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Description
Is your feature request related to a problem? Please describe.
I have AI tagging limited to use only existing tags. I use 10 tags across all my collection. However the AI tagger behaves very freely and assigned multiple tags to articles that i want to separate distinctly. E.g. 'homelab' and 'craft' should never be mixed together.
Describe the solution you'd like
Add the ability to define a system prompt to the AI tagger, so I could define some rules how the tags should be set.
Describe alternatives you've considered
Alternatively, tags could have a description property that would be passed to the AI tagger, where i would describe the use cases the tag applies to.