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 Security13 July 2026
AI Coding Agents Are Boosting Commit Velocity — And Security Debt With It
A viral GitHub commit-frequency chart shows how much modern coding agents accelerate output. Independent testing suggests the code behind that velocity still fails basic security checks at a striking rate.
ai-securityvibe-codingsecure-code-review
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AI-Generated Code Security7 July 2026
Simon Willison's One-Prompt Web Component Is a Vibe-Coding Security Lesson
A GPT-5.5-generated Web Component that fetches and renders raw GitHub file content client-side is a small, telling example of how little scrutiny 'vibe-coded' front-end code gets before it ships.
vibe-codingllm-generated-codedom-xss
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