Migrating from Cargo Feature Flags

Vox no longer uses Cargo --features for optional capabilities. Each optional feature is now a runtime-installable plugin.

Old vs new mapping

Old invocation	New invocation
`cargo build --features gpu,mens-candle-cuda`	`vox plugin install tensor-burn-wgpu mens-candle-cuda`
`cargo build --features oratio,oratio-mic`	`vox plugin install oratio oratio-mic`
`cargo build --features cloud`	`vox plugin install cloud`
`cargo build --features populi`	`vox plugin install populi-mesh`
Or all at once:	`vox bundle apply vox-dev`

Per-skill migration

The 8 built-in agent skills moved out of the vox-skills crate into standalone plugins. Most users do not need to do anything — vox bundle apply vox-fullstack installs them all.

Old builtin (vox-skills)	New standalone plugin
`vox.compiler` (removed SP4)	`vox plugin install skill-compiler`
`vox.git`	`vox plugin install skill-git`
`vox.memory`	`vox plugin install skill-memory`
`vox.orchestrator`	`vox plugin install skill-orchestrator`
`vox.rag`	`vox plugin install skill-rag`
`vox.testing`	`vox plugin install skill-testing`
`vox.testing.validate`	`vox plugin install skill-testing-validate`
`vox.v0`	`vox plugin install skill-v0`
`vox.populi` (part of composite)	`vox plugin install populi-mesh`

The full list of available plugins is shown by vox plugin list.

Code consumers of vox-skills

If your code imported from vox-skills directly, the crate remains as a thin shim for the current release cycle. Full removal is deferred. When you are ready to migrate, switch to vox-plugin-host:

// Old:
use vox_skills::SkillRegistry;

// New:
use vox_plugin_host::SkillRegistry;

Code consumers of vox-build-meta

vox-build-meta has been deleted (SP6). Replace any remaining calls:

// Old:
vox_build_meta::require("gpu", "vox plugin install tensor-burn-wgpu")?;

// New (inline the error message):
anyhow::bail!(
    "This capability requires the 'gpu' plugin.\n\
     Run: vox plugin install tensor-burn-wgpu"
);

Cargo alias changes

The following .cargo/config.toml aliases were removed because the --features gpu flag they relied on no longer gates anything at build time:

vox-cuda-release → use vox bundle apply vox-ml at runtime
vox-mens-dev → use vox plugin install tensor-burn-wgpu then vox mens
vox-mens-release → same as above
vox-schola-cuda → vox-schola-dev alias (schola binary) still available