agentfootprint/dist/esm/memory/beats/types.js

The explainable agent framework — backtrack a wrong answer to the exact context that caused it (evidence, not guesses). Built on footprintjs.

/**
 * Narrative beats — the unit of narrative memory.
 *
 * A `NarrativeBeat` is a self-contained summary extracted from one or
 * more messages during a turn. Instead of persisting raw conversation
 * forever, a narrative pipeline compresses each turn into beats and
 * recalls them by composing beats back into a coherent story.
 *
 * Core properties:
 *   - **Summary**: a single sentence describing what happened.
 *   - **Importance**: 0..1 score the picker uses to prefer salient
 *     beats when the context-token budget is tight.
 *   - **Refs**: ids of the source messages the beat was extracted
 *     from. Lets consumers walk backwards from a recalled beat to
 *     the raw source — the explainability story.
 *   - **Category**: optional free-form tag (e.g. `"identity"`,
 *     `"preference"`, `"fact"`). Extractors / consumers pick their
 *     own taxonomy.
 *
 * Beats are persisted via the ordinary `MemoryStore` interface —
 * `MemoryEntry<NarrativeBeat>` slots in unchanged. No storage changes
 * needed to support narrative memory.
 */
/**
 * Clamp a value to the valid [0, 1] importance range. Non-finite
 * inputs collapse to 0.5 (neutral) so extractors that produce NaN
 * / ±Infinity don't poison the picker's comparisons.
 */
export function asImportance(value) {
    if (typeof value !== 'number' || !Number.isFinite(value))
        return 0.5;
    if (value < 0)
        return 0;
    if (value > 1)
        return 1;
    return value;
}
/**
 * Duck-typed guard — true iff `value` has the shape of a
 * `NarrativeBeat`. Used by pipelines that handle mixed-payload stores
 * (raw messages + beats) to route entries correctly.
 */
export function isNarrativeBeat(value) {
    if (!value || typeof value !== 'object')
        return false;
    const v = value;
    return typeof v.summary === 'string' && typeof v.importance === 'number' && Array.isArray(v.refs);
}
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