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
Record that any nixpkgs tool can be run on the fly via nix run / nix
shell, so a missing command during development is not a dead end. Takes
effect after a home-manager rebuild.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
## Summary
Separates user identity (data) from the reusable Nix modules and lets a host declare any number of users, replacing the previous one-user-per-host structure. Also restructures the tree and exposes the home config for use off these hosts.
## Changes
- **User registry** (`users/registry.nix`): per-user identity (name, email, groups, authorized + signing keys) as the single source of truth; no user data hardcoded in modules.
- **Multi-user `mkHost`**: a host declares a `users` set keyed by username; per-user identity is injected into each home config via the `identity` module arg.
- **Restructured layout**: `users/`, `home/`, `modules/`, `hosts/`, `lib/` replace the former `lyrathorpe/` and `system/` trees.
- **Portable outputs**: standalone `homeConfigurations."<user>@<system>"` (the portable subset — shell, git, editor, claude) plus an exported `homeModules` for use on machines not managed by this flake, or as an input to other flakes.
- Docs (`README.md`, `home/README.md`) and `.gitignore` updated for the new paths.
## Fixes
- Closes#46 — shared user module authorized one user's SSH key for every account.
- Closes#47 — git committer identity hardcoded as defaults instead of per-user.
- Closes#48 — EDaaS systemd linger hardcoded to a literal username.
## Verification
- `nix flake check` passes: treefmt, deadnix, statix, pre-commit, and evaluation of all NixOS hosts + Darwin + homeConfigurations.
- Derivation-path comparison vs `main`: `lyrathorpe-mbp` and `emmathorpe-edaas` are byte-identical; `lyrathorpe-t400`, `lyrathorpe-macpro31` and `lyrathorpe-rpi5` differ only by de-duplicating a repeated `authorized_keys` entry (confirmed with nix-diff — no other change).
- Standalone `homeConfigurations."lyrathorpe@x86_64-linux".activationPackage` builds.
## Notes
- `emmathorpe` has no personal authorized key yet (it previously inherited Lyra's key via the bug in #46); the registry entry is intentionally empty — add a real key if SSH login as `emmathorpe` is wanted (moot on the WSL host).
- A two-repo (public dotfiles / private systems) split is deferred by design; this internal restructure is the prerequisite for it.
---------
Co-authored-by: Emma Thorpe <emma.thorpe@citrix.com>
Reviewed-on: #49
lyrathorpe
