Anthropic just shipped Dreaming agents review their own sessions between runs, surface recurring mistakes, and rewrite their memory so the next session doesn't repeat them. Karpathy wrote CLAUDE.md for the same reason. > silent wrong assumptions > over-complication > orthogonal damage. his 4 rules cut Claude's mistakes from 41% to 11%. it was memory between sessions, written in 4 lines of markdown. Anthropic's platform team walked the architecture on stage last week at Code with Claude SF. Dreaming runs the same loop, automated, at platform level. CLAUDE.md is memory you write. Dreaming is memory the agent writes about itself. i ran Karpathy's 4 rules across 30 codebases for 6 weeks and added 8 more. it cut my mistakes another 8 points. all 12 are in the article. the 12 rules don't compete with Dreaming. they sit on top of it.