/blog/ Recent content in Blog on Erwan Joly Hugo en-us Sun, 12 Jul 2026 00:00:00 +0000 /blog/cron-is-stateless-your-mortgage-isnt/ Sun, 12 Jul 2026 00:00:00 +0000 /blog/cron-is-stateless-your-mortgage-isnt/ Why cron can't express 'every second Friday', why that's a feature and not a bug, and why I ended up replacing cron with RFC 5545 RRULEs in WealthRelay - then open-sourcing a React form to edit them. /blog/risk-is-a-terrible-word-for-volatility/ Sun, 12 Jul 2026 00:00:00 +0000 /blog/risk-is-a-terrible-word-for-volatility/ Finance says 'risk' and means 'standard deviation'. Everyone else hears 'chance of losing everything'. That one mistranslation makes cash look safe, index funds look like gambling, and a yen look calmer than it is - depending on where you're standing. /blog/sso-account-prehijacking/ Thu, 18 Jun 2026 00:00:00 +0000 /blog/sso-account-prehijacking/ Account pre-hijacking is not one attack: it's two, with very different preconditions and severity. Here's how to tell them apart, why triagers keep getting it wrong, and how to reproduce both from scratch. /blog/hotchocolate-graphql-to-react-form/ Thu, 01 Sep 2022 00:00:00 +0000 /blog/hotchocolate-graphql-to-react-form/ Turn any GraphQL mutation or query into a rendered React form using schema introspection, graphql-to-json-schema, and react-jsonschema-form - no hand-written UI per operation. /blog/hotchocolate-validation-attributes/ Wed, 31 Aug 2022 00:00:00 +0000 /blog/hotchocolate-validation-attributes/ How to expose .NET ValidationAttributes as GraphQL schema directives and generate matching Yup validators automatically - so the frontend never drifts from the backend rules.