Context

const schema = Joi.object({
	Strengths: Joi.object().pattern(
		Joi.string().valid(Joi.ref('$StrengthOptions')),
		Joi.number().integer().greator(0).allow(0)
	).default({})
})

What are you trying to achieve or the steps to reproduce ?

Trying to validate that an object only has keys from a specific set. However the set is dynamic. The valid function works if just using a static list i.e ['coding', 'reviewing'].

const strengthNames: string[] = *Call to get names of possible strengths*
const options: Joi.ValidationOptions = {
	abortEarly: false,
	convert: true,
	allowUnknown: false,
	context: {
		StrengthOptions: strengthNames
	}
}
Joi.validate(
	someObj,
	schema,
	options,
	(errors: ValidationError, value:any) => {
		if(errors){
			console.log(error);
		}
	}
);

Which result you had ?

{
message: '"coding" is not allowed',
path: [ 'Strengths', 'coding' ],
type: 'object.allowUnknown',
context: { child: 'coding', value: 3, key: 'coding', label: 'coding' }
}

What did you expect ?

"coding" should be allowed it is in the strengthNames array.
context of the error should also contatin valids: [ array ]
type of error should be 'any.allowOnly'