The seminar will start with a brief presentation of some of the main ZTF science drivers that require Alert Stream filters, and then we will add our own ZTF science goals and, as a group, create a Filter Wish List. Another brief presentation of the current Alert Packet contents will be provided, with a focus on the schema keys that are most likely to be used in a filter. We will then break into small groups and attempt to write conceptual-level algorithms for the filters on our wish list, and collect these into a single document. We will finish with a group discussion of the main problems/questions faced in our filter-writing attempts. The compiled Filter Wish List document and common issues faced will be used in the near future by the local UW ZTF alert stream team. If you’re not yet sure what kind of time-domain science you might do with ZTF, please do join us — hopefully one of the topics will be inspiring! Should you want to review the basics of the ZTF survey prior to this workshop, see Bellm et al. (2014): http://adsabs.harvard.edu/abs/2014htu..conf…27B