jsonschema: support additional keywords

[jba]

The JSON Schema spec allows additional keywords, beyond those in the various specified vocabularies.

The Schema type should support that. The obvious way is to add a map[string]any field. We then have to ensure that the map keys are JSON-marshaled at top level, along with the other keywords. That is a bit tricky, but we have [un]marshalStructWithMap in mcp/util.go.

[albertsundjaja]

hello! I'm interested in contributing to accelerate the release :)

I have taken a look at the source code and my plan for tackling this is to

1. add a map[string]any field in Schema type defined in jsonschema/schema.go
2. extend the [UN]MarshalJSON functions to use the [un]marshalStructWithMap

• the Extra fields will hold the extra fields that are not defined in Schema but during marshal, Extra will be flattened to top level key-value pairs

3. add / refactor necessary unit tests for the above (unknown fields are no longer dropped)

Let me know if I can pick this up!

[jba]

Thanks! I assigned you.
You'll have to copy the [un]marshalStructWithMap functions into jsonschema.

[jba]

@qiaodev if Schema had an Extra field, and you could do:

schema.Extra["propertyOrdering"] = []string{"a", "b", "c"}

would that work for genai?

[qiaodev]

would that work for genai?

Thanks for the effort. It works for genai.