feat: initialize experimental agent repo

src/chat/models.ts

@@ -0,0 +1,28 @@
+import { config } from "../config.js";
+import {
+  getAgentModelIds,
+  parseAgentModelOptions,
+  type SupportedModel,
+} from "./modelConfig.js";
+
+export {
+  type AgentModelIcon,
+  type AgentModelOption,
+  type SupportedModel,
+} from "./modelConfig.js";
+
+export const agentModelOptions = parseAgentModelOptions(
+  config.OPENCODE_MODEL_OPTIONS,
+);
+
+export const supportedModels = getAgentModelIds(agentModelOptions);
+
+export const isSupportedModel = (model: string): model is SupportedModel =>
+  supportedModels.includes(model);
+
+export const resolveDefaultModel = (model: string): SupportedModel => {
+  if (!isSupportedModel(model)) {
+    throw new Error(`unsupported default agent model: ${model}`);
+  }
+  return model;
+};