Chat services fails when no variables are provided

[mmabrouk]

Chat services fails when there are no variables.

[linear]

AGE-3747

[ShubhamGond105]

Hey @mmabrouk

I'd like to work on this issue.
I've set up Agenta locally and explored the codebase.

Could you please assign this to me and point me to
the relevant file? I want to make sure I'm looking
in the right place before I start.

[junaway]

Hi @ShubhamGond105,
Thanks for taking care of this.
You should look into chat_v0 in handlers.py, in the SDK.

[ShubhamGond105]

@junaway

After applying fixes to chat_v0:
-Added None check before inputs.pop("messages", None)
-Added required_keys.discard("messages")
-Added None guard for provided_keys

The original error "Invalid inputs: Expected ['messages']"
is now gone. But I'm seeing a new error:

"Missing required inputs: messages"

This seems to come from inside PromptTemplate.format()
in types.py where input_keys validation happens again.

Should the fix also be applied inside PromptTemplate.format()
to discard "messages" from input_keys validation there?

Or is "messages" not supposed to be in input_keys at all
when the prompt has no variables?

[jp-agenta]

Hi @ShubhamGond105,

In trying to answer your question,
Our coding agent one-shot a PR with fixes, cleanups, and tests.

You might want to take a look at it.