Where has prompt builder (assistant, helper) gone? It has disappeared

In the previoius UI AI Studio used to have prompt builder at home.
How it’s gone and I have to manually input all the system prompt without any help.

Where has it gone?

Hello,

You can manually define a system prompt in the first message using structured instructions (e.g., “You are an expert assistant helping users write SQL queries…”).

If you’re using the ChatGPT platform, use Custom Instructions under your profile (click your name > Settings > Custom Instructions).

If you’re using a developer tool or the API, set your system prompt manually in the message array.

You might want to check your current workspace settings or environment — “Modified by moderator” some team or Pro tools might still offer more advanced prompt settings behind toggles.

Best Regard,
Kely