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Mitchell Hashimoto

@mitchellh233k followers

Co-founder of @Superlogical. Creator of Ghostty. 👻 Prev founded @HashiCorp, created Vagrant, Terraform, Vault, and others.

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1Mar 23, '23I've developed a lot of plugin systems, and the OpenAI ChatGPT plugin interface might be the damn craziest and most impressive approach I've ever seen in computing in my entire lif49.6×1.6M5.7k6792.1k
2Dec 26, '24👻35.7×1.2M8.6k1.3k2k
4Oct 26, '25I was someone who through my 20s wasn't even sure if I wanted kids. Work was my passion and I enjoyed it deeply. I filled up two passports. I did well financially. And yet, it's in30.1×984k2.9k129612
6Jan 18, '23You may not like it, but this is what peak programming looks like. It is immediately readable and obvious what it does. There’s no way this is a hot path function so optimizing for26.2×854k3.5k275240
7Oct 10, '24I can understand engineers who use Linux. I can understand engineers who use macOS. I really don’t understand engineers who use Windows (except windows app developers). By understa25.1×820k5k198719
8Apr 14, '24I actually did crack my screen once but it was on purpose. Many years ago, my iPhone stopped charging. I took it to the Apple Store, they said they could repair it for free but I w24.1×787k4.1k163318
9Feb 14, '24Just had an amazing random interaction with a new founder explaining his startup to me. Him: "Do you know Terraform?" Me: "I do!" Him: <explains TF concepts> Me: "I've got it yeah,19.6×641k2.6k72315
10Oct 6, '25This is funny but I'm also so sorry to trigger this during a talk. This is making me wonder if I can reliably detect when the display is being mirrored and delay update notices... 17.3×564k5.4k68468
11Oct 11, '25I've shared the full transcript of every agentic coding session from implementing the unobtrusive Ghostty updates and provided commentary alongside about my thinking and process. T14.9×488k2.2k1922.5k
12May 26, '23I like to build and use my own tools, but I went a little far on this one... For the past few years, I've been casually off and on building my own terminal emulator. And for the pa14.8×485k3.2k196714
13Dec 14, '23After more than 11 years, I've decided to move on from HashiCorp. HashiCorp achieved more than my wildest dreams and I'm proud of the role I played. While this has been long planne13.8×452k3.5k327317
14Dec 28, '24Ghostty on Reddit, there's a lesson in this. 🤣 "r/macOS": Neat, nice app. iTerm is nice too. I love choice. "r/linux": arguments about what "native" means, angry they have to clic13.7×448k3.8k107563
15Feb 5, '25I've been trying to find the person(s) responsible for macOS terminal for years. I know culturally it's not their vibe, but I'd be more than happy to make libghostty a great base f13.6×445k3.8k153588
16Nov 8, '23Fucking Yikes. This branding is... unfortunate. Don't get me wrong, Copilot is great, but there's still so much room for improvement on the "Social Coding" platform (remember when 13.4×439k1.4k114177
17Oct 26, '25Some early HC employees will probably remember me joking that it was my divine mission to eliminate YAML from the world. I joked I started HC only to kill YAML. Like, back in 2013.13.3×436k2.6k89324
18Nov 23, '2310x engineers blah blah blah who cares. The engineers that impress me the most are the ones that fearlessly dive into code, domains they know absolutely nothing about and end up pr13.1×428k3.3k319419
19Oct 1, '24Proud to share that my wife and I have pledged $300,000 to the Zig Software Foundation. Zig has been an absolute joy to use but more importantly I think their culture, vision, and 11.6×380k3k222208
20May 4, '24First I optimized CPU, then memory, now I'm onto the renderers (Metal first). Scrolling Neovim now sustains ~175fps easily (vsync off of course). More room for improvement, but thi11.5×374k1.9k93525
21Jun 19, '25I write a lot of Swift and ship a decently complicated macOS application so I think I'm allowed to have an opinion on this. But, how can anyone like Swift? Seriously it's such a ci10.6×346k2.1k66512
22Sep 16, '25This is going to be ironic coming from me but the best software engineers I've ever worked with and that you can ever hire are the ones with no online presence, no GitHub activity,10.6×345k5.6k219894
23Jun 25, '25I'm here and ready to share any and all opinions or experiences I had with Microsoft, Google, and Amazon now. It's been more than long enough and they can't hurt me anymore. Curiou9.6×313k1.6k57940
24Jun 29, '23I'm convinced everyone who actually likes JS/TS and the whole ecosystem is just suffering from Stockholm syndrome paired with being forced to use it. We're all just stuck with this9.6×312k2.1k236141
25May 31, '25macOS's tty impl (in the kernel) has a 1024 byte internal buffer limit for cooked mode. After that, writes succeed but the data is silently dropped. iTerm2 works around this by sle8.8×286k3.2k145577
26Oct 16, '25The chest pumping of the current new wave of SV founders puts a bad taste in my mouth. Just saw a pic of a funded teenage founder showing off his intl business class seat. I still 8.7×285k2.7k48328
27Sep 15, '25Ghostty 1.2 is now out! macOS Tahoe support, command palette, graphical progress bars, custom cursor shaders, background images, quick terminal on Linux, global keybinds on Linux, 8.4×275k1.8k159202
28Dec 11, '2499% of users of software want to launch it and get to work. A month ago I asked Ghostty beta users to share their configs and challenged myself to understand why they're not empty.8.1×264k1.4k39152
29Sep 20, '25Look, say what you will about it, but right click editing a PHP file in an FTP client with upload-on-save is still the tightest and fastest feedback loop I've ever had in my life. 7.8×254k2.7k141299
30Oct 11, '25Some reactions to my post are "wow, I'll never use Ghostty since you use AI." That's fine, I really don't care. But my friends, if you plan on avoiding all software that had any AI7.3×237k2.7k102159
31Aug 19, '25Going forward, AI assistance must be disclosed for Ghostty contributions:7.2×237k2.2k131214
32Jun 13, '25The Liquid Glass effects are not expensive and anyone claiming they are has no idea how modern GPUs and animation work. Anyone saying it is is either just parroting or is an idiot.7.2×236k2.1k65207
33Aug 29, '25GitHub feels like a product that isn't used by the people that work there. That can't POSSIBLY be true, I know. I just hit issues everyday that really make me wonder... how can thi6.4×209k1.7k49181
34Jul 1, '25I had lunch with @dhh yesterday and he made very compelling arguments for Samsung phones and Beelink PCs. I did my best to Nix pill him lol. In any case I think we’re both excited 6.3×206k1.6k23161
36Dec 23, '24100%. Ready to go. The release will probably be on the 26th though so I can take time to enjoy the holidays with my family without stressing about inevitable launch day issues. For6.1×199k3.7k244234
37Sep 29, '25In over 15 years of open source, I can't remember ever saying "your example doesn't compile" (I probably did, but it's so rare I can't remember). Now, I literally say this everyday6.0×196k3.8k152207
38Aug 18, '25Average bug report as a Linux desktop app dev: "ghostty doesn't work when skibidi-ng signals systemd-gears on wayland 42.1.2-2006-04-21 with a swahili keyboard layout using keyd, a6.0×195k3.3k105239
39Apr 15, '24Cloud pricing applied to literally anything else, i.e. the coffee shop: coffee is $5, but if you stay it’s free and we charge $0.06/minute unless you’re using internet then it’s $05.9×194k1.4k157225
40Nov 7, '25I'm beginning to close PRs for unsolicited changes I don't want to maintain with: "Thanks, I'm not interested in the transfer of maintenance for this to us, but I'm happy to see yo5.9×193k1.3k19112
41Jun 21, '25Ghostty's icon is now Tahoe compatible: supports Liquid Glass, light/dark mode, and tinting. We had to lose a tiny amount of detail but very hard to notice, and the new effects mak5.7×185k1.2k28130
42Aug 26, '25Bro GitHub discussions is not an LLM input box. lol.5.6×184k3.5k72121
43Jul 22, '21I've decided to become a full-time individual contributor at HashiCorp and will no longer be an exec. This is something we've planned for years and I'm so happy HashiCorp is in a p5.6×06.2k607149
44Jul 7, '25Apple froze the Ghostty Apple ID today, probably because they felt threatened by the incredible speed with which we're making the built-in Terminal look like a toy. I'm working on 5.6×183k1.5k27155
45Sep 1, '25Ghostty on macOS now also has native GUI for showing progress bars reported by OSC 9;4. This is, as far as I know, the first macOS terminal to support this (will be part of Ghostty5.5×180k1.7k65200
46Jun 1, '23Sharing how I approach large software projects, how I break down tasks and decide what order to work on things, and how I stay motivated throughout. This a personal thing, since di5.4×175k1.2k187814
47Oct 5, '23I see people complain about Git and I can't help but remember my first programming job had a full time person whose only job was to merge Subversion branches and resolve conflicts 5.4×175k1.3k8238
48Apr 10, '25> Apple's AI/ML group has been dubbed "AIMLess" internally > One of Walker's pet projects was removing the "hey" from the "hey ‌Siri‌" ... which took over two years to achieve. Lma5.4×175k1.8k45268
49Feb 13, '24I talk to a disappointingly large amount of people that cannot comprehend that I can work on something for the joy of it and not any long term financial play.5.3×173k1.6k82110
50Jun 18, '21How do we notify the HBO person their integration test passed?5.1×06.4k52244
51Sep 25, '25Up by 530 AM. Mostly empty streets and coffee at 6 AM. Short walk on the beach until 630. Laptop open and committing by 645 AM. I love my mornings.5.0×163k2.1k19221
52May 30, '25An example of a non-advertised, extremely nice version of a mundane thing I only recently learned about: moving managers. My family recently had to move out of our house into a ren5.0×163k1.3k44637
53Oct 30, '25This is what GitHub PR review should feel like. And probably what it should look like too, the amount of whitespace and padding and fluff for fluffs sake gets in the way of what ne4.6×152k2.1k51271
54Nov 13, '24Work in progress, but too excited not to share. The upcoming Ghostty website homepage. Colors are not final. The vibe is final though.4.6×150k3.1k91347
55Oct 8, '25Still a lot of polish to go, but soon update popups will never show up in your demos again @romainhuet or anyone else. 😎4.6×149k1.7k2569
56Oct 19, '25Don’t be an asshole to people who work for you. That stuff spreads. Just had a garage door vendor tell me about how he worked for a founder/CEO in another state and told me the cra4.4×143k1.3k28140
57Oct 30, '25Ghostty on macOS now copies multiple formats into the clipboard. If you paste into rich text apps now, it'll preserve formatting! If you paste plain text, that'll work too. I think4.3×140k2.4k62292
58Sep 9, '25One of the best things npm could do is reject all dependencies that have less than 1,000 lines of code. The brainrot of not copy and pasting and self maintaining these trivial libr4.1×135k1.3k74144
59May 28, '25Okay stupid story time cause it’s been long enough and I feel like airing dirty laundry today. One thing I found incredibly frustrating as an employer is you can’t share your side 4.0×130k1.5k40222
60Mar 4, '25I'm here to once again remind people that for every topic on HN I've ever been truly an expert of or have had access to inside information: the HN commentary is impressively, yet v3.8×123k1.4k56156
61Aug 26, '25Ghostty 1.2 (coming in Sept) is absolutely rock solid and extremely polished. I can't wait to get this into everyone's hands soon. Sorry, search and scrollbars are deferred to 1.3,3.6×117k1.9k58118
62Oct 3, '25Zig's focus on compilation speed is paying off. Ghostty just finished upgrading to Zig 0.15, and here are some results. Build Script Compilation: 7s to 1s Full Uncached Build: 41s 3.6×116k1.6k4996
63Jun 18, '25The non-native mind can't comprehend this level of platform integration. Ghostty is the only terminal on macOS other than the built-in one that provides any Shortcuts. Also, remind3.6×116k1.5k63496
64Jul 3, '25This is required material for any software engineer to understand CPU performance optimization. Yes, it's about Instruments, but the patterns and lessons here are invaluable in gen3.4×110k1.4k1341.8k
65Oct 16, '25Ghostty now has scrollbars for macOS drawn using native macOS GUI widgets of course! Available now in tip releases. GTK will follow very shortly. 50% of Ghostty memes now dead.3.3×109k1.6k35117
66Sep 5, '23I’m a dad! Very happy to report a little baby girl entered our lives last night, happy and healthy. 🥰3.3×108k2.4k173
67Aug 19, '25I'm noticing a rapid growth in "weird" PRs. PRs that fix a problem in the most non-obvious way (when there ARE obvious ways to do it). I suspect it's LLM written but non-disclosed.3.3×107k1.8k94142
68Jul 30, '25Be wary of people who spew AI hype and screenshot their army of agents but don't seem to be shipping anything but demos. I'm a big fan of AI assistance and use agents and chat ever3.3×107k1.8k129131
70Apr 21, '25Command palette coming to Ghostty, implemented with native UI of course. macOS initially but GTK will follow and be part of the same tagged release, since there's already a mostly 3.2×103k1.3k48143
71Dec 9, '2110 years ago vs today with my best friend @armon who I am lucky enough to call my cofounder. ❤️ $HCP3.2×04.1k19957
73Oct 22, '24New blog post: Ghostty 1.0 is Coming [in December]. I restate the broader goals of the project and the specific goals for the 1.0. I have ambitious plans, but also set clear expect3.0×99k1.7k196196
74Jul 2, '25Ghostty's sprite renderer got a major refactor by our font maintainer (Qwerasd). We now support more sprites and they line up perfectly on cell edges. Additionally, our sprites now2.9×94k1.3k57174
75Apr 16, '25Heyyyyyyy Ghostty for all the terminal demos let’s go. 🤩❤️2.8×93k1.3k1578
76Dec 31, '24Ghostty 1.0.1 is out to address the most common issues people ran into with the initial release. An incredible amount of improvements mostly from contributors over the past 96 hour2.8×92k1.4k80139
77Nov 11, '21Oh my god. I've been "debugging" why this file says "modified 2 years ago" on GitHub when it the last commit was Mar. 2020 thinking it was some Git metadata issue and I realized th2.8×03.6k23634
78Dec 27, '24Thanks @antirez. I'm going to share this whenever anyone scoffs at me and says "`cat` performance doesn't matter". This stuff matters, it has real productivity implications. I smil2.7×89k1.6k73285
79Sep 15, '25Ghostty 1.2 is coming out later today. If long, detailed release notes are your jam, grab a coffee and get ready to cozy up. Releasing in an hour or two.2.5×83k1.4k3455
80Oct 22, '25I literally only just found out AWS had a major outage. I haven’t even been offline I’ve just been focused on my own desktop work. I’ll consider this a personal success at how non 2.5×81k1.4k1440
81Feb 11, '25A bunch of alternate icon choices are coming in Ghostty 1.1.1. 😍 You already have the ability to customize the colors of the default Ghostty icon, but these artist-drawn variants 2.3×76k1.7k49142
82Dec 5, '24Ghostty doesn't have a CLA so I had to reach out to ~200 contributors to get permission to relicense for the public release. Happy to say I've received confirmation from 100% of co2.3×75k1.2k3947
84Dec 5, '24How it started (2022) vs. How its going (2024). Screenshot from the Ghostty community.2.2×70k1.2k31148
85Dec 9, '24New Ghostty icon by @flarup! Retains the spirit of the original while adding a more distinctive look with differing level of detail based on icon size (i.e. the large form attached2.0×64k1.2k4278
86Sep 29, '18Spotted in a job listing. Vault is 3 years old, Terraform is 4, Packer is 5. This is going to be a tough position to fill.1.9×01.7k5129
87May 13, '21Armon and I founded a company valued in the multiple billions that employs over 1,300 people that all work from home. Me, my co-founder, our CEO are all in diff states. So this is 1.8×02k32529
88Nov 15, '22Its been like a decade but I still wake up some days (like today) and look around at the web we've built and can't believe we effectively lost RSS. To check if my fav tech writers 1.8×02k15874
89Nov 1, '18HashiCorp has raised $100 million at a $1.9 billion valuation. Extremely excited for the next few years for us and proud of the team that got us here. 🦄1.3×01.4k2362
90Jan 21, '2111 years ago today I pushed the first commit for Vagrant. I didn’t know what a virtual machine was, I barely knew Ruby, I had never done any ops, I was still a 20 year old universi1.3×01.5k19136
92Jul 14, '20Exciting news: I’ve been working with a small team on a completely new HashiCorp OSS project. Our first new OSS project in 5 years and I think its going to be pretty great. Stay tu1.2×01.5k13210
93Jan 18, '18It has been 8 years (on Sunday) since I pushed the first commit to Vagrant. Vagrant has grown to something more than I ever could’ve imagined sitting in my college dorm room on tha1.2×01.3k2350
94Dec 17, '18Take an hour lunch everyday. Especially remote working its easy to forget lunch (no social cues to go to lunch). Take a full hour. Its not just about eating, its about taking a bre1.2×01.1k21912
95Jan 21, '20Vagrant is 10 years old today! 🎉 🥰 I never imagined the success Vagrant would have or lead to for myself and so many others. Really proud of the project and everything that has c1.1×01.3k2097
96Apr 22, '19Periodically I and can’t help but be amazed that Siri was announced in 2010, and almost a decade later its still effectively valueless in day to day life for anything more than set1.0×01.2k1314
97Jun 22, '21Love that our employees can do this whenever they want. And we can trust this person will get their work done regardless. 🥰0.9×01.2k7413
98May 6, '19We passed 500 employees at HashiCorp today. 🥳 😲 We’ve hired more people in 2019 so far (May!) than we had in the entire company Jan 1, 2018. Want to thank everyone joining. Its o0.9×01.2k648
99Oct 29, '20I passed! I’m a licensed private pilot. A year since my first discovery flight, a plane switch due to COVID, 5 instructors, so many hundreds of hours of study. I’m so happy! 🥰0.9×01.3k68

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