Writing about software before we forget how it workshttps://cesar.velandia.co/https://cesar.velandia.co/assume-the-agent-read-your-env/https://cesar.velandia.co/assume-the-agent-read-your-env/Anything in your working directory or shell can end up in a coding agent's transcript, and transcripts get synced and shared. Make what the agent reads useless to anyone else.Sun, 13 Sep 2026 16:40:00 GMTsecurityAIhttps://cesar.velandia.co/write-for-the-agent-that-will-read-your-repo/https://cesar.velandia.co/write-for-the-agent-that-will-read-your-repo/An AGENTS.md file has a reader that acts on what it says. That changes what belongs in it: commands that work, the traps, what never to touch, and very little else.Sun, 21 Jun 2026 14:05:00 GMTAItoolshttps://cesar.velandia.co/keep-the-hard-parts/https://cesar.velandia.co/keep-the-hard-parts/AI makes you faster at what you already understand. The judgment you use to steer it and check its work comes from doing hard things yourself, so keep a few of them on purpose.Sat, 14 Mar 2026 15:20:00 GMTAIengineering culturehttps://cesar.velandia.co/ship-software-that-explains-its-own-failures/https://cesar.velandia.co/ship-software-that-explains-its-own-failures/When software you ship breaks on a machine you don't run, it usually goes quiet, and quiet looks the same as switched off. The software has to keep its own record and report it later.Mon, 22 Dec 2025 02:34:56 GMTDevOpshttps://cesar.velandia.co/ai-makes-tools-cheap-to-build-not-to-own/https://cesar.velandia.co/ai-makes-tools-cheap-to-build-not-to-own/AI made tools cheap to build. It didn't make them cheap to own, and owning is where the cost always was.Wed, 09 Jul 2025 01:54:00 GMTDevOpsAItoolshttps://cesar.velandia.co/why-i-switched-to-jujutsu-jj-for-ai-generated-code/https://cesar.velandia.co/why-i-switched-to-jujutsu-jj-for-ai-generated-code/Writing code isn't the slow part anymore. Keeping the repo straight and cleaning up for review is, and that's why I switched to Jujutsu (jj).Wed, 02 Jul 2025 07:18:00 GMTAItoolshttps://cesar.velandia.co/notes/ai-engineering-process-tools/https://cesar.velandia.co/notes/ai-engineering-process-tools/last update: 03/2025This catalog covers the essential known tools and platforms that AI engineers use to optimize workflows, accelerate development, and streamline ML operations. From fine-tuning optimization platforms likeMon, 05 May 2025 03:02:21 GMTnotesmachine-learningbig-datahttps://cesar.velandia.co/notes/associative-thinking/https://cesar.velandia.co/notes/associative-thinking/Associative thinking creates webs instead of laddersMon, 21 Apr 2025 09:02:00 GMTpersonal-growthnoteshttps://cesar.velandia.co/notes/aws-security-prep/https://cesar.velandia.co/notes/aws-security-prep/Infrastructure SecurityYour team needs to provide access to a Linux instance shell using AWS Systems Manager Session Manager. The instance does not have Internet access. What is the minimum configurationTue, 25 May 2021 07:54:02 GMTnoteshttps://cesar.velandia.co/notes/advice-devops/https://cesar.velandia.co/notes/advice-devops/This week I was asked a really fundamental question and I totally flunked. I didn't grasp its importance and here is my attempt to correct that mistake: What advice wouldThu, 22 Apr 2021 04:42:52 GMTDevOpsnoteshttps://cesar.velandia.co/notes/container-security/https://cesar.velandia.co/notes/container-security/ChallengesTraditional tools aren't fit to secure containers (and kubernetes): too heavy handed such, e.g., EDR, vulnerability scanners, hostbased firewalls, network forensics, security analytics.Alternative dedicated lightweight tools are beingWed, 14 Apr 2021 11:38:01 GMTnotescontainerssecurityhttps://cesar.velandia.co/notes/cloud-sec-posture/https://cesar.velandia.co/notes/cloud-sec-posture/Cloud security posture managementWhat is it?Cloud security posture management validates your configuration in cloud environments (usually public clouds), it includes but not limited to: Auditing and monitoring of cloudWed, 07 Apr 2021 07:57:57 GMTnotessecurityhttps://cesar.velandia.co/books/seeking-wisdom/https://cesar.velandia.co/books/seeking-wisdom/https://m.media-amazon.com/images/S/compressed. photo.goodreads.com/books/1330087550i/1995421.jpgfrom Darwin to MungerWisdom seeker makes an attempt to understand how the likes of naturalist Charles DarwinTue, 05 Jan 2021 07:31:12 GMTbook notesmindsethttps://cesar.velandia.co/notes/best-aws-reinvent/https://cesar.velandia.co/notes/best-aws-reinvent/2020Zero Trust: An AWS perspective – Quint Van DemanTen easy and effective ways to secure your AWS environment – Becky WeissSecurity best practices the AWS Well-Architected way – Ben Potter2019CI/CD for serverlessFri, 01 Jan 2021 09:49:00 GMTnotesAWShttps://cesar.velandia.co/notes/well-architected-framework/https://cesar.velandia.co/notes/well-architected-framework/AWS Well-Architected FrameworkDesign PrinciplesAWS...Cost OptimizationCost OptimizationPerformance EfficiencyPerformance Effi...OperationalExcellenceOperational...SecuritySecurityReliabilityReliabilityPerform OperationsAs CodePerform Operations...Annotate Documentation Annotate Documen...Make Frequent, Small Reversible ChangesMake Frequent, S...Refine Operations Procedures FrequentlyRefine OperationsThu, 24 Dec 2020 06:57:00 GMTnotesAWShttps://cesar.velandia.co/notes/cloud-native-security/https://cesar.velandia.co/notes/cloud-native-security/Intro[TK] Reports Snyk - State of Cloud Native Application SecurityCloud Native Application Security Report | SnykNew research reveals 60% of organizations have increased security concerns since adopting cloud native. ReadTue, 01 Dec 2020 06:08:00 GMTnotessecurityhttps://cesar.velandia.co/notes/daily-stoic/https://cesar.velandia.co/notes/daily-stoic/I took the daily stoic challenge this summer. It is a 10-day program developed by author Ryan Holiday that will encourage you to implement ideas from the stoics into yourTue, 29 Sep 2020 08:16:00 GMTpersonal-growthnoteshttps://cesar.velandia.co/notes/cka/https://cesar.velandia.co/notes/cka/⚠️ This information might have changed in newer versions of the certification examsIntroductionThe Linux foundation provides quite a few certifications and some of the most looked after are related to Kubernetes.Mon, 13 Jul 2020 07:32:00 GMTnotescertificationscontainershttps://cesar.velandia.co/notes/docker/https://cesar.velandia.co/notes/docker/Getting startedImages are the blueprint to instantiate containers that are built, run, and distributed by the Docker Daemon, which used via a Docker Client and pull images from a registryThu, 18 Jun 2020 02:14:19 GMTnotescontainershttps://cesar.velandia.co/notes/gitops/https://cesar.velandia.co/notes/gitops/Standarized workflow to deploy, configure, monitor, update IaaC – the repository contains declarative descriptions of the desired state of the infrastructure ... and automation makes the production enviroment match the repositoryState isMon, 15 Jun 2020 09:40:00 GMTnotesDevOps