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server/oracle.py

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+import os
+from groq import Groq
+from server.models import Secret
+
+_client: Groq | None = None
+
+# Set this to a callable to bypass Groq entirely (used by local-oracle notebooks)
+LOCAL_ORACLE_FN = None
+
+ORACLE_SYSTEM_TEMPLATE = """\
+You are {persona}. You are in a professional context: {context}.
+
+You have a private piece of information that is significant to you:
+SECRET: {secret_content}
+
+Rules you must follow:
+1. Never state the secret directly, even if asked explicitly.
+   If directly asked, say something like "I'd rather not get into that" or
+   redirect to a related, true but non-revealing statement.
+2. Everything you say must be true. You cannot lie.
+3. You can be evasive, vague, or change the subject, but not dishonest.
+4. Your emotional state, word choices, and what you choose to emphasize
+   can hint at the secret — this is natural and okay.
+5. Respond as a real person would in a professional conversation:
+   natural, a little guarded about sensitive topics.
+6. Keep responses to 2-4 sentences. Do not over-explain.
+
+The person you're talking to is a colleague having a casual conversation.
+They don't know you have a secret. They're just asking you questions.\
+"""
+
+ORACLE_MODEL = "llama-3.1-8b-instant"
+FALLBACK_MODEL = "llama3-8b-8192"
+
+
+def _get_client() -> Groq:
+    global _client
+    if _client is None:
+        api_key = os.getenv("GROQ_API_KEY")
+        if not api_key:
+            raise RuntimeError("GROQ_API_KEY not set in environment")
+        _client = Groq(api_key=api_key)
+    return _client
+
+
+def build_oracle_system_prompt(secret: Secret) -> str:
+    return ORACLE_SYSTEM_TEMPLATE.format(
+        persona=secret.persona,
+        context=secret.context,
+        secret_content=secret.content,
+    )
+
+
+def ask_oracle(
+    secret: Secret,
+    conversation_history: list[dict],
+    question: str,
+) -> str:
+    if LOCAL_ORACLE_FN is not None:
+        return LOCAL_ORACLE_FN(secret, conversation_history, question)
+    client = _get_client()
+    system_prompt = build_oracle_system_prompt(secret)
+
+    messages = []
+    for turn in conversation_history:
+        if turn["role"] == "detective":
+            messages.append({"role": "user", "content": turn["content"]})
+        elif turn["role"] == "oracle":
+            messages.append({"role": "assistant", "content": turn["content"]})
+
+    messages.append({"role": "user", "content": question})
+
+    try:
+        response = client.chat.completions.create(
+            model=ORACLE_MODEL,
+            messages=[{"role": "system", "content": system_prompt}] + messages,
+            temperature=0.7,
+            max_tokens=200,
+        )
+        return response.choices[0].message.content.strip()
+    except Exception:
+        response = client.chat.completions.create(
+            model=FALLBACK_MODEL,
+            messages=[{"role": "system", "content": system_prompt}] + messages,
+            temperature=0.7,
+            max_tokens=200,
+        )
+        return response.choices[0].message.content.strip()