Agent engineering's last mile: models miss obvious bugs unless you tell them what to look for

MoonL88537 · x · 2026-09-18

A discussion on AI agent engineering pain points: one approach is running a static correctness pass with models like astra/fable on a narrow codepath, but you still need to know where to point it — the 'wait, what happens if these two ops run together' prompt remains on you.

The original poster agrees this is the last mile holding everything back: unless you tell agents what to look for, they won't report issues that are 'obvious' to humans; he's been stuck on this for weeks.

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