Hono has some in-built cookie-helpers.
import { Hono } from 'hono'
import {
getCookie,
getSignedCookie,
setCookie,
setSignedCookie,
deleteCookie,
} from 'hono/cookie'
Setting an auth cookie, for example:
setCookie(c, 'auth-session', sessionId, { maxAge: 3600, httpOnly: true, sameSite: 'Lax', secure: true }