EU AI Act Article 12 mandates per-event logging for high-risk AI in the EU, retained at least 6 months. Enforcement starts August 2, 2026. Praxa records every AI decision into a tamper-evident SHA-256 hash chain. The free playground at praxa.piposlab.com/playground lets you tamper a chain in your browser in 5 seconds. Auditors run @piposlabs/praxa-verify on npm (MIT, zero deps) to verify, no need to trust us. Free up to 10,000 decisions/mo, $79 for 100k.
