thin-runtime-handler

name	thin-runtime-handler
description	Keep HTTP, queue, and cron handlers focused on protocol translation
metadata	{"type":"Reference","origin":"harness-engineering/ch8","helpful":0,"harmful":0,"status":"active"}

Thin Runtime Handler

Rules

1. Runtime handlers parse input, call a service, and map results to protocol output.
2. Do not put DB access in runtime handlers.
3. Do not put business decisions in runtime handlers.
4. Keep error-to-status mapping explicit and local to runtime.

Checklist

• Handler body is short or split by protocol responsibilities
• Handler imports services, not repositories or ORM clients
• Invalid input and service failure are handled differently
• HTTP status mapping is not leaked into services