Home - Seán McNamara

Latest posts

AI17 Oct 20265 min readAI's Environmental ImpactTraining a model has a huge one-off energy cost and a single prompt barely registers, but billions of prompts a day can still outweigh the training. There's a calculator to try your own usage too.

5 min read AI10 Sep 20262 min readAI Hero's Grill and Wayfinder SkillsWhen I reach for grill-me, grill-with-docs and wayfinder, three of Matt Pocock's AI Hero skills.

2 min read Productivity10 Aug 202615 min readMy Opinionated MacBook SetupEverything I change on a fresh machine, in four parts: the settings anyone benefits from, the habits to unlearn if you're coming from Windows, the next level up, and the bits that only matter if you write code.

FindsAll finds →

18 OctPi 05 SepRalphex

NotesAll notes →

11 Jun 2023What's the point of Flight Mode?Why we still switch to flight mode when we fly, and when that might change.28 Aug 2021Open source software I use for developmentFive open-source tools I use day to day for development, such as Pandoc for converting docs and ScreenToGif for quick demos.09 Aug 2020Programmer Personality: 2020Retaking the same programmer personality test 11 years on, and going from DLSB to PHTB.

Things I've built

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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.