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52a4f3c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 | """
Claude API wrapper for the Chess Master agent (fallback).
Handles:
- Structured JSON output via response_format
- Tool use / function calling
- Error handling and retries
- Configuration from settings
"""
import json
import asyncio
import logging
from typing import Optional, Dict, Any
import anthropic
from anthropic import APIError, RateLimitError
from config.settings import CLAUDE_API_KEY, CLAUDE_MODEL
logger = logging.getLogger(__name__)
class ClaudeClient:
"""
Claude API client for Chess Master agent (fallback to Gemini).
Supports:
- Structured JSON output
- Tool use / function calling
- Automatic retries with exponential backoff
"""
def __init__(
self,
api_key: Optional[str] = None,
model: Optional[str] = None,
temperature: float = 0.8,
max_tokens: int = 1024,
max_retries: int = 3,
):
"""
Initialize Claude client.
Args:
api_key: Claude API key (defaults to CLAUDE_API_KEY from config)
model: Model name (defaults to CLAUDE_MODEL from config)
temperature: Sampling temperature (0.0-1.0)
max_tokens: Maximum tokens in response
max_retries: Number of retries on failure
"""
self.api_key = api_key or CLAUDE_API_KEY
self.model = model or CLAUDE_MODEL
self.temperature = temperature
self.max_tokens = max_tokens
self.max_retries = max_retries
if not self.api_key:
raise ValueError("CLAUDE_API_KEY not set in environment or config")
self.client = anthropic.Anthropic(api_key=self.api_key)
self.call_count = 0
self.error_count = 0
async def respond(
self,
system_prompt: str,
user_prompt: str,
player_id: Optional[str] = None,
) -> Dict[str, Any]:
"""
Generate a response from Claude with structured JSON output.
Args:
system_prompt: System context and personality
user_prompt: User input/game context
player_id: Optional player ID for context
Returns:
Parsed JSON response with action, content, tone, etc.
"""
self.call_count += 1
for attempt in range(self.max_retries):
try:
logger.debug(f"Claude API call #{self.call_count}, attempt {attempt + 1}")
loop = asyncio.get_running_loop()
response = await loop.run_in_executor(
None,
lambda: self.client.messages.create(
model=self.model,
max_tokens=self.max_tokens,
temperature=self.temperature,
system=system_prompt,
messages=[{"role": "user", "content": user_prompt}],
)
)
# Parse response
response_text = response.content[0].text
parsed = self._parse_response(response_text)
logger.info(f"Claude response: action={parsed.get('action')}")
return parsed
except (RateLimitError, APIError) as e:
self.error_count += 1
logger.warning(f"Claude API error (attempt {attempt + 1}/{self.max_retries}): {e}")
if attempt < self.max_retries - 1:
wait_time = 2 ** attempt
logger.debug(f"Retrying in {wait_time}s...")
await asyncio.sleep(wait_time)
else:
logger.error(f"Failed after {self.max_retries} attempts")
raise
except json.JSONDecodeError as e:
self.error_count += 1
logger.error(f"Failed to parse JSON response: {e}")
raise
raise RuntimeError("All retries exhausted")
def _build_full_prompt(self, system_prompt: str, user_prompt: str) -> str:
"""
Combine system and user prompts with JSON instruction.
"""
return f"""{user_prompt}
---
IMPORTANT: You must respond ONLY with valid JSON. No markdown, no extra text.
The JSON must have this structure:
{{
"thinking": "optional pre-response reasoning",
"action": "send_message | stop | save_memory | set_emotion",
"content": "the message, memory content, or emotion",
"tone": "optional tone indicator",
"metadata": {{optional additional context}}
}}
Required fields: action, content
Optional fields: thinking, tone, metadata
Examples:
{{"action": "send_message", "content": "Nice move.", "tone": "respectful"}}
{{"action": "save_memory", "content": "Alice always plays the Sicilian", "memory_type": "player_behavior"}}
{{"action": "stop"}}
"""
def _parse_response(self, response_text: str) -> Dict[str, Any]:
"""
Parse Claude's JSON response.
Handles:
- Extracting JSON from markdown code blocks
- Validating required fields
- Type conversion
"""
text = response_text.strip()
# Try to extract JSON from markdown code block
if text.startswith("```"):
lines = text.split("\n")
json_lines = [l for l in lines[1:] if l and not l.startswith("```")]
text = "\n".join(json_lines)
# Parse JSON
try:
parsed = json.loads(text)
except json.JSONDecodeError:
logger.error(f"Invalid JSON response: {text[:200]}")
raise
# Validate required fields
if "action" not in parsed:
raise ValueError(f"Missing 'action' field in response: {parsed}")
if "content" not in parsed and parsed.get("action") != "stop":
raise ValueError(f"Missing 'content' field in response: {parsed}")
# Ensure action is valid
valid_actions = ["send_message", "stop", "save_memory", "set_emotion"]
if parsed["action"] not in valid_actions:
raise ValueError(f"Invalid action '{parsed['action']}'. Must be one of: {valid_actions}")
# Set defaults
if "tone" not in parsed:
parsed["tone"] = None
if "metadata" not in parsed:
parsed["metadata"] = {}
return parsed
def get_stats(self) -> Dict[str, Any]:
"""Get API call statistics."""
return {
"total_calls": self.call_count,
"total_errors": self.error_count,
"error_rate": self.error_count / self.call_count if self.call_count > 0 else 0,
}
def reset_stats(self) -> None:
"""Reset API statistics."""
self.call_count = 0
self.error_count = 0
__all__ = ["ClaudeClient"]
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