- `nolambda:fs:read`: Accepts a file name (arbirary value, converted to string) as $0 and returns it's contents as a string. Causes an error if the file does not exist.
- `nolambda:fs:write`: Accepts a file name (arbirary value, converted to string) as $0 and overwrites it with the contents in $1 (arbirary value, converted to string). Causes an error if the file could not be written. Returns `:nil:nil`.
- `nolambda:fs:read`: Accepts a file name (arbirary value, converted to string) as $0 and returns it's contents as a string. Causes an error if the file does not exist.
- `nolambda:fs:write`: Accepts a file name (arbirary value, converted to string) as $0 and overwrites it with the contents in $1 (arbirary value, converted to string). Causes an error if the file could not be written. Returns `:nil:nil`.