A code of conduct (CLAUDE.md) for AI coding agents, specifically fixing the two most criticized issues of Claude Opus 4.8 during long tasks—becoming less capable and perfunctory—and written and verified by its successor model, Claude Fable 5.
1 file for Claude Code: endurance-guidelines CLAUDE.md — 990 tokens loaded in every session.
CLAUDE.md A 990 tok These files are gn00678465/endurance-guidelines's own configuration — they tell Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.