Open-Source Article 12 Logging Infrastructure for the EU AI Act
EU legislation (which affects UK and US companies in many cases) requires being able to truly reconstruct agentic events. I've worked in a number of regulated industries off & on for years, and recently hit this gap. We already had strong observability, but if someone asked me to prove exactly what happened for a specific AI decision X months ago (and demonstrate that the log trail had not been altered), I could not. The EU AI Act has already entered force, and its Article 12 kicks-in in August this year, requiring automatic event recording and six-month retention for high-risk systems,…
Open-Source Article 12 Logging Infrastructure for the EU AI Act launched on March 3, 2026 with 42 votes, #740 of 23,380 launches that month and more than 95% of that year's launches.
In plain words
This open-source TypeScript library helps developers meet EU AI Act Article 12 requirements by creating append-only logs of AI inference events for high-risk systems. Built for Node.js applications using the Vercel AI SDK, it captures and preserves a tamper-evident record of AI decisions that can be reconstructed and audited months later. The tool addresses a compliance gap where standard observability solutions cannot reliably prove what an AI system did or verify that logs remain unaltered, requirements that take effect in August 2024 for regulated AI systems.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
EU legislation (which affects UK and US companies in many cases) requires being able to truly reconstruct agentic events. I've worked in a number of regulated industries off & on for years, and recently hit this gap. We already had strong observability, but if someone asked me to prove exactly what happened for a…
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