Summary

Implement the Preview 3 draft wasi:cli package so command-style components can consume environment, stdio, exit, and terminal interfaces through the current RC WIT surface.

Parent tracking issue: #70
Suggested implementation order: 11 / 14

References

• https://github.com/WebAssembly/WASI/blob/main/docs/Preview2.md
• https://github.com/WebAssembly/wasi-cli/tree/v0.3.0-rc-2025-09-16
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/README.md
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/command.md
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/imports.md
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/wit-0.3.0-draft/imports.wit
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/wit-0.3.0-draft/command.wit
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/wit-0.3.0-draft/environment.wit
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/wit-0.3.0-draft/stdio.wit
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/wit-0.3.0-draft/terminal.wit
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/wit-0.3.0-draft/exit.wit
• https://github.com/WebAssembly/wasi-cli/blob/v0.3.0-rc-2025-09-16/wit-0.3.0-draft/run.wit

Acceptance criteria

• The wasi:cli draft interfaces instantiate through the Preview 3 host binding scaffolding on native, web, and node backends.
• Node support is provided through JS interop host adapters rather than node:wasi.
• Focused tests cover representative command startup, environment, stdio, exit, and terminal flows against the RC WIT surface.