Isolated practice environment

Fix a real bug.
Prove it works.

You’ll get a live project, editor, terminal, tests, and browser preview. Ava begins with evidence and asks one useful question—then gets out of the way.

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your workspace

01 export function openTickets(items) {
02 return items.filter(ticket =>
03 ticket.status === "closed"
04 );
05 }

Expected 2 · received 1One failing test becomes your starting evidence.

Real runtime, narrow permissionsCPU, memory, lifetime, files, and commands are bounded.

Fix a real bug.Prove it works.

Fix a real bug.
Prove it works.