Start a Phygital Brain job: returns that job's step-by-step instructions (a skill) as text, for you to follow. It changes nothing by itself: you then build or change the person's brain with your own file tools, in the folder they chose. Call it first when the person says 'set up my second brain', 'upgrade my second brain', 'set up my team', 'set up my brain keeper', 'translate Phygital Brain into my language', 'switch my brain to another language', or the same in another language. Calling it again returns the same instructions. To open a file the instructions name, use phygital_brain_read_file; to see which files exist, use phygital_brain_list_files. An unknown job returns an error naming the valid ones.

Read one of Phygital Brain's own files and return its full text: a form, a template, a language file, a skill, or the suggested skills and apps people can add (start with 'suggested-skills/README.md' and 'suggested-apps/README.md'). Use it when the instructions from phygital_brain_start name a file, or when the person asks what they can add to their brain; if you don't know the exact name, list the folder with phygital_brain_list_files first. A missing file, a folder, or a path outside the skills folder returns an error that says so. It reads only Phygital Brain's files, never the person's brain, and changes nothing.

List what's in one of Phygital Brain's folders: one name per line, sorted, with folders ending in '/'. It doesn't look inside subfolders: list a subfolder to see its files. Use it to find a file's exact name, then open the file with phygital_brain_read_file. A folder that doesn't exist returns an error. It reads only Phygital Brain's files, never the person's brain, and changes nothing.