Add an Item to a Slot Type

Identify SKILL_ID and LOCALE:

ask api list-skills \
  | jq -r '.skills[] | "\([.nameByLocale[]][0]): \(.skillId) (\(.nameByLocale | keys[0]))"'

Add item:

ask api get-model --skill-id "${SKILL_ID}" --locale "${LOCALE}" \
  | jq '(.interactionModel.languageModel.types[] | select(.name == "${TYPE_NAME}").values) += [{ "name": { "value": "${NEW_ITEM}" } }]'

Update skill model:

ask api update-model --skill-id "${SKILL_ID}" --locale "${LOCALE}" --file <(
  ask api get-model --skill-id "${SKILL_ID}" --locale "${LOCALE}" \
    | jq '(.interactionModel.languageModel.types[] | select(.name == "${TYPE_NAME}").values) += [{ "name": { "value": "${NEW_ITEM}" } }]'
)