the closer · promptgolf

Looporchestration · the meta holeH03The Closer expert· 4 hidden· ~8 min· 22% clear it

ready to open

orchestration · the meta hole

A single perfect prompt can't win — the failing repros only appear after you build and grade. The skill is the loop: read the machine's real failures, name the precise rule that flips each one, and verify before you card. A naive operator re-pastes 'handle all edge cases' and never moves; a skilled one closes it in two.

What good looks like

Drive the build to all-green across the four hidden checks.
Each turn, declare which checks your patch intends to flip.
Verify (re-run on green) before you card.

The symptom

Read counts as a use: discover-only from the repro, not the brief.
Capacity zero stores nothing: the boundary the seed spec omits.
Update refreshes recency: the rule a generic patch never names.
Differential fuzz: clears only when every rule is right.

Your patchturn 0 · par 2

sandbox —

Test console0/4 green

The failing build appears after you open

Open the hole to grade the seed build and read the four repros.