first commit

plugins/compat/conversion.go

@@ -0,0 +1,61 @@
+package compat
+
+import (
+	"github.com/maximhq/bifrost/core/schemas"
+)
+
+// applyParameterConversion rewrites request fields in place for provider compatibility.
+func applyParameterConversion(req *schemas.BifrostRequest) {
+	if req == nil {
+		return
+	}
+	if req.ChatRequest != nil {
+		normalizeDeveloperRoleForChatRequest(req.ChatRequest)
+	}
+	if req.ResponsesRequest != nil {
+		flattenNamespaceTools(req.ResponsesRequest)
+	}
+}
+
+// flattenNamespaceTools expands namespace scoped tools into a flat list of tools.
+func flattenNamespaceTools(req *schemas.BifrostResponsesRequest) {
+	if req == nil || req.Params == nil {
+		return
+	}
+	// ignore openai models or azure hosted openai models
+	if req.Provider == schemas.OpenAI || (req.Provider == schemas.Azure && !schemas.IsAnthropicModel(req.Model)) {
+		return
+	}
+	hasNamespace := false
+	finalSize := len(req.Params.Tools)
+	for _, tool := range req.Params.Tools {
+		if tool.Type != schemas.ResponsesToolTypeNamespace || tool.ResponsesToolNamespace == nil || tool.ResponsesToolNamespace.Tools == nil {
+			continue
+		}
+		finalSize += len(tool.ResponsesToolNamespace.Tools)
+		hasNamespace = true
+	}
+	if !hasNamespace {
+		return
+	}
+	flattened := make([]schemas.ResponsesTool, 0, finalSize)
+	for _, tool := range req.Params.Tools {
+		if tool.Type != schemas.ResponsesToolTypeNamespace {
+			flattened = append(flattened, tool)
+		} else if tool.ResponsesToolNamespace != nil && tool.ResponsesToolNamespace.Tools != nil {
+			flattened = append(flattened, tool.ResponsesToolNamespace.Tools...)
+		}
+	}
+	req.Params.Tools = flattened
+}
+
+func normalizeDeveloperRoleForChatRequest(req *schemas.BifrostChatRequest) {
+	if req.Provider != schemas.Bedrock && req.Provider != schemas.Vertex && req.Provider != schemas.Gemini {
+		return
+	}
+	for i := range req.Input {
+		if req.Input[i].Role == schemas.ChatMessageRoleDeveloper {
+			req.Input[i].Role = schemas.ChatMessageRoleSystem
+		}
+	}
+}