EDIT: Minimum is at 293. New TAS when the new version of Celeste comes out.
Tool Assisted Speedrun of Celeste in as few dashes as possible. Huge shoutout to everyone on the Celeste Challenges Discord. This wouldn't have been possible without everyone's help.
Credits: amber/fishmcmuffins, Chickenleg, Cr33pyCat, dahlukeh, daffodilian, DDSalvy, euniversecat, JaThePlayer, lanbing, lith, Marlin, masrock9, med, nebs (me), NitroDash, RareBeeph, RichConnerGMN, RisingStar111, tong815, Vampire Flower, WoofWoofDoggo, _zball_
Also thanks to Cr33pyCat for recording this.
Many others in the community contributed in other ways
including finding strategies, suggesting improvements, and answering questions
Breakdown:
Forsaken City: 0
Old Site: 20
Celestial Resort: 18
Golden Ridge: 25
Mirror Temple: 18
Reflection: 38
Summit: 176
Total: 295
Celeste Version: 1.3.1.2
More detailed dash requirements for dashless at https://docs.google.com/spreadsheets/d/1r6hA7YFEQJiOBDzUNrYmWw9T-XpM-H_X3calvhvMPwQ/edit?usp=sharing