Essays, research, and build logs on agentic software engineering.https://dcsg.me/https://dcsg.me/writing/edikt-governance-layer-for-agentic-engineering/https://dcsg.me/writing/edikt-governance-layer-for-agentic-engineering/I didn't set out to build a governance tool. I set out to understand why my AI agent kept ignoring rules I'd already written down.Wed, 01 Apr 2026 00:00:00 GMThttps://dcsg.me/writing/experiments-on-ai-agents-and-architecture/https://dcsg.me/writing/experiments-on-ai-agents-and-architecture/I ran 9 controlled experiments to measure how AI agents handle architecture. Same model, same task, one variable changed. I published every result — validated, partial, null.Sun, 01 Mar 2026 00:00:00 GMThttps://dcsg.me/writing/why-i-built-archway/https://dcsg.me/writing/why-i-built-archway/I didn't set out to build an architecture tool. I set out to understand why AI agents keep making structural decisions without understanding the architecture.Sun, 01 Mar 2026 00:00:00 GMThttps://dcsg.me/writing/one-year-phplx/https://dcsg.me/writing/one-year-phplx/Was exactly one year ago — December 6, 2012 — when the first phplx meetup happened, selling out in less than 1 hour.Sun, 01 Dec 2013 00:00:00 GMThttps://dcsg.me/writing/symfonycon-coming/https://dcsg.me/writing/symfonycon-coming/Next week is the SymfonyCon in Warsaw, where I will be presenting a talk and helping on the hacking day.Sun, 01 Dec 2013 00:00:00 GMThttps://dcsg.me/writing/zendcon-europe-2013-amazing-experience/https://dcsg.me/writing/zendcon-europe-2013-amazing-experience/ZendCon is one of the largest PHP conferences in the world, and this year Paris hosted the first European edition — a three-day conference with tutorials and sessions.Sun, 01 Dec 2013 00:00:00 GMThttps://dcsg.me/writing/console-applications-made-easy-zendcon-europe/https://dcsg.me/writing/console-applications-made-easy-zendcon-europe/This talk was presented at ZendCon Europe 2013 — an introduction to the Symfony2 Console component and how to use it effectively.Fri, 01 Nov 2013 00:00:00 GMThttps://dcsg.me/writing/lamp-environment-ground-vagrant-puppet-zendcon-europe/https://dcsg.me/writing/lamp-environment-ground-vagrant-puppet-zendcon-europe/This tutorial was presented at ZendCon Europe 2013 — an introduction to Vagrant and Puppet for building and distributing your development environment.Fri, 01 Nov 2013 00:00:00 GMThttps://dcsg.me/writing/build-console-applications-phplx/https://dcsg.me/writing/build-console-applications-phplx/This talk was presented at the phplx October 2013 meetup — an introduction to the Symfony2 Console component for building command-line applications.Tue, 01 Oct 2013 00:00:00 GMThttps://dcsg.me/writing/fixing-the-nfsd-export-option-conflict/https://dcsg.me/writing/fixing-the-nfsd-export-option-conflict/After updating to Mac OS X Mavericks, I realized my Console app was getting lots of errors from nfsd — here's how to fix conflicting nfs exports caused by Vagrant.Tue, 01 Oct 2013 00:00:00 GMThttps://dcsg.me/writing/lxjs-2013-was-awesome/https://dcsg.me/writing/lxjs-2013-was-awesome/This year the Second edition of LXJS — a not-for-profit by-the-community international conference about the New Worlds of JavaScript — had place at Cinema São Jorge in Lisbon.Tue, 01 Oct 2013 00:00:00 GMThttps://dcsg.me/writing/speaking-at-the-first-european-symfonycon-2013-at-warsaw/https://dcsg.me/writing/speaking-at-the-first-european-symfonycon-2013-at-warsaw/In December I will be speaking at the first European edition of SymfonyCon in Warsaw, talking about How to build Console Applications.Sun, 01 Sep 2013 00:00:00 GMThttps://dcsg.me/writing/i-am-an-oracle-certified-professional-mysql-5-developer/https://dcsg.me/writing/i-am-an-oracle-certified-professional-mysql-5-developer/Yesterday I took the exam part II of the certification path for Oracle Certified Professional, MySQL 5 Developer and got a score of 84%.Thu, 01 Aug 2013 00:00:00 GMThttps://dcsg.me/writing/presenting-workshop-session-lxjs-2013/https://dcsg.me/writing/presenting-workshop-session-lxjs-2013/I'm very happy and proud to be part of the LXJS 2013 edition — this is my first time presenting a workshop at an international conference.Thu, 01 Aug 2013 00:00:00 GMThttps://dcsg.me/writing/speaking-at-zendcon-europe-2013-paris/https://dcsg.me/writing/speaking-at-zendcon-europe-2013-paris/In November I will be speaking at the first edition of ZendCon Europe in Paris about Console Applications made easy and a tutorial on building a LAMP environment with Vagrant and Puppet.Thu, 01 Aug 2013 00:00:00 GMThttps://dcsg.me/writing/git-github-vagrant-and-puppet-workshops-the-startup-scholarship/https://dcsg.me/writing/git-github-vagrant-and-puppet-workshops-the-startup-scholarship/I was invited to do a technical workshop at The Startup Scholarship — an international summer program in Lisbon — covering Git, Github, Vagrant and Puppet.Mon, 01 Jul 2013 00:00:00 GMThttps://dcsg.me/writing/time-to-move-to-a-new-challenge/https://dcsg.me/writing/time-to-move-to-a-new-challenge/Today was my last day at Sedimap Portugal — it was an awesome journey with lots of challenges and great accomplishments.Mon, 01 Jul 2013 00:00:00 GMThttps://dcsg.me/writing/boost-your-dev-environment-with-vagrant-phplx/https://dcsg.me/writing/boost-your-dev-environment-with-vagrant-phplx/This talk was presented at phplx June 2013 meetup — an introduction to Vagrant with Puppet that lets you distribute your development environment.Sat, 01 Jun 2013 00:00:00 GMThttps://dcsg.me/writing/my-opinion-about-m101p-mongodb-for-developers-course/https://dcsg.me/writing/my-opinion-about-m101p-mongodb-for-developers-course/This course from 10gen is for everyone who wants to learn about MongoDB — it covers everything from basic installation to replicated and sharding environments.Sat, 01 Jun 2013 00:00:00 GMThttps://dcsg.me/writing/introduction-to-assetic-at-phplx/https://dcsg.me/writing/introduction-to-assetic-at-phplx/My talk "Introduction to Assetic" at the 1st phplx meetup, with slides, examples on GitHub and a video.Sat, 01 Dec 2012 00:00:00 GMThttps://dcsg.me/writing/composer-plugin-for-oh-my-zsh/https://dcsg.me/writing/composer-plugin-for-oh-my-zsh/This is a very simple plugin for Oh My Zsh that adds composer autocomplete feature and useful aliases.Mon, 01 Oct 2012 00:00:00 GMThttps://dcsg.me/writing/how-to-allow-remove-master-branch-from-git/https://dcsg.me/writing/how-to-allow-remove-master-branch-from-git/Today I needed to remove the master branch from a remote repository — by default the git server denies this, but you can change the behavior.Mon, 01 Oct 2012 00:00:00 GMThttps://dcsg.me/writing/how-to-checkout-a-new-branch-from-other-branch-or-tag-with-git-checkout/https://dcsg.me/writing/how-to-checkout-a-new-branch-from-other-branch-or-tag-with-git-checkout/Today I learned a new way to checkout a new branch from other branch or a tag using a single git checkout command.Mon, 01 Oct 2012 00:00:00 GMThttps://dcsg.me/writing/how-to-configure-and-install-the-jira-git-plugin-with-gitlab/https://dcsg.me/writing/how-to-configure-and-install-the-jira-git-plugin-with-gitlab/The Jira Git Plugin is not officially supported by Atlassian, but Marcello Teodori added support for version 5 of Jira — here's how to set it up with Gitlab.Mon, 01 Oct 2012 00:00:00 GMThttps://dcsg.me/writing/lxjs-a-conference-to-be-repeated/https://dcsg.me/writing/lxjs-a-conference-to-be-repeated/Last weekend took place one of the most amazing conferences I have been — lxjs 2012, a 2-day non-profit international conference about Javascript organized by the community for the community.Mon, 01 Oct 2012 00:00:00 GMThttps://dcsg.me/writing/my-talk-about-angularjs-with-asp-net-mvc/https://dcsg.me/writing/my-talk-about-angularjs-with-asp-net-mvc/This weekend I gave my first talk at NetPonto community — an introduction to AngularJS with ASP.NET MVC 4.Wed, 01 Aug 2012 00:00:00 GMThttps://dcsg.me/writing/how-to-create-a-custom-filter-with-angularjs-v1/https://dcsg.me/writing/how-to-create-a-custom-filter-with-angularjs-v1/A few days ago I needed to create a custom filter to truncate a piece of text with a specific length and with a custom ending.Sun, 01 Apr 2012 00:00:00 GMThttps://dcsg.me/writing/the-multitasking-name-game-portuguese-version/https://dcsg.me/writing/the-multitasking-name-game-portuguese-version/This game is intended to demonstrate a simple and practical way of the problems and disadvantages of multi-tasking.Thu, 01 Mar 2012 00:00:00 GMThttps://dcsg.me/writing/my-experience-from-the-csm-training-course/https://dcsg.me/writing/my-experience-from-the-csm-training-course/Before sharing my experience, I want to share the reasons that led me to do this training course in Scrum and agile methodologies.Sun, 01 Jan 2012 00:00:00 GMT