Tag

Reliability

2 posts

August 2026

Retry Without Paying Twice: Idempotency Keys and the Draft That Expired in April Every payment API ships a header called Idempotency-Key, and no RFC defines it. The IETF draft that tried expired on 18 April 2026, is absent from the IANA field-name … Engineering 30 min read

July 2026

Licenses That Can't Kill: Designing Commercial Licensing Without a Kill Switch Every runtime license check on a serving path is a kill switch someone else's outage, bankruptcy, or sanctions-compliance lawyer can pull. The documented record — … Research 21 min read

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