Create llm_sim.py

llm_sim.py

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+"""
+Toy LLM plug-ins for offline demos.
+Each provider exposes a .generate(prompt) method.
+Extend or swap with real API wrappers later.
+"""
+
+class BaseToyLLM:
+    name = "base"
+    def generate(self, prompt: str) -> str:
+        return f"[{self.name}] echo: {prompt[:60]}..."
+
+class GPTToy(BaseToyLLM):
+    name = "gpt-toy"
+    def generate(self, prompt):      # pretend “smart”
+        return "[GPT-Toy] ➜ I understand and comply."
+
+class ClaudeToy(BaseToyLLM):
+    name = "claude-toy"
+    def generate(self, prompt):
+        return "[Claude-Toy] ➜ Here’s a thoughtful answer."
+
+class MistralToy(BaseToyLLM):
+    name = "mistral-toy"
+    def generate(self, prompt):
+        return "[Mistral-Toy] ➜ Crisp, minimal reply."
+
+# Registry of available toy providers
+LLM_REGISTRY = {
+    "gpt": GPTToy(),
+    "claude": ClaudeToy(),
+    "mistral": MistralToy(),
+}