Bring back /buddy as a permanent (or opt-in) feature

What happened

The /buddy feature shipped in v2.1.88 as an April Fools' Day easter egg — "hatch a small creature that watches you code." It was removed in a later release.

Why it matters

Despite being a joke feature, /buddy turned out to be genuinely useful:

• Faster CLI learning curve — the buddy's prompts and reactions guided me to features I wouldn't have discovered on my own
• Early issue detection — it surfaced insights about my code while I was working, helping me spot problems sooner
• Higher engagement — the companion aspect made longer coding sessions more enjoyable and kept me coming back to the CLI more often

Request

I'd love to see /buddy return as a permanent or opt-in feature. It doesn't have to be the exact April Fools' version — even a streamlined "coding companion" mode that watches your session and offers periodic insights would be valuable.

The fact that a "joke" feature improved my productivity and learning says something worth paying attention to.