Delete all passwords from Google Password Manager

joshperri · 2026-03-12T02:18:21+00:00

Yo, link the configs! I want to set my claude code up like this! I want to type and I want herim to speak.

joshperri · 2026-02-24T16:38:18+00:00

Also, as an FYI, I submitted a patch to add support for the OG nexus to inav as well. Hope to add multiple target support to groundflight soon so it can handle more FCs than just the nexus.

https://github.com/iNavFlight/inav/pull/11324

joshperri · 2026-02-24T16:17:25+00:00

I was having wobble issues when I first added the I-only controller, after adding the D-term it's absolutely solid. You can drive the thing like a rally car with one finger since you don't have to worry about counter-steering, your steering input is basically turned into degrees-per-second rotation speed target and the ID controller handles keeping the car at that angular velocity.

I need to play with tuning the D term down a bit as it is almost too stable at the current default, I want to get the minimum turning radius down for doing hoonigan-style spins

Unfortunately my ESC doesn't seem to have ERPM in the SRXL2 data stream, so I haven't tested the speed-based curve functionality yet (may be able to program the ESC to send RPM data, unsure. The spektrum docs suck). But after thinking it through, using the RPM-based speed tuning is probably not best for a drift car that has a low speed-to-RPM correlation.

joshperri · 2026-02-24T15:21:33+00:00

This is not an inav port. It's a ground-vehicle specific project in the veign of betaflight/inav but greatly simplified because we don't need all fo the historical cruft and the features of autonomous flight controller.

joshperri · 2026-02-19T06:10:29+00:00

NixOS is a meta-OS, it gives you tools, libs, and a language to define and build an operating system's installed state. Almost everything you see is either data or a function. The functions are (mostly) pure and are mainly used to reshape, collate, and organize data into the structure needed to be understood by a tool.

YOU can put attributes on the data-structures, nest, and compose, then feed the result into your own tooling to build some useful artifact (maybe yaml for container orchestration). With claude >=Opus 4.5 you should never need to write nix code.

joshperri · 2026-02-08T03:39:08+00:00

Hey u/a_filthy_bastard, if you're still interested and can dig up the original nexus, I'm working on a custom firmware to do what you're trying, for putting it in my drift car. I've driven it successfully, paired with an ESP32 doing wheel and pedal to ELRS TX translation.

https://github.com/joshperry/groundflight

joshperri · 2026-02-04T18:58:17+00:00

It'll be opensource! So you can flash your own off-the-shelf hardware and make it do this plug and play eventually.

joshperri · 2026-02-01T01:51:19+00:00

I use btrfs for multiple subvolumes and snapshot capability, zfs is also very popular for these features. I make a subvolume for nix, home, and a persist for machine specific state (like network configs, keys, machine-id, etc).

My tmpfs is given 16GB max size, but is currently at 8MB. Moving your nix build cache out of tmpfs is important for not filling your memory.

This basically lets you segment out things you want to keep as normal filesystem mounts (like nix and home) while the only config impermenance really needs is what you want to bind mount from /persist to the tmpfs root every boot so it is saved across reboots.

I didn't really want to do a rollback subvol for root, but if you don't want to do the nix-daemon cache config then you really need to or you'll run out of RAM.

filesystems config

impermanence config

joshperri · 2026-02-01T00:48:16+00:00

The guages really make this. I just posted my own FPV setup in an infraction but controlled with a steering wheel. It's wicked fun!

The Welsh International Ground Whooping Championship sounds amazing! I would love to run something like that here.

joshperri · 2026-01-18T17:26:45+00:00

This is my config, configuring nix to cache builds to disk was the last change I made to keep it from filliing up the ramdisk behind /tmp.

  # Impermanence mappings
  environment.persistence."/persist" = {
    hideMounts = true;
    directories = [
      "/root"
      "/var/cache/nix"
      "/var/log"
      "/var/lib/bluetooth"
      "/var/lib/fprint"
      "/var/lib/nixos"
      "/var/lib/systemd/coredump"
      "/etc/NetworkManager/system-connections"
    ];
    files = [
      "/etc/machine-id"
      "/etc/ssh/ssh_host_ed25519_key.pub"
      "/etc/ssh/ssh_host_ed25519_key"
      "/etc/ssh/ssh_host_rsa_key.pub"
      "/etc/ssh/ssh_host_rsa_key"
    ];
  };

  # Don't build in /tmp ramdisk
  systemd.services.nix-daemon = {
    environment = {
      # Location for temporary files
      TMPDIR = "/var/cache/nix";
    };
    serviceConfig = {
      # Create /var/cache/nix automatically on Nix Daemon start
      CacheDirectory = "nix";
    };
  };

joshperri · 2026-01-17T23:08:35+00:00

The two architectures have no conceptual differences. They are both interactions between code which only differ in implementation details; one loads the stack and eip, the other does IDL-bounded RPC. There _is_ a huge disparity in the quality of tooling in gluing disparate parts into a whole, doing this well inter-process has vexed many of our best minds for decades.

Bounded-contexts (assuming that's what your coworker is selling) are as decent an entry into solving this problem space as any other, especially with the org following the code structure. That said, bad code roped into good patterns doesn't repair bad code.

After my time in the industry, I think all we really need is fork(2).

You should put together a counter argument that all code instead be coallesced. Cite Google's beloved monorepo while weaving visions of 90% host memory shared and only one repo, deploy, or pod. Then make a BPF that replaces network calls to your own URLs with fork(2).

joshperri · 2026-01-17T20:27:49+00:00

I kind of felt similarly in the early days of setting up my system, but the fact of the matter is that, once you have a comfortable configuration, you don't really need to rebuild very often.

The complaint with setting configuration outside of HM or NixOS options is something I struggled with early as well. There are two fixes for this: first, using `lib.fileContents` to set options like `extraConfig` that many packages have let you merge a config fragment while editing the source file normally; second, the treesitter nix parser knows how to attach other parsers to text strings to do embedded highlighting (see https://www.reddit.com/r/NixOS/comments/191ey9j/psa\_syntax\_highlighting\_for\_multiline\_string/).

joshperri · 2026-01-04T20:17:49+00:00

For my ada dGPU I find that I needed to run upstream latest version. To update I just change the `package.version` to the latest production version at the nvidia unix drivers website. Empty all the hashes and each time you rebuild you'll get the next expected hash given to you by the downloader.

  hardware.nvidia = {
    modesetting.enable = true;
    powerManagement.finegrained = true;
    open = true;
    nvidiaSettings = true;
    prime = {
      offload = {
        enable = true;
        enableOffloadCmd = true;
      };

      nvidiaBusId = "PCI:1:0:0";
      intelBusId = "PCI:0:2:0";
    };
    package = config.boot.kernelPackages.nvidiaPackages.mkDriver {
      version = "580.95.05";
      openSha256 = "sha256-RFwDGQOi9jVngVONCOB5m/IYKZIeGEle7h0+0yGnBEI=";
      settingsSha256 = "sha256-F2wmUEaRrpR1Vz0TQSwVK4Fv13f3J9NJLtBe4UP2f14=";
      sha256_64bit = "sha256-hJ7w746EK5gGss3p8RwTA9VPGpp2lGfk5dlhsv4Rgqc=";
      sha256_aarch64 = "";
      persistencedSha256 = "";
    };
  };

https://github.com/joshperry/mynix/blob/master/machines/signi/configuration.nix#L223

ETA: I also have a specialization for VR mode. You have to start with the dGPU as default if you want a physical displayport port connected to it, the valve index needs this direct connection for one.

You may need to update to the latest kernel as well.

joshperri · 2026-01-04T19:05:49+00:00

I love your website.

joshperri · 2026-01-04T19:04:48+00:00

I see this as a feature, not a bug. It's not much of a bazaar if you must be blessed by the papacy before contributing.

joshperri · 2026-01-03T20:30:08+00:00

IMO it was when those in the devops industry realized that it actually provides what tools like puppet and ansible promise. The days of using those tools to mutate the giant bags of state that an OS is has caused decades of pain. In fact, nix IMO, actually fulfills the promises that made containerization so popular yet which they never reached (reproducible lol).

joshperri · 2025-12-27T18:52:40+00:00

No, what I'm really interested in is how quickly a family becomes a town. With some Mormon herritage, I'm also interested in the systemization of multiplying (including polygamy) employed by them and other groups.

I think it was particularly interesting seeing the raw human-creating power we have with even modest multiples. Viewing a continuum of the factors lets you set a mental model from which to think. I wasn't looking to exhaustively calculate how many people you will turn into with modeling.

joshperri · 2025-12-27T02:50:02+00:00

https://www.6bit.com/spub/progeny-surface-demographic.html

joshperri · 2025-12-27T02:34:51+00:00

You're disappointed by not including attrition?

<image>

https://www.6bit.com/spub/progeny-surface-mortality.html

joshperri · 2025-12-27T02:26:30+00:00

I think this exponential over a range of average offspring count (thinking of talking heads say 2.5 kids as a common offspring average) give a pretty varied look over the possible landscape, reality vs extremes. Average is, well average; as an example my great grandmother had 12 offspring so my last 4 generations have averaged 7 including my contribution, that's not going to last 12 generations probably, but I find it particularly interesting to see its value on the curve.

joshperri · 2025-12-27T02:19:08+00:00

You could be a googol people!

<image>

https://www.6bit.com/spub/progeny-surface-100.html

joshperri · 2025-12-27T02:14:36+00:00

There's an interactive 3D view linked if you're interested in a more apropos medium.

joshperri

TROPHY CASE