Development

Masking an agent's own past actions stops it mistaking hallucination for memory

development2026-05-18

Claim

Microsoft's Nando de Freitas reported that one line of code is all it takes to prevent agent delusions, by masking an agent's past actions from its history so it stops mistaking hallucinations for memory.

Reporting date: 2026-05-18 (not necessarily the event date)

Sources

Attribution and reporting linked by this record; links do not imply independent verification.

Welcome to May 18, 2026 (theinnermostloop.substack.com)

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Reported in

Welcome to May 18, 2026

Actor

Microsoft

Evidence for

Supersedes

A compact memory state is grafted onto a frozen model

Referenced by

Welcome to May 18, 2026

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Citation formatCitation text

Masking an agent's own past actions stops it mistaking hallucination for memory
Innermost Loop KB — secondary record
Reporting date: 2026-05-18
KB permalink: https://nicholsn.github.io/innermost-loop-kb/developments/2026-05-18-one-line-of-code-against-delusions
Claim: Microsoft's Nando de Freitas reported that one line of code is all it takes to prevent agent delusions, by masking an agent's past actions from its history so it stops mistaking hallucinations for memory.
Attributed sources:
- Welcome to May 18, 2026 — https://theinnermostloop.substack.com/p/welcome-to-may-18-2026
This citation does not imply independent verification of linked-source claims.

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