Metrics, runtime events and collection hints

Use live values for the current state and history for trends.

Key metrics

• Hashrate, temperature, fan speed, power and accepted/rejected/invalid shares.
• A missing value is different from a measured zero.

Runtime events

• Events record transitions such as apply attempts, MINER exits and recovery.
• They do not replace the latest state.

Collection hints

• A collection hint explains why a field is unavailable, for example unsupported hardware, missing command or stale telemetry.