Notes

Working knowledge

Written from systems I have built and run, using the code that is actually in them. There are few of these, and only when there is something specific to say.

Sep 2026

How I made a webhook-driven workflow safe to retry

Raw-body signature checks, duplicate delivery, idempotency keys taken from business identity, retry ceilings with somewhere to land, and why reconciliation is what makes a missed event survivable.

8 min