I feel like I can manage the entire stack again - with confidence.

I have less confidence after a session, now I second guess everything and it slows me down because I know the foot-gun is in there somewhere.

For example, yesterday Gemini started added garbage Unicode and then diagnosed file corruption which it failed to fix.

And before you reply, yes it's my fault for not adding "URGENT CRITICAL REQUIREMENT: don't add rubbish Unicode" to my GEMINI.md.