is your prompt literally 1-sentence?

if so, a better approach would be to ask it to first plan that entire task and give it some specific guidance

then once it has the plan, ask it to execute it, preferably by letting it call other subagents that take care of different phases of the implementation while the main loop just merges those worktrees back

it's how you should be using claude code too, btw

Claude Sonnet can easily one-shot that without specifically asking for plan first.