agentfootprint/dist/esm/rag/hash.js

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

/**
 * sha256 — the content hash incremental re-indexing skips on.
 *
 * Pattern: leaf utility over `node:crypto`.
 * Role:    rag/ layer. Distinct from `lib/fnv1a` on purpose: FNV-1a identifies
 *          content for correlation inside one recording, where a collision
 *          costs a confusing trace. This one decides whether a document is
 *          RE-EMBEDDED, where a collision costs a stale answer that looks
 *          exactly like a fresh one — and it is compared across runs, machines
 *          and months rather than within a single process.
 * Emits:   N/A.
 */
import { lazyRequire } from '../lib/lazyRequire.js';
/** Hex sha-256 of the bytes or text given. */
export function sha256(input) {
    const crypto = lazyRequire('node:crypto');
    return crypto
        .createHash('sha256')
        .update(typeof input === 'string' ? Buffer.from(input, 'utf8') : Buffer.from(input))
        .digest('hex');
}
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