diff --git a/plugins/by-name/sidekick/default.nix b/plugins/by-name/sidekick/default.nix
new file mode 100644
index 00000000..884fe33c
--- /dev/null
+++ b/plugins/by-name/sidekick/default.nix
@@ -0,0 +1,35 @@
+{
+  lib,
+  config,
+  options,
+  ...
+}:
+lib.nixvim.plugins.mkNeovimPlugin {
+  name = "sidekick";
+  package = "sidekick-nvim";
+
+  maintainers = [ lib.maintainers.khaneliman ];
+
+  dependencies = [
+    "claude-code"
+    "copilot"
+    "gemini"
+    "opencode"
+  ];
+
+  extraConfig = {
+    assertions = lib.nixvim.mkAssertions "plugins.sidekick" {
+      assertion = config.plugins.copilot-lua.enable || config.lsp.servers.copilot.enable;
+      message = "sidekick requires either copilot-lua (${options.plugins.copilot-lua.enable}) or copilot LSP (${options.lsp.servers}.copilot.enable) to be enabled";
+    };
+  };
+
+  settingsExample = {
+    cli = {
+      mux = {
+        backend = "zellij";
+        enabled = true;
+      };
+    };
+  };
+}
diff --git a/tests/test-sources/plugins/by-name/sidekick/default.nix b/tests/test-sources/plugins/by-name/sidekick/default.nix
new file mode 100644
index 00000000..062bc1ce
--- /dev/null
+++ b/tests/test-sources/plugins/by-name/sidekick/default.nix
@@ -0,0 +1,169 @@
+{
+  empty = {
+    plugins.copilot-lua.enable = true;
+    plugins.sidekick.enable = true;
+  };
+
+  defaults = {
+    plugins.copilot-lua.enable = true;
+    plugins.sidekick = {
+      enable = true;
+      settings = {
+        jump = {
+          jumplist = true;
+        };
+        signs = {
+          enabled = true;
+          icon = " ";
+        };
+        nes = {
+          enabled.__raw = ''
+            function(buf)
+              return vim.g.sidekick_nes ~= false and vim.b.sidekick_nes ~= false
+            end'';
+          debounce = 100;
+          trigger = {
+            events = [
+              "InsertLeave"
+              "TextChanged"
+              "User SidekickNesDone"
+            ];
+          };
+          clear = {
+            events = [
+              "TextChangedI"
+              "BufWritePre"
+              "InsertEnter"
+            ];
+            esc = true;
+          };
+          diff = {
+            inline = "words";
+          };
+        };
+        cli = {
+          watch = true;
+          win = {
+            wo = { };
+            bo = { };
+            width = 80;
+            height = 20;
+            layout = "vertical";
+            position = "right";
+            keys = {
+              stopinsert = [
+                "<esc><esc>"
+                "stopinsert"
+                { mode = "t"; }
+              ];
+              hide_n = [
+                "q"
+                "hide"
+                { mode = "n"; }
+              ];
+              hide_t = [
+                "<c-q>"
+                "hide"
+              ];
+              win_p = [
+                "<c-w>p"
+                "blur"
+              ];
+              blur = [
+                "<c-o>"
+                "blur"
+              ];
+              prompt = [
+                "<c-p>"
+                "prompt"
+              ];
+            };
+          };
+        };
+        mux = {
+          backend = "zellij";
+          enabled = false;
+        };
+        tools = {
+          aider = {
+            cmd = [ "aider" ];
+            url = "https://github.com/Aider-AI/aider";
+          };
+          amazon_q = {
+            cmd = [ "q" ];
+            url = "https://github.com/aws/amazon-q-developer-cli";
+          };
+          claude = {
+            cmd = [ "claude" ];
+            url = "https://github.com/anthropics/claude-code";
+          };
+          codex = {
+            cmd = [
+              "codex"
+              "--search"
+            ];
+            url = "https://github.com/openai/codex";
+          };
+          copilot = {
+            cmd = [
+              "copilot"
+              "--banner"
+            ];
+            url = "https://github.com/github/copilot-cli";
+          };
+          cursor = {
+            cmd = [ "cursor-agent" ];
+            url = "https://cursor.com/cli";
+          };
+          gemini = {
+            cmd = [ "gemini" ];
+            url = "https://github.com/google-gemini/gemini-cli";
+          };
+          grok = {
+            cmd = [ "grok" ];
+            url = "https://github.com/superagent-ai/grok-cli";
+          };
+          opencode = {
+            cmd = [ "opencode" ];
+            url = "https://github.com/sst/opencode";
+          };
+          qwen = {
+            cmd = [ "qwen" ];
+            url = "https://github.com/QwenLM/qwen-code";
+          };
+        };
+        prompts = {
+          explain = "Explain this code";
+          diagnostics = {
+            msg = "What do the diagnostics in this file mean?";
+            diagnostics = true;
+          };
+          diagnostics_all = {
+            msg = "Can you help me fix these issues?";
+            diagnostics = {
+              all = true;
+            };
+          };
+          fix = {
+            msg = "Can you fix the issues in this code?";
+            diagnostics = true;
+          };
+          review = {
+            msg = "Can you review this code for any issues or improvements?";
+            diagnostics = true;
+          };
+          optimize = "How can this code be optimized?";
+          tests = "Can you write tests for this code?";
+          file = {
+            location = {
+              row = false;
+              col = false;
+            };
+            position = { };
+          };
+        };
+        debug = false;
+      };
+    };
+  };
+}