GuestTelemetryMeta is the JSON sidecar contract between the VM runtime and the qmp-collector role. The writer creates and refreshes qmp-telemetry-<instance-id>.json; the collector reads it to locate the dedicated QMP socket, determine the monitoring interval, and select VPC data plane taps. Do not change this JSON shape incompatibly; add a new version when required.

The metrics.ec2.* NATS batch schema is deliberately not owned here yet. Goanna consumes that stream in another repository, so its ownership requires a cross-repository contract decision rather than a Spinifex-only move.