chore(deps): lock file maintenance flake inputs

Persist the state of the Psion Workabout MX reverse-engineering / barcode-inventory project so it can be resumed in a future session after a reboot.

Adds `home/claude/memory/sibo_workabout_mx_scanner.md` (project memory) and indexes it in `MEMORY.md`. Records: the repo/branch and committed docs, the confirmed scanner behaviour, the key finding that the scanner is an OO library object driven via p_getlibh/p_newsend/p_send, the blocker (on-device ordinal capture), the RE toolchain, and where the continuation procedure lives.

Takes effect after a home-manager rebuild.

Reviewed-on: #60

.gitea/workflows/ci.yaml

@@ -54,7 +54,7 @@ jobs:
 
       - name: Install Nix
         if: steps.detect.outputs.run == 'true'
-        uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31
+        uses: cachix/install-nix-action@a49548c11d9846ad46ecc0115273879b045f001c # v31
         with:
           extra_nix_config: |
             experimental-features = nix-command flakes

CLAUDE.md

@@ -0,0 +1,63 @@
+# Working on this flake
+
+Project notes for changes to this repository. Persona and memory rules live in
+the user-global config; this file is about the flake's checks and conventions.
+
+## Before you commit: run the formatter
+
+Formatting and linting are driven by the flake. CI (`.gitea/workflows/ci.yaml`)
+runs `nix flake check`, which fails the build if any file is unformatted or trips
+a lint. From the repo root:
+
+- `nix fmt` — format the whole tree (writes changes).
+- `nix flake check` — run every check read-only (what CI runs).
+- `nix develop` — dev shell; its `shellHook` installs the git pre-commit hooks so
+  the same gates run on `git commit`.
+
+Never commit with `--no-verify`. A bypassed commit ships unformatted content and
+turns CI red on the next push to `main` (see "Docs are checked too").
+
+## What gets checked
+
+Defined in `flake.nix` (the `treefmt`, `pre-commit`, and `checks` blocks) and
+`statix.toml`:
+
+| Check        | Tool                              | Covers                                                  |
+| ------------ | --------------------------------- | ------------------------------------------------------- |
+| `formatting` | treefmt → `nixfmt`                | all `*.nix`                                             |
+| `formatting` | treefmt → `shfmt`                 | shell scripts                                           |
+| `formatting` | treefmt → `prettier`              | **Markdown, YAML, JSON** (incl. `README.md`, this file) |
+| `deadnix`    | deadnix                           | dead Nix bindings (`--no-lambda-pattern-names`)         |
+| `statix`     | statix                            | Nix antipatterns (config in `statix.toml`)              |
+| pre-commit   | nixfmt-rfc-style, deadnix, statix | the same gates, run on commit                           |
+
+Excluded from formatting: `*/hardware-configuration.nix` (generated by
+`nixos-generate-config`) and `flake.lock`. Editor defaults (indent, EOL, final
+newline) are in `.editorconfig`; note Markdown keeps trailing whitespace, which
+encodes hard line breaks.
+
+## Docs are checked too — the common trap
+
+prettier formats `*.md`, so **documentation edits must be run through `nix fmt`**
+exactly like code. prettier re-aligns Markdown tables in particular; hand-editing
+a table almost always leaves it non-conformant and fails the `formatting` check.
+
+Beware a false green: the CI `detect` step skips the heavy checks on a pull
+request that touches **no** `.nix`, `flake.lock`, or the workflow file — so a
+docs-only PR reports success without ever running prettier. The failure then
+surfaces on the push-to-`main` run (which always runs the full check) or on the
+next unrelated PR that does touch Nix. Run `nix flake check` locally before
+merging a docs change, regardless of what the PR check shows.
+
+## Host evaluation
+
+CI also evaluates every `nixosConfigurations` / `darwinConfigurations` host's
+toplevel (eval only, no build) on an x86_64 runner, so eval errors fail cheaply.
+Reproduce locally:
+
+```sh
+nix eval --raw ".#nixosConfigurations.<host>.config.system.build.toplevel.drvPath"
+```
+
+Host lists are discovered from the flake, so adding or removing a host needs no
+change to the workflow.

README.md

@@ -55,17 +55,17 @@ module reaches a host: **baseModules** (every NixOS host, via `flake.nix`),
 **host table** (listed explicitly per host in `flake.nix`), or **transitively**
 (pulled in by another module's `imports`).
 
-| Module               | Imported by                             | What it does / when to use it                                                                                                                                                                    |
-| -------------------- | --------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `common-nixos.nix`   | baseModules (all NixOS)                 | Timezone/locale, store hygiene (auto-optimise, big download buffer, **no** auto-GC), the nix-community binary cache, `nix-ld`, base CLI (`git`, `fastfetch`), and the fleet-wide font stack.     |
-| `users.nix`          | baseModules (all NixOS)                 | Builds `users.users` from the registry for the host's `hostUsers`; enables zsh; enables Firefox + Thunderbird **only** when `features.swayDesktop.enable` is on. Applies per-user `linger`.       |
-| `features.nix`       | baseModules (all NixOS)                 | Declares feature-flag options (currently `features.swayDesktop.enable`) so any host can read/set them without importing the heavy implementation module.                                          |
-| `workstation.nix`    | transitively (via laptop/desktop)       | Form-factor-agnostic base for physical graphical hosts: turns on `swayDesktop`, Dvorak console, PipeWire, firewall (default-deny), fstrim, earlyoom, fwupd, thermald (x86), redistributable fw.  |
-| `laptop.nix`         | host table (MBP, T400)                  | `imports` workstation.nix, then adds the portable bits: iwd Wi-Fi, lid suspend/lock, Bluetooth + blueman.                                                                                        |
-| `desktop.nix`        | host table (Mac Pro)                    | `imports` workstation.nix, then swaps Wi-Fi for wired NetworkManager. Pair with `portable = false` in the host table.                                                                            |
-| `sway.nix`           | host table (graphical hosts)            | Implementation of `features.swayDesktop`: the system Sway package, the greetd/ReGreet (cage) greeter forced to Dvorak, xdg-portal, Wayland utility packages. Home-side Sway config is in `home/sway.nix`. |
-| `ssh.nix`            | host table (T400, Mac Pro, RPi5)        | Enables sshd, opens port 22, enforces a key-only policy (no password / keyboard-interactive, no root). Authorized keys come from the registry via `users.nix`.                                    |
-| `firmware/`          | referenced by MBP host config           | Committed Apple peripheral firmware blobs for the Asahi MBP (see "MacBook (Asahi) firmware").                                                                                                     |
+| Module             | Imported by                       | What it does / when to use it                                                                                                                                                                             |
+| ------------------ | --------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `common-nixos.nix` | baseModules (all NixOS)           | Timezone/locale, store hygiene (auto-optimise, big download buffer, **no** auto-GC), the nix-community binary cache, `nix-ld`, base CLI (`git`, `fastfetch`), and the fleet-wide font stack.              |
+| `users.nix`        | baseModules (all NixOS)           | Builds `users.users` from the registry for the host's `hostUsers`; enables zsh; enables Firefox + Thunderbird **only** when `features.swayDesktop.enable` is on. Applies per-user `linger`.               |
+| `features.nix`     | baseModules (all NixOS)           | Declares feature-flag options (currently `features.swayDesktop.enable`) so any host can read/set them without importing the heavy implementation module.                                                  |
+| `workstation.nix`  | transitively (via laptop/desktop) | Form-factor-agnostic base for physical graphical hosts: turns on `swayDesktop`, Dvorak console, PipeWire, firewall (default-deny), fstrim, earlyoom, fwupd, thermald (x86), redistributable fw.           |
+| `laptop.nix`       | host table (MBP, T400)            | `imports` workstation.nix, then adds the portable bits: iwd Wi-Fi, lid suspend/lock, Bluetooth + blueman.                                                                                                 |
+| `desktop.nix`      | host table (Mac Pro)              | `imports` workstation.nix, then swaps Wi-Fi for wired NetworkManager. Pair with `portable = false` in the host table.                                                                                     |
+| `sway.nix`         | host table (graphical hosts)      | Implementation of `features.swayDesktop`: the system Sway package, the greetd/ReGreet (cage) greeter forced to Dvorak, xdg-portal, Wayland utility packages. Home-side Sway config is in `home/sway.nix`. |
+| `ssh.nix`          | host table (T400, Mac Pro, RPi5)  | Enables sshd, opens port 22, enforces a key-only policy (no password / keyboard-interactive, no root). Authorized keys come from the registry via `users.nix`.                                            |
+| `firmware/`        | referenced by MBP host config     | Committed Apple peripheral firmware blobs for the Asahi MBP (see "MacBook (Asahi) firmware").                                                                                                             |
 
 Form-factor decision: a **laptop** imports `laptop.nix` (default
 `portable = true`); a **wired desktop** imports `desktop.nix` and sets

flake.lock

@@ -25,11 +25,11 @@
       },
       "locked": {
         "dir": "pkgs/firefox-addons",
-        "lastModified": 1783310567,
-        "narHash": "sha256-bfEUQh8NZUT+/4A/vDZhjeaQplS9NujWhBuldgOTDQk=",
+        "lastModified": 1783656166,
+        "narHash": "sha256-6WP/DOGL2X6DdZl+vhxt/R7Ahn31z0cwo3JJ0cYFC2M=",
         "owner": "rycee",
         "repo": "nur-expressions",
-        "rev": "24b4ed9093cbe20ee6fc539fd10bdf928ee68db3",
+        "rev": "dd7e87fef8e4b30bfbf59418c48ddd3ab4ddb42e",
         "type": "gitlab"
       },
       "original": {
@@ -231,11 +231,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1783233851,
-        "narHash": "sha256-jzisD+3wWZPC4QvAsKtYguiGsmlH2SN3Mjx5LWd68Ok=",
+        "lastModified": 1783414108,
+        "narHash": "sha256-RY8e+gR2/DhXsYDxGDL6Hhe9+POD9u4+llwxMBqMQDs=",
         "owner": "nix-community",
         "repo": "nix-index-database",
-        "rev": "fab14c7b63499d57cb6673d5690168c3ec42b99a",
+        "rev": "96d6de10eb281b98f5cfcd1841394c03da5df77c",
         "type": "github"
       },
       "original": {
@@ -252,11 +252,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1783079127,
-        "narHash": "sha256-mNuifmp/gJ73tsLDAf6Q4iwhuDCSrS88G7BlvAsa42E=",
+        "lastModified": 1783669315,
+        "narHash": "sha256-DjIkyK48jWUxYCCoTDS9L5PgGg6/RFRSRXW2dSFpJg8=",
         "owner": "nix-community",
         "repo": "nixos-apple-silicon",
-        "rev": "8c666069ee3070445b1040f9aa357b78c08eb9ce",
+        "rev": "9e46a0edd8a6d96538d146a4bb4477e7fae8b1a0",
         "type": "github"
       },
       "original": {
@@ -272,11 +272,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1782562157,
-        "narHash": "sha256-a7+T6QSeowynwZ1ZJJbP8T8ntAytvrui8kFGJmIZt2c=",
+        "lastModified": 1783673680,
+        "narHash": "sha256-ardRVG+ipnyyxVdIsbLMy5foO6gDqN/yIi8v10HTJqs=",
         "owner": "NixOS",
         "repo": "nixos-hardware",
-        "rev": "a9cf7546a938c737b079e738de73934a13de9784",
+        "rev": "0b655af52b5b89bcceb88737efdc3a7498e751ee",
         "type": "github"
       },
       "original": {
@@ -308,11 +308,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1783148766,
-        "narHash": "sha256-uslt2pqShTIXDdAHRHv2QkYLsVdY8Oqwz0EA48/RSM8=",
+        "lastModified": 1783389287,
+        "narHash": "sha256-0xIy4dVLqq47rA+mRy0hXDfjhQd4E5PoIns/RmB7nR4=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "a50de1b7d8a586adc18d2395c19de7d6058e6030",
+        "rev": "0ad6f47ea4fe188f4bc8f0380f93ae8523337c6c",
         "type": "github"
       },
       "original": {
@@ -324,11 +324,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1783224372,
-        "narHash": "sha256-8i/87eeoqiGE4yOTjwSA3Eh/ziJRQEmd/unYU+K27sk=",
+        "lastModified": 1783522502,
+        "narHash": "sha256-iffAls3iaNTyJC2faYcUXSI+Gp02cDjYl+MygxKl2GI=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "d407951447dcd00442e97087bf374aad70c04cea",
+        "rev": "0bb7ec54c8483066ec9d7720e780a5caa71f8612",
         "type": "github"
       },
       "original": {

home/claude/memory/MEMORY.md

@@ -5,7 +5,9 @@
 - [Git commit signing](git_commit_signing.md) — signs in-sandbox via ssh-agent (allowAllUnixSockets + inlined pubkey)
 - [Git check state first](git_check_state.md) — always check branch/status/divergence before git work; Lyra edits repos between sessions
 - [Keep docs updated](docs_keep_updated.md) — update docs in the same pass as code/config changes; stale docs are a defect
+- [SIBO Workabout MX project](sibo_workabout_mx_scanner.md) — RE + barcode-inventory project state; scanner is an OO DYL object (oscanner), blocked on on-device ordinal capture; resume via code/inventory/CONTINUATION.md
 - [Jira tooling](jira_tooling.md) — comments are Markdown not wiki; transitions may need assignee; link direction; WSP transition IDs
 - [Review and comments workflow](workflow_review_and_comments.md) — show PR body and non-trivial Jira comments before posting; terse IaC code comments; PR body content rules
 - [Sandbox prompts](feedback_sandbox_prompts.md) — don't prompt for sandbox-disable or routine read-only shell ops; broaden permissions instead
 - [Dev clusters disposable](dev_clusters_disposable.md) — Lyra's dev clusters are recreatable; mutate/break freely, no confirmation needed
+- [Nix shell tooling](nix_shell_tooling.md) — any nixpkgs tool runs ad hoc via `nix run`/`nix shell nixpkgs#<pkg>`; a missing command is never a dead end

home/claude/memory/nix_shell_tooling.md

@@ -0,0 +1,23 @@
+---
+name: nix-shell-tooling
+description: "Any nixpkgs tool can be run ad hoc via nix run / nix shell — a missing command is never a dead end during development"
+metadata:
+  node_type: memory
+  type: feedback
+  originSessionId: dfb56b58-518b-4daf-b531-7119bb4a9534
+---
+
+Any tool in nixpkgs can be run without installing it into the environment. If a
+command is missing during development, pull it from nixpkgs on the fly instead
+of working around its absence or reporting the tool as unavailable.
+
+**Why:** Lyra runs NixOS; the ambient PATH is deliberately minimal, but the full
+nixpkgs set is always one command away. "command not found" is not a blocker.
+
+**How to apply:**
+
+- One-off run: `nix run nixpkgs#<pkg> -- <args>` (e.g. `nix run nixpkgs#jq -- .`).
+- Tools on PATH for a session: `nix shell nixpkgs#<pkg> [nixpkgs#<pkg2> ...]`,
+  then run commands normally.
+- Legacy form also works: `nix-shell -p <pkg> --run '<cmd>'`.
+- Prefer this over hand-rolling a substitute for a tool that exists in nixpkgs.

home/claude/memory/sibo_workabout_mx_scanner.md

@@ -0,0 +1,24 @@
+---
+name: sibo-workabout-mx-scanner
+description: State of the Psion Workabout MX reverse-engineering / barcode-inventory project and how to resume it
+metadata:
+  node_type: memory
+  type: project
+  originSessionId: 74de014e-9cf4-47f6-92f4-c34197ac1858
+---
+
+Long-running project (July 2026) reverse-engineering the **Psion Workabout MX** (SIBO OS, NEC V30MX, TopSpeed C) to build a barcode **inventory demo** (scan UPC → DBF database file; add stock, consume by a quantity unit) and, alongside, **complete device programming documentation**. Repo: Gitea **lyrathorpe/sibo-playground**, working branch **`feat/inventory-phase1-scan`** (unmerged). Gitea needs hand-off / the contents API for pushes — see [[git-network-ops]]; [[git-conventions]] for branch/PR rules.
+
+**Committed on the branch (durable, survive reboot):**
+- `docs/reference/00-08` + index — the SIBO/MX programming reference (building apps, system/OS, I/O devices, PLIB core, file system & DBF, UI, hardware, and RE'd boot/OS-call internals).
+- `code/inventory/` — app scaffold: `upc.c/.h` (UPC-A check-digit validation, correct), `bcode.c/.h`, `scan.c` (Phase-1 diagnostics), `README.md`, **`SCANNER-API.md`** (all scanner findings), **`CONTINUATION.md`** (the on-device debugging procedure to finish).
+- `docs/mx-re/toolchain-and-plan.md` — the RE toolchain.
+- The **ROM `w2mx_v7.20f_eng.bin`** and the full **SDK + HDK** (manuals as `docs/*.txt`; headers/libs/`bar*.ldd` under `code/SIBOSDK/`; HDK under `code/HDK/`) are on the branch. `/tmp/claude/sibo/` working files (ROM slices, MAME rom dir, Ghidra/decomp output) are transient and reproducible from the toolchain doc.
+
+**Scanner — key result:** the integral laser is driven as an **OO library object** in `SCANNER.DYL` (category token **`oscanner`**) via `p_getlibh` → `p_newsend`/`f_newsend` → `p_send`, over **LIBMANAGER (INT 0x84)** / **MESSMANAGER (INT 0x83)** — NOT raw device I/O. Confirmed on the physical device: `p_open("WL2:D")` + control ops **6** then **7** (`p_iow(chan,6); p_iow(chan,7)`) fire the laser to a good decode (green LED). Default Symbol2 11-byte param block: `04 3f 01 15 06 04 1e 80 0d 0a 06` (decoded output is CR/LF-terminated). Dead ends (do not retry): raw `TTY:D` reads, and the wand `BAR:` / `bar*.ldd` decoders (probe expansion slots → `-41`).
+
+**Blocked on / next step:** the OO **message ordinals + parameter structs** for init / set-params / trigger / read. OLIB assigns ordinals dynamically across the class hierarchy (base classes in `olib`/`hwim`), so they resolve only at runtime — capture them with the **SIBO Debugger on the physical device** (remote debug over serial; it supports breakpoints inside DYLs). MAME cannot inject a barcode, so the last mile must be on hardware. Full step-by-step is in `code/inventory/CONTINUATION.md`.
+
+**RE toolchain (reproducible):** the ROM is MAME machine **`psionwamx`**; run its debugger headless via `xvfb-run -a mame psionwamx -rompath roms -debug -debugscript CMDS -sound none -seconds_to_run N` (MAME lua input injection into the keyboard matrix does NOT work headless — a known limitation). Static: **radare2** (16-bit x86). Decompile: **Ghidra headless** (processor `x86:LE:16:Real Mode`, a Java GhidraScript — Ghidra 12 has no bundled Python). Get MAME/radare2/Ghidra via `nix-shell -p ...`. Details in `docs/mx-re/toolchain-and-plan.md`.
+
+**Fallback to deliver value now:** Phase 2 (the DBF inventory: add stock, consume by quantity) can be built with keyboard UPC entry against `docs/reference/05-filesystem-dbf.md`, dropping the scanner in behind the same interface once retrieval is finished. [[docs-keep-updated]]