Mitchell Hashimoto

Mitchell Hashimoto

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Co‑founder of HashiCorp, creator of Vagrant, Terraform, now building Ghostty, speaks on infrastructure automation.

AI Enhances Top Developers: Redis Array Success
SocialMay 5, 2026

AI Enhances Top Developers: Redis Array Success

Love this post by @antirez on developing Redis Array support. Its a great showcase of thoughtful AI usage and how AI can empower even the best developers while still producing high quality work. https://t.co/xc5KhcHb2P

By Mitchell Hashimoto
Local AI Models Now Suffice for Neovim Tab Completion
SocialApr 27, 2026

Local AI Models Now Suffice for Neovim Tab Completion

I'm someone who still really likes tab complete models (though I use them far less than before, sure). It struck me today that local models are probably good enough nowadays for this. Surely folks are doing this but I can't...

By Mitchell Hashimoto
Easy Vouch Boosts PR Quality Without Slowing Flow
SocialApr 25, 2026

Easy Vouch Boosts PR Quality Without Slowing Flow

A couple months in and Vouch in Ghostty is working extremely well. Our PR quality is up and the rate of PRs has not gone down at all. Getting a vouch is easy, and the minimal barrier to entry easily...

By Mitchell Hashimoto
Prioritize Happy‑path Performance, Avoid Needless Allocations
SocialApr 22, 2026

Prioritize Happy‑path Performance, Avoid Needless Allocations

Observations from writing Go again, exacerbated by agents but not unique to them. First, its far too easy to allocate and agents (probably people too) do it too often. For example, to "undo" work on error, its enticing to keep...

By Mitchell Hashimoto
Simdutf V9 Removes Libc++ Dependency for Libghostty‑vt
SocialApr 22, 2026

Simdutf V9 Removes Libc++ Dependency for Libghostty‑vt

Simdutf released v9 which includes the ability to use it without libc++ at runtime (via a cleanup of my work). Really glad I could help get this upstream, a big win for all libghostty-vt users as we eliminate a major...

By Mitchell Hashimoto
AllBirds AI Pivot Sparks Bold Market Experiment
SocialApr 15, 2026

AllBirds AI Pivot Sparks Bold Market Experiment

I’m excited about the AllBirds AI pivot because this is the first completely pure act of retardmaxxing in the public markets and I’m so on board with watching that journey play out.

By Mitchell Hashimoto
Tesla Plaid X’s FSD Surpasses Expectations, Drives Itself
SocialApr 10, 2026

Tesla Plaid X’s FSD Surpasses Expectations, Drives Itself

Traded in my 2020 Model S for a brand new plaid X before they discontinue it. Car is amazing, but the FSD hype is real. It blew away my expectations coming from the 2020 hardware. 95% of my miles are...

By Mitchell Hashimoto
Zero‑build Libghostty Xcframeworks Now Auto‑published Each Commit
SocialApr 6, 2026

Zero‑build Libghostty Xcframeworks Now Auto‑published Each Commit

We now build binary "xcframework" packages for libghostty on every commit for macOS and iOS. They're available via GitHub releases and blob storage. Just drop them into Xcode or in a Package.swift and you're ready to go. No Zig headaches....

By Mitchell Hashimoto
Make GitHub Core Agentic Infrastructure, Ditch Copilot
SocialMar 25, 2026

Make GitHub Core Agentic Infrastructure, Ditch Copilot

Here’s what I’d do if I was in charge of GitHub, in order: 1. Establish a North Star plan around being critical infrastructure for agentic code lifecycles and determine a set of ways to measure that. 2. Fire everyone who works on...

By Mitchell Hashimoto
Windows CI Now Fully Tests and Builds Libghostty‑vt
SocialMar 23, 2026

Windows CI Now Fully Tests and Builds Libghostty‑vt

Big day for Windows + libghostty-vt: - We now run the full unit tests on Windows in CI - We now build libghostty-vt in CI - We fixed a ton of issues related to MSVC with libghostty-vt - CMake now supports building libghostty-vt...

By Mitchell Hashimoto
Call for Regulation: AI Must Disclose Consent
SocialMar 16, 2026

Call for Regulation: AI Must Disclose Consent

It's so insanely disrespectful for an AI agent to talk to real people without consent or at least disclosure. This is the type of stuff I'm hugely supportive of government regulation. The FCC must expand the definition of robocalling and...

By Mitchell Hashimoto
Success Grants Me Flexible Bi‑City Family Time
SocialMar 13, 2026

Success Grants Me Flexible Bi‑City Family Time

The greatest privilege my past success has gotten me is that I can wake my daughter up at 730, eat breakfast with my family in LA, be in SF by 915, have a full day of work until 5, and...

By Mitchell Hashimoto
Separate Devices and Silence Notifications to Stay Smarter
SocialMar 11, 2026

Separate Devices and Silence Notifications to Stay Smarter

This is how you get dumber btw, true even before AI. Turn on DnD, put your phone in a drawer. The best option if you can is to separate work + personal devices so your work device can't even see...

By Mitchell Hashimoto
Codex Xhigh Cracks 6‑month Bug by Digging Into GTK4
SocialMar 5, 2026

Codex Xhigh Cracks 6‑month Bug by Digging Into GTK4

Ahhhh, Codex 5.3 (xhigh) with a vague prompt just solved a bug that I and others have been struggling to fix for over 6 months. Other reasoning levels with Codex failed, Opus 4.6 failed. Cost $4.14 and 45 minutes. Full...

By Mitchell Hashimoto