Skim the post for mentions of project files or custom instructions (3 minutes, tops). Then open a chat with custom instructions set up if you have them, or just paste: 'Write a 5-line standing instruction block for an AI that helps me with work email: tone, no invented facts, always draft only, max length.' You're done with 5 lines you'd actually paste into Custom Instructions or a project file.
How-to · WFL · WFL.3
X snack: CLAUDE.md / project memory beats one clever prompt
Standing project memory (CLAUDE.md / rules file) beats reinventing the perfect prompt every session.
Worked example
Standing instruction files — like CLAUDE.md, project rules, or custom instructions — deliver better results than any clever one-liner ever could. Think of them as persistent context for your tools, not some magic vault for secrets. Write it once, reuse it every session.