diff --git a/packages/opencode/src/session/system.ts b/packages/opencode/src/session/system.ts
index cd08986de62..fa9c126aa57 100644
--- a/packages/opencode/src/session/system.ts
+++ b/packages/opencode/src/session/system.ts
@@ -34,6 +34,23 @@ export namespace SystemPrompt {
   // kilocode_change end
 
   export function provider(model: Provider.Model) {
+    // kilocode_change start
+    switch (model.prompt) {
+      case "anthropic":
+        return [PROMPT_ANTHROPIC]
+      case "anthropic_without_todo":
+        return [PROMPT_DEFAULT]
+      case "beast":
+        return [PROMPT_BEAST]
+      case "codex":
+        return [PROMPT_CODEX]
+      case "gemini":
+        return [PROMPT_GEMINI]
+      case "trinity":
+        return [PROMPT_TRINITY]
+    }
+    // kilocode_change end
+
     if (model.api.id.includes("gpt-4") || model.api.id.includes("o1") || model.api.id.includes("o3"))
       return [PROMPT_BEAST]
     if (model.api.id.includes("gpt")) {