https://elienehme.fr/en/Ideas published on elienehme.fr and publications on Medium and Hashnode, by Elie Nehmeencontact@elienehme.fr (Elie Nehmé)https://elie29.hashnode.dev/plus-le-projet-grossit-plus-l-ia-se-trompehttps://elie29.hashnode.dev/plus-le-projet-grossit-plus-l-ia-se-trompeOn a green-field project, generative AI works wonders; as the project grows, its answers lose accuracy. The model has not changed: what has grown is the context it has to hold. Context Budget, the method I have introduced on several projects, splits the code into bounded contexts the AI can hold in full: the split is paid for once, and each request then pays only for its own context.Fri, 02 Oct 2026 00:00:00 GMTfrhttps://elienehme.fr/en/ideas/when-everyone-ships-a-site/https://elienehme.fr/en/ideas/when-everyone-ships-a-site/Vibe coding lets anyone build a website, but it cannot make that website unique and safeMon, 28 Sep 2026 00:00:00 GMTenhttps://elie29.hashnode.dev/corriger-ou-attenuer-le-cra-ne-laisse-que-deux-reponseshttps://elie29.hashnode.dev/corriger-ou-attenuer-le-cra-ne-laisse-que-deux-reponsesSince 11 September 2026, the Cyber Resilience Act (CRA) has required an early warning within 24h for an actively exploited vulnerability in a product, including products already on the market. Meeting that deadline depends on work done well before the incident: in the delivery chain, in the number of versions maintained, and in whether products can be mitigated without a developer.Fri, 25 Sep 2026 00:00:00 GMTfrhttps://elienehme.fr/en/ideas/a-vision-that-is-not-executed-is-not-one/https://elienehme.fr/en/ideas/a-vision-that-is-not-executed-is-not-one/A vision is only worth what teams can follow: execution that is faithful and practicable, a pragmatic trajectory rather than fine ideas nobody can keep up withWed, 23 Sep 2026 00:00:00 GMTenhttps://elie29.medium.com/from-legacy-artifacts-to-served-context-my-six-stage-method-09f668052904https://elie29.medium.com/from-legacy-artifacts-to-served-context-my-six-stage-method-09f668052904Six stages to build a knowledge graph from C, PL/SQL, PHP and twenty years of documents, keep it true release after release and serve it to an LLM: deterministic collectors, a SHACL gate, append-only facts, and a graph that selects before the model reads.Fri, 18 Sep 2026 00:00:00 GMTenhttps://elienehme.fr/en/ideas/reinventing-what-already-exists/https://elienehme.fr/en/ideas/reinventing-what-already-exists/Rebuilding generic skills that plugins and integrations already provide, and that the next models will absorb, is rarely the right investmentMon, 14 Sep 2026 00:00:00 GMTenhttps://elie29.medium.com/ontology-based-context-engineering-when-rag-is-not-enough-124e6b1de6bbhttps://elie29.medium.com/ontology-based-context-engineering-when-rag-is-not-enough-124e6b1de6bbWhy vector RAG failed on a two-million-line legacy system, and how a small ontology kept in Git, with RDF, SHACL and SPARQL, gives an LLM release-filtered context and a traceable path.Fri, 11 Sep 2026 00:00:00 GMTenhttps://elienehme.fr/en/ideas/if-ai-replaces-developers-who-decides/https://elienehme.fr/en/ideas/if-ai-replaces-developers-who-decides/"AI will replace everyone", or, in the targeted version, "developers". Replacing a profession because its tool can now be generated confuses the twoSun, 30 Aug 2026 00:00:00 GMTenhttps://elie29.medium.com/i-tried-bmad-on-a-real-feature-69afd0ba53b3https://elie29.medium.com/i-tried-bmad-on-a-real-feature-69afd0ba53b3BMAD with Superpowers on a real feature across a Java backend and an Angular frontend: what a formal method adds to a living specification, where the two collide, and what to adopt, adapt or skip.Mon, 24 Aug 2026 00:00:00 GMTenhttps://elie29.medium.com/the-living-specification-how-i-keep-ai-written-code-correct-907be05c9eedhttps://elie29.medium.com/the-living-specification-how-i-keep-ai-written-code-correct-907be05c9eedA living specification, invariants, adversarial AI reviews and real verification keep AI-written code correct, and engineering shifts from writing code to exercising judgement. Second part of a two-article series.Wed, 19 Aug 2026 00:00:00 GMTenhttps://elienehme.fr/en/ideas/code-is-a-means-not-an-end/https://elienehme.fr/en/ideas/code-is-a-means-not-an-end/A developer who only writes code will have less work, or none at all. The question is not whether AI writes the code, but what the developer brings beyond itSun, 16 Aug 2026 00:00:00 GMTenhttps://elie29.medium.com/ai-writes-the-code-so-what-is-the-engineers-job-now-79fa3fdf1b88https://elie29.medium.com/ai-writes-the-code-so-what-is-the-engineers-job-now-79fa3fdf1b88How I asked Claude Code to attack a design instead of building it, the three bugs the adversarial review found before any code, and why engineering is moving from code production to technical validation.Sat, 15 Aug 2026 00:00:00 GMTenhttps://elienehme.fr/en/ideas/competitive-advantage-when-ai-writes-the-code/https://elienehme.fr/en/ideas/competitive-advantage-when-ai-writes-the-code/As AI writes more and more of the code, companies need to rethink where their sustainable competitive advantage will come fromMon, 10 Aug 2026 00:00:00 GMTenhttps://elienehme.fr/en/ideas/patterns-never-make-up-for-a-fragile-foundation/https://elienehme.fr/en/ideas/patterns-never-make-up-for-a-fragile-foundation/Hexagonal architecture, clean architecture, CQRS: powerful patterns, often shown off without the good development practice that holds them upTue, 02 Jun 2026 00:00:00 GMTenhttps://elienehme.fr/en/ideas/what-ai-changes-and-what-it-doesnt/https://elienehme.fr/en/ideas/what-ai-changes-and-what-it-doesnt/A short list of what AI has changed in the work, a shorter one of what it has not, and what that means for the engineer’s jobMon, 02 Feb 2026 00:00:00 GMTenhttps://elie29.hashnode.dev/quand-false-ne-veut-rien-direhttps://elie29.hashnode.dev/quand-false-ne-veut-rien-direWhen a method can fail for several reasons, returning true or false throws away the one thing the caller needs: the cause. Why the boolean return is an anti-pattern, where it comes from, and what to return instead.Thu, 18 Dec 2025 00:00:00 GMTfrhttps://elie29.medium.com/kill-feature-branching-or-die-trying-5da0fe41b806https://elie29.medium.com/kill-feature-branching-or-die-trying-5da0fe41b806Why long-lived feature branches work against continuous delivery, what feature toggles offer instead, and a .NET sample that puts a new feature behind a request header in five steps.Mon, 12 May 2025 00:00:00 GMTenhttps://elie29.hashnode.dev/la-cicd-nest-pas-une-prioritehttps://elie29.hashnode.dev/la-cicd-nest-pas-une-prioriteSetting up CI/CD is often a team’s first DevOps reflex, and often premature: what a real pipeline is, what must be settled first, and why the persistence layer and the infrastructure deserve their own care.Wed, 07 May 2025 00:00:00 GMTfrhttps://elie29.hashnode.dev/justifier-le-craftsmanship-aupres-des-dsi-roi-contexte-et-impact-reelhttps://elie29.hashnode.dev/justifier-le-craftsmanship-aupres-des-dsi-roi-contexte-et-impact-reelA CTO who cannot demonstrate the ROI of Sonar and GitLab, a director who cannot quantify the benefits of pair programming: why Craftsmanship must be justified by the business problems it solves, and measured on two levels.Thu, 01 May 2025 00:00:00 GMTfrhttps://elie29.hashnode.dev/building-a-resilient-site-aware-synchronizationhttps://elie29.hashnode.dev/building-a-resilient-site-aware-synchronizationSeveral on-premise sites, each with its own database, that must keep working through days of network outage and still converge: an outbox table, a RabbitMQ cluster, a fanout exchange, idempotent consumers and a golden source for replaying events.Mon, 14 Apr 2025 00:00:00 GMTenhttps://elienehme.fr/en/ideas/moving-to-the-cloud-is-not-moving-the-servers/https://elienehme.fr/en/ideas/moving-to-the-cloud-is-not-moving-the-servers/Putting everything on infrastructure as a service, or containerising everything as is with huge images, is not a migration: it is a move that costs moreSat, 02 Mar 2024 00:00:00 GMTenhttps://elienehme.fr/en/ideas/a-user-story-is-not-a-technical-task-list/https://elienehme.fr/en/ideas/a-user-story-is-not-a-technical-task-list/Code, test, describe the implementation: repeated in every user story, these tasks bring no business value, and Jira is not a development toolTue, 10 Oct 2023 00:00:00 GMTenhttps://elie29.hashnode.dev/strategie-de-deploiement-bluegreenhttps://elie29.hashnode.dev/strategie-de-deploiement-bluegreenBeyond the textbook definition: the decisions a team must take, component by component, for Blue/Green to work in practice, from persistence compatibility and sessions to decommissioning and rollback.Sun, 27 Aug 2023 00:00:00 GMTfrhttps://elienehme.fr/en/ideas/why-architecture-reviews-often-fail/https://elienehme.fr/en/ideas/why-architecture-reviews-often-fail/Reviews happen at the wrong time, with the wrong question. What has made them useful in my experienceMon, 06 Feb 2023 00:00:00 GMTenhttps://elie29.hashnode.dev/java-functional-programming-to-leverage-polymorphismhttps://elie29.hashnode.dev/java-functional-programming-to-leverage-polymorphismHow a factory’s switch statement grows with every new case, and how a map of functional interfaces, then an enum, keeps its complexity constant however many types you add.Wed, 13 Apr 2022 00:00:00 GMTenhttps://elie29.medium.com/apache-kafka-along-with-rxjs-operators-31c00d46c35ahttps://elie29.medium.com/apache-kafka-along-with-rxjs-operators-31c00d46c35aA Kafka processor between two topics must not lose a message while its producer is paused: why takeUntil, switchMap and combineLatest all drop data, and how windowToggle and bufferToggle keep it.Thu, 24 Mar 2022 00:00:00 GMTenhttps://elienehme.fr/en/ideas/the-hidden-cost-of-technical-decisions/https://elienehme.fr/en/ideas/the-hidden-cost-of-technical-decisions/The price of a technical decision is what it does to every decision that follows. Three questions to ask before making oneThu, 11 Nov 2021 00:00:00 GMTenhttps://elie29.medium.com/deploy-quarkus-application-with-gitlab-ci-to-heroku-paas-72c0e9214669https://elie29.medium.com/deploy-quarkus-application-with-gitlab-ci-to-heroku-paas-72c0e9214669From an empty Quarkus project to three Heroku environments with one GitLab-CI pipeline: branch and tag rules, protected variables, dependency caching and free-tier security scans.Sat, 03 Apr 2021 00:00:00 GMTenhttps://elie29.medium.com/frontend-jwt-token-storage-77cbe6dc680bhttps://elie29.medium.com/frontend-jwt-token-storage-77cbe6dc680bLocal storage, session storage and plain cookies leave a JWT open to theft: three ways to hold the token in a browser (a closure, a secure cookie, a service worker) and what each one trades away.Sun, 14 Mar 2021 00:00:00 GMTenhttps://elienehme.fr/en/ideas/what-makes-a-codebase-evolvable/https://elienehme.fr/en/ideas/what-makes-a-codebase-evolvable/Evolvability is measured by doing, not read off a diagram. Five unglamorous traits of codebases that age wellThu, 02 Apr 2020 00:00:00 GMTenhttps://elie29.medium.com/refactoring-from-strategy-to-interpreter-pattern-with-jest-testing-tool-58ef7bf0f2fbhttps://elie29.medium.com/refactoring-from-strategy-to-interpreter-pattern-with-jest-testing-tool-58ef7bf0f2fbEvaluating arithmetic expressions with operator precedence: from a switch that breaks the open/closed principle to polymorphism, then a lexer, a parser and an interpreter, each step checked by Jest tests.Sun, 25 Nov 2018 00:00:00 GMTenhttps://elie29.medium.com/refactoring-how-to-avoid-nested-or-several-conditionals-within-a-function-a25df6c27f62https://elie29.medium.com/refactoring-how-to-avoid-nested-or-several-conditionals-within-a-function-a25df6c27f62Two ways out of the pyramid of doom: a small assertion function that chains instead of nesting, and conditions turned into getters so that Math.max replaces the branching.Mon, 05 Nov 2018 00:00:00 GMTenhttps://elie29.medium.com/object-calisthenics-one-level-but-how-can-we-manage-to-exit-a-loop-4485dbaf7f7dhttps://elie29.medium.com/object-calisthenics-one-level-but-how-can-we-manage-to-exit-a-loop-4485dbaf7f7dOnly one level of indentation per method, and still a way out of a loop: array_reduce or recursion instead of a nested early return, with the cost of each measured on fifty thousand elements.Tue, 30 Oct 2018 00:00:00 GMTen