# Prompts as code — Git'te
# prompts/v1/customer_support.txt
# prompts/v2/customer_support.txt
 
class PromptRegistry:
    def __init__(self):
        self.versions = {}
 
    def register(self, name: str, version: str, content: str):
        self.versions[(name, version)] = {
            "content": content,
            "deployed_at": datetime.now(),
            "hash": hashlib.sha256(content.encode()).hexdigest()[:8]
        }
 
    def get(self, name: str, version: str = "latest") -> str:
        ...
 
# Her LLM çağrısında log:
log_event({
    "prompt_name": "customer_support",
    "prompt_version": "v3.1",
    "prompt_hash": "abc12345",
    "input": ..., "output": ..., "metrics": ...
})

import hashlib
 
def assign_variant(user_id: str, experiment: str, variants: list[str]) -> str:
    # Deterministik hash → kullanıcı her zaman aynı variant'ta
    h = int(hashlib.md5(f"{experiment}-{user_id}".encode()).hexdigest(), 16)
    return variants[h % len(variants)]
 
# Kullanım
variant = assign_variant("user_123", "support_prompt_v3", ["v3.0", "v3.1"])
prompt = registry.get("customer_support", variant)
response = llm(prompt + user_msg)
 
# Log
log({
    "experiment": "support_prompt_v3",
    "variant": variant,
    "metrics": {"resolution_rate": ?, "csat": ?, "latency": ?}
})