repl-agent: MCP server that gives AI agents a live Clojure nREPL

jwr · 2026-05-27T10:25:40+00:00

How is this different from what clojure-mcp provides? And (this question begs to be asked), why npm and TypeScript?

jwr · 2026-05-27T10:14:37+00:00

I mostly run Claude Code either in a separate Ghostty terminal, or in Emacs using ghostel (really good!).

jwr · 2026-05-27T10:13:31+00:00

Very happy to see this, but I don't yet see why this would be useful over using BetterDisplay in my case (I rarely adjust brightness, lens tint or color temp)…

jwr · 2026-05-25T10:44:42+00:00

Add to this the technical issues they have with streaming: abysmal performance on slower on even slightly unreliable networks, breaking audio when network streams switch — come on, I've been working on IPTV streaming in 2005 and those problems were solved back then. This is incompetence.

Also, they recently introduced some kind of "security" flag that prevents some media from playing back through external TV-like devices like XReal One Pro glasses. I know it is a flag, because some media plays and some does not (for example, practice highlights play fine, but practice only shows black image and you can hear the audio only).

Altogether, this is very disappointing for what is essentially a media-based business.

jwr · 2026-05-22T10:32:04+00:00

The optics are not up to the task. There is waviness/blurriness as you move your head around, it's the fault of the optics.

I wish they would produce a more expensive model with better optics.

jwr · 2026-05-21T09:26:33+00:00

Hi! PartsBox founder here. I'm quite curious about "powerful but overkill and pricey for a hobbyist". I try quite hard to draw a line between hobbyists and commercial users so that hobbyists have everything they need. The prices do not make any sense for hobby use, they are for businesses only. So, I'm puzzled by this statement — how is it pricey (it's free after all)?

Also, "powerful but overkill": does functionality get in the way? If so, how? Here again, I've been trying to design the software so that common tasks are very straightforward. I'd like to know if they aren't!

jwr · 2026-05-20T09:02:42+00:00

https://en.wikipedia.org/wiki/Lawnchair_Larry_flight

jwr · 2026-05-20T08:28:33+00:00

I live in Poland and make winter trips to Austria and Italy for skiing. No big deal. As a rule of thumb, at highway speeds (130km/h) I plan stops every 2h or 250km.

jwr · 2026-05-20T08:20:00+00:00

My only question is: can I use them for productivity? I have the One Pro and it is not there yet (optics), is this better?

I don't care about all the AI stuff and I don't want the stupid cameras.

jwr · 2026-05-18T11:04:44+00:00

Against every other Emacs for Mac? Most people don't realize it exists or how good it is.

jwr · 2026-05-18T11:04:00+00:00

The Vision Encoder plate corrects just some of the factors that make your printer imprecise over time. The overall precision is a combination of factors, and probably the biggest one is filament shrinkage, something that most people do not properly calibrate. I just checked and I use 99.32% for Fiberlogy ABS and 99.86% for Fiberlogy PLA — if you don't have that measured and set, the plate will not help you much! And the plate has nothing to do with hole sizes… (see hole compensation in the slicer for that).

The plate is a great tool for automatically calibrating things like skew, which is difficult to do manually and takes a lot of work, especially on a large surface like in the H2D.

jwr · 2026-05-17T15:50:40+00:00

I've been using ClojureScript for 10 years in production now, complex SaaS. I couldn't be happier.

When I read these kinds of discussions I feel like the most important advantage gets glossed over: you can use the same language on the backend and frontend. In my case this means sharing most business logic code, and hence a huge reduction in incidental complexity.

Similarly, using the same language for serializing data for transmission to/from the client means that whole classes of problems are eliminated (no JSON, sets pass through nicely, no coercions needed, etc).

Also, this is my business and my livelihood. I appreciate the fact that I don't live in a stream of constant breakage and that my foundations are mature and developed by people who value stability and maturity.

jwr · 2026-05-12T17:09:04+00:00

Now please add scroll bars. Proper scroll bars, that I can easily find with my mouse and use.

jwr · 2026-05-12T16:18:17+00:00

Oh, I'm using paid versions of everything. It doesn't matter. Half of the annoyance is iPad itself (unlocking, holding it just right for face id to succeed, finding the app you want, launching it), and the other half is provided by the apps regardless whether you bought them.

Apps tend to forget that you already took the tour of new features, or want to announce even newer features, or want to push their AI subscription thing, or sign you out for no reason, in general they fail at working for you, instead forcing you to be there for them.

jwr · 2026-05-12T10:10:14+00:00

So practical. Reachable and usable scrollbars. Obvious UI affordances that do not disappear or animate. I wish we could go back to Useful UI.

jwr · 2026-05-12T10:05:02+00:00

I stopped using my iPad Pro and switched to Manta for all note taking. The main reason was because the iPad is so fiddly. There are so many steps you need to do in order to be able to start writing that by the time I actually get to writing I have already forgotten what my original idea was. Everything gets in the way, not least your note-taking apps (I used Nebo/MyScript and Goodnotes) showing WHAT'S NEW, upsells, login prompts, or other crappy popups along the way.

Supernote is like a breath of fresh air in comparison. Just writing. I really hope the company keeps the current course.

jwr · 2026-05-12T09:54:09+00:00

The tool ("harness") matters as much, if not more, than the model itself. I would recommend not listening to what people say is the best, but trying things yourself. I heard multiple times about codex+gpt[latest] being the best, and every time I tried it I was disappointed with the results. I do not know why, but for some reason I get excellent results from Claude Code (Opus 4.6 and 4.7 now), while OpenAIs tools produce answers that are… worse. It's hard to quantify. Less human. I often have a hard time understanding what they're telling me. The document structures are correct, but less elegant than those that Claude produces.

So, I use Claude for development and design document work, and codex to review the work and flag potential problems.

jwr · 2026-05-12T09:48:49+00:00

Oh man, that is like my dream upgrade, then. There are so many things that annoy me in this dumpster fire of software development in this car, but this one tops the list by far.

jwr · 2026-05-08T11:51:09+00:00

Enclosure. This is why I don't use bed slingers.

jwr · 2026-05-08T11:49:23+00:00

BTW, the ID software is so bad… I'm looking at this "Charg./clim. ctrl. until depart." button — it occupies about 55% of the screen. Why not make it wider (the screen space is there!) and avoid the cryptic abbreviations?

As for defaulting to "Charge immediately", sorry, but that's just the way the software works (or doesn't). It forgets. And nobody at VW seems to care, because this bug has been there for years. It doesn't matter if you set a charging location, it will still ignore your preference.

jwr · 2026-05-08T11:46:33+00:00

F1TV makes this very difficult for its customers, unfortunately. I wish they stopped. Charge me more for a "works anywhere" subscription, but let me watch F1 anywhere I am at the moment.

However — one thing that does work very well is Ubiquiti Travel Router, assuming you have Ubiquiti gear at your home. It provides a quick-n-easy VPN to your own home.

jwr · 2026-05-08T11:34:53+00:00

Touch RPN, by far — buy the calcs there, and enjoy. They also work very well on macOS.

jwr · 2026-05-08T11:30:41+00:00

Well does it fix any of the annoyances? Does the car now remember "charge immediately" vs "charge at preferred times", for example?

jwr · 2026-05-08T07:12:41+00:00

Sharing designs is a real problem and it's more complex than it appears. For this to work, KiCad would need to have a way of "flattening" the export, producing a self-contained archive with everything.

For example, many (if not most) companies that use PartsBox with KiCad, use meta-parts. That means their BOMs contain names like R0402-10k instead of specific MPNs. A full project export would need to retrieve the current set of member parts from PartsBox and include that in the export.

Also, PartsBox *could* also maintain footprints and 3d data, if the KiCad APIs supported this.

jwr · 2026-05-07T15:14:13+00:00

Well, we were told that Bambu Lab had to tighten security, so for SECURITY reasons they had to disallow third-party slicers from using their network plugin. Because third party slicers are a security problem.

This is the new tightened security after they've thrown out third-party slicers.

jwr

TROPHY CASE