> ## Documentation Index
> Fetch the complete documentation index at: https://doc.blankstate.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Metamarkers

> Granular evidence. The grain beneath a score.

A metamarker is one detected nuance activation in an interaction. It is the billable unit.

A score summarises what happened. Metamarkers show where it happened, at what intensity, on which content segment, and with what fidelity.

## Structure

```json theme={null}
{
  "id": "mm_a1b2c3",
  "protocol": "empathy",
  "nuance": "acknowledges-emotional-state",
  "dimension": "B",
  "score": 0.74,
  "fidelity": 0.91,
  "segment": {
    "start": 0,
    "end": 142,
    "text": "I understand this decision has been difficult..."
  }
}
```

## Fields

| Field       | Description                                     |
| ----------- | ----------------------------------------------- |
| `protocol`  | Protocol that produced the detection            |
| `nuance`    | The axis activated                              |
| `dimension` | `C` Cognitive, `B` Behavioural, `I` Intentional |
| `score`     | Activation strength 0–1                         |
| `fidelity`  | Reliability of this specific detection 0–1      |
| `segment`   | Source evidence: offset, length, and text       |

## Billing

Each unique nuance activation per interaction is one ICS. Low-fidelity activations below the Protocol's fidelity threshold are suppressed and not billed.