
-      lsplines.enable = isMaximal;
       nvim-docs-view.enable = isMaximal;
     };
 
diff --git a/docs/release-notes/rl-0.8.md b/docs/release-notes/rl-0.8.md
index 8d5562c4..a245b006 100644
--- a/docs/release-notes/rl-0.8.md
+++ b/docs/release-notes/rl-0.8.md
@@ -87,6 +87,10 @@
 - Add [oil.nvim] as an alternative file explorer. It will be available under
   `vim.utility.oil-nvim`.
 
+- Add `vim.diagnostics` to interact with Neovim's diagnostics module. Available
+  options for `vim.diagnostic.config()` can now be customized through the
+  [](#opt-vim.diagnostics.config) in nvf.
+
 [amadaluzia](https://github.com/amadaluzia):
 
 [haskell-tools.nvim]: https://github.com/MrcJkb/haskell-tools.nvim
@@ -253,8 +257,8 @@
   [friendly-snippets](https://github.com/rafamadriz/friendly-snippets) so
   blink.cmp can source snippets from it.
 - Fix [blink.cmp] breaking when built-in sources were modified.
-- Fix [conform.nvim] not allowing disabling formatting on and after save.
-  Use `null` value to disable them if conform is enabled.
+- Fix [conform.nvim] not allowing disabling formatting on and after save. Use
+  `null` value to disable them if conform is enabled.
 
 [TheColorman](https://github.com/TheColorman):
 
diff --git a/modules/extra/deprecations.nix b/modules/extra/deprecations.nix
index 5efe2ae2..86497130 100644
--- a/modules/extra/deprecations.nix
+++ b/modules/extra/deprecations.nix
@@ -104,6 +104,13 @@ in {
         their behaviour was abstract, and confusing. Please use 'vim.options' or 'vim.luaConfigRC'
         to replicate previous behaviour.
       '')
+
+      # 2025-04-04
+      (mkRemovedOptionModule ["vim" "lsp" "lsplines"] ''
+        lsplines module has been removed from nvf, as its functionality is now built into Neovim
+        under the diagnostics module. Please consider using one of 'vim.diagnostics.config' or
+        'vim.luaConfigRC' to configure LSP lines for Neovim through its own diagnostics API.
+      '')
     ]
 
     # Migrated via batchRenameOptions. Further batch renames must be below this line.
diff --git a/modules/neovim/init/default.nix b/modules/neovim/init/default.nix
index ac9d29e5..0e7a4c6b 100644
--- a/modules/neovim/init/default.nix
+++ b/modules/neovim/init/default.nix
@@ -3,6 +3,7 @@
     ./autocmds.nix
     ./basic.nix
     ./debug.nix
+    ./diagnostics.nix
     ./highlight.nix
     ./spellcheck.nix
   ];
diff --git a/modules/neovim/init/diagnostics.nix b/modules/neovim/init/diagnostics.nix
new file mode 100644
index 00000000..26ca6e84
--- /dev/null
+++ b/modules/neovim/init/diagnostics.nix
@@ -0,0 +1,102 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib.modules) mkIf;
+  inherit (lib.options) mkOption mkEnableOption literalExpression;
+  inherit (lib.types) attrsOf anything oneOf bool submodule;
+  inherit (lib.nvim.dag) entryAfter;
+  inherit (lib.nvim.types) luaInline;
+  inherit (lib.nvim.lua) toLuaObject;
+
+  cfg = config.vim.diagnostics;
+
+  diagnosticType = oneOf [(attrsOf anything) bool luaInline];
+  diagnosticsSubmodule = submodule {
+    freeformType = attrsOf diagnosticType;
+    underline = mkOption {
+      type = diagnosticType;
+      default = true;
+      description = "Use underline for diagnostics.";
+    };
+
+    virtual_text = mkOption {
+      type = diagnosticType;
+      default = false;
+      example = literalExpression ''
+        {
+          format = lib.generators.mkLuaInline '''
+            function(diagnostic)
+              return string.format("%s (%s)", diagnostic.message, diagnostic.source)
+            end
+          ''';
+        }
+      '';
+
+      description = ''
+        Use virtual text for diagnostics. If multiple diagnostics are set for a namespace,
+        one prefix per diagnostic + the last diagnostic message are shown.
+      '';
+    };
+
+    virtual_lines = mkOption {
+      type = diagnosticType;
+      default = false;
+      description = ''
+        Use virtual lines for diagnostics.
+      '';
+    };
+
+    signs = mkOption {
+      type = diagnosticType;
+      default = false;
+      example = {
+        signs.text = {
+          "vim.diagnostic.severity.ERROR" = "󰅚 ";
+          "vim.diagnostic.severity.WARN" = "󰀪 ";
+        };
+      };
+      description = ''
+        Use signs for diagnostics. See {command}`:help diagnostic-signs`.
+      '';
+    };
+
+    update_in_insert = mkOption {
+      type = bool;
+      default = false;
+      description = ''
+        Update diagnostics in Insert mode. If `false`, diagnostics will
+        be updated on InsertLeave ({command}`:help InsertLeave`).
+      '';
+    };
+  };
+in {
+  options.vim = {
+    diagnostics = {
+      enable = mkEnableOption "diagostics module for Neovim";
+      config = mkOption {
+        type = diagnosticsSubmodule;
+        default = {};
+        description = ''
+          Values that will be passed to `vim.diagnostic.config` after being converted
+          to a Lua table. Possible values for each key can be found in the help text
+          for `vim.diagnostics.Opts`. You may find more about the diagnostics API of
+          Neovim in {command}`:help diagnostic-api`.
+
+          :::{.note}
+          This option is freeform. You may set values that are not present in nvf
+          documentation, but those values will not be fully type checked. Please
+          refer to the help text for `vim.diagnostic.Opts` for appropriate values.
+          :::
+        '';
+      };
+    };
+  };
+
+  config.vim = mkIf cfg.enable {
+    luaConfigRC.diagnostics = entryAfter ["basic"] ''
+      vim.diagnostic.config(${toLuaObject cfg.config})
+    '';
+  };
+}
diff --git a/modules/plugins/lsp/default.nix b/modules/plugins/lsp/default.nix
index 421f5fda..eb694583 100644
--- a/modules/plugins/lsp/default.nix
+++ b/modules/plugins/lsp/default.nix
@@ -15,7 +15,6 @@
     ./lightbulb
     ./otter
     ./lspkind
-    ./lsplines
     ./nvim-docs-view
   ];
 }
diff --git a/modules/plugins/lsp/lsplines/config.nix b/modules/plugins/lsp/lsplines/config.nix
deleted file mode 100644
index bb07edc9..00000000
--- a/modules/plugins/lsp/lsplines/config.nix
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  config,
-  lib,
-  ...
-}: let
-  inherit (lib.modules) mkIf;
-  inherit (lib.nvim.dag) entryAfter;
-
-  cfg = config.vim.lsp;
-in {
-  config = mkIf (cfg.enable && cfg.lsplines.enable) {
-    vim.startPlugins = ["lsp-lines"];
-    vim.pluginRC.lsplines = entryAfter ["lspconfig"] ''
-      require("lsp_lines").setup()
-
-      vim.diagnostic.config({
-        virtual_text = false,
-      })
-    '';
-  };
-}
diff --git a/modules/plugins/lsp/lsplines/default.nix b/modules/plugins/lsp/lsplines/default.nix
deleted file mode 100644
index 359cec4f..00000000
--- a/modules/plugins/lsp/lsplines/default.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  imports = [
-    ./config.nix
-    ./lsplines.nix
-  ];
-}
diff --git a/modules/plugins/lsp/lsplines/lsplines.nix b/modules/plugins/lsp/lsplines/lsplines.nix
deleted file mode 100644
index aac4cbbc..00000000
--- a/modules/plugins/lsp/lsplines/lsplines.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-{lib, ...}: let
-  inherit (lib.options) mkEnableOption;
-in {
-  options.vim.lsp = {
-    lsplines = {
-      enable = mkEnableOption ''
-        diagnostics using virtual lines on top of the real line of code. [lsp_lines]
-      '';
-    };
-  };
-}
diff --git a/npins/sources.json b/npins/sources.json
index 86fa0f6b..140b3b24 100644
--- a/npins/sources.json
+++ b/npins/sources.json
@@ -747,18 +747,6 @@
       "url": "https://github.com/kawre/leetcode.nvim/archive/db7e1cd6b9191b34b4c1f2f96e4e3949cde9f951.tar.gz",
       "hash": "1d3lb7625b2qdzqm74mzrac66rxqc0qgjd3mb37l4v8wqyiyv6pp"
     },
-    "lsp-lines": {
-      "type": "Git",
-      "repository": {
-        "type": "Git",
-        "url": "https://git.sr.ht/~whynothugo/lsp_lines.nvim"
-      },
-      "branch": "main",
-      "submodules": false,
-      "revision": "a92c755f182b89ea91bd8a6a2227208026f27b4d",
-      "url": null,
-      "hash": "14ym4d8vgvw2vhsaxik8612wyvszd895q69n9h100yd7x5jqhy4c"
-    },
     "lsp-signature-nvim": {
       "type": "Git",
       "repository": {