name	portable-safe-skills
description	Create portable, safe Codex skills focused on file or I/O operations under WASIp1 constraints. Use when authoring skills that must be portable across environments and avoid unsafe assumptions about paths, preopens, or stdio.

Portable and Safe Skills

Use mbt-wasip1-tools for concrete CLI patterns (echo, wc, read/write) and example project structure.

WASIp1 path resolution uses longest-prefix matching against preopen names. No cwd. No fallback.
Absolute paths only work if a preopen named / (or starting with /) exists.
Stdio is unified: @wasi/stdio values implement both sync and async reader/writer traits.

Start from an assets/ example in mbt-wasip1-tools.
Keep logic simple and deterministic; only I/O is async.
Document the required wasmtime run --dir host::guest usage and expected preopens.
Add a README to each example with build/run commands.
Package the skill using the skill-creator guidelines when done.

name	portable-safe-skills
description	Create portable, safe Codex skills focused on file or I/O operations under WASIp1 constraints. Use when authoring skills that must be portable across environments and avoid unsafe assumptions about paths, preopens, or stdio.

Use mbt-wasip1-tools for concrete CLI patterns (echo, wc, read/write) and example project structure.

WASIp1 path resolution uses longest-prefix matching against preopen names. No cwd. No fallback.
Absolute paths only work if a preopen named / (or starting with /) exists.
Stdio is unified: @wasi/stdio values implement both sync and async reader/writer traits.

Start from an assets/ example in mbt-wasip1-tools.
Keep logic simple and deterministic; only I/O is async.
Document the required wasmtime run --dir host::guest usage and expected preopens.
Add a README to each example with build/run commands.
Package the skill using the skill-creator guidelines when done.

portable-safe-skills