Lians vs Hindsight.
Hindsight is agent memory that learns, scored on the same five invariants we score ourselves. Credit where it's strong, receipts where it isn't.
Credit first
Where Hindsight is genuinely strong.
Hindsight offers timestamped retention, four retrieval strategies, and belief revision that preserves history.
Regulated-memory eval · last run 2026-07-04
The five invariants.
| Regulated invariant | Lians | Hindsight |
|---|---|---|
| Stale revision suppressed | pass | partial |
| Point-in-time (as-of) recall | pass | partial |
| Provable erasure (crypto-shred + cert) | pass | absent |
| Lookahead / backtest guard | pass | absent |
| Audit-state snapshot at T | pass | absent |
| Score (pass = 1, partial = ½) | 5.0 / 5 | 1.0 / 5 |
Where the lanes diverge
Different jobs, different guarantees.
It cannot reconstruct belief as of a past date and exposes no public erase API. Revision is reflective, not deterministic supersession.
The honest recommendation
Which should you pick?
Choose Hindsight for learning agents. Choose Lians for deterministic revisions, provable erasure, and historical reconstruction.