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Pi with extensions included is always going to burn more tokens than pi without extensions, no?

Not if the extensions don't add any tools or modify your system prompt. :)

Hell, some extensions could theoretically lower your token burn. (Like rtk, if it actually worked.)

What's the use of extensions without tools or prompts?

A cup holder doesnt make your car go faster.

The coffee prevents you from falling asleep at the wheel and crashing, however.

If you're that tired that you need coffee to stay awake, you absolutely shouldn't be driving.

But people drive, and given enough coffee it's safe.

But you want to forbid those people from driving.

Do you work for Anthropic?

I have one that stashes/pops a single prompt, like Claude Code's Ctrl+s feature.

I have another one that allows you to edit the items in your Pi /tree history.

Some permission manager extensions also sit between the model and the harness, and don't actively change the tool or prompt info.

I probably have more, but you get the idea.