feat(opencode-go): integrate into model fallback chain resolution

src/cli/model-fallback.ts

@@ -33,8 +33,8 @@ export function generateModelConfig(config: InstallConfig): GeneratedOmoConfig {
     avail.opencodeZen ||
     avail.copilot ||
     avail.zai ||
-    avail.kimiForCoding
-
+    avail.kimiForCoding ||
+    avail.opencodeGo
   if (!hasAnyProvider) {
     return {
       $schema: SCHEMA_URL,
@@ -53,8 +53,12 @@ export function generateModelConfig(config: InstallConfig): GeneratedOmoConfig {
   const categories: Record<string, CategoryConfig> = {}
 
   for (const [role, req] of Object.entries(CLI_AGENT_MODEL_REQUIREMENTS)) {
-    if (role === "librarian" && avail.zai) {
-      agents[role] = { model: ZAI_MODEL }
+    if (role === "librarian") {
+      if (avail.opencodeGo) {
+        agents[role] = { model: "opencode-go/minimax-m2.5" }
+      } else if (avail.zai) {
+        agents[role] = { model: ZAI_MODEL }
+      }
       continue
     }
 
@@ -63,6 +67,8 @@ export function generateModelConfig(config: InstallConfig): GeneratedOmoConfig {
         agents[role] = { model: "anthropic/claude-haiku-4-5" }
       } else if (avail.opencodeZen) {
         agents[role] = { model: "opencode/claude-haiku-4-5" }
+      } else if (avail.opencodeGo) {
+        agents[role] = { model: "opencode-go/minimax-m2.5" }
       } else if (avail.copilot) {
         agents[role] = { model: "github-copilot/gpt-5-mini" }
       } else {