`/get_thresholds` returns 500 due to route/helper argument mismatch

[aaronaco]

Description (Actual Behavior)

The documented GET /get_thresholds endpoint returns 500 Internal Server Error when called from Swagger UI.

Swagger documents the required query parameter as prompts, but app.py reads prompt. The route then calls:

recommendation_handler.get_thresholds(prompt, prompt_json, api_url, headers)

while the helper signature is:

get_thresholds(prompts, prompt_json, embedding_fn=None)

This causes the endpoint to fail with a TypeError because the route passes four arguments to a helper that accepts two or three.

Expected Behavior

GET /get_thresholds should accept one or more prompt samples through the documented prompts query parameter and return threshold recommendations as JSON.

For missing or empty prompt samples, the endpoint should return a clear client error instead of a server error.

Possible Fix

Update the route to:

• read the documented prompts query parameter
• construct an embedding function
• call recommendation_handler.get_thresholds(prompts, prompt_json, embedding_fn)
• return a JSON 400 response for missing or empty input
• update Swagger to document how multiple prompts values should be supplied

Steps to Reproduce

1. Start the server:

python app.py

2. Open Swagger UI:

http://127.0.0.1:8080/swagger

3. Execute GET /get_thresholds with:

prompts = Act as a data scientist. Help me make this project more inclusive.

4. Observe 500 Internal Server Error.

Equivalent curl:

curl -X GET \
  'http://127.0.0.1:8080/get_thresholds?prompts=Act%20as%20a%20data%20scientist.%20Help%20me%20make%20this%20project%20more%20inclusive.' \
  -H 'accept: */*'

Context

The endpoint is documented in Swagger as “Function that recommends thresholds given an array of prompts,” but it is currently unusable through the documented request shape.