/systemWrites a custom system prompt you can drop into any LLM, not just Claude.
Category: Power Commands
Before / After
Make me a system prompt for [thing].
/system I want a writing coach that gives blunt, specific feedback on essays.
What changes in Claude's response
Claude returns a complete system prompt with role, voice, response format, what to do, what NOT to do, and example interactions. The output is portable — paste it into ChatGPT, Gemini, Claude, or your own app's system prompt. Especially useful for building custom GPTs and Claude Projects.
When NOT to use /system
Don't /system for in-conversation tweaks. Use /voice for that — /system writes prompts meant to be reused, not one-off.
Codes that stack with /system
/system is one of 120 tested prompt prefixes. The full cheat sheet has before/after examples, warnings, combos, and 10 workflow playbooks.
See the full cheat sheet — from $5More Power Commands codes
/godmodeThe most thorough, longest, most detailed response Claude can give. Use sparingly.
/autopromptYou give Claude a rough idea, it builds the perfect prompt to get the best output.
MEGAPROMPTGenerates a long, detailed prompt for exactly what you want — usually 500+ words.
/chainRuns multiple prompts in sequence, feeding each one's output into the next.
PERSONAMakes Claude respond as a specific expert. The specificity is everything.