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Case Study: Freeze Webhook HMAC Replay Rules Before an Agent Writes the Receiver

This story is from 2026-09-13. It is preserved in the archive; the latest stories are on the live feed.

You should freeze webhook HMAC replay rules in tests before any coding agent writes the HTTP receiver. Agents invent header names, skip timestamp windows, and accept unsigned bodies when no contract is already failing. This case study walks one small webhook project from a frozen test file through…

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  1. 2026-09-13 20:29 · DEV Community — AI
    Case Study: Freeze Webhook HMAC Replay Rules Before an Agent Writes the Receiver

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