add llm pool & judge panel config

src/lightspeed_evaluation/core/models/__init__.py

@@ -18,7 +18,9 @@
     APIConfig,
     CoreConfig,
     EmbeddingConfig,
+    JudgePanelConfig,
     LLMConfig,
+    LLMPoolConfig,
     LoggingConfig,
     OutputConfig,
     SystemConfig,
@@ -35,7 +37,9 @@
     "EvaluationScope",
     # System config models
     "CoreConfig",
+    "JudgePanelConfig",
     "LLMConfig",
+    "LLMPoolConfig",
     "EmbeddingConfig",
     "APIConfig",
     "OutputConfig",

src/lightspeed_evaluation/core/models/system.py

@@ -5,6 +5,7 @@
 
 from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator
 
+from lightspeed_evaluation.core.system.exceptions import ConfigurationError
 from lightspeed_evaluation.core.constants import (
     DEFAULT_API_BASE,
     DEFAULT_API_CACHE_DIR,
@@ -318,6 +319,289 @@ class CoreConfig(BaseModel):
     )
 
 
+class LLMParametersConfig(BaseModel):
+    """Dynamic parameters passed to LLM API calls.
+
+    These parameters are passed directly to the LLM provider.
+    All fields are optional - unset fields inherit from parent level.
+    Uses extra="allow" to pass through any provider-specific parameters.
+    """
+
+    model_config = ConfigDict(extra="allow")
+
+    temperature: Optional[float] = Field(
+        default=None,
+        ge=0.0,
+        le=2.0,
+        description="Sampling temperature",
+    )
+    max_completion_tokens: Optional[int] = Field(
+        default=None,
+        ge=1,
+        description="Maximum tokens in response",
+    )
+
+    def to_dict(self, exclude_none: bool = True) -> dict[str, Any]:
+        """Convert parameters to dict for passing to LLM.
+
+        Args:
+            exclude_none: If True, exclude None values from output
+
+        Returns:
+            Dict of parameters ready for LLM API call
+        """
+        params = self.model_dump()
+        if exclude_none:
+            return {k: v for k, v in params.items() if v is not None}
+        return params
+
+
+class LLMDefaultsConfig(BaseModel):
+    """Global default settings for all LLMs in the pool.
+
+    These are shared defaults that apply to all LLMs unless overridden
+    at the provider or model level.
+    """
+
+    model_config = ConfigDict(extra="forbid")
+
+    cache_enabled: bool = Field(
+        default=True,
+        description="Is caching of LLM queries enabled?",
+    )
+    cache_dir: str = Field(
+        default=DEFAULT_LLM_CACHE_DIR,
+        min_length=1,
+        description="Base cache directory",
+    )
+
+    timeout: int = Field(
+        default=DEFAULT_API_TIMEOUT,
+        ge=1,
+        description="Request timeout in seconds",
+    )
+
+    num_retries: int = Field(
+        default=DEFAULT_LLM_RETRIES,
+        ge=0,
+        description="Retry attempts for failed requests",
+    )
+
+    # Default dynamic parameters
+    parameters: LLMParametersConfig = Field(
+        default_factory=lambda: LLMParametersConfig(
+            temperature=DEFAULT_LLM_TEMPERATURE,
+            max_completion_tokens=DEFAULT_LLM_MAX_TOKENS,
+        ),
+        description="Default dynamic parameters for LLM calls",
+    )
+
+
+class LLMProviderConfig(BaseModel):
+    """Configuration for a single LLM provider/model in the pool.
+
+    Contains model-specific settings. Cache and retry settings are managed
+    at the pool defaults level, not per-model.
+
+    The dict key is the unique model ID used for referencing.
+    """
+
+    model_config = ConfigDict(extra="forbid")
+
+    # Required: Provider type
+    provider: str = Field(
+        min_length=1,
+        description="Provider type (e.g., openai, watsonx, gemini, hosted_vllm)",
+    )
+
+    # Model identity (optional - defaults to dict key)
+    model: Optional[str] = Field(
+        default=None,
+        min_length=1,
+        description="Actual model name. If not set, uses the dict key as model name.",
+    )
+
+    # SSL settings (optional - inherit from defaults or use system defaults)
+    ssl_verify: Optional[bool] = Field(
+        default=None,
+        description="Verify SSL certificates. Inherits from defaults if not set.",
+    )
+    ssl_cert_file: Optional[str] = Field(
+        default=None,
+        description="Path to custom CA certificate file",
+    )
+
+    # API endpoint/key configuration (optional - falls back to environment variable)
+    api_base: Optional[str] = Field(
+        default=None,
+        min_length=1,
+        description=(
+            "Base URL for the API endpoint. "
+            "If not set, falls back to provider-specific environment variable."
+        ),
+    )
+    api_key_path: Optional[str] = Field(
+        default=None,
+        min_length=1,
+        description=(
+            "Path to text file containing the API key for this model. "
+            "If not set, falls back to provider-specific environment variable."
+        ),
+    )
+
+    # Dynamic parameters (passed to LLM API)
+    parameters: LLMParametersConfig = Field(
+        default_factory=LLMParametersConfig,
+        description="Dynamic parameters for this model (merged with defaults)",
+    )
+
+    # Timeout can be model-specific (some models are slower)
+    timeout: Optional[int] = Field(
+        default=None,
+        ge=1,
+        description="Override timeout for this model",
+    )
+
+
+class LLMPoolConfig(BaseModel):
+    """Pool of LLM configurations for reuse across the system.
+
+    Provides a centralized place to define all LLM configurations,
+    which can be referenced by judge_panel, agents, or other components.
+
+    Cache and retry settings are managed at the defaults level only.
+    Model entries contain model-specific settings (provider, parameters, SSL).
+    """
+
+    model_config = ConfigDict(extra="forbid")
+
+    defaults: LLMDefaultsConfig = Field(
+        default_factory=LLMDefaultsConfig,
+        description="Global default settings for all LLMs (cache, retry, parameters)",
+    )
+    models: dict[str, LLMProviderConfig] = Field(
+        default_factory=dict,
+        description="Model configurations. Key is unique model ID for referencing.",
+    )
+
+    def get_model_ids(self) -> list[str]:
+        """Get all available model IDs."""
+        return list(self.models.keys())
+
+    def resolve_llm_config(
+        self, model_id: str, cache_suffix: Optional[str] = None
+    ) -> LLMConfig:
+        """Resolve a model ID to a fully configured LLMConfig.
+
+        Resolution order: defaults -> model entry (for model-specific fields)
+
+        Args:
+            model_id: Model identifier (key in models dict)
+            cache_suffix: Optional suffix for cache directory (e.g., "judge_0")
+
+        Returns:
+            Fully resolved LLMConfig
+
+        Raises:
+            ValueError: If model_id not found
+        """
+        if model_id not in self.models:
+            raise ValueError(
+                f"Model '{model_id}' not found in llm_pool.models. "
+                f"Available: {list(self.models.keys())}"
+            )
+        entry = self.models[model_id]
+
+        # Merge parameters: defaults -> model entry
+        merged_params: dict[str, Any] = {}
+        merged_params.update(self.defaults.parameters.to_dict(exclude_none=True))
+        merged_params.update(entry.parameters.to_dict(exclude_none=True))
+
+        # Build cache_dir from defaults with model-specific suffix
+        suffix = cache_suffix if cache_suffix else model_id
+        cache_dir = os.path.join(self.defaults.cache_dir, suffix)
+
+        return LLMConfig(
+            provider=entry.provider,
+            model=entry.model or model_id,
+            temperature=merged_params.get("temperature", DEFAULT_LLM_TEMPERATURE),
+            max_tokens=merged_params.get(
+                "max_completion_tokens", DEFAULT_LLM_MAX_TOKENS
+            ),
+            timeout=(
+                entry.timeout if entry.timeout is not None else self.defaults.timeout
+            ),
+            num_retries=self.defaults.num_retries,
+            ssl_verify=(
+                entry.ssl_verify if entry.ssl_verify is not None else DEFAULT_SSL_VERIFY
+            ),
+            ssl_cert_file=entry.ssl_cert_file,
+            cache_enabled=self.defaults.cache_enabled,
+            cache_dir=cache_dir,
+            # Note: api_base and api_key_path are not propagated yet - requires LLMConfig extension
+        )
+
+
+class JudgePanelConfig(BaseModel):
+    """Judge panel configuration for multi-LLM evaluation.
+
+    References models from LLM pool by model ID (the key in llm_pool.models).
+    Each judge ID must correspond to a key in the llm_pool.models dictionary.
+    """
+
+    model_config = ConfigDict(extra="forbid")
+
+    judges: list[str] = Field(
+        ...,
+        min_length=1,
+        description="List of model IDs (keys from llm_pool.models). At least one required.",
+    )
+    enabled_metrics: Optional[list[str]] = Field(
+        default=None,
+        description=(
+            "Metrics that should use the judge panel. "
+            "If None, all metrics use the panel. "
+            "If empty list, no metrics use the panel."
+        ),
+    )
+    aggregation_strategy: str = Field(
+        default="average",
+        description=(
+            "Strategy for aggregating scores from multiple judges. "
+            "Options: 'max', 'average', 'majority_vote'. "
+            "Note: Currently unused - will be implemented later."
+        ),
+    )
+
+    @field_validator("enabled_metrics")
+    @classmethod
+    def validate_enabled_metrics(cls, v: Optional[list[str]]) -> Optional[list[str]]:
+        """Validate enabled_metrics format (framework:metric_name)."""
+        if v is not None:
+            for metric in v:
+                if not metric or ":" not in metric:
+                    raise ValueError(
+                        f'Metric "{metric}" must be in format "framework:metric_name"'
+                    )
+                parts = metric.split(":", 1)
+                if len(parts) != 2 or not parts[0].strip() or not parts[1].strip():
+                    raise ValueError(
+                        f'Metric "{metric}" must be in format "framework:metric_name"'
+                    )
+        return v
+
+    @field_validator("aggregation_strategy")
+    @classmethod
+    def validate_aggregation_strategy(cls, v: str) -> str:
+        """Validate aggregation_strategy is a supported value."""
+        allowed = ["max", "average", "majority_vote"]
+        if v not in allowed:
+            raise ValueError(
+                f"Unsupported aggregation_strategy '{v}'. Allowed: {allowed}"
+            )
+        return v
+
+
 class SystemConfig(BaseModel):
     """System configuration using individual config models."""
 
@@ -328,6 +612,25 @@ class SystemConfig(BaseModel):
         default_factory=CoreConfig, description="Core eval configuration"
     )
     llm: LLMConfig = Field(default_factory=LLMConfig, description="LLM configuration")
+
+    # LLM Pool - shared pool of LLM configurations
+    llm_pool: Optional[LLMPoolConfig] = Field(
+        default=None,
+        description=(
+            "Pool of LLM configurations. Define models once, "
+            "reference by ID in judge_panel or other components."
+        ),
+    )
+
+    # Judge Panel - references models from llm_pool
+    judge_panel: Optional[JudgePanelConfig] = Field(
+        default=None,
+        description=(
+            "Optional judge panel configuration. "
+            "References models from 'llm_pool' by ID. "
+            "If not provided, the single 'llm' configuration is used."
+        ),
+    )
     embedding: EmbeddingConfig = Field(
         default_factory=EmbeddingConfig, description="Embeddings configuration"
     )
@@ -349,3 +652,50 @@ class SystemConfig(BaseModel):
     default_conversation_metrics_metadata: dict[str, dict[str, Any]] = Field(
         default_factory=dict, description="Default conversation metrics metadata"
     )
+
+    def get_judge_configs(self) -> list[LLMConfig]:
+        """Get resolved LLMConfig for all judges.
+
+        Returns:
+            List of LLMConfig objects for each judge.
+            If judge_panel is configured, resolves from llm_pool.
+            Otherwise, returns single llm config.
+        """
+        if not self.judge_panel:
+            return [self.llm]
+
+        if not self.llm_pool:
+            raise ConfigurationError(
+                "judge_panel is configured but 'llm_pool' is not defined. "
+                "Please define the llm_pool section with models."
+            )
+
+        configs = []
+        for idx, judge_id in enumerate(self.judge_panel.judges):
+            cache_suffix = f"judge_{idx}"
+            config = self.llm_pool.resolve_llm_config(
+                judge_id, cache_suffix=cache_suffix
+            )
+            configs.append(config)
+        return configs
+
+    def get_llm_config(
+        self, model_id: str, cache_suffix: Optional[str] = None
+    ) -> LLMConfig:
+        """Get resolved LLMConfig for a specific model from the pool.
+
+        Args:
+            model_id: Model identifier (key in llm_pool.models)
+            cache_suffix: Optional suffix for cache directory
+
+        Returns:
+            Fully resolved LLMConfig
+
+        Raises:
+            ConfigurationError: If llm_pool not configured or model not found
+        """
+        if not self.llm_pool:
+            raise ConfigurationError(
+                f"Cannot resolve model '{model_id}' - 'llm_pool' is not configured."
+            )
+        return self.llm_pool.resolve_llm_config(model_id, cache_suffix=cache_suffix)