stop muting your users with local license validation

Before I explain what I built, I have two dev stories. First: a producer on a flight to Berlin opens his synth plugin mid-track. The developer had auth wired to a v1/validate endpoint. JWT expired. No Wi-Fi. Plugin interprets a 401 as an unlicensed state and mutes. Paying customer, silenced over the Atlantic. Second: a film composer drives to a remote recording session and realizes his iLok dongle is on his desk at home. Switches to cloud mode. Studio router reboots mid-take. Session dead. Here is how the Archergate SDK handles this differently. First validation calls home, binds the key to a machine fingerprint, and writes an HMAC-signed receipt to disk. Every launch after that reads the receipt locally. No network call. After 30 days it checks in once and refreshes. The producer on the plane gets a valid receipt, and the composing session in the studio survives a router reboot. The SDK is free and Rust for memory safety without a garbage collector. Under 200KB compiled, no runtime, C