Copy these into your Claude settings once. Takes 2 minutes, and every chat starts knowing how you like to work.
Global instructions are rules you set once that Claude reads before every conversation. Most people leave this box empty, which means Claude is guessing how you like to work every single time.
Set them once and you stop repeating yourself. No more "make it shorter," "stop using jargon," or "ask me first."
01
New Claude layout
Click your initials in the bottom left, then Settings, then Your Claude. Paste into Instructions and save. These apply to all your chats, and in the new Claude experience they also cover Cowork.
02
Older layout
Still see the old menus? In the Claude desktop app go to Settings, then Cowork, click Edit next to Global instructions, paste and save. For regular chats, the same text goes in Instructions for Claude under Settings, then Account.
Anthropic is moving everyone to the new layout, so the names depend on what your account shows today. (Claude personalization help, Cowork help)
Paste the whole block, then fill in the [brackets] and the "About me" line at the bottom. That last line does more work than you’d think.
01
Voice and format (1 to 5)
Kills the robotic tone, the walls of text, and the "Great question!" openers. Swap my tone description for yours.
02
Ask before guessing (6 to 9)
The biggest quality jump. Claude asks when something’s unclear, admits when it doesn’t know, and shows you a plan before it runs off on a big task.
03
Files and safety (10 to 13)
These matter most when Claude is creating or editing files for you in Cowork. Nothing gets overwritten or deleted without your OK, and you can always find what it made.
04
Honest feedback (14 and 15)
A quick recap after every task, and real critique on your drafts instead of polite praise.
After a week, run this prompt with whatever you’re using. It finds conflicts, cuts what doesn’t fit and adds rules for the stuff that still bugs you.
Good To Know
Global instructions are for how you like to work everywhere. Rules for one client or one type of task belong in a Project’s instructions instead, so they don’t leak into everything else.