first commit

transports/bifrost-http/integrations/langchain.go

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+package integrations
+
+import (
+	bifrost "github.com/maximhq/bifrost/core"
+	"github.com/maximhq/bifrost/core/schemas"
+	"github.com/maximhq/bifrost/transports/bifrost-http/lib"
+)
+
+// LangChainRouter holds route registrations for LangChain endpoints.
+// It supports standard chat completions and image-enabled vision capabilities.
+// LangChain is fully OpenAI-compatible, so we reuse OpenAI types
+// with aliases for clarity and minimal LangChain-specific extensions
+type LangChainRouter struct {
+	*GenericRouter
+}
+
+// NewLangChainRouter creates a new LangChainRouter with the given bifrost client.
+func NewLangChainRouter(client *bifrost.Bifrost, handlerStore lib.HandlerStore, logger schemas.Logger) *LangChainRouter {
+	routes := []RouteConfig{}
+
+	// Add OpenAI routes to LangChain for OpenAI API compatibility
+	routes = append(routes, CreateOpenAIRouteConfigs("/langchain", handlerStore)...)
+
+	// Add Anthropic routes to LangChain for Anthropic API compatibility
+	routes = append(routes, CreateAnthropicRouteConfigs("/langchain", logger)...)
+
+	// Add Anthropic count tokens route for LangChain to ensure token counting uses the dedicated endpoint
+	routes = append(routes, CreateAnthropicCountTokensRouteConfigs("/langchain", handlerStore)...)
+
+	// Add GenAI routes to LangChain for Vertex AI compatibility
+	routes = append(routes, CreateGenAIRouteConfigs("/langchain")...)
+
+	// Add Bedrock routes to LangChain for AWS Bedrock API compatibility
+	routes = append(routes, CreateBedrockRouteConfigs("/langchain", handlerStore)...)
+
+	// Add Cohere routes to LangChain for Cohere API compatibility
+	routes = append(routes, CreateCohereRouteConfigs("/langchain")...)
+
+	return &LangChainRouter{
+		GenericRouter: NewGenericRouter(client, handlerStore, routes, nil, logger),
+	}
+}