Home - Seán McNamara

Seán McNamaraSoftware engineering & other rabbit holesSearch

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Productivity10 Aug 202616 min readMy Opinionated MacBook SetupTwenty changes, written down once, so the next machine takes an hour instead of a week.

16 min read Programming7 Apr 20266 min readBuilding Chinwag: Local-First WhatsApp Chat Analysis in GoMessy conversational data made legible without any of it leaving the machine.

6 min read AI1 Apr 20263 min readWhat Are World Models in AI?A world model is a prediction of what happens next, not a picture of what is.

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10 SepRalphex Orchestrates AI Coding Agents

NotesAll notes →

10 SepAI Hero's Grill and Wayfinder SkillsMy friend Anton put me onto grill-me, and it’s turned out to be genuinely handy — I’ve used it a handful of times now to turn a…11 JunWhat's the point of Flight Mode?Ever wonder why we’re asked to switch our phones to airplane mode during a flight? You’re not alone. The Basics Flight mode is a…30 NovMarkText - An Open Source Markdown EditorAfter switching over my blog to Gatsby and using markdown, I have been on the lookout for a decent markdown editor to use for…

Things I've built

All projects →

Go · 2026Chinwag — A local-first WhatsApp chat analyzer in Go that turns exports into interactive insights about tone, topics, timing, and conversation dynamics.

Swift · 2026Steady Days — A SwiftUI iOS app for tracking habit-breaking streaks, daily check-ins, and recovery progress, with support for quitting, reducing, or pausing any habit.

TypeScript · 2026MealShelf — A clean, personal recipe book app with AI-powered import, cook mode, and public profiles, built on AWS Amplify Gen 2.