Optimize OpenRouter registry loading with class-level caching
Instead of creating new OpenRouterModelRegistry instances multiple times per tool (4x per tool during schema generation), we now use a shared class-level cache in BaseTool. This reduces registry loading from 40+ times to just once during MCP server initialization. The optimization: - Adds _openrouter_registry_cache as a class variable in BaseTool - Implements _get_openrouter_registry() classmethod for lazy loading - Ensures cache is shared across all tool subclasses - Maintains identical functionality with improved performance This significantly reduces startup time and resource usage when OpenRouter is configured, especially noticeable with many custom models. 🤖 Generated with Claude Code Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Fahad
131
tools/base.py
131
tools/base.py
@@ -136,6 +136,20 @@ class BaseTool(ABC):
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4. Register the tool in server.py's TOOLS dictionary
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"""
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# Class-level cache for OpenRouter registry to avoid repeated loading
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_openrouter_registry_cache = None
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@classmethod
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def _get_openrouter_registry(cls):
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"""Get cached OpenRouter registry instance, creating if needed."""
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# Use BaseTool class directly to ensure cache is shared across all subclasses
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if BaseTool._openrouter_registry_cache is None:
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from providers.openrouter_registry import OpenRouterModelRegistry
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BaseTool._openrouter_registry_cache = OpenRouterModelRegistry()
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logger.debug("Created cached OpenRouter registry instance")
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return BaseTool._openrouter_registry_cache
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def __init__(self):
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# Cache tool metadata at initialization to avoid repeated calls
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self.name = self.get_name()
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@@ -251,48 +265,62 @@ class BaseTool(ABC):
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def _get_available_models(self) -> list[str]:
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"""
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Get list of models that are actually available with current API keys.
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Get list of all possible models for the schema enum.
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This respects model restrictions automatically.
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In auto mode, we show ALL models from MODEL_CAPABILITIES_DESC so Claude
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can see all options, even if some require additional API configuration.
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Runtime validation will handle whether a model is actually available.
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Returns:
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List of available model names
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List of all model names from config
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"""
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from config import MODEL_CAPABILITIES_DESC
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from providers.base import ProviderType
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from providers.registry import ModelProviderRegistry
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# Get available models from registry (respects restrictions)
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available_models_map = ModelProviderRegistry.get_available_models(respect_restrictions=True)
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available_models = list(available_models_map.keys())
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# Start with all models from MODEL_CAPABILITIES_DESC
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all_models = list(MODEL_CAPABILITIES_DESC.keys())
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# Add model aliases if their targets are available
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model_aliases = []
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for alias, target in MODEL_CAPABILITIES_DESC.items():
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if alias not in available_models and target in available_models:
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model_aliases.append(alias)
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# Add OpenRouter models if OpenRouter is configured
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openrouter_key = os.getenv("OPENROUTER_API_KEY")
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if openrouter_key and openrouter_key != "your_openrouter_api_key_here":
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try:
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registry = self._get_openrouter_registry()
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# Add all aliases from the registry (includes OpenRouter cloud models)
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for alias in registry.list_aliases():
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if alias not in all_models:
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all_models.append(alias)
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except Exception as e:
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import logging
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available_models.extend(model_aliases)
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logging.debug(f"Failed to add OpenRouter models to enum: {e}")
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# Also check if OpenRouter is available (it accepts any model)
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openrouter_provider = ModelProviderRegistry.get_provider(ProviderType.OPENROUTER)
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if openrouter_provider and not available_models:
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# If only OpenRouter is available, suggest using any model through it
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available_models.append("any model via OpenRouter")
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# Add custom models if custom API is configured
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custom_url = os.getenv("CUSTOM_API_URL")
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if custom_url:
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try:
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registry = self._get_openrouter_registry()
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# Find all custom models (is_custom=true)
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for alias in registry.list_aliases():
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config = registry.resolve(alias)
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if config and hasattr(config, "is_custom") and config.is_custom:
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if alias not in all_models:
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all_models.append(alias)
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except Exception as e:
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import logging
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if not available_models:
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# Check if it's due to restrictions
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from utils.model_restrictions import get_restriction_service
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logging.debug(f"Failed to add custom models to enum: {e}")
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restriction_service = get_restriction_service()
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restrictions = restriction_service.get_restriction_summary()
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# Note: MODEL_CAPABILITIES_DESC already includes both short aliases (e.g., "flash", "o3")
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# and full model names (e.g., "gemini-2.5-flash-preview-05-20") as keys
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if restrictions:
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return ["none - all models blocked by restrictions set in .env"]
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else:
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return ["none - please configure API keys"]
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# Remove duplicates while preserving order
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seen = set()
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unique_models = []
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for model in all_models:
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if model not in seen:
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seen.add(model)
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unique_models.append(model)
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return available_models
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return unique_models
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def get_model_field_schema(self) -> dict[str, Any]:
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"""
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@@ -323,14 +351,42 @@ class BaseTool(ABC):
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for model, desc in MODEL_CAPABILITIES_DESC.items():
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model_desc_parts.append(f"- '{model}': {desc}")
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# Add custom models if custom API is configured
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custom_url = os.getenv("CUSTOM_API_URL")
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if custom_url:
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# Load custom models from registry
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try:
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registry = self._get_openrouter_registry()
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model_desc_parts.append(f"\nCustom models via {custom_url}:")
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# Find all custom models (is_custom=true)
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for alias in registry.list_aliases():
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config = registry.resolve(alias)
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if config and hasattr(config, "is_custom") and config.is_custom:
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# Format context window
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context_tokens = config.context_window
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if context_tokens >= 1_000_000:
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context_str = f"{context_tokens // 1_000_000}M"
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elif context_tokens >= 1_000:
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context_str = f"{context_tokens // 1_000}K"
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else:
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context_str = str(context_tokens)
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desc_line = f"- '{alias}' ({context_str} context): {config.description}"
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if desc_line not in model_desc_parts: # Avoid duplicates
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model_desc_parts.append(desc_line)
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except Exception as e:
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import logging
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logging.debug(f"Failed to load custom model descriptions: {e}")
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model_desc_parts.append(f"\nCustom models: Models available via {custom_url}")
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if has_openrouter:
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# Add OpenRouter models with descriptions
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try:
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import logging
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from providers.openrouter_registry import OpenRouterModelRegistry
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registry = OpenRouterModelRegistry()
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registry = self._get_openrouter_registry()
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# Group models by their model_name to avoid duplicates
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seen_models = set()
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@@ -379,10 +435,13 @@ class BaseTool(ABC):
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"\nOpenRouter models: If configured, you can also use ANY model available on OpenRouter."
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)
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# Get all available models for the enum
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all_models = self._get_available_models()
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return {
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"type": "string",
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"description": "\n".join(model_desc_parts),
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"enum": list(MODEL_CAPABILITIES_DESC.keys()),
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"enum": all_models,
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}
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else:
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# Normal mode - model is optional with default
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@@ -393,11 +452,7 @@ class BaseTool(ABC):
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if has_openrouter:
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# Add OpenRouter aliases
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try:
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# Import registry directly to show available aliases
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# This works even without an API key
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from providers.openrouter_registry import OpenRouterModelRegistry
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registry = OpenRouterModelRegistry()
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registry = self._get_openrouter_registry()
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aliases = registry.list_aliases()
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# Show ALL aliases from the configuration
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