super minimal would be - [x] read (stdin) - 2 variants (into str8 and just memory) - [x] write - 2 variants as well - 4 if counting Sys vs Sys - [x] stdout - [ ] (stderr) next would be - [ ] open (including create) - [ ] mkdir ? - [ ] env vars? - [ ] args possible - [ ] exec - [ ] go runtime and functions access (eg grol extensions) - but not for cvm unlikely/hard: - [ ] threading?