Update src/agents/index.ts

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

src/agents/index.ts

@@ -162,6 +162,7 @@ function applyOverrides(
       // into the OpenCode config too. An explicit agent-level variant below
       // intentionally takes precedence.
       if (
+        agent.name !== 'orchestrator' &&
         override.variant === undefined &&
         primaryModel.variant !== undefined
       ) {