Leigh McCulloch · Software Engineer

Claude Code’s --workspace / -w flag is a nice workflow.

Not every prompt needs to be sent to a frontier model.

macOS auto-generates screenshot filenames with a timestamp, like: Screenshot 2026-04-07 at 3.57.20 pm.png That looks normal, but the space between 3.57.20 and pm isn’t a regular space.

███████╗██╗██╗ ██████╗ ██╔════╝██║██║ ██╔═══██╗ ███████╗██║██║ ██║ ██║ ╚════██║██║██║ ██║ ██║ ███████║██║███████╗╚██████╔╝ ╚══════╝╚═╝╚══════╝ ╚═════╝ Silo is a CLI tool that runs AI coding agents in isolated containers and lightweight VMs so they get full

Sometimes I need to convert a video to a GIF, usually for sharing in a GitHub issue, pull request, or README where embedding video isn’t ideal.

Sometimes I have a long video that I want to speed up.

Ever stared at a massive JSON blob, knowing the data you need is in there somewhere, but dreading the trial-and-error dance to find the right jq query?

Working on multiple branches at once can be a bottleneck.

Due to an unexpected health event I was unable to give this talk.

Rust’s cargo is opinionated as to how dependencies are resolved and selected.

Updated Fri, Jan 6, 2023: Added comments about the new sum types as interfaces proposal.

Profiling Go code is a dream.

I rarely need to profile the Go code I work on, but when I do I spend most of my time identifying code that is repeatedly pushing values to the heap, or reallocating values on the heap that could be allocated once and reused.

If you regularly program in languages like Go, Ruby, Python, JavaScript, or other scripting and fast-to-build languages you probably live in a utopia of build time.

I’ve started taking more videos in the last few years and while disk space is cheaper now than it used to be it always seems like I’m screaming towards the limits of what I have.

Dockerhost is a small tool that sets up a virtual machine hosting a Docker daemon.

I recently installed Ubuntu 21.04 on a Raspberry Pi 4.

Context Examples Confusion Visual Similarity Semantic Ambiguity Surprise Functionality Final Thoughts Context In Go, since version 1.13, error chains have been inspectable using two functions, errors.Is and errors.As.

VSCode’s Remote Container support is game changing.

Docker 1.19.x came with Contexts.

GitHub sends notifications about everything.

Distributing binaries through custom Homebrew taps is a really simple way to make binaries more accessible on Linux and macOS.

If you’re familiar with SSH configs and files there’s a known_hosts file you’ve probably seen that stores for each domain and IP address a known SSH public key.

Git lets you push to multiple remotes at once by setting multiple URLs for a remote.

This post was co-authored with Paul Gross and originally published to the Medium publication Braintree Product and Technology as Continuous Deployment Isn’t Just for Applications.

I recently looked at how I could setup my Google App Engine apps to continuously deploy.

Setting up a VPN can be time consuming, especially if you’re like me and aren’t familiar with OpenVPN.

Finding slow tests in Go is not straight forward.

Safar’s picture-in-picture feature is one of the best features of Safari, but most websites (e.g.

Installing Debian Stretch in a VirtualBox VM is pretty straight forward, but there are a few things to do to get the basic comforts of home.

Today I learned it’s remarkably easy to use Pivotal Cloud Foundry (PCF) locally using PCF Dev.

I just made githubcloneall.

*Updated Sun, Jan 8, 2023: Updated install instructions to use golangci-lint instead of gometalinter.

Cloudflare has released their new 1.1.1.1 public DNS and I wanted to give it a go.

I recently created vangen, a static website builder for Go vanity import paths.

Problem summary Problem analysis Example: Indicate a lack of value Example: Pass ownership of a value Example: A work around for lack of value Related Github Issues Experiments Problem summary In Go, pointers get used for two things: Indicate the lack of a

Need a quick script for taking screenshots of an Android device that’s connected via ADB, and your running on Windows?