Add files via upload

internal/knowledge/eino_retrieve_chain.go

@@ -0,0 +1,24 @@
+package knowledge
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/cloudwego/eino/compose"
+	"github.com/cloudwego/eino/schema"
+)
+
+// BuildKnowledgeRetrieveChain 编译「查询字符串 → 文档列表」的 Eino Chain（MultiQuery → 向量 → 重排 → 后处理）。
+func BuildKnowledgeRetrieveChain(ctx context.Context, r *Retriever) (compose.Runnable[string, []*schema.Document], error) {
+	if r == nil {
+		return nil, fmt.Errorf("retriever is nil")
+	}
+	ch := compose.NewChain[string, []*schema.Document]()
+	ch.AppendRetriever(r.AsEinoRetriever())
+	return ch.Compile(ctx)
+}
+
+// CompileRetrieveChain 等价于 [BuildKnowledgeRetrieveChain](ctx, r)。
+func (r *Retriever) CompileRetrieveChain(ctx context.Context) (compose.Runnable[string, []*schema.Document], error) {
+	return BuildKnowledgeRetrieveChain(ctx, r)
+}