agentfootprint/dist/core/agent/window/removal.js

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

"use strict";
/**
 * window/removal — "these messages left" → the facts the ledger needs.
 *
 * Pattern: Pure function over the meter's provenance.
 * Role:    core/ layer. The stage binds this into every
 *          `WindowStrategyInput.removalFacts`, so a strategy can name what it
 *          removed without ever touching the meter — and cannot file a
 *          removal it is unable to name.
 * Emits:   N/A.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.indexRange = exports.removalFacts = void 0;
/**
 * Resolve which stages wrote the removed messages, and how long each lived.
 *
 * `survivalMs` is measured (`atMs - bornAtMs`), and is 0 — not a guess — when
 * a message's birth is unknown, which happens only for a window seeded from
 * outside this run.
 */
function removalFacts(origins, indices, atMs) {
    const removedStageIds = [];
    const evictions = [];
    for (const index of indices) {
        const origin = origins[index];
        if (origin !== undefined && !removedStageIds.includes(origin.stageId)) {
            removedStageIds.push(origin.stageId);
        }
        evictions.push({
            index,
            survivalMs: origin === undefined ? 0 : Math.max(0, atMs - origin.bornAtMs),
        });
    }
    return { removedStageIds, evictions };
}
exports.removalFacts = removalFacts;
/** `[from, toExclusive)` as a list of indices. */
function indexRange(from, toExclusive) {
    const out = [];
    for (let i = from; i < toExclusive; i++)
        out.push(i);
    return out;
}
exports.indexRange = indexRange;
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