Add opencode config

modules/home/opencode.nix

@@ -0,0 +1,68 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.dot.llm.opencode;
+in
+{
+  options.dot.llm.opencode = {
+    enableConfig = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Enable managed OpenCode configuration with sops-nix secrets";
+    };
+  };
+
+  config = lib.mkIf cfg.enableConfig {
+    # Declare the sops secret
+    sops.secrets.langdock-api-key = {
+      # Uses defaultSopsFile from secrets.nix
+    };
+
+    # Create the OpenCode config.json template with secret substitution
+    sops.templates."opencode/config.json" = {
+      content = builtins.toJSON {
+        "$schema" = "https://opencode.ai/config.json";
+        model = "anthropic/claude-sonnet-4-5-20250929";
+        small_model = "anthropic/claude-haiku-4-5-20251001";
+        provider = {
+          langdock-openai = {
+            npm = "@ai-sdk/openai-compatible";
+            name = "Langdock OpenAI";
+            options = {
+              baseURL = "https://api.langdock.com/openai/eu/v1";
+              apiKey = config.sops.placeholder.langdock-api-key;
+            };
+            models = {
+              "gpt-5.2" = { name = "GPT-5.2"; };
+              "gpt-4.1" = { name = "GPT-4.1"; };
+              "gpt-5-mini" = { name = "GPT-5 mini"; };
+            };
+          };
+          anthropic = {
+            options = {
+              baseURL = "https://api.langdock.com/anthropic/eu/v1";
+              apiKey = config.sops.placeholder.langdock-api-key;
+            };
+            models = {
+              "Opus 4.6" = { name = "opus-4.6-default"; };
+            };
+          };
+          ollama = {
+            npm = "@ai-sdk/openai-compatible";
+            name = "Ollama (Local)";
+            options = {
+              baseURL = "http://192.168.11.23:11434/v1";
+            };
+            models = {
+              "qwen3-coder:30b" = { name = "Qwen 3 Coder 30B"; };
+              "codellama:34b-instruct" = { name = "CodeLlama 34B Instruct"; };
+            };
+          };
+        };
+      };
+    };
+
+    # Link the generated config to the expected location
+    xdg.configFile."opencode/config.json".source = config.sops.templates."opencode/config.json".path;
+  };
+}