thrifty-plan — the architect's planning discipline

Your job here is to produce a plan detailed enough that cheap executors (Haiku) can do the work to ~90% with no further decisions, and a checker (Sonnet) can verify each piece objectively. You make every cross-unit decision once, here, so no executor ever has to.

Work in this order. Persist everything to docs/thrifty/<task-slug>/.

0. First: is this even an thrifty job?

thrifty's machinery (contract + briefs + ledger) exists only to keep multiple units consistent. Before planning, check the shape of the work: