You can also replace Cursor's system prompt with your own. Rules, skills, and tool schemas still load.
We're enabling it account by account.
Cursor lets users replace its system prompt with their own
AISummary
Cursor is enabling an option to replace its built-in system prompt with a custom one, while rules, skills, and tool schemas still load. The feature is being rolled out account by account rather than to all users at once.
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Source: Cursor · x.comPublished · added here