Open any chat tool and paste: 'Step1: outline a 5-email welcome sequence. Wait. Step2: I approve only if each email has one CTA. Rewrite outline to satisfy.' You're done when every email idea has an explicit call to action.
How-to · WFL · WFL.1
X-style: prompt chaining with a gate
Prompt chaining with a gate: each step has a check before the next step runs.
Worked example
Chaining looks like this: outline _ gate-check _ draft _ tone-check. It trades one-shot vibes for real accuracy.