Comic-style illustration of Cody Williamson

Cody Williamson senior software engineer

Senior engineer.
Serial side-project starter.

I'm a senior software engineer at OneStream Software, building automated systems in Azure. On the side I build small tools like diffle.dev and Tab Grouper, then write up how they went.

See the projects Read the writing

scout's perch. poke it, it has moods.

And whatever you do, whether in word or deed, do it all in the name of the Lord Jesus, giving thanks to God the Father through him.

Colossians 3:17

Projects

all projects
diffle.dev home page in dark mode: the headline Review the diff. Redline it. Hand it back to your agent. beside a diff of src/utils/git.ts with an unresolved inline comment

diffle diffle.dev

live

Review the diff. Redline it. Hand it back to your agent.

A local git diff viewer for focused code review.

  • TypeScript
  • Bun
  • Svelte
  • Vite
  • Tailwind CSS
  • MCP
diffle.dev
tabgrouper.com home page: the headline Group your tabs by domain. beside a live demo of tabs grouped under github.com, youtube.com, docs.google.com, figma.com and stackoverflow.com

Tab Grouper tabgrouper.com

live

Calm, organized tabs for Chrome and Edge.

A browser extension that groups your tabs by domain or subdomain on a schedule and leaves the groups you arranged by hand alone.

  • JavaScript
  • Edge Extensions API
  • Chrome APIs
  • HTML/CSS
tabgrouper.com
Rhombus scout, technical drawing The site mascot drawn as an 11 by 9 pixel diamond: off-white body, one cyan eye and an orange three-pixel aft vent, with dimension lines, labeled callouts and a title block. 11 px 9 px X · body #F8F8F2 E · eye #8BE9FD M · aft vent #FFB86C RHOMBUS-SCOUT RENDER4px/px SRCsprites.ts

Mascot engine codywilliamson.com

live on this page

A hand-built physics engine and brain for the scout that lives on this site.

Gravity, squash and stretch, and perch-to-perch leaps between real elements on the page, plus a face that reacts to what's on the page, grab-and-fling, and a "wanna fight?" mini game.

sprite
rhombus-scout, 11 × 9 px
render
svg rects, 4px per pixel (3px under 640)
body
#F8F8F2
eye
#8BE9FD
aft vent
#FFB86C
moods
neutral · happy · surprised · sleepy
glyphs
Z · ! · ? · @ · heart
src
sprites.ts
  • TypeScript
  • Vue
  • Astro
  • Vitest
  • Jev
  • Cloudflare Workers

Latest writing

all writing

AI & agents 7 min read

Porthole: A Phone Window Into My Claude Code Sessions

I run multiple Claude Code sessions across tmux windows and wanted to read them — and reply to them — from my phone. So I had Claude Fable 5 build the tool, orchestrating a fleet of Sonnet and Opus sub-agents, while friends watched the commits land in real time.

  1. AI & agents 14 min read

    Revisiting Autonomous Development with Opus 4.8

    I handed Claude Opus 4.8 a build spec and got back a working, tested, published tool in one session. Here's the framework that made a long autonomous run reliable instead of reckless.

  2. Career & life 5 min read

    Satisfaction is Futile

    A thought piece on losing satisfaction in the craft as AI changes how I work.

  3. AI & agents 14 min read

    Autonomous VPS Monitoring with Claude Agent SDK

    An AI agent that runs twice daily, performs VPS health checks, applies updates, improves its own tooling, and reports to Discord.

Client sites

see all client work
JWA Companies website displayed across multiple devices

JWA Companies jwacompanies.com

Corporate website built on WordPress using a custom starter theme featuring the Vite build system, ACF blocks, robust TypeScript support, TailwindCSS, and modern development tooling for a streamlined developer experience.

  • WordPress
  • Vite
  • ACF Blocks
  • TypeScript
  • Tailwind CSS
with Mindvolt
Holter Pickguards website showcasing custom acoustic guitar pickguards

Holter Pickguards holterpickguards.com

Custom e-commerce platform showcasing precision-crafted acoustic guitar pickguards. Built with a focus on clean design and exceptional UX that mirrors the craftsmanship of the products. Features seamless WooCommerce integration, optimized product galleries, and a streamlined checkout experience for musicians worldwide.

  • WordPress
  • WooCommerce
  • PHP
  • JavaScript
  • Responsive Design
  • E-Commerce
BPI Media Group home page with the headline We simplify your business from start to finish. over a photo of a print shop worker

BPI Media Group bpimediagroup.com

Website for an Alabama print and business services company covering printing, contract packaging, specialty products and fulfillment resources. Built as a custom WordPress theme with ACF blocks, bundled with Vite, TypeScript and Tailwind CSS.

  • WordPress
  • ACF Blocks
  • Vite
  • TypeScript
  • Tailwind CSS
with Mindvolt