Release contract

This is the static file layout that the current shell installer and spio prebuilt tool installer consume.

spio installer paths

tools/spio/install-spio.sh
tools/spio/channel/latest/<platform>/version
tools/spio/releases/<version>/<platform>/spio
tools/spio/releases/<version>/<platform>/spio.sha256
tools/spio/latest.json

Styio compiler paths

tools/<release-target>/channel/stable/<platform>/version
tools/<release-target>/releases/<version>/<platform>/styio
tools/<release-target>/releases/<version>/<platform>/styio.sha256
tools/<release-target>/latest.json

Release targets

Target	Purpose	Initial status
`styio-linux`	Linux CLI, including glibc and musl platform keys.	arm64 alpha
`styio-macos-cli`	macOS command-line compiler.	Apple Silicon alpha
`styio-macos-desktop-gui`	Future macOS desktop application.	reserved
`styio-windows-cli`	Future Windows command-line compiler.	reserved
`styio-windows-desktop-gui`	Future Windows desktop application.	reserved
`styio-ios`	Future iOS client package.	reserved
`styio-android`	Future Android client package.	reserved

Validation rules

Every channel pointer is a text file whose first field is a safe version segment.
Every binary has a sibling .sha256 text file.
Platform keys use darwin-aarch64, linux-aarch64, or linux-musl-aarch64 for the first alpha.
Release-root bundles are extracted into the Pages artifact, not committed to Git.