Memory benchmark · RAMR
RAMR — Retrieval-Augmented Memory Reliability: a contamination-resistant benchmark for agentic-RAG and memory systems.
Items are random synthetic tokens, so no model can have memorized the answers — it isolates the retrieval/memory mechanism. Nine metrics, runnable, MIT. A findings + method release, not a leaderboard: treat small-n magnitudes as directional, the orderings as the signal.
Lead finding · across the models we tested
One missing hop collapses 3-hop retrieval — chain-fragility +1.000 (CI [1.000, 1.000]), n=200.
Identical on a 30B local model and a frontier model. A recall miss on a single linked fact is near-total, not graceful — completeness of the chain matters far more than how clean the context looks.
- CONVERSION
complete retrieval converts to a correct multi-hop answer (gold accuracy 1.000, n=40).
- CHAIN-FRAGILITY
one missing hop → near-total collapse (+1.000, CI [1.000,1.000], n=200).
- DISTRACTION
cost of noisy context is model-specific (+0.15 to +0.60 across models).
- FACT-RETENTION
compaction is lossy under a fixed budget (+0.70 loss at a 400-char budget).
- OUTCOME-RANKED-RECALL
ranking recall by was-it-right beats was-it-recalled (+0.345 to +0.500; CIs exclude 0).
- FORGET-PRECISION
after a fact is updated, does recall return the current value — this caught and fixed a value-update gap in our own inspeximus.
- COMPRESSION-vs-RAW
under heavy noise a compiled summary loses to the raw context, it doesn't beat it (−0.55 at 50 distractors, n=20).
- TEMPORAL-AS-OF
out-of-order ingest: supersession must resolve by validity-time, not arrival order (bi-temporal) — the same discipline now shipped in inspeximus v0.2.
- OPERATIONAL-CONTINUITY
on resume after compaction, an already-completed action is not re-executed (idempotent resume).
v0.4 also ships the Folklore Meter — a reusable probe that scores any AI-engineering folklore claim against a runnable test (real / weak-model-artifact / regime-specific) — and a shared, sha256-pinned RAMR↔LS evidence-fixture set built in collaboration with the LS project.