{
  "model": "claude-sonnet-4-6",
  "max_tokens": 50,
  "messages": [
    {"role": "user", "content": "List files in src/utils"},
    {"role": "assistant", "content": [{"type": "tool_use", "id": "toolu_01", "name": "Glob", "input": {"pattern": "src/utils/*.py"}}]},
    {"role": "user", "content": [{"type": "tool_result", "tool_use_id": "toolu_01", "content": "config.py\nlogger.py\nhelpers.py\nvalidators.py\ncache.py\ndatabase.py\nauth.py\nmiddleware.py\nserializers.py\nexceptions.py\ndecorators.py\nconstants.py\ntypes.py\nutils.py\ngateway.py\nhandlers.py\nparsers.py\ngenerators.py"}]},
    {"role": "assistant", "content": "Found 18 files in src/utils/."},
    {"role": "user", "content": "Read config.py"},
    {"role": "assistant", "content": [{"type": "tool_use", "id": "toolu_02", "name": "Read", "input": {"file_path": "src/utils/config.py"}}]},
    {"role": "user", "content": [{"type": "tool_result", "tool_use_id": "toolu_02", "content": "import os\nimport sys\nimport json\nimport hashlib\nimport logging\nfrom typing import Any, Dict, List, Optional, Tuple, Union\nfrom dataclasses import dataclass, field\nfrom enum import Enum\nfrom collections import defaultdict, OrderedDict\nfrom pathlib import Path\nimport re\nimport copy\nfrom functools import reduce, lru_cache\nimport asyncio\n\nlogger = logging.getLogger(__name__)\n\nclass Environment(Enum):\n    DEVELOPMENT = \"development\"\n    STAGING = \"staging\"\n    PRODUCTION = \"production\"\n    TESTING = \"testing\"\n\nclass ConfigSource(Enum):\n    FILE = \"file\"\n    ENV_VAR = \"env_var\"\n    DEFAULT = \"default\"\n\n@dataclass\nclass DatabaseConfig:\n    host: str = \"localhost\"\n    port: int = 5432\n    name: str = \"myapp\"\n    user: str = \"postgres\"\n    password: str = \"\"\n    pool_size: int = 10\n    max_overflow: int = 20\n    connect_timeout: int = 5\n    statement_timeout: int = 30\n    echo: bool = False\n    ssl_mode: str = \"prefer\"\n    ssl_cert_path: Optional[str] = None\n    ssl_key_path: Optional[str] = None\n    ssl_ca_path: Optional[str] = None\n    replication: Optional[Dict[str, Any]] = None\n\n@dataclass\nclass CacheConfig:\n    backend: str = \"redis\"\n    host: str = \"localhost\"\n    port: int = 6379\n    db: int = 0\n    password: Optional[str] = None\n    max_connections: int = 50\n    socket_timeout: float = 5.0\n    socket_connect_timeout: float = 3.0\n    retry_on_timeout: bool = True\n    ttl: int = 3600\n    default_prefix: str = \"myapp:\"\n    serializer: str = \"json\"\n    compression: bool = True\n    compression_threshold: int = 1024\n    compression_level: int = 6\n\n@dataclass\nclass SecurityConfig:\n    secret_key: str = \"\"\n    algorithm: str = \"HS256\"\n    access_token_ttl: int = 900\n    refresh_token_ttl: int = 2592000\n    password_min_length: int = 8\n    password_require_uppercase: bool = True\n    password_require_lowercase: bool = True\n    password_require_digit: bool = True\n    password_require_special: bool = False\n    bcrypt_rounds: int = 12\n    cors_origins: List[str] = field(default_factory=list)\n    cors_allow_credentials: bool = True\n    cors_max_age: int = 3600\n    rate_limit_per_minute: int = 60\n    rate_limit_burst: int = 10\n    csrf_enabled: bool = True\n    session_ttl: int = 86400\n    max_login_attempts: int = 5\n    lockout_duration: int = 900\n    mfa_enabled: bool = False\n    mfa_issuer: str = \"myapp\"\n    encryption_key: Optional[str] = None\n    allowed_algorithms: List[str] = field(default_factory=lambda: [\"AES-256-GCM\", \"ChaCha20-Poly1305\"])\n\n@dataclass\nclass APIConfig:\n    title: str = \"My Application\"\n    version: str = \"1.0.0\"\n    description: str = \"\"\n    root_path: str = \"/api/v1\"\n    docs_url: str = \"/docs\"\n    openapi_url: str = \"/openapi.json\"\n    pagination_default_limit: int = 20\n    pagination_max_limit: int = 100\n    pagination_page_size: int = 20\n    rate_limit: int = 100\n    throttle_burst: int = 50\n    response_timeout: int = 30\n    request_timeout: int = 60\n    allowed_origins: List[str] = field(default_factory=list)\n    middleware_order: List[str] = field(default_factory=lambda: [\"cors\", \"auth\", \"rate_limit\", \"logging\", \"request_id\", \"timing\"])\n    enable_docs: bool = True\n    enable_compression: bool = True\n    compression_min_size: int = 1024\n    compression_level: int = 6\n    include_server_timing: bool = False\n\n@dataclass\nclass LoggingConfig:\n    level: str = \"INFO\"\n    format_string: str = \"%(asctime)s - %(name)s - %(levelname)s - %(message)s\"\n    date_format: str = \"%Y-%m-%d %H:%M:%S\"\n    handlers: List[str] = field(default_factory=lambda: [\"console\", \"file\"])\n    file_path: str = \"logs/app.log\"\n    max_file_size: int = 10485760\n    backup_count: int = 5\n    rotation: str = \"size\"\n    json_format: bool = True\n    include_caller: bool = False\n    include_stacktrace: bool = True\n    propagate: bool = False\n    filter_patterns: List[str] = field(default_factory=list)\n    sensitive_keys: List[str] = field(default_factory=lambda: [\"password\", \"secret\", \"token\", \"api_key\", \"credit_card\"])\n\n@dataclass\nclass ApplicationConfig:\n    env: Environment = Environment.DEVELOPMENT\n    source: ConfigSource = ConfigSource.DEFAULT\n    name: str = \"myapp\"\n    version: str = \"1.0.0\"\n    debug: bool = False\n    host: str = \"0.0.0.0\"\n    port: int = 8000\n    workers: int = 4\n    database: DatabaseConfig = field(default_factory=DatabaseConfig)\n    cache: CacheConfig = field(default_factory=CacheConfig)\n    security: SecurityConfig = field(default_factory=SecurityConfig)\n    api: APIConfig = field(default_factory=APIConfig)\n    logging_config: LoggingConfig = field(default_factory=LoggingConfig)\n    extra: Dict[str, Any] = field(default_factory=dict)\n\n    def validate(self) -> Tuple[bool, List[str]]:\n        errors = []\n        if not self.name:\n            errors.append(\"name is required\")\n        if self.port < 1 or self.port > 65535:\n            errors.append(\"port out of range\")\n        if self.security.secret_key and len(self.security.secret_key) < 32:\n            errors.append(\"secret_key too short\")\n        return len(errors) == 0, errors\n\n    def merge(self, other: \"ApplicationConfig\") -> \"ApplicationConfig\":\n        merged = copy.deepcopy(self)\n        for fld in fields(self):\n            val = getattr(other, fld.name)\n            if val is not None:\n                setattr(merged, fld.name, val)\n        return merged\n\n    def to_dict(self) -> Dict[str, Any]:\n        return asdict(self)\n\n    def to_json(self, indent: int = 2) -> str:\n        return json.dumps(self.to_dict(), indent=indent)\n\n    def save(self, path: str) -> None:\n        Path(path).parent.mkdir(parents=True, exist_ok=True)\n        with open(path, \"w\") as f:\n            f.write(self.to_json())\n\n    @classmethod\n    def load(cls, path: str) -> \"ApplicationConfig\":\n        with open(path, \"r\") as f:\n            data = json.load(f)\n        return cls(**data)\n\n    def __post_init__(self):\n        if self.debug:\n            logger.setLevel(logging.DEBUG)\n        if not self.name:\n            raise ValueError(\"name is required\")\n\n    def get_database_url(self) -> str:\n        return f\"postgresql://{self.database.user}:{self.database.password}@{self.database.host}:{self.database.port}/{self.database.name}\"\n\n    def get_cache_url(self) -> str:\n        return f\"redis://{self.cache.host}:{self.cache.port}/{self.cache.db}\""}]},
    {"role": "assistant", "content": "config.py defines a hierarchical config system with Environment, ConfigSource enums and DatabaseConfig, CacheConfig, SecurityConfig, APIConfig, LoggingConfig, ApplicationConfig dataclasses. The config supports JSON/env loading, validation, merge, and serialization."},
    {"role": "user", "content": "Read helpers.py and tell me what utility functions it provides"},
    {"role": "assistant", "content": [{"type": "tool_use", "id": "toolu_03", "name": "Read", "input": {"file_path": "src/utils/helpers.py"}}]},
    {"role": "user", "content": [{"type": "tool_result", "tool_use_id": "toolu_03", "content": "import os\nimport re\nimport json\nimport uuid\nimport hashlib\nimport hmac\nimport time\nimport base64\nimport math\nfrom datetime import datetime, timedelta, timezone\nfrom typing import Any, Dict, List, Optional, Tuple, Union, Callable\nfrom functools import wraps, lru_cache, reduce\nfrom itertools import chain, combinations, islice\n\ndef generate_uuid() -> str:\n    return str(uuid.uuid4())\n\ndef hash_password(password: str, salt: Optional[str] = None) -> Tuple[str, str]:\n    salt = salt or os.urandom(32).hex()\n    hashed = hashlib.pbkdf2_hmac(\"sha256\", password.encode(), salt.encode(), 100000)\n    return hashed.hex(), salt\n\ndef verify_password(password: str, hashed: str, salt: str) -> bool:\n    candidate = hashlib.pbkdf2_hmac(\"sha256\", password.encode(), salt.encode(), 100000)\n    return hmac.compare_digest(candidate.hex(), hashed)\n\ndef generate_token(length: int = 32) -> str:\n    return base64.urlsafe_b64encode(os.urandom(length)).decode().rstrip(\"=\")\n\ndef sanitize_string(s: str, max_length: int = 1000) -> str:\n    s = re.sub(r\"<script[^>]*>.*?</script>\", \"\", s, flags=re.IGNORECASE)\n    s = re.sub(r\"on\\w+\\s*=\", \"\", s, flags=re.IGNORECASE)\n    return s[:max_length]\n\ndef format_bytes(size: int) -> str:\n    for unit in [\"B\", \"KB\", \"MB\", \"GB\", \"TB\"]:\n        if size < 1024:\n            return f\"{size:.1f} {unit}\"\n        size /= 1024\n    return f\"{size:.1f} PB\"\n\ndef truncate(s: str, max_length: int = 100, suffix: str = \"...\") -> str:\n    return s[:max_length] + suffix if len(s) > max_length else s\n\ndef chunk_list(lst: List[Any], chunk_size: int) -> List[List[Any]]:\n    return [lst[i:i + chunk_size] for i in range(0, len(lst), chunk_size)]\n\ndef flatten(nested: List[Any]) -> List[Any]:\n    return list(chain.from_iterable(nested))\n\ndef deep_merge(base: Dict, override: Dict) -> Dict:\n    result = copy.deepcopy(base)\n    for key, value in override.items():\n        if key in result and isinstance(result[key], dict) and isinstance(value, dict):\n            result[key] = deep_merge(result[key], value)\n        else:\n            result[key] = value\n    return result\n\ndef parse_datetime(s: str, formats: Optional[List[str]] = None) -> Optional[datetime]:\n    formats = formats or [\"%Y-%m-%d\", \"%Y-%m-%dT%H:%M:%S\", \"%Y-%m-%d %H:%M:%S\"]\n    for fmt in formats:\n        try:\n            return datetime.strptime(s, fmt)\n        except ValueError:\n            continue\n    return None\n\ndef is_valid_email(email: str) -> bool:\n    pattern = r\"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$\"\n    return bool(re.match(pattern, email))\n\ndef is_valid_url(url: str) -> bool:\n    pattern = r\"^https?://[^\\s<>\\\"]+$\"\n    return bool(re.match(pattern, url))\n\ndef mask_sensitive(data: Dict[str, Any], keys: List[str]) -> Dict[str, Any]:\n    masked = {}\n    for k, v in data.items():\n        if k in keys:\n            masked[k] = \"***REDACTED***\"\n        elif isinstance(v, dict):\n            masked[k] = mask_sensitive(v, keys)\n        else:\n            masked[k] = v\n    return masked\n\ndef calculate_checksum(data: str, algorithm: str = \"sha256\") -> str:\n    h = hashlib.new(algorithm)\n    h.update(data.encode())\n    return h.hexdigest()\n\ndef paginate(items: List[Any], page: int, per_page: int) -> Dict[str, Any]:\n    start = (page - 1) * per_page\n    end = start + per_page\n    total = len(items)\n    return {\n        \"items\": items[start:end],\n        \"page\": page,\n        \"per_page\": per_page,\n        \"total\": total,\n        \"pages\": math.ceil(total / per_page),\n        \"has_next\": end < total,\n        \"has_prev\": page > 1\n    }\n\ndef slugify(text: str) -> str:\n    text = text.lower().strip()\n    text = re.sub(r\"[^a-z0-9\\s-]\", \"\", text)\n    text = re.sub(r\"[\\s-]+\", \"-\", text)\n    return text[:200]\n\ndef clamp(value: float, min_val: float, max_val: float) -> float:\n    return max(min_val, min(value, max_val))\n\ndef group_by(items: List[Any], key_fn: Callable) -> Dict[Any, List[Any]]:\n    from collections import defaultdict\n    result = defaultdict(list)\n    for item in items:\n        result[key_fn(item)].append(item)\n    return dict(result)"}]},
    {"role": "assistant", "content": "helpers.py provides utility functions for UUID generation, password hashing with PBKDF2, token generation, string sanitization, byte formatting, truncation, list chunking, flattening, deep dict merging, datetime parsing, email/URL validation, sensitive data masking, checksum calculation, pagination, text slugification, value clamping, and grouping."},
    {"role": "user", "content": "Summarize config.py and helpers.py together"}
  ]
}