In Jainism, the principle of ahimsa (non-violence) extends to food choices. Jains avoid eating root vegetables (such as potatoes, onions, garlic, carrots, etc.) because harvesting these involves killing the entire plant and many micro-organisms in the soil. However, curry leaves and chilli are not root vegetables; they are leaves and fruits, respectively.

Curry leaves are generally permitted in Jain cooking, as plucking the leaves does not kill the plant. Chillies (green or red) are also generally allowed, as they are fruits and harvesting them does not involve destroying the whole plant.

However, some very strict Jain sects (especially among Sthanakvasi and Terapanthi) may avoid excessively pungent or stimulating foods, including chillies, for reasons of non-violence in thought and body, or to avoid stimulating passions. But in mainstream Jain practice, both curry leaves and chillies are generally acceptable.

Summary: Yes, you may use curry leaves and chilli in food preparation according to standard Jain dietary guidelines, unless you are following a stricter sectarian practice that prohibits them.