LangChain Misusing eq comparator for Pinecone Arrays (Filtering through MetaData in Pinecone)

[zainamjad2511]

So I am using pinecone and using self query retrieval with gemini 2.5 pro, with langsmith i came to know the default prompt strictly instructs the ai to use specific comparators

Default Prompt in pineconetranslator:

A comparison statement takes the form: `comp(attr, val)`:

- `comp` (eq | ne | gt | gte | lt | lte): comparator

- `attr` (string): name of attribute to apply the comparison to

- `val` (string): is the comparison value

MY PROMPT:

{
"type": "string[]",
"description": "An array of technologies. Use this for filtering by technical skills. The query must use the `in` operator for this field. For example, to find projects with React and Node.js, a good filter would be `and(in(\"techStack\", [\"React\", \"Node.js\"]))`"
}

But the output comes to be using the operators allowed by the default prompt , i am unable to use IN comparator for pinecone query , whats the solution to it?