Most PMs are still pasting the same 800-word prompt at the top of every Claude session. The PMs pulling ahead stopped doing that 6 months ago. Prompts are text you have to remember to paste. Skills are reusable behavior Claude auto-loads the moment your message matches what the skill does. You install once, you stop copy-pasting, and your teammate runs the exact same version you do. I ran 75 tests across 25 skills last week. 15 PM skills I use daily plus 10 built specifically to surface edge…