home/common/default.nix

@@ -53,4 +53,7 @@
     };
   };
   colorScheme = inputs.nix-colors.colorSchemes.dracula;
+
+  # Explicitly set new HM 26.05 default to silence legacy warning on older stateVersion.
+  programs.neovim.withRuby = lib.mkDefault false;
 }

home/features/coding/opencode.nix

@@ -1,4 +1,8 @@
-{inputs, ...}: {
+{
+  inputs,
+  lib,
+  ...
+}: {
   coding.agents.opencode = {
     enable = true;
     agentsInput = inputs.agents;
@@ -17,72 +21,6 @@
   coding.opencode = {
     enable = true;
 
-    # AZ-Gruppe LiteLLM endpoint + available models
-    extraSettings = {
-      provider = {
-        litellm = {
-          npm = "@ai-sdk/openai-compatible";
-          name = "LiteLLM (AZ-Gruppe)";
-          options.baseURL = "https://llm.az-gruppe.com/v1";
-          models = {
-            "gpt-5.2" = {
-              name = "GPT-5.2";
-              limit = {
-                context = 400000;
-                output = 128000;
-              };
-            };
-            "gpt-5.3-codex" = {
-              name = "GPT-5.3 Codex";
-              limit = {
-                context = 400000;
-                output = 128000;
-              };
-            };
-            "claude-haiku-4-5" = {
-              name = "Claude Haiku 4.5";
-              options = {
-                thinking = {
-                  type = "enabled";
-                  budget_tokens = 16000;
-                };
-              };
-              limit = {
-                context = 200000;
-                output = 64000;
-              };
-            };
-            "claude-sonnet-4-6" = {
-              name = "Claude Sonnet 4.6";
-              options = {
-                thinking = {
-                  type = "enabled";
-                  budget_tokens = 16000;
-                };
-              };
-              limit = {
-                context = 200000;
-                output = 64000;
-              };
-            };
-            "claude-opus-4-6" = {
-              name = "Claude Opus 4.6";
-              options = {
-                thinking = {
-                  type = "enabled";
-                  budget_tokens = 16000;
-                };
-              };
-              limit = {
-                context = 200000;
-                output = 128000;
-              };
-            };
-          };
-        };
-      };
-    };
-
     ohMyOpencodeSettings = {
       agents = {
         sisyphus.model = "litellm/claude-opus-4-6";
@@ -107,4 +45,82 @@
       };
     };
   };
+
+  # Keep TUI settings in programs.opencode.tui to satisfy OpenCode v1.2.15+.
+  programs.opencode.tui.theme = "opencode";
+
+  # Override legacy default settings to avoid deprecated TUI keys in settings.
+  programs.opencode.settings = lib.mkForce {
+    plugin = ["oh-my-openagent"];
+    formatter = {
+      alejandra = {
+        command = ["alejandra" "-q" "-"];
+        extensions = [".nix"];
+      };
+    };
+
+    # AZ-Gruppe LiteLLM endpoint + available models
+    provider = {
+      litellm = {
+        npm = "@ai-sdk/openai-compatible";
+        name = "LiteLLM (AZ-Gruppe)";
+        options.baseURL = "https://llm.az-gruppe.com/v1";
+        models = {
+          "gpt-5.2" = {
+            name = "GPT-5.2";
+            limit = {
+              context = 400000;
+              output = 128000;
+            };
+          };
+          "gpt-5.3-codex" = {
+            name = "GPT-5.3 Codex";
+            limit = {
+              context = 400000;
+              output = 128000;
+            };
+          };
+          "claude-haiku-4-5" = {
+            name = "Claude Haiku 4.5";
+            options = {
+              thinking = {
+                type = "enabled";
+                budget_tokens = 16000;
+              };
+            };
+            limit = {
+              context = 200000;
+              output = 64000;
+            };
+          };
+          "claude-sonnet-4-6" = {
+            name = "Claude Sonnet 4.6";
+            options = {
+              thinking = {
+                type = "enabled";
+                budget_tokens = 16000;
+              };
+            };
+            limit = {
+              context = 200000;
+              output = 64000;
+            };
+          };
+          "claude-opus-4-6" = {
+            name = "Claude Opus 4.6";
+            options = {
+              thinking = {
+                type = "enabled";
+                budget_tokens = 16000;
+              };
+            };
+            limit = {
+              context = 200000;
+              output = 128000;
+            };
+          };
+        };
+      };
+    };
+  };
 }

overlays/default.nix

@@ -27,7 +27,7 @@
 
   temp-packages = final: _prev: {
     temp = import inputs.nixpkgs-9e9486b {
-      system = final.system;
+      system = final.stdenv.hostPlatform.system;
       config.allowUnfree = true;
     };
   };