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feat: Allow using prompt variables everywhere #5369
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Reference: github-starred/open-webui#5369
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Originally created by @gjsmo on GitHub (May 28, 2025).
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Problem Description
Currently, I can use prompt variables such as
{{CURRENT_TIME}}or{{USER_LANGUAGE}}in system prompts, which is very helpful. However, I cannot use these in for example, the tag or title generation prompts.Desired Solution you'd like
The variable replacement should be applied to all prompt fields, including system prompt, RAG prompt, tag/title generation prompt, etc.
Alternatives Considered
It's possible to add all of this information directly to the system prompt, however it's often not needed there. This increases context unnecessarily, slowing down generation speed.
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