Enum Readiness 

pub enum Readiness {
    Ready,
    Skipped(String),
    Idle,
}

Whether a check can run against a document — decided by the runner before run, so requirement diagnostics are emitted in one place and never subject to per-check severity overrides.

Variants

Ready

Requirements met; run the check.

Skipped(String)

The check has pending work (relevant expectations are declared) but a prerequisite — a rig role — is unresolved. The runner emits one standardized skip-note carrying reason at Note severity, exempt from overrides. reason states what is needed.

Idle

No pending work for this document/config; stay silent.