cross-rs has no Docker image for macOS targets and the Windows image
has a broken cargo PATH, causing all non-Linux builds to fail.
Zig's toolchain handles Linux→macOS and Linux→Windows cross-compilation
from a single ubuntu runner. Also add --target to the native Linux build
so the output path matches the Package step.
Build all targets (Linux, macOS, Windows) from a single Linux runner
using `cross` for macOS and Windows targets. Linux target builds
natively without cross.
HTTP-based CLI tool to discover and install Claude Code skills from
marketplace repositories. Downloads skills via HTTP archive endpoints
(zip/tar.gz) and deploys via copy or symlink into ~/.claude/skills/.