2. The computer-implemented method of claim 1 , further comprising persisting each generated parsing rule and data describing the action with which the generated parsing rule is associated to command models data that is accessible by a language processing system that parses command input sentences by the generated parsing rules and determines actions to perform based on a successful parses.
3. The computer-implemented method of claim 2 , wherein determining a quality score is a measure of user satisfaction that is dependent on user interactions with search results at the user device from which the first input sentence was received comprises, for each first input sentence: determining that the first input sentence was processed as a search query; determining a quality metric value for search results provided in response to the search query; and determining the quality score from the quality metric value.