AI Security & Governance2 September 2026
Anthropic Hardens Claude's System Prompt Against Song Lyrics
A September 2026 update to Claude Fable 5.1's system prompt adds a persistent, decomposition-resistant refusal for song lyrics, poems, and copyrighted visuals — a public case study in guardrail engineering under litigation pressure.
ai-securityllm-guardrailsprompt-engineering
4 min readRead
AI Agent Security2 July 2026
Why SQL-Executing AI Agents Need Systematic Prompt Testing, Not Guesswork
A DSPy-driven experiment on Datasette Agent's SQL system prompt shows how ad hoc prompt tuning produces fragile, unpredictable guardrails for agents that touch live data.
ai-agentsllm-securityprompt-engineering
4 min readRead