Spec

A handoff artifact describing a multi-session piece of work — what's being built, not how each session does its share. Mutates as work progresses. Made of tickets.

Usage:

"Should this all be one session?"

"No, write it up as a spec — break it into tickets, run each one in its own session. Trying to do the whole thing in a single context will hit the dumb zone before you're halfway."