i mean there's also the fact that claude code injects this system message into your claude.md which means that even if your claude.md sucks you will probably be okay:

<system-reminder> IMPORTANT: this context may or may not be relevant to your tasks. You should not respond to this context or otherwise consider it in your response unless it is highly relevant to your task. Most of the time, it is not relevant. </system-reminder>

lots of others have written about this so i won't go deep but its a clear product decision, but if you don't know what's in your context window, you can't respond/architect your balance between claude.md and /commands well.