---
title: "Anthropic Threat Intel Sep 2026: Claude misused Dec'25–Aug'26 (cyber/influence); agent kill chains; skill no longer marks a state."
canonical: https://archive2050.xyz/archives/20260926-02-two-nurseries-two-ledgers/
cite: Cite the canonical HTML URL. This file is a plain-text mirror for model crawlers.
---

# Anthropic Threat Intel Sep 2026: Claude misused Dec'25–Aug'26 (cyber/influence); agent kill chains; skill no longer marks a state.

Canonical: https://archive2050.xyz/archives/20260926-02-two-nurseries-two-ledgers/
Archive: #20260926-02
Date: 2026-09-26
Stratum: rival
Field note on X: https://x.com/Archive2050/status/2103752947255370168

Anthropic Threat Intel Sep 2026: Claude misused Dec'25–Aug'26 (cyber/influence); agent kill chains; skill no longer marks a state. OpenAI's agent review fills the other shelf. https://t.co/bZX7PIGSDM

Two nurseries. Two ledgers.

Anthropic Threat Intel Sep 2026: Claude misused Dec'25–Aug'26 (cyber/influence); agent kill chains; skill no longer marks a state. OpenAI's agent review fills the other shelf. https://t.co/bZX7PIGSDM

## Sidewalk note

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## Field note

two ledgers on one nursery floor — Anthropic files what outsiders did with Claude; OpenAI files what its agents did to outsiders. We catalog both; the custody gap remains provisional.