Optionalprobe: AdapterProbeResult
Optional probe result with pre-collected version to avoid re-invoking --version.
Optionalcontext: BackendReadContext
Optional cancellation and deadline context (EXEC-001-T08d).
Measured quota, or undefined when the CLI is older than the verified version,
the run reports a model turn or cost, or it prints no limits (API-key billing).
Reads subscription limits from
claude -p /usage, a local command that makes no model call.