[feat] Improved stream handling

Description

Contributor guide

Tech stack

javascriptnodejs

Domain

backend

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-3 hours

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

fresh

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

mostly clear

Prerequisites

Node.js streams basicsKoa middleware concepts

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

60

Research direction

Investigate how Koa currently handles stream responses in lib/response.js. Study Node.js stream.pipeline() to replace manual piping and error handling. Check existing tests and any related issues or PRs for context. The issue requests support for fetch response streams and request body streams, so also examine how request body streams are consumed.