fix(cli): respect -m flag over agent model config

packages/opencode/src/cli/cmd/tui/context/local.tsx

@@ -21,16 +21,26 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
     const sdk = useSDK()
     const toast = useToast()
 
-    function isModelValid(model: { providerID: string; modelID: string }) {
+    function isModelValid(model: { providerID: string; modelID: string }, allowUncached = false) {
       const provider = sync.data.provider.find((x) => x.id === model.providerID)
-      return !!provider?.models[model.modelID]
+      if (!provider) return false
+      // If model exists in cache, it's valid
+      if (provider.models[model.modelID]) return true
+      // If allowUncached is true (for CLI-provided models), accept it even if not in cache
+      return allowUncached
     }
 
-    function getFirstValidModel(...modelFns: (() => { providerID: string; modelID: string } | undefined)[]) {
+    function getFirstValidModel(
+      ...modelFns: (() => { providerID: string; modelID: string; allowUncached?: boolean } | undefined)[]
+    ) {
       for (const modelFn of modelFns) {
         const model = modelFn()
         if (!model) continue
-        if (isModelValid(model)) return model
+        if (isModelValid(model, model.allowUncached ?? false)) {
+          // Strip allowUncached from returned model to match expected type
+          const { providerID, modelID } = model
+          return { providerID, modelID }
+        }
       }
     }
 
@@ -192,8 +202,24 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
 
       const currentModel = createMemo(() => {
         const a = agent.current()
+        const args = useArgs()
+
+        // FIX: Include CLI -m flag in model resolution chain
+        // This allows custom providers like openrouter/* to work even if not in cache
+        const cliModel = args.model
+          ? (() => {
+              const { providerID, modelID } = Provider.parseModel(args.model)
+              if (providerID && modelID) {
+                // Mark CLI-provided models to skip strict cache validation
+                return { providerID, modelID, allowUncached: true }
+              }
+              return undefined
+            })()
+          : undefined
+
         return (
           getFirstValidModel(
+            () => cliModel,  // CLI -m flag takes precedence
             () => modelStore.model[a.name],
             () => a.model,
             fallbackModel,