Add projects

backend/sdk/cliproxy/executor/websocket.go

@@ -0,0 +1,29 @@
+package executor
+
+import (
+	"errors"
+	"net/http"
+)
+
+// UpstreamWebsocketReplayRequiredError indicates that an incremental request
+// cannot safely continue because its upstream websocket is no longer reusable.
+type UpstreamWebsocketReplayRequiredError struct{}
+
+func (*UpstreamWebsocketReplayRequiredError) Error() string {
+	return `{"error":{"message":"upstream transport requires full HTTP replay","type":"server_error","code":"upstream_http_replay_required","status":426}}`
+}
+
+func (*UpstreamWebsocketReplayRequiredError) StatusCode() int { return http.StatusUpgradeRequired }
+
+func (*UpstreamWebsocketReplayRequiredError) IsRequestScoped() bool { return true }
+
+// NewUpstreamWebsocketReplayRequiredError creates a request-scoped replay signal.
+func NewUpstreamWebsocketReplayRequiredError() error {
+	return &UpstreamWebsocketReplayRequiredError{}
+}
+
+// IsUpstreamWebsocketReplayRequired reports whether err is the internal replay signal.
+func IsUpstreamWebsocketReplayRequired(err error) bool {
+	var replayErr *UpstreamWebsocketReplayRequiredError
+	return errors.As(err, &replayErr)
+}