CLI, Files, Env, And Text

Current implementation evidence: examples/argv.0x0, examples/env.0x0,

examples/stdin.0x0, examples/file-io.0x0, examples/safe-file.0x0, and

docs/language.html.

CLI Arguments

Use the current argv builtin surface where examples demonstrate it. Treat CLI

input as boundary data and validate before passing it into pure logic.

Environment

Environment access is effectful. Keep environment reading near the boundary and

pass validated values into pure functions.

Stdin And Stdout

Stdin and print examples exercise observable I/O. Public examples should state

expected input and output.

Files

File helpers are effectful and should use safe path/file conventions where

available. See examples/file-io.0x0 and examples/safe-file.0x0.

Text

The current language includes text helpers such as length, slicing,

concatenation, equality, and integer conversion. Use the language guide for the

current builtin list.

Practical Rule

Keep CLI, environment, stdin, stdout, and file access out of pure core logic.

Parse and validate at the edge, then call pure helpers with explicit values.