replace {{current_date}} server side for OpenAI, Anthropic and Assistants

[owengo]

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LibreChat-AI/librechat.ai#132

Summary

Following discussion at: #3713

This is a proposal to replace a special variable: {{current_date}} in the system prompt ( for OpenAI et Anthropic ) or the "extended instructions" of the Assistants. Could be extended to other models too.

Change Type

Please delete any irrelevant options.

• New feature (non-breaking change which adds functionality)

Testing

Please describe your test process and include instructions so that we can reproduce your test. If there are any important variables for your testing configuration, list them here.

Create a custom setting like this for OpenAI or Anthropic:
"Your are a helpful assistant. Today is the {{current_date}}"

Then, using this setting, ask "What day is it today?"
The bot should give the correct answer ( based on the server settings ).

Test Configuration:

Checklist

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• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• I have made pertinent documentation changes
• My changes do not introduce new warnings
• Local unit tests pass with my changes
• A pull request for updating the documentation has been submitted.

[danny-avila]

When making a PR, there's no need to keep your branch updated to latest unless the underlying files you changed were also changed. In which case, the git rebase strategy is preferred as it would put your commits on top of the latest changes

[danny-avila]

I've closed this PR because there are too many irrelevant changes, created likely due to how the branch was updated.

Also for this feature, changes should take place in api/server/middleware/buildEndpointOption.js so it could affect every endpoint.

Lastly, I would prefer this feature be implemented in a way that allows the special variables to still be replaced client-side. The reason is that the time strings could be created relative to the user and not the server. maybe {{server_*}} prefix or something like that, for server-specific variables.

[owengo]

Oh sorry for the pr on the main branch, stupid mistake. I use the branch for other changes completely unrelated.
I agree that using the client timezone would be better, but I'm not sure how you want to keep it updated if it's done client-side.

Let's say you start a conversation today, and you go on with it next week, what do you send in the system prompt? today? last week? If it's today ( which was the behavior with the PR ) I'm not sure how the client side is supposed to override the system-prompt stored last week.
As I understand the code the client sends only the last message so we would need to add a client parameter like "current-client-side-date" and have it processed by the middleware.
Thanks for the middleware tip.