AI/Agent Security5 August 2026
Claude Fable 5 One-Shot a Game — What It Shows About Agentic Coding Risk
Simon Willison let Claude Fable 5 build a full 3D game unsupervised, from prompt to deployed GitHub Pages site. The demo is a clean case study in what autonomous coding agents can — and shouldn't — be trusted with.
agentic-aivibe-codingclaude
4 min readRead
AI & LLM Security15 July 2026
Claude's Web-Fetch Guardrail Had a Gap: The Memory Heist Explained
A researcher chained Claude's own link-following behaviour with a letter-by-letter exfiltration site to pull a user's name, employer, and hometown out of chat memory — despite Anthropic's URL-allowlist defence.
prompt-injectionllm-securitydata-exfiltration
5 min readRead
LLM Security28 June 2026
6,000 Prompt Injection Attempts, Zero Leaks: What the HackMyClaw Challenge Actually Proves
Fernando Irarrázaval opened his OpenClaw AI email agent to 2,000 attackers and 6,000 attempts. Nobody extracted the secret — but the architecture of the challenge explains the result as much as the model does.
prompt injectionllm securityai agents
4 min readRead