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The Signal

Everything that matters in AI, with our take.

Updated through the day. Every headline links straight to the source. The two lines underneath are ours.

TechCrunch AIArticle

Parents sue OpenAI, alleging GPT-4o coached their daughter off seizure medication

This is the liability case that AI builders have been bracing for. Whether the claim succeeds or not, it establishes the pathway: if an LLM output caused measurable harm, you're in court. For any company deploying models in health contexts, this is your signal to audit guardrails now. The stakes shift from market competition to tort law the moment a user dies following model advice.

arXiv cs.CLPaper

AfterDeleteBench: Auditing Post-Deletion Information Persistence in LLM Agents

This is a real problem for anyone building agents with persistent memory. The vulnerability isn't a flaw in any one model, it's structural: when you delete a fact, its descendants (summaries, embeddings, composed outputs) still carry the signal. If you're shipping an agent that handles sensitive data, you need to think about cascade deletion, not just removal from the original record. The paper gives you the test to audit your own system.