Consolidate CI on codex-maintenance.sh; clean up dead scripts and docs

Both check-nixos.yml workflows (GitHub + Gitea) now call scripts/codex-maintenance.sh instead of a hand-rolled eval-only loop, closing a real gap: CI previously enforced none of the secret grep, nixpkgs-fmt, or statix checks that codex-maintenance.sh already runs locally — nothing was stopping that from regressing. One script now backs both, instead of two copies that can drift from each other. codex-maintenance.sh itself is extended to cover buildable surface that wasn't validated anywhere before: packages.x86_64-linux.*, plus config.system.build.tarball (lxc-* hosts) and config.system.build.diskoImagesScript (proxmox-*, excluding the installer's own proxmox-lxc target, which has no disko config). Also: - scripts/prepare-host-key.sh: dropped the redundant [path-to-nixos-repo] parameter — it always defaults to the repo the script itself lives in now, so a second argument never made sense after the nix-auto-installer migration. - Removed prepare.sh (dead pre-disko manual parted/mkfs/mkswap partitioning, fully superseded) and scripts/create-linode-installer-disk.sh (incomplete draft for an abandoned dd-via-rescue-mode approach; Linode hosts already deploy fine through the normal auto-installer flow). - docs/pxe-boot.md: fixed a stale `nixosConfigurations.pxe-boot` eval command (pre-refactor flat name, not a real flake attribute anymore) and added a cross-reference to docs/auto-installer.md. - CLAUDE.md/README.md: full documentation pass reconciling this session's changes — modules/installer/, modules/pxe-boot/, the LXC/Proxmox image-building deployment paths, corrected the password-hash/SSH-key locations in the safety-rules section (both had drifted to reference files/paths that no longer exist), and added session-workflow guidance to prefer targeted host evals over full-repo sweeps for incremental changes (explicitly scoped to interactive sessions, not CI). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01La55Nsss8jZ7ZuzUV9mfot
Register sops age key for proxmox-minimal
2026-07-20 07:02:23 +10:00 · 2026-07-20 07:01:56 +10:00 · 2026-07-20 07:01:33 +10:00 · 2026-07-20 05:58:56 +10:00 · 2026-07-20 04:41:34 +10:00 · 2026-07-20 04:08:19 +10:00
64 changed files with 709 additions and 4024 deletions
@@ -13,17 +13,9 @@ jobs:
    steps:
      - name: Check out repository
        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@v19

-      # Scoped to files changed since the PR base / previous push -- see
-      # scripts/codex-maintenance.sh. CI never passes --full-check: that
-      # full sweep is for local/manual use, since it's slow enough to time
-      # out this runner.
-      - name: Run maintenance checks (secrets, fmt, lint, eval -- changed files only)
-        env:
-          MAINT_BASE_SHA: ${{ github.event.pull_request.base.sha || github.event.before }}
+      - name: Run maintenance checks (secrets, fmt, lint, eval)
        run: bash scripts/codex-maintenance.sh
@@ -13,17 +13,9 @@ jobs:
    steps:
      - name: Check out repository
        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@v19

-      # Scoped to files changed since the PR base / previous push -- see
-      # scripts/codex-maintenance.sh. CI never passes --full-check: that
-      # full sweep is for local/manual use, since it's slow enough to time
-      # out this runner.
-      - name: Run maintenance checks (secrets, fmt, lint, eval -- changed files only)
-        env:
-          MAINT_BASE_SHA: ${{ github.event.pull_request.base.sha || github.event.before }}
+      - name: Run maintenance checks (secrets, fmt, lint, eval)
        run: bash scripts/codex-maintenance.sh
@@ -3,19 +3,9 @@
 result
 result-*

-# Disko's proxmox-* image-builder writes the finished .raw disk image
-# directly into the current directory, not into a result-* symlink (see
-# docs/proxmox-images.md, scripts/create-proxmox-resource.sh) — several GB
-# each, never meant to be committed.
-*.raw
-
 # Ignore automatically generated direnv output
 .direnv

-# Python bytecode cache (scripts/lib/*.py)
-__pycache__/
-*.pyc
-
 # Locally-generated SSH host keys staged for transfer to a new machine
 # during install (see scripts/prepare-host-key.sh) — never commit these.
 host-keys/
@@ -1,15 +1,12 @@
 keys:
-  - &admin age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad
+  - &admin age10nd382a9klsn2mrs60emdtsxe43pht3a0m9p29phfrhy0wfyt3vsq9r667
  - &docker age19gfn2yedg76dmztm4hncr7vf3r3c9j0qpt4rap7y7gersjk4m3ks2lhd0e
  - &server age1ll6hj5ggruetgjwjfnplpn5xtq35uhlcdflksx3xmnjm6s3uad9sz70jkf
  - &nix-cache age120le4a5l8dh3lyfgvmj3d9ksmej6ajs5mer5y7r0vfg3x9fn69dqf8xgzu
+  - &lxc-minimal age1qz9d4ka4xgexujyd247s7lp737sulp5fhxl5d65fj2ykvc4j4edqrsdks8
  - &nix-minimal age120whqj96g26lsgy4udvgsn8dc9lumh8jeu3a564fx79rjr5lxffqmrljuu
+  - &lxc-nix-cache age164px2a8e48ptsf9ngtan38aa6jls4jdl26mzrgzf6sn3vcvt49hqjrgr8w
  - &proxmox-minimal age10at8862478urh0eeuwh8hzln6ck78jgwtztgxatwqlzwagg77y5snm4xzg
-  - &lxc-nix-cache age1xjst4frdh0th6q8m7p7u9g5af7ty5jqeum0p6z8a52a9q7st7ewqw8yl9j
-  - &lxc-docker age1ezk9x53zt8kcnscdm80jcyf0xq97vndv7jsn3rl8cc0cwm2jmpmq372dzs
-  - &lxc-minimal age1jy444f9d9stygj4p3w9kh54cqcfr654tvr75tdvee5cxsgtdtc9q3v60ep
-  - &lxc-pxe-boot age1fxxzpnfse8nd9wz78ht3m0plrmraacf4cpga0pe8fm2tdnqcgy8q7qsyvp
-  - &lxc-gui age190htw7prp4vln076dxjx3gxxaq06h0zl0te7cqgpx79vl3lhkaes8suy05

 creation_rules:
  # Shared across every currently-deployed host: root/nixos password hash,
@@ -27,9 +24,6 @@ creation_rules:
          - *nix-minimal
          - *lxc-nix-cache
          - *proxmox-minimal
-          - *lxc-docker
-          - *lxc-pxe-boot
-          - *lxc-gui

  - path_regex: secrets/nix-cache\.yaml$
    key_groups:
@@ -7,7 +7,7 @@ servers and workstation.

 The flake exposes NixOS configurations named `<platform>-<buildtype>`
 (platforms: `linode`, `proxmox`, `lxc`; build types: `minimal`, `nix-cache`,
-`server`, `docker`, `gui`, `pxe-boot`, `tailscale-exit-node`, `tor-relay`), generated from `modules/platforms/*`
+`server`, `docker`, `gui`, `pxe-boot`), generated from `modules/platforms/*`
 and `modules/build-types/*` by the `mkTarget` function in `flake.nix`. Not
 every combination is built — `pxe-boot` has no `linode` variant. See
 `README.md` for the full current target list; treat `flake.nix` as the
@@ -35,14 +35,9 @@ Use these commands when validating changes:
 ```bash
 bash scripts/codex-setup.sh
 bash scripts/codex-maintenance.sh
+bash scripts/codex-maintenance.sh dry-run
 ```

-With no flags, `codex-maintenance.sh` scopes fmt-check/statix/eval to files
-changed against a base ref — this is what CI runs on every push/PR. For the
-full sweep (every host, every package — slow; CI never runs this), use
-`bash scripts/codex-maintenance.sh --full-check` (add `--dry-run` for build
-planning on top of whichever scope is active).
-
 Host evaluation is safe when limited to drvPath checks:

 ```bash
@@ -37,22 +37,11 @@ machines when deployed.
 # One-time environment bootstrap (installs Nix if missing, prints hosts)
 bash scripts/codex-setup.sh

-# Changed-files-only validation: secret grep (whole repo), nixpkgs-fmt --check
-# and statix on changed *.nix files, eval of the hosts/packages those changes
-# can affect. This is what CI runs on every push/PR.
+# Full validation: secret grep, nixpkgs-fmt --check, statix lint, eval all hosts
 bash scripts/codex-maintenance.sh

-# Full sweep: nixpkgs-fmt --check/statix over the whole tree, eval every host
-# and package. Slow (minutes) -- CI never runs this; use it locally before a
-# release or after touching modules/common/*, flake.nix, or variables.nix for
-# extra confidence beyond the automatic full-fallback those paths already
-# trigger in the default mode (see below).
-bash scripts/codex-maintenance.sh --full-check
-
-# Either mode, plus a dry-run build (no result symlink) of every host/package
-# in whichever scope is active
-bash scripts/codex-maintenance.sh --dry-run
-bash scripts/codex-maintenance.sh --full-check --dry-run
+# Same, plus a dry-run build (no result symlink) of every host's toplevel
+bash scripts/codex-maintenance.sh dry-run

 # List the hosts the flake currently exposes
 nix eval --json .#nixosConfigurations --apply builtins.attrNames | jq -r '.[]'
@@ -69,169 +58,17 @@ maintenance script pulls them via `nix run github:NixOS/nixpkgs/nixos-25.11#<too
 There is no test suite — "correctness" here means the flake evaluates and
 `nixpkgs-fmt`/`statix` are clean.

-With no flags, `codex-maintenance.sh` diffs against a base ref (env
-`MAINT_BASE_SHA`, else the PR base SHA in CI, else `HEAD^` locally) and scopes
-fmt-check/statix to the changed `*.nix` files and eval to the hosts/packages
-those changes can affect — a `hosts/<name>/host.nix` edit only evals that
-host's targets, a `modules/platforms/<platform>.nix` edit only evals that
-platform's hosts, and so on. A change to `flake.nix`, `flake.lock`,
-`variables.nix`, `modules/common/*`, or any other `modules/*.nix` file outside
-`platforms/`/`build-types/` (whose blast radius isn't safely inferable from
-the path alone) falls back to evaluating every host and package, same as
-`--full-check` would, just without the whole-tree fmt/statix sweep. This
-exists because the whole-tree sweep is what was timing out CI; **CI always
-runs the plain, no-flag form and never passes `--full-check`.**
-
-The default mode's diff is against the working tree (uncommitted and staged
-edits included, not just committed ones), so it's already the right tool for
-an interactive session too: after editing one or two hosts/modules, plain
-`bash scripts/codex-maintenance.sh` naturally scopes to just what you
-touched. Reserve `--full-check` for changes that plausibly affect every host
-(`modules/common/*`, `flake.nix`, `variables.nix` — though the default mode
-already falls back to evaluating everything for those paths, `--full-check`
-additionally re-checks fmt/statix over the whole tree) or as a final check
-before committing.
-
-## Scripts
-
-Beyond `codex-setup.sh`/`codex-maintenance.sh` above, `scripts/` is
-organized by purpose: `scripts/secrets/` (sops/age + SSH host-key
-management), `scripts/proxmox/` (Proxmox deployment), `scripts/lib/`
-(shared helpers, sourced by the scripts below — not run directly), and a
-handful of repo-wide scripts left at the top level (`env.sh`,
-`bump-nixpkgs-release.sh`, plus `codex-setup.sh`/`codex-maintenance.sh`
-above). When adding a new script, put it in the matching subfolder rather
-than the top level, and if it duplicates logic another script already has,
-lift the shared part into `scripts/lib/` instead of copying it.
-
-### `scripts/secrets/`
-
- `scripts/secrets/sync-host-keys.sh` — generates/registers SSH host keys
-  and their `.sops.yaml`/`secrets/*.yaml` recipients for flake targets,
-  idempotently (`--all`, `<target>`, `--remove`, `--regenerate-all-keys`,
-  all with `--dry-run`). The primary tool for provisioning a new host's
-  secrets access — see "Creating a new machine" in `docs/auto-installer.md`.
- `scripts/secrets/prepare-host-key.sh` — narrower predecessor: generates a
-  key by an arbitrary name without touching `.sops.yaml`. Still useful to
-  pre-generate a key before its flake target exists yet, since
-  `sync-host-keys.sh` can only act on targets `nixosConfigurations` already
-  has.
- `scripts/secrets/rotate-admin-key.sh <backup-admin-key> [--new-key-file
-  <path>] [--dry-run]` — rotates `.sops.yaml`'s `&admin` age key: decrypts
-  with a backed-up copy of the key currently trusted as `&admin` (verified
-  by deriving its public key and comparing, not taken on faith), replaces
-  the `&admin` line with a new key already present in the environment
-  (defaults to wherever sops/age itself would look), and runs
-  `sops updatekeys` on every `secrets/*.yaml`. One-way: the old key can no
-  longer decrypt anything re-encrypted this way. This is the automation
-  for the manual steps `sync-host-keys.sh`/`create-proxmox-resource.sh`
-  print when they bootstrap a brand-new, not-yet-trusted key on a machine
-  with no prior admin access.
- `scripts/secrets/backup-admin-key.sh <dest-path> [--key-file <path>]
-  [--force] [--dry-run]` — copies the local sops age key (source
-  resolution matches sops/age itself: `$SOPS_AGE_KEY` inline, then
-  `--key-file`, then `$SOPS_AGE_KEY_FILE`, then the XDG default) to an
-  arbitrary destination path with `0600` permissions, validating it's a
-  real age identity and round-tripping the public key before and after the
-  write. Refuses to overwrite an existing `<dest-path>` without `--force`.
-  Purely a local filesystem copy — never touches `.sops.yaml`/
-  `secrets/*.yaml` or the repo at all. The resulting file is exactly what
-  `rotate-admin-key.sh` expects as its backup-key argument.
- `scripts/secrets/sync-nix-cache-host-key.sh [--check] [--dry-run]
-  [--host <name>]` — detects drift between the ed25519 SSH host key
-  nix-cache is actually serving right now (via `ssh-keyscan`) and
-  `vars.nixCacheHostKey` (`variables.nix`), the value
-  `modules/nix-cache/remote-builder-client.nix` bakes into every real
-  client's declarative `programs.ssh.knownHosts` and
-  `configure-nix-cache-client.sh` hardcodes as its own default for
-  non-NixOS clients. That value has no automatic source of truth — it's
-  set once from whatever nix-cache's host key happened to be at the time,
-  and silently goes stale if the host is ever rebuilt/recreated with a new
-  key, breaking every client's distributed-build SSH trust with no error
-  that points back here. `--check` (used by `codex-maintenance.sh`, which
-  treats an unreachable nix-cache — e.g. from a non-LAN CI runner — as a
-  silent skip rather than a failure) only reports drift; the no-flags form
-  updates both files in place. Declarative clients still need a rebuild to
-  pick up the fix.
-
-### `scripts/proxmox/`
-
- `scripts/proxmox/create-proxmox-resource.sh` — builds a `lxc-*`/
-  `proxmox-*` target's tarball/disk image and creates it on a real Proxmox
-  node (`pct create` against the tarball as a CT template / `qm create`+
-  `importdisk`), or reconfigures an existing resource's cores/memory/disk
-  size (`--modify`, always requires typing the VMID back to confirm).
-  Checks for an already-uploaded image on the node before building
-  (`--force-rebuild` to skip that and always rebuild), and probes
-  nix-cache's substituter/remote-builder reachability once up front rather
-  than letting every `nix build` call retry against it individually.
-  Refuses to create a target whose host identity already exists live on
-  the node (checked directly via `qm`/`pct`, not any file in this repo)
-  unless `--allow-duplicate-host` is passed. `--dry-run` throughout both
-  modes. The first time it has to bootstrap build tooling on a node (i.e.
-  `nix` wasn't already on its `PATH`), it also runs
-  `scripts/proxmox/configure-nix-cache-client.sh` there (non-fatally — a
-  failure just falls back to building from source / `cache.nixos.org`) so
-  the node substitutes from and can offload builds to nix-cache on every
-  subsequent run, not just this one.
- `scripts/proxmox/configure-nix-cache-client.sh [--dry-run]
-  [--no-remote-builder] [--no-restart]` — the non-NixOS equivalent of
-  `modules/nix-cache/client.nix`/`remote-builder-client.nix`, for a plain
-  Debian machine with the Nix package manager (not NixOS) already
-  installed: run as root *on that machine* to add nix-cache as a
-  substituter in `/etc/nix/nix.conf` (`https://cache.nixos.org/` kept as
-  fallback) via `extra-substituters`/`extra-trusted-public-keys` so it
-  layers on top of whatever's already there instead of clobbering it, and,
-  if `/root/.ssh/nixremote` is already present (see docs/nix-cache.md
-  "Remote builder SSH keys"), configures it as a distributed-build
-  machine too and trusts nix-cache's SSH host key in
-  `/etc/ssh/ssh_known_hosts`. Idempotent (re-running replaces its own
-  marked block rather than duplicating it); restarts `nix-daemon` by
-  default so the change takes effect immediately.
-
-### `scripts/lib/`
-
-Sourced by the scripts above, never run directly:
-
- `nix-bootstrap.sh` — `NIX_CONFIG`/`ensure_nix_profile`, shared by
-  `codex-setup.sh`/`codex-maintenance.sh` and the remote build commands
-  `create-proxmox-resource.sh` runs over SSH.
- `nix-eval.sh` — `NIX_EVAL_FLAGS` plus `list_flake_targets`/
-  `flake_target_hostname` flake-introspection helpers.
- `ssh-host-keys.sh` — `generate_host_ed25519_key`/`ssh_pubkey_to_age`,
-  shared by `sync-host-keys.sh` and `prepare-host-key.sh`.
- `sops-age.sh` — `age_pubkey_from_identity_file`/`sops_yaml_admin_pubkey`/
-  `sops_updatekeys` plus the shared sops/age default key-file resolution,
-  shared by `backup-admin-key.sh`, `rotate-admin-key.sh`, and
-  `sync-host-keys.sh`.
- `confirm.sh` — `confirm_typed`, the "type X back to confirm" destructive-
-  action prompt shared by `create-proxmox-resource.sh` and
-  `sync-host-keys.sh`.
- `sync-host-keys-edit-sops.py` — the `.sops.yaml` anchor/key_groups editor
-  `sync-host-keys.sh` shells out to (see that script for why: precise,
-  idempotent YAML edits are impractical in bash).
-
-### Top level
-
- `scripts/env.sh` — shared config (`PROXMOX_HOST`, storage pool, bridge,
-  default cores/memory) sourced by `create-proxmox-resource.sh`. Add new
-  cross-script config here instead of duplicating it per-script.
- `scripts/bump-nixpkgs-release.sh` — bumps `flake.nix`'s `nixpkgs.url`/
-  `home-manager.url` in place. Exists because flake input URLs can't
-  reference `variables.nix` (confirmed empirically — `nix flake metadata`
-  errors on it), so this is the closest equivalent to a single source of
-  truth for the tracked release.
-
-`sync-host-keys.sh`, `create-proxmox-resource.sh`, and
-`rotate-admin-key.sh` genuinely mutate real state when run for real (not
-`--dry-run`): real `secrets/*.yaml` recipients, real Proxmox VMs/
-containers, real revocation of decrypt access. They require the
-operator's own SSH/sops access, which an agent session doesn't have — but
-don't suggest running any of them non-dry-run without the operator's
-explicit go-ahead even if it becomes technically reachable.
-`backup-admin-key.sh` only writes a key copy to a path the operator gives
-it — lower-stakes than the others, but it still handles a real private
-key, so treat its destination path choice as the operator's call too.
+**In an interactive agent session**, prefer targeted checks over full-repo
+sweeps: after editing one or two hosts/modules, evaluate just the
+`nixosConfigurations.<host>` you touched (plus any `config.system.build.tarball`
+/`diskoImagesScript`/package output affected) rather than looping over every
+host — `codex-maintenance.sh` evaluates 19 hosts plus every package/tarball/
+image variant now and is slow to run after each small change. Reserve a full
+`codex-maintenance.sh` run for changes that plausibly affect every host
+(`modules/common/*`, `flake.nix`, `variables.nix`) or as a final check before
+committing. This is a session-workflow preference only — it does not apply to
+CI, which should keep running the full script on every push/PR regardless of
+diff size; that's the point of it.

 ## Architecture

@@ -254,11 +91,9 @@ nixosSystem {
 ```

 Platforms: `linode`, `proxmox`, `lxc`. Build types: `minimal`, `nix-cache`,
-`server`, `docker`, `gui`, `pxe-boot`, `tailscale-exit-node`, `tor-relay`. Not
-every combination is built — e.g. `pxe-boot` has no `linode` variant
-(PXE/DHCP/TFTP need LAN L2 adjacency a Linode VPS doesn't have), and
-`tor-relay` currently only exists as `lxc-tor-relay`. Treat `flake.nix`'s
-`generatedTargets` as the source
+`server`, `docker`, `gui`, `pxe-boot`. Not every combination is built — e.g.
+`pxe-boot` has no `linode` variant (PXE/DHCP/TFTP need LAN L2 adjacency a
+Linode VPS doesn't have). Treat `flake.nix`'s `generatedTargets` as the source
 of truth for which hosts exist — `README.md`, `AGENTS.md`,
 `docs/flake-lock-automation.md`, and the CI eval workflows
 (`.github/workflows/check-nixos.yml`, `.gitea/workflows/check-nixos.yml`) list
@@ -280,12 +115,10 @@ removing a host.
  from `flake.nix`. `lxc.nix` has no hardware-configuration counterpart since
  containers share the host kernel; instead it imports nixpkgs' own
  `virtualisation/proxmox-lxc.nix`, which gives every `lxc-*` host a
-  `config.system.build.tarball` output — a plain rootfs tarball, used as a
-  `pct create ... vztmpl` CT template (**not** `pct restore`, which expects
-  `vzdump` backup-archive metadata this doesn't have), no install step —
-  see `docs/auto-installer.md`.
+  `config.system.build.tarball` output (`pct restore`-ready, no install step
+  — see `docs/auto-installer.md`).
 - `modules/build-types/*.nix` — what a system is for:
-  minimal/server/docker/gui/pxe-boot/nix-cache/tailscale-exit-node/tor-relay.
+  minimal/server/docker/gui/pxe-boot/nix-cache.
 - `modules/common/configuration.nix` — base NixOS config imported by every
  host: locale, users, nix settings, git.
 - `modules/common/home.nix` / `hosts/nixos/home.nix` — Home Manager config for
@@ -296,17 +129,11 @@ removing a host.
  `lxc-*`). Also carries `imageSize`/`imageName`, letting every `proxmox-*`
  host be built as a standalone, `qm importdisk`-ready `.raw` image with no
  install step — see `docs/proxmox-images.md`.
- `modules/disko/linode.nix` — `linode-*`'s disko config, deliberately
-  different in kind from the Proxmox one: Linode provisions and sizes
-  `/dev/sda`/`/dev/sdb` itself as whole, unpartitioned devices before the OS
-  boots, so this declares them with `destroy = false` (disko never wipes
-  them) and a bare `filesystem`/`swap` content type instead of a partition
-  table — idempotent against an already-provisioned disk, never destructive.
 - `modules/boot/efi.nix` — systemd-boot + EFI vars, paired with the disko module.
- `modules/installer/` — the auto-installer environment (ISO, also served as
-  PXE netboot): `common.nix` (shared config + the generated
-  `auto-install.sh`), `iso.nix`, `host-keys.nix` (optionally bakes
-  `host-keys/` into the image under `--impure`). See
+- `modules/installer/` — the auto-installer environment (ISO/netboot/Proxmox
+  LXC): `common.nix` (shared config + the generated `auto-install.sh`),
+  `iso.nix`/`proxmox-lxc.nix` (per-variant), `host-keys.nix` (optionally
+  bakes `host-keys/` into the image under `--impure`). See
  `docs/auto-installer.md`.
 - `modules/pxe-boot/stage-installer-artifacts.nix` — builds the installer's
  netboot image and stages it on the `pxe-boot` host so its iPXE menu can
@@ -320,8 +147,7 @@ removing a host.
  and `environmentFile`; used by `hosts/server/host.nix` and
  `hosts/nix-cache/host.nix` to avoid duplicating that boilerplate.
 - `modules/tailscale/`, `modules/docker/`, `modules/networking/`,
-  `modules/traefik/`, `modules/tor/`, `modules/services/*` — single-purpose,
-  single-host
+  `modules/traefik/`, `modules/services/*` — single-purpose, single-host
  feature modules (e.g. `docker/enable-service.nix`,
  `services/zfs/enable-service.nix`). Grep `modules/build-types/*.nix` for
  each build type's `imports` list to see which modules apply where.
@@ -10,32 +10,22 @@ pieces composed in `flake.nix`:

 - **Platforms** (what it runs on): `linode`, `proxmox`, `lxc`
 - **Build types** (what it's for): `minimal`, `nix-cache`, `server`, `docker`,
-  `gui`, `pxe-boot`, `tailscale-exit-node`, `tor-relay`
+  `gui`, `pxe-boot`

 Not every combination exists — `pxe-boot` has no `linode` variant, since
-PXE/DHCP/TFTP need LAN L2 adjacency that a Linode VPS doesn't have, and
-`tor-relay` currently only exists as `lxc-tor-relay`. The full list:
+PXE/DHCP/TFTP need LAN L2 adjacency that a Linode VPS doesn't have. The full
+list:

 | Target | Purpose |
 | --- | --- |
-| `linode-minimal` | Minimal NixOS host profile on a Linode VPS |
-| `proxmox-minimal` | Minimal NixOS host profile on Proxmox — previously the flat `nix-minimal` target |
+| `linode-minimal` | Minimal NixOS host profile on a Linode VPS (real, deployed) |
+| `proxmox-minimal` | Minimal NixOS host profile on Proxmox (real, deployed — previously the flat `nix-minimal` target) |
 | `lxc-minimal` | Minimal NixOS host profile in a Proxmox LXC container |
-| `linode-nix-cache` / `proxmox-nix-cache` / `lxc-nix-cache` | Local Nix binary cache and remote builder — previously the flat `nix-cache` target |
-| `linode-server` / `proxmox-server` / `lxc-server` | Storage, NFS, backup, and monitoring exporter host — previously the flat `server` target |
-| `linode-docker` / `proxmox-docker` / `lxc-docker` | Docker host for the main container stack — previously the flat `docker` target |
-| `linode-gui` / `proxmox-gui` / `lxc-gui` | Cinnamon desktop workstation — previously the flat `nixos` target |
-| `proxmox-pxe-boot` / `lxc-pxe-boot` | HTTP/iPXE boot asset host — previously the flat `pxe-boot` target |
-| `linode-tailscale-exit-node` / `proxmox-tailscale-exit-node` / `lxc-tailscale-exit-node` | Tailscale exit node |
-| `lxc-tor-relay` | Tor middle relay |
-
-Which variant of a given buildtype is actually deployed isn't tracked
-anywhere in this repo — that's live infrastructure state, not something a
-committed file can keep accurate, and it changes independently of the code.
-Check the Proxmox node itself, or `/etc/flake-target` on a running host (see
-below), if you need to know what's really out there right now.
-`scripts/proxmox/create-proxmox-resource.sh`'s duplicate-host guard works the same
-way: it checks the Proxmox node directly rather than any file here.
+| `linode-nix-cache` / `proxmox-nix-cache` / `lxc-nix-cache` | Local Nix binary cache and remote builder (`proxmox-nix-cache` is the real, deployed one — previously the flat `nix-cache` target) |
+| `linode-server` / `proxmox-server` / `lxc-server` | Storage, NFS, backup, and monitoring exporter host (`proxmox-server` is the real, deployed one — previously the flat `server` target) |
+| `linode-docker` / `proxmox-docker` / `lxc-docker` | Docker host for the main container stack (`proxmox-docker` is the real, deployed one — previously the flat `docker` target) |
+| `linode-gui` / `proxmox-gui` / `lxc-gui` | Cinnamon desktop workstation (`proxmox-gui` is the real, deployed one — previously the flat `nixos` target) |
+| `proxmox-pxe-boot` / `lxc-pxe-boot` | HTTP/iPXE boot asset host (`proxmox-pxe-boot` is the real, deployed one — previously the flat `pxe-boot` target) |

 Each buildtype's `hosts/<name>/host.nix` carries the per-machine identity
 (hostname, hostId, per-machine secrets, `system.stateVersion`) that must stay
@@ -56,17 +46,17 @@ nix eval --json .#nixosConfigurations --apply builtins.attrNames | jq -r '.[]'
 | Path | Purpose |
 | --- | --- |
 | `flake.nix` | Flake inputs, the `mkTarget` platform × build-type generator, and `nixosConfigurations` outputs |
-| `variables.nix` | Single source of truth for shared values (LAN domain/CIDR, hostnames, timezone, primary username, storage root, NFS share subpaths/mountpoints, service ports, ...) — passed to every module and Home Manager config as the `vars` argument via `specialArgs`/`extraSpecialArgs` |
+| `variables.nix` | Single source of truth for shared values (LAN domain/CIDR, hostnames, timezone, primary username, storage root, ...) — passed to every module and Home Manager config as the `vars` argument via `specialArgs`/`extraSpecialArgs` |
 | `hosts/<name>/host.nix` | Per-machine identity: hostname, hostId, per-machine secrets, `system.stateVersion` |
 | `hosts/nixos/home.nix` | Workstation-specific Home Manager config (used by the `gui` build type) |
 | `modules/platforms/` | Platform-specific config: virtualisation guest tools, boot method, hardware config (`linode.nix`, `proxmox.nix`, `lxc.nix`) |
 | `modules/build-types/` | Build-type-specific config: what makes a system minimal/server/docker/gui/pxe-boot/nix-cache |
 | `modules/common/` | Shared NixOS config, Home Manager, aliases imported by every host |
 | `modules/nix-cache/` | Binary cache and remote builder client/server modules |
-| `modules/installer/` | Auto-installer environment (ISO, also served as PXE netboot) — see `docs/auto-installer.md` |
+| `modules/installer/` | Auto-installer environment (ISO/netboot/Proxmox LXC) — see `docs/auto-installer.md` |
 | `host-keys/` | Gitignored, locally-generated SSH host keys for the auto-installer — see `docs/auto-installer.md` |
 | `docs/` | Operational notes for cache, builders, lock updates, boot services, the auto-installer, and Proxmox image builds |
-| `scripts/` | Codex setup, validation, host-key, release-bump, and Proxmox resource helpers |
+| `scripts/` | Codex setup, validation, and host-key-prep helpers |

 ## Validation

@@ -74,19 +64,10 @@ Safe validation commands for Codex and local review:

 ```bash
 bash scripts/codex-setup.sh
+bash scripts/codex-maintenance.sh dry-run
 bash scripts/codex-maintenance.sh
 ```

-`codex-maintenance.sh` with no flags (what CI runs on every push/PR) scopes
-fmt-check/statix/eval to files changed against a base ref — fast, but only
-as thorough as the diff. For the full sweep (every host, every package,
-fmt-check and statix over the whole tree — slow, CI never runs this):
-
-```bash
-bash scripts/codex-maintenance.sh --full-check
-bash scripts/codex-maintenance.sh --full-check --dry-run
-```
-
 For individual host evaluation:

 ```bash
@@ -112,23 +93,14 @@ Three different paths depending on target, none of them involving a manual
 `nixos-rebuild switch` from this repo:

 - Most hosts: boot the auto-installer, pick the target from its menu — see
-  `docs/auto-installer.md`. Every menu target has a Disko config the
-  installer formats unconditionally (`docs/auto-installer.md`'s "Storage"
-  section covers how this stays non-destructive for `linode-*`, whose disks
-  Linode itself provisions ahead of time).
+  `docs/auto-installer.md`.
 - `lxc-*` targets: not installed at all — build a ready-to-run container
-  tarball and `pct create` it as a CT template directly. `docs/auto-installer.md`
-  covers why (and the installer's menu excludes them for the same reason).
+  tarball and `pct restore` it directly. `docs/auto-installer.md` covers why
+  (and the installer's menu excludes them for the same reason).
 - `proxmox-*` targets: can alternatively be built as a standalone `.raw`
  disk image and attached to a new VM with no install step — see
  `docs/proxmox-images.md`.

-`scripts/proxmox/create-proxmox-resource.sh --type lxc|vm --host <name>` automates
-either of the last two end to end (host-key registration, building the
-image directly on the Proxmox node itself, `pct create`/`qm create`), with
-`--dry-run` and a guard against duplicating an already-deployed host's
-identity. See its `--help`.
-
 ## Security Notes

 Do not commit tokens, private keys, live credentials, or new password hashes
@@ -5,9 +5,8 @@ install any host exposed by its own `nixosConfigurations`. It was migrated
 from a formerly-separate `nix-auto-installer` repo — everything it did now
 lives here.

-The installer provides a small NixOS install environment (ISO, or the same
-image netbooted via PXE) with SSH access, Git support, and an interactive
-installation script.
+The installer provides a small NixOS install environment (ISO/netboot/Proxmox
+LXC) with SSH access, Git support, and an interactive installation script.
 Logging in as any user (root or `nixos`) runs `/etc/auto-install.sh`,
 discovers available hosts from this same flake, lets the operator choose a
 target, applies that host's Disko storage configuration, installs NixOS, and
@@ -19,7 +18,7 @@ see "LXC hosts" immediately below for why those are different.**
 ## LXC hosts

 `lxc-*` targets (`lxc-minimal`, `lxc-nix-cache`, `lxc-server`, `lxc-docker`,
-`lxc-gui`, `lxc-pxe-boot`, `lxc-tailscale-exit-node`, `lxc-tor-relay`) are **not** installed via `auto-install.sh` — the
+`lxc-gui`, `lxc-pxe-boot`) are **not** installed via `auto-install.sh` — the
 interactive menu deliberately excludes them. Don't try to select one there;
 `nixos-install` would bind-mount `/` onto `/mnt` (LXC containers have no raw
 disk to partition) and then refuse to touch the filesystem it's currently
@@ -34,76 +33,16 @@ container image, no install step at all:
 nix build .#nixosConfigurations.lxc-minimal.config.system.build.tarball
 ```

-This is a plain rootfs tarball, not a `vzdump` backup archive — restoring it
-with `pct restore` fails ("archive contains no configuration file"), since
-that command expects backup-archive metadata this tarball doesn't have. Use
-it as a CT *template* instead: drop it under Proxmox's template storage
-(conventionally `/var/lib/vz/template/cache/` for the `local` storage, or
-the GUI's "Create CT" → upload-as-template flow) and create a container
-from it, supplying all config on the command line since a template has none
-of its own:
+Then, on the Proxmox host, `pct restore` (or the GUI's "Create CT" → upload
+template flow) that tarball directly as a new container. First boot runs
+`boot.postBootCommands` (registers the Nix store DB and system profile) —
+there's no separate activation step to run yourself.

-```sh
-pct create <vmid> local:vztmpl/<file>.tar.xz \
-  --unprivileged 1 --features nesting=1,keyctl=1 \
-  --rootfs local-lvm:8 --hostname <name> --cores 2 --memory 2048 --swap 2048 \
-  --net0 name=eth0,bridge=vmbr0,ip=dhcp
-pct start <vmid>
-```
-
-Every one of those extra flags is load-bearing, confirmed by actually
-booting one:
-
- `--unprivileged 1` — `modules/platforms/lxc.nix` sets
-  `proxmoxLXC.privileged = false`, so the image assumes it's running
-  unprivileged. `pct create`'s own CLI default for this flag is
-  privileged (unlike the web UI, whose checkbox defaults the other way)
-  — omit it and you get a privileged container running a NixOS config
-  that assumes unprivileged, a real mismatch.
- `--features nesting=1,keyctl=1` — required for a modern (v247+)
-  systemd guest to boot unprivileged at all. Without it, AppArmor denies
-  the nested user namespaces and credential mounts systemd routinely
-  uses (even plain getty units) — every getty crash-loops on a denied
-  `/run/credentials/*` mount every ~3s (this is what garbage on the
-  console turns out to be) while core services like `nsncd` fail the
-  same way, and the system never finishes activating.
- `--swap 2048` — `--memory` doesn't touch swap; it silently stays at
-  Proxmox's own 512M default otherwise. Match it to `--memory` unless
-  you deliberately want otherwise.
-
-First boot runs `boot.postBootCommands` (registers the Nix store DB and
-system profile) — there's no separate activation step to run yourself.
-`scripts/proxmox/create-proxmox-resource.sh --type lxc --host <name>` automates all
-of this (host-key handling, building the tarball directly on the Proxmox
-node itself, `pct create` with the flags above) — see its `--help`.
-
-Host keys still need pre-seeding the same way as any other host — the
-sops-nix activation-vs-first-boot race is identical regardless of how the
-image reaches the machine. Unlike the ISO/PXE installer (where
-`modules/installer/host-keys.nix` bakes *every* `host-keys/` entry into
-`/etc/host-keys/` for `auto-install.sh` to pick from and copy at install
-time — see "Host keys" below), an `lxc-*` tarball has no install step to
-copy anything during, so `modules/platforms/lxc.nix` bakes this *one*
-target's key straight into `/etc/ssh/ssh_host_ed25519_key(.pub)` directly,
-keyed by its own exact flake target name (`config.environment.etc` can't
-be read back from within a module still contributing to it, so this comes
-in via `specialArgs.flakeTarget`, set by `flake.nix`'s `mkTarget`):
-
-```sh
-NIXOS_HOST_KEYS_DIR="$(pwd)/host-keys" \
-  nix build .#nixosConfigurations.lxc-nix-cache.config.system.build.tarball --impure
-```
-
-Confirmed the hard way: without this, the tarball's own built-in system
-just generates a fresh host key at first boot like any host would, which
-can never match whatever `.sops.yaml` actually trusts for that target —
-`sops-install-secrets` fails with `Error getting data key: 0 successful
-groups required, got 0`, and *every* secret (including this host's own
-login) permanently fails to decrypt, silently — no error in the boot log
-at all, since the activation step that would install secrets only runs on
-a from-scratch first activation and skips silently once `/run/current-system`
-already exists. `scripts/proxmox/create-proxmox-resource.sh` always builds with
-`NIXOS_HOST_KEYS_DIR` set for this reason.
+Host keys still need pre-seeding the same way as any other host (see "Host
+keys" below) — the sops-nix activation-vs-first-boot race is identical
+regardless of how the image reaches the machine. `NIXOS_HOST_KEYS_DIR=...
+nix build ... --impure` bakes the matching key into the tarball the same way
+it does for the ISO/PXE installer images.

 ## Layout

@@ -114,40 +53,32 @@ already exists. `scripts/proxmox/create-proxmox-resource.sh` always builds with
  `installation-cd-minimal.nix` module plus `common.nix`. Also used, paired
  with `netboot-minimal.nix`, to build the PXE netboot variant (see
  `docs/pxe-boot.md`).
+- `modules/installer/proxmox-lxc.nix` — Proxmox LXC-specific: disables
+  bootloader options (containers don't need one) plus `common.nix`.
 - `modules/installer/host-keys.nix` — optionally bakes pre-generated SSH
  host keys into the image; see "Host keys" below.
- `scripts/secrets/sync-host-keys.sh` — admin-workstation tool that generates,
-  registers, and (via `--remove`/`--regenerate-all-keys`) retires host
-  keys; see "Creating a New Machine" below.
- `scripts/secrets/prepare-host-key.sh` — narrower predecessor: generates a single
-  key by an arbitrary name without touching `.sops.yaml`. Still useful for
-  pre-generating a key *before* its flake target exists (`sync-host-keys.sh`
-  can only act on targets `nixosConfigurations` already has); otherwise
-  `sync-host-keys.sh` does the same thing and more.
+- `scripts/prepare-host-key.sh` — admin-workstation pre-flight tool, see
+  "Creating a New Machine" below.

 Flake outputs:

 ```nix
-nixosConfigurations.installer   # ISO/netboot installer image
+nixosConfigurations.installer     # ISO/netboot installer image
+nixosConfigurations.proxmox-lxc   # Proxmox LXC-based installer image

 packages.x86_64-linux.iso   # installer ISO/netboot image
+packages.x86_64-linux.lxc   # Proxmox LXC installer tarball
 packages.x86_64-linux.pxe   # netboot-ipxe + netboot-initrd + netboot-kernel, bundled
+packages.x86_64-linux.all   # all three of the above, bundled
 ```

 ```sh
 nix build .#iso
+nix build .#lxc
 nix build .#pxe
+nix build .#all
 ```

-There's no `nixosConfigurations.proxmox-lxc` (installer-boots-as-an-LXC-
-container) or `packages.x86_64-linux.lxc`/`.all` anymore. Both existed only
-to let the installer itself run as an LXC container so you could
-`nixos-install` some *other* host from within it — but LXC targets are
-excluded from the install menu (same bind-mount problem as any LXC
-`nixos-install`), and now have their own direct tarball path anyway (see
-"LXC hosts" above), which left the installer's own LXC form with no real
-use case.
-
 The `pxe` variant is also built automatically as part of the `pxe-boot` host
 itself (`modules/pxe-boot/stage-installer-artifacts.nix`) and served over
 iPXE — see `docs/pxe-boot.md`.
@@ -192,24 +123,10 @@ next, where you can `scp` a key in after boot, same as before this migration.
 ## Storage

 Disk partitioning is handled by Disko — the installer has no hardcoded
-`parted`/`mkfs`/`mkswap`/`mount` commands, and `auto-install.sh` runs
-`disko --mode destroy,format,mount` unconditionally, no branching on whether
-the target has a Disko config. Every host reachable through this menu has
-one:
-
- `proxmox-*` (`modules/disko/proxmox.nix`): a real GPT partition table
-  (ESP + swap + root) on `/dev/sda`.
- `linode-*` (`modules/disko/linode.nix`): Linode provisions and sizes
-  `/dev/sda`/`/dev/sdb` itself as whole, unpartitioned block devices before
-  the OS ever boots, so this declares them with `destroy = false` (skips
-  disko's wipe stage for these disks entirely — see the option's own docs)
-  and a bare `filesystem`/`swap` content type with no partition table, and
-  the format step it does run only calls `mkfs`/`mkswap` if `blkid` shows
-  the device isn't already formatted — a re-run against an
-  already-provisioned Linode disk is a no-op, not a wipe.
-
-`lxc-*` is the only category without one — it's excluded from this menu
-entirely (see "LXC hosts" above), so it never reaches this code path.
+`parted`/`mkfs`/`mkswap`/`mount` commands. Each host defines its own layout
+via `disko.devices`; a host without one is installed in place via bind-mount
+(this is how every LXC container target works, since they have no raw block
+device to partition).

 ## Installer process

@@ -218,7 +135,7 @@ entirely (see "LXC hosts" above), so it never reaches this code path.
 1. Queries `nixosConfigurations` from this flake over the network (`git+https://<lanDomain>/beatzaplenty/nixos.git`) — this happens at *install* time, not build time, so a generic installer image always sees whatever hosts are currently committed, without needing a rebuild.
 2. Presents them as a menu; confirms the choice.
 3. Skips the `nix-cache` substituter when installing a `nix-cache` host itself (consistent with that host's own runtime config).
-4. Runs `disko --mode destroy,format,mount` (see "Storage" above — every host reachable through this menu has a Disko config, so this is unconditional).
+4. Runs `disko --mode destroy,format,mount` if the target has a Disko config, otherwise bind-mounts `/` onto `/mnt`.
 5. Installs the target's SSH host key from `/etc/host-keys` or `/root/host-keys` (see "Host keys" above).
 6. Runs `nixos-install --flake <url>#<choice> --no-root-password`.
 7. Cleans up and reboots.
@@ -230,28 +147,24 @@ host consumes any sops-nix secret — as of this writing, that's every host
 (`modules/common/configuration.nix` puts the root/nixos password hash and the
 GitHub token behind sops-nix for all of them).

-1. **Add the flake target** — `hosts/<name>/host.nix` plus the matching
-   `mkTarget { ... }` entry in `flake.nix`'s `generatedTargets` (see
-   "Composition pattern" in `CLAUDE.md`). No secrets involved yet, so this
-   is safe to commit on its own if you want a clean history.
-
-2. **On your admin workstation, generate and register its host key:**
+1. **On your admin workstation**, decide the new machine's flake target name
+   (`<platform>-<buildtype>`, e.g. `proxmox-server`) and generate + register
+   its host key:

   ```sh
-   ./scripts/secrets/sync-host-keys.sh <flake-target>
+   ./scripts/prepare-host-key.sh <hostname>
   ```

-   This generates `host-keys/<flake-target>_ssh_host_ed25519_key(.pub)`,
-   adds it as a new `.sops.yaml` anchor, works out which `secrets/*.yaml`
-   files this specific host actually references (from its own
-   `config.sops.secrets`, not guessed), adds it to each one's
-   `key_groups`, and re-encrypts them with `sops updatekeys` — no manual
-   YAML editing. Safe to re-run; it only fills in what's missing.
+   This generates `host-keys/<hostname>_ssh_host_ed25519_key(.pub)` and
+   prints the `.sops.yaml` snippet to add, which secrets files to
+   re-encrypt it into, and the next steps below.

-   Doing this for every host that needs one at once — after adding several
-   new targets, or just to catch up any that were missed — is
-   `./scripts/secrets/sync-host-keys.sh --all`. See `scripts/secrets/sync-host-keys.sh --help`
-   for its other modes (`--remove`, `--regenerate-all-keys`).
+2. **Edit `.sops.yaml`** with the printed snippet, then re-encrypt every
+   secrets file you added the new host to:
+
+   ```sh
+   nix-shell -p sops --run 'sops updatekeys secrets/common.yaml'
+   ```

 3. **Commit and push.** The flake build the installer uses has to see the
   new recipient before you install, or decryption fails on first boot
@@ -8,14 +8,9 @@ and to verify that declared NixOS hosts still evaluate after dependency updates.
 - A scheduled workflow runs `nix flake update` once per week.
 - On GitHub, any resulting `flake.lock` change is proposed through a pull request.
 - On Gitea, the workflow can commit and push `flake.lock` directly when PR automation is not configured.
- A separate CI workflow runs `scripts/codex-maintenance.sh` before merge.
-  Its default mode scopes eval to the hosts/packages a change can affect,
-  determined from a git diff against the PR base — but a `flake.lock` change
-  is treated as repo-wide and always falls back to evaluating every host, so
-  a lock-file update PR still gets full coverage. Hosts are still listed
-  dynamically via
-  `nix eval --json .#nixosConfigurations --apply builtins.attrNames` rather
-  than hand-enumerated, so that fallback can't drift as `<platform>-<buildtype>`
+- A separate CI workflow evaluates every configured host before merge, listed
+  dynamically via `nix eval --json .#nixosConfigurations --apply builtins.attrNames`
+  rather than hand-enumerated, so it can't drift as `<platform>-<buildtype>`
  targets are added or removed. See `README.md` for the current target list.

 ## Why hosts should stop using `--upgrade-all`
@@ -11,70 +11,34 @@ This repository configures `nix-cache` as a **binary cache server** and a **remo
 - Client hosts import `modules/nix-cache/client.nix` and, when remote building is enabled, `modules/nix-cache/remote-builder-client.nix`.
 - The `nix-cache` host imports `modules/nix-cache/server.nix`.

-## Binary cache signing key
-
-`modules/nix-cache/client.nix` hardcodes every client's trust in one
-specific public key (`cache.local-1:usoWYanY3Kpq2+kDIS2nhWoLZiRxanmdysdzqCFBHW4=`).
-That means whichever host is currently playing the `nix-cache` role has to
-use that *exact* keypair — not a freshly generated one — or no client will
-accept substitutes from it (they'd just silently fall back to building
-from source). So unlike most per-host secrets, this one can't be
-self-generated on first boot; it's managed via sops-nix like every other
-secret in this repo, sourced from `secrets/nix-cache.yaml`'s
-`cache-priv-key` entry (`modules/nix-cache/server.nix`).
-
-**Adding or rotating the value:**
+## Binary cache signing keys (on nix-cache)

 ```bash
-nix-shell -p sops --run 'sops secrets/nix-cache.yaml'
+sudo install -d -m 0700 /etc/nix
+sudo nix-store --generate-binary-cache-key nix-cache-1   /etc/nix/cache-priv.pem   /etc/nix/cache-pub.pem
+sudo chmod 0600 /etc/nix/cache-priv.pem
+sudo chmod 0644 /etc/nix/cache-pub.pem
+cat /etc/nix/cache-pub.pem
 ```

-Add (or replace) a `cache-priv-key` entry with the private key file's exact
-contents. If you don't have it yet, generate a keypair once:
-
-```bash
-nix-store --generate-binary-cache-key nix-cache-1 cache-priv.pem cache-pub.pem
-```
-
-— paste `cache-priv.pem`'s contents into the `cache-priv-key` entry above,
-delete both local files afterward, and update
-`trusted-public-keys` in `modules/nix-cache/client.nix` (and every already-built
-client) to match `cache-pub.pem` if this is a genuine rotation rather than
-a first-time bootstrap. Any `nixos-configurations.*-nix-cache` host picks
-the new key up automatically on next activation — no more manual
-`/etc/nix/cache-priv.pem` install step.
+Do not commit private keys.
+Do not commit new password hashes or live credentials. Existing committed hashes
+should be rotated and moved to host-local secret management.

 ## Remote builder SSH keys

-Each client authenticates as `nixremote` using its **own default root SSH
-identity** (`/root/.ssh/id_ed25519`) — not a separately-named or shared
-keypair. If a client doesn't have one yet:
+On each client, install the private key used to authenticate as `nixremote`:

 ```bash
-sudo ssh-keygen -t ed25519 -N '' -f /root/.ssh/id_ed25519
+sudo install -d -m 0700 /root/.ssh
+sudo install -m 0600 ./nixremote /root/.ssh/nixremote
+sudo ssh -i /root/.ssh/nixremote nixremote@nix-cache nix-store --version
 ```

-Then add its `.pub` contents as a new entry in `vars.remoteBuilderAuthorizedKeys`
-(`variables.nix`) and rebuild `nix-cache` to pick it up (that list is
-declarative — an imperative `ssh-copy-id nixremote@nix-cache` won't stick;
-it gets overwritten on every rebuild). Verify with:
+On `nix-cache`, install the matching public key used by `nixremote` authorized keys.

-```bash
-sudo ssh -i /root/.ssh/id_ed25519 nixremote@nix-cache nix-store --version
-```
-
-The committed `remoteBuilderAuthorizedKeys` entries are public SSH keys
-only. Keep the matching private keys on client hosts and out of the
-repository.
-
-nix-cache's own SSH *host* key is trusted declaratively via
-`programs.ssh.knownHosts` in `modules/nix-cache/remote-builder-client.nix`,
-sourced from `vars.nixCacheHostKey` (`variables.nix`) — every client rebuild
-picks it up automatically, so distributed builds don't fail with "Host key
-verification failed" on a client that has never manually SSH'd to nix-cache
-before. If nix-cache's host key is ever rotated or the host rebuilt from
-scratch, update `vars.nixCacheHostKey` to match its new
-`/etc/ssh/ssh_host_ed25519_key.pub`.
+The committed `nixremote` authorized keys are public SSH keys only. Keep the
+matching private keys on client hosts and out of the repository.

 ## Manual verification

@@ -84,8 +48,8 @@ After deployment:
 curl http://nix-cache/nix-cache-info
 nix store ping --store http://nix-cache
 nix show-config | grep -E 'substituters|trusted-public-keys|builders-use-substitutes'
-sudo ssh -i /root/.ssh/id_ed25519 nixremote@nix-cache nix-store --version
-nix build nixpkgs#hello --builders 'ssh://nixremote@nix-cache x86_64-linux /root/.ssh/id_ed25519 4 2 big-parallel,kvm,nixos-test,benchmark' -L
+sudo ssh -i /root/.ssh/nixremote nixremote@nix-cache nix-store --version
+nix build nixpkgs#hello --builders 'ssh://nixremote@nix-cache x86_64-linux /root/.ssh/nixremote 4 2 big-parallel,kvm,nixos-test,benchmark' -L
 nix path-info -r nixpkgs#hello
 curl -I "http://nix-cache/$(basename "$(nix path-info nixpkgs#hello)").narinfo"
 ```
@@ -7,14 +7,6 @@ config (`modules/disko/proxmox.nix`) already used to format a real disk on
 install, so there's nothing host-specific to write; it's available for every
 `proxmox-*` target automatically.

-`scripts/proxmox/create-proxmox-resource.sh --type vm --host <name>` automates the
-whole walkthrough below (and the equivalent LXC one) end to end, including
-host-key handling and building the image directly on the Proxmox node
-itself (no local build, no image transfer) — see its `--help`. The steps
-here are what it runs under the hood, useful for doing any of it by hand
-or understanding what it does before you trust it against real
-infrastructure.
-
 ## Building

 ```sh
@@ -51,10 +43,9 @@ sudo ./result \
  --build-memory 2048
 ```

-Generate the key first with `scripts/secrets/sync-host-keys.sh <hostname>`, same
-as any other host — see `docs/auto-installer.md` for the full walkthrough
-(it registers the new key in `.sops.yaml` and re-encrypts the affected
-`secrets/*.yaml` files too, no manual editing needed).
+Generate the key first with `scripts/prepare-host-key.sh <hostname>`, same
+as any other host — see `docs/auto-installer.md` for the full sops.yaml
+registration walkthrough.

 ## Deploying to Proxmox

@@ -0,0 +1,143 @@
+# Spec: Refactor Flake Targets into Platform × Build-Type Matrix
+
+## Context
+
+The flake at `~/nixos` currently defines these output targets (flat, ad-hoc naming):
+
+- `docker`
+- `linode-minimal`
+- `nix-cache`
+- `nix-minimal`
+- `nixos`
+- `server`
+- `pxe-boot`
+
+Some already follow a `platform-buildtype` convention (`linode-minimal`), most don't.
+`~/nix-auto-installer` is a related repo and should be checked for any coupling to
+these target names (scripts, docs, CI, or install automation that reference them by
+name) before renaming anything.
+
+## Goal
+
+Restructure the flake so targets are generated from two orthogonal concepts:
+
+**Build types** (what the system is for):
+- `minimal`
+- `nix-cache`
+- `server`
+- `docker`
+- `pxe-boot`
+- `gui`
+
+**Platforms** (what it's deployed on):
+- `linode` (Linode VM)
+- `proxmox` (Proxmox VM)
+- `lxc` (Proxmox LXC container)
+
+Final targets should be named consistently as `<platform>-<buildtype>`, e.g.:
+
+```
+linode-minimal    proxmox-minimal    lxc-minimal
+linode-nix-cache  proxmox-nix-cache  lxc-nix-cache
+linode-server     proxmox-server     lxc-server
+linode-docker     proxmox-docker     lxc-docker
+linode-pxe-boot   proxmox-pxe-boot   lxc-pxe-boot
+linode-gui        proxmox-gui        lxc-gui
+```
+
+That's the full matrix (18 targets) if every build type applies to every platform.
+See **Open Questions** below — some combinations may not make sense and should be
+confirmed with me before being built out, not silently included or dropped.
+
+## Migration mapping (old → new)
+
+| Old target        | New target                                          | Notes |
+|--------------------|------------------------------------------------------|-------|
+| `linode-minimal`   | `linode-minimal`                                      | Already correct, keep as-is |
+| `nix-minimal`      | likely `proxmox-minimal` or a platform-less base module | Ambiguous — see Open Questions |
+| `nix-cache`        | base module consumed by `linode-nix-cache`, `proxmox-nix-cache`, `lxc-nix-cache` | Currently platform-less; needs to become a build-type module, not a standalone target |
+| `server`           | base module consumed by `linode-server`, `proxmox-server`, `lxc-server` | Same as above |
+| `docker`           | base module consumed by `linode-docker`, `proxmox-docker`, `lxc-docker` | Confirm docker actually makes sense as an LXC/VM guest build vs. a standalone container image — see Open Questions |
+| `pxe-boot`         | TBD — may stay a single target rather than a per-platform one | See Open Questions |
+| `nixos`            | TBD — unclear what this maps to in the new scheme | See Open Questions |
+
+## Open Questions (Claude Code: raise these with me before implementing, don't guess)
+
+1. **`nixos` target** — what is this currently used for (bare metal install, dev
+   shell, template)? It doesn't obviously map to any of the six build types.
+2. **`nix-minimal` vs `linode-minimal`** — are these two different things, or is
+   `nix-minimal` a leftover/duplicate?
+3. **`pxe-boot` and `gui` across all three platforms** — does PXE boot make sense
+   for an LXC container or a cloud VM (Linode), or is it inherently bare-metal/
+   network-boot only and should remain a single non-platform target? Does `gui`
+   make sense inside an LXC container?
+4. **`docker` as a build type** — is this "a NixOS host configured to run Docker"
+   (which would sensibly have linode/proxmox/lxc variants), or "a Docker container
+   image built by the flake" (which wouldn't take a platform prefix at all, since
+   it doesn't run on Linode/Proxmox/LXC as a guest OS)? These are structurally
+   different and change how it should be wired in.
+5. Confirm whether all 18 combinations should actually exist, or whether this is
+   meant to produce only the combinations that are genuinely useful (e.g. maybe no
+   one needs `lxc-pxe-boot`).
+
+## Implementation approach
+
+1. **Inventory first.** Read the current `flake.nix` and any `nixosConfigurations`/
+   `modules` structure. Map every existing target to what module(s) it actually
+   pulls in. Don't assume — confirm against the real file contents.
+2. **Separate build-type and platform into their own module directories**, e.g.:
+   ```
+   modules/build-types/minimal.nix
+   modules/build-types/nix-cache.nix
+   modules/build-types/server.nix
+   modules/build-types/docker.nix
+   modules/build-types/pxe-boot.nix
+   modules/build-types/gui.nix
+
+   modules/platforms/linode.nix
+   modules/platforms/proxmox.nix
+   modules/platforms/lxc.nix
+   ```
+   Build-type modules should contain only what makes a system "minimal" vs
+   "server" vs "gui", etc. Platform modules should contain only what's specific
+   to running as a Linode VM vs Proxmox VM vs LXC container (virtualisation
+   guest tools, boot method, filesystem/image format, LXC-specific constraints
+   like no kernel modules, etc).
+3. **Generate the target matrix programmatically** in `flake.nix` rather than
+   hand-writing 18 near-identical `nixosConfigurations` entries — e.g. a small
+   function that takes a platform name and build-type name, composes the two
+   modules plus any shared base module, and produces the named output. This
+   keeps future build types/platforms a one-line addition rather than a copy-paste
+   job.
+4. **Only build combinations we've confirmed make sense** (see Open Questions) —
+   don't emit all 18 by default if some are structurally invalid.
+5. **Preserve existing working configs during the transition.** Don't delete the
+   old target names until their replacements build successfully — rename/alias
+   at the end, not the start, so there's no window where the flake is broken.
+
+## Verification
+
+For every new target produced:
+```bash
+nix flake check
+nix build .#nixosConfigurations.<target>.config.system.build.toplevel
+```
+Confirm each builds without evaluation errors before considering it done. If a
+target fails to build, report which one and why rather than silently skipping it.
+
+## Deliverables
+
+- Refactored `flake.nix` using the composed module + generated-matrix approach.
+- New `modules/build-types/*.nix` and `modules/platforms/*.nix` files.
+- Old flat target names removed only after their replacements are verified.
+- A short `README.md` (or section in existing docs) listing the final target
+  names and what each one is for.
+- A summary at the end of what changed, what was removed, and any of the Open
+  Questions above that got resolved differently than expected.
+
+## Out of scope
+
+- Don't touch `~/nix-auto-installer` contents beyond checking it for references
+  to the old target names — if changes there are needed, flag them, don't make
+  them without confirming.
+- Don't add new build types or platforms beyond the ones listed here.
@@ -33,9 +33,6 @@
      # nix-cache itself consumes the nix-cache substituter and remote
      # builder.
      mkTarget = { platform, buildType, hostPath, homeFile ? ./modules/common/home.nix }:
-        let
-          flakeTarget = "${platform}-${buildType}";
-        in
        nixpkgs.lib.nixosSystem {
          inherit system;
          modules = [
@@ -45,7 +42,7 @@
            ./modules/platforms/${platform}.nix
            ./modules/build-types/${buildType}.nix
            hostPath
-            { environment.etc."flake-target".text = flakeTarget; }
+            { environment.etc."flake-target".text = "${platform}-${buildType}"; }
            home-manager.nixosModules.home-manager
            {
              home-manager = {
@@ -59,13 +56,7 @@
            ./modules/nix-cache/client.nix
            ./modules/nix-cache/remote-builder-client.nix
          ];
-          # flakeTarget is passed via specialArgs (not read back from
-          # config.environment.etc."flake-target" above) specifically so
-          # modules/platforms/lxc.nix can use it to select its own host key
-          # file without a same-option circular dependency (a module
-          # contributing to environment.etc can't read the merged
-          # environment.etc it's itself contributing to).
-          specialArgs = { inherit inputs vars netbootSystem flakeTarget; };
+          specialArgs = { inherit inputs vars netbootSystem; };
        };

      # Generated platform x build-type matrix. pxe-boot has no linode
@@ -94,12 +85,6 @@

        proxmox-pxe-boot = mkTarget { platform = "proxmox"; buildType = "pxe-boot"; hostPath = ./hosts/pxe-boot/host.nix; };
        lxc-pxe-boot = mkTarget { platform = "lxc"; buildType = "pxe-boot"; hostPath = ./hosts/pxe-boot/host.nix; };
-
-        linode-tailscale-exit-node = mkTarget { platform = "linode"; buildType = "tailscale-exit-node"; hostPath = ./hosts/tailscale-exit-node/host.nix; };
-        proxmox-tailscale-exit-node = mkTarget { platform = "proxmox"; buildType = "tailscale-exit-node"; hostPath = ./hosts/tailscale-exit-node/host.nix; };
-        lxc-tailscale-exit-node = mkTarget { platform = "lxc"; buildType = "tailscale-exit-node"; hostPath = ./hosts/tailscale-exit-node/host.nix; };
-
-        lxc-tor-relay = mkTarget { platform = "lxc"; buildType = "tor-relay"; hostPath = ./hosts/tor-relay/host.nix; };
      };

      # Auto-install environments (migrated from the former nix-auto-installer
@@ -115,6 +100,12 @@
          modules = [ ./modules/installer/iso.nix ];
          specialArgs = { inherit vars; };
        };
+
+        proxmox-lxc = nixpkgs.lib.nixosSystem {
+          inherit system;
+          modules = [ ./modules/installer/proxmox-lxc.nix ];
+          specialArgs = { inherit vars; };
+        };
      };

      # Same installer environment, built as netboot (kernel + initrd +
@@ -137,22 +128,24 @@

      nixosConfigurations = generatedTargets // installerTargets;

-      # Buildable auto-installer artifacts (`nix build .#<name>`). No `lxc`
-      # variant (installer-boots-as-an-LXC-container) or `all` bundle
-      # anymore — lxc-* and proxmox-* hosts deploy via their own tarball/
-      # disk-image outputs instead (see docs/auto-installer.md and
-      # docs/proxmox-images.md), which left the installer's own LXC form
-      # with no real use case: it's excluded from the install menu (same
-      # bind-mount problem as any LXC nixos-install target) and nothing
-      # else needed booting the installer itself as a container.
-      packages.${system} = {
+      # Buildable auto-installer artifacts (`nix build .#<name>`), migrated
+      # unchanged from nix-auto-installer's interface.
+      packages.${system} = rec {
        iso = installerTargets.installer.config.system.build.isoImage;

+        lxc = installerTargets.proxmox-lxc.config.system.build.tarball;
+
        pxe = pkgs.linkFarm "pxe" [
          { name = "netboot.ipxe"; path = netbootSystem.config.system.build.netbootIpxeScript; }
          { name = "initrd"; path = netbootSystem.config.system.build.netbootRamdisk; }
          { name = "kernel"; path = netbootSystem.config.system.build.kernel; }
        ];
+
+        all = pkgs.linkFarm "all" [
+          { name = "iso"; path = iso; }
+          { name = "lxc"; path = lxc; }
+          { name = "pxe"; path = pxe; }
+        ];
      };
    };
 }
@@ -31,7 +31,7 @@
        [Desktop Entry]
        Type=Application
        Name=Proxmox (Chromium)
-        Exec=chromium --app=https://pve.${vars.homeDomain}:${toString vars.ports.pveWeb} --window-size=1920,1080 --window-position=0,0
+        Exec=chromium --app=https://pve.${vars.homeDomain}:${toString vars.pveWebPort} --window-size=1920,1080 --window-position=0,0
        Icon=${config.home.homeDirectory}/.local/share/icons/proxmox.png
        Terminal=false
        Categories=Hypervisor;
@@ -41,7 +41,7 @@
        [Desktop Entry]
        Type=Application
        Name=Proxmox Backup Server (Chromium)
-        Exec=chromium --app=https://${vars.pbsIp}:${toString vars.ports.pbsWeb} --window-size=1920,1080 --window-position=0,0
+        Exec=chromium --app=https://${vars.pbsIp}:${toString vars.pbsWebPort} --window-size=1920,1080 --window-position=0,0
        Icon=${config.home.homeDirectory}/.local/share/icons/proxmox.png
        Terminal=false
        Categories=backup;
@@ -51,7 +51,7 @@
        [Desktop Entry]
        Type=Application
        Name=Proxmox (Firefox)
-        Exec=firefox --new-instance https://pve.${vars.homeDomain}:${toString vars.ports.pveWeb} --profile ProxmoxWebApp --window-size=1920,1080 --class ProxmoxWebApp
+        Exec=firefox --new-instance https://pve.${vars.homeDomain}:${toString vars.pveWebPort} --profile ProxmoxWebApp --window-size=1920,1080 --class ProxmoxWebApp
        Icon=${config.home.homeDirectory}/.local/share/icons/proxmox.png
        Terminal=false
        Categories=Hypervisor;
@@ -61,7 +61,7 @@
        [Desktop Entry]
        Type=Application
        Name=Proxmox Backup Server (Firefox)
-        Exec=firefox --new-window https://${vars.pbsIp}:${toString vars.ports.pbsWeb} --profile PbsWebApp --window-size=1920,1080 --class PbsWebApp
+        Exec=firefox --new-window https://${vars.pbsIp}:${toString vars.pbsWebPort} --profile PbsWebApp --window-size=1920,1080 --class PbsWebApp
        Icon=${config.home.homeDirectory}/.local/share/icons/proxmox.png
        Terminal=false
        Categories=backup;
@@ -14,7 +14,7 @@
  services.beszel.agent.environment = {
    #DOCKER_HOST = "tcp://docker-socket-proxy:2375";
    KEY = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFPR9kwtC4TAeTRu46A7+opZsYpxqkRJ+x/ZyB2GWCeG";
-    EXTRA_FILESYSTEMS = "${vars.storageRoot}/${vars.nfsShares.dockerVolumes.subpath}";
+    EXTRA_FILESYSTEMS = "${vars.storageRoot}/docker/volumes";
    LOG_LEVEL = "debug";
  };

@@ -1,12 +0,0 @@
-_:
-
-{
-  networking.hostName = "exit-node";
-
-  # No networking.hostId: only ZFS-touching hosts (server, docker) need one
-  # for pool-import safety, and this host does neither.
-
-  # A genuinely new host (not a pre-refactor carry-over), so it tracks the
-  # flake's current nixpkgs release rather than being pinned to an older one.
-  system.stateVersion = "26.05";
-}
@@ -1,12 +0,0 @@
-_:
-
-{
-  networking.hostName = "tor-relay";
-
-  # No networking.hostId: only ZFS-touching hosts (server, docker) need one
-  # for pool-import safety, and this host does neither.
-
-  # A genuinely new host (not a pre-refactor carry-over), so it tracks the
-  # flake's current nixpkgs release rather than being pinned to an older one.
-  system.stateVersion = "26.05";
-}
@@ -4,15 +4,6 @@
  services.beszel.agent.enable = true;
  services.beszel.agent.environment = {
    #DOCKER_HOST = "tcp://docker-socket-proxy:2375";
-    HUB_URL = "http://${vars.dockerHost}.${vars.homeDomain}:${toString vars.ports.beszelHub}";
+    HUB_URL = "http://${vars.dockerHost}.${vars.homeDomain}:${toString vars.beszelHubPort}";
  };
-
-  # The upstream module runs beszel-agent under DynamicUser with
-  # ProtectSystem = "strict" and no StateDirectory, so /var/lib/beszel-agent
-  # (where the agent persists its hub-pairing fingerprint, per
-  # https://github.com/henrygd/beszel/discussions/1542) isn't writable --
-  # every restart silently fails to save it and regenerates a fresh one in
-  # memory, permanently desyncing from whatever the hub has on record after
-  # the very first successful pairing. Give it real persistent storage.
-  systemd.services.beszel-agent.serviceConfig.StateDirectory = "beszel-agent";
 }
@@ -28,18 +28,13 @@
  boot.supportedFilesystems = [ "nfs" ];

  systemd.tmpfiles.rules = [
-    "L+ /home/${vars.primaryUser}/docker - - - - ${vars.nfsShares.dockerConfig.mountpoint}"
-    "d /mnt/docker 0755 ${vars.primaryUser} users -"
-    "d ${vars.nfsShares.raspiVolumes.mountpoint} 0755 ${vars.primaryUser} users -"
+    "L+ /home/nixos/docker - - - - /mnt/docker/config"
+    "d /mnt/docker 0755 nixos users -"
+    "d /mnt/raspi-backup 0755 nixos users -"
  ];

-  users.users.${vars.primaryUser}.extraGroups = [ "docker" ];
+  users.users.nixos.extraGroups = [ "docker" ];
  services.openssh.settings.PermitRootLogin = "yes";

-  networking.firewall.allowedTCPPorts = [
-    vars.ports.dockerHttp
-    vars.ports.dockerExtra
-    vars.ports.dockerHttps
-    vars.ports.beszelHub
-  ];
+  networking.firewall.allowedTCPPorts = [ 80 8080 443 vars.beszelHubPort ];
 }
@@ -1,4 +1,4 @@
-{ config, pkgs, lib, inputs, vars, ... }:
+{ config, pkgs, lib, inputs, ... }:

 {
  environment.systemPackages = with pkgs; [
@@ -65,7 +65,7 @@
  # The networkmanager group only exists when NM is actually enabled — the
  # lxc platform module force-disables it, so don't add the user to a group
  # that won't exist there.
-  users.users.${vars.primaryUser}.extraGroups = lib.mkIf config.networking.networkmanager.enable [ "networkmanager" ];
+  users.users.nixos.extraGroups = lib.mkIf config.networking.networkmanager.enable [ "networkmanager" ];

  programs.firefox.enable = true;

@@ -1,4 +1,4 @@
-{ lib, pkgs, config, vars, ... }:
+{ lib, pkgs, config, ... }:

 {
  networking.networkmanager.enable = true;
@@ -6,7 +6,7 @@
  # The networkmanager group only exists when NM is actually enabled — the
  # lxc platform module force-disables it, so don't add the user to a group
  # that won't exist there.
-  users.users.${vars.primaryUser}.extraGroups = lib.mkIf config.networking.networkmanager.enable [ "networkmanager" ];
+  users.users.nixos.extraGroups = lib.mkIf config.networking.networkmanager.enable [ "networkmanager" ];

  environment.systemPackages = with pkgs; [
    inetutils
@@ -155,6 +155,6 @@ in
    };
  };

-  networking.firewall.allowedTCPPorts = [ vars.ports.pxeBootHttp ];
-  networking.firewall.allowedUDPPorts = [ vars.ports.pxeBootTftp ];
+  networking.firewall.allowedTCPPorts = [ 80 ];
+  networking.firewall.allowedUDPPorts = [ 69 ];
 }
@@ -16,13 +16,13 @@
  services.nfs.server = {
    enable = true;
    exports = ''
-      ${vars.storageRoot}/${vars.nfsShares.dockerConfig.subpath} ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
-      ${vars.storageRoot}/${vars.nfsShares.dockerVolumes.subpath} ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
-      ${vars.storageRoot}/${vars.nfsShares.dockerDatabases.subpath} ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
-      ${vars.storageRoot}/${vars.nfsShares.nextcloudData.subpath} ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
-      ${vars.storageRoot}/${vars.nfsShares.raspiVolumes.subpath} ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
+      ${vars.storageRoot}/docker/config ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
+      ${vars.storageRoot}/docker/volumes ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
+      ${vars.storageRoot}/docker/databases ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
+      ${vars.storageRoot}/docker/nextcloud-data ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
+      ${vars.storageRoot}/raspi/volumes ${vars.lanCidr}(rw,sync,no_subtree_check,no_root_squash)
    '';
  };

-  networking.firewall.allowedTCPPorts = [ vars.ports.nfsRpcbind vars.ports.nfsd ];
+  networking.firewall.allowedTCPPorts = [ 111 2049 ];
 }
@@ -1,21 +0,0 @@
-{ ... }:
-
-{
-  imports = [
-    ../tailscale/exit-node.nix
-  ];
-
-  # "server", not "both": this build type only ever advertises itself as an
-  # exit node (see ../tailscale/exit-node.nix) -- it doesn't advertise LAN
-  # subnet routes, so it doesn't need the "client"-side loose reverse-path
-  # filtering that "both" would also turn on. Deliberately left unbundled
-  # from LAN-subnet-route advertisement so this build type stays valid on
-  # every platform, including linode (a remote VPS with no network path to
-  # the home LAN at all).
-  services.tailscale.useRoutingFeatures = "server";
-
-  # Forwarded exit-node traffic arrives on tailscale0 already
-  # tailscale-authenticated -- the firewall's normal per-port allow-list
-  # would otherwise drop it. Standard NixOS/Tailscale exit-node guidance.
-  networking.firewall.trustedInterfaces = [ "tailscale0" ];
-}
@@ -1,7 +0,0 @@
-{ ... }:
-
-{
-  imports = [
-    ../tor/enable-relay.nix
-  ];
-}
@@ -17,26 +17,6 @@ let
      --refresh \
      --flake git+https://${vars.lanDomain}/beatzaplenty/nixos.git#$(cat /etc/flake-target)
  '';
-
-  # lxc-* hosts pre-seed their SSH host key at build time (see
-  # modules/platforms/lxc.nix) so sops-nix's .sops.yaml recipient matches on
-  # first boot -- without it, secrets permanently fail to decrypt (see that
-  # file's comment for the confirmed failure). That requires --impure plus
-  # NIXOS_HOST_KEYS_DIR pointing at the repo's host-keys/ dir, same pattern
-  # docs/auto-installer.md uses for the installer ISO. A function, not a
-  # shellAlias, since the target name has to interpolate into the middle of
-  # the flake attribute path, not just append after it. Must be run from the
-  # repo root, same as every other host-keys/ command in this repo.
-  buildImageFn = ''
-    buildImage() {
-      if [ -z "$1" ]; then
-        echo "usage: buildImage <flake-target>  (e.g. lxc-docker)" >&2
-        return 1
-      fi
-      NIXOS_HOST_KEYS_DIR="$(pwd)/host-keys" nix build --impure \
-        ".#nixosConfigurations.$1.config.system.build.tarball"
-    }
-  '';
 in
 {
  programs.bash = {
@@ -45,6 +25,5 @@ in
      "Switch-nix" = mySwitchCmd;
      "Test-nix" = myTestCmd;
    };
-    initExtra = buildImageFn;
  };
 }
@@ -13,24 +13,6 @@

  networking.networkmanager.enable = true; # Easiest to use and most distros use this by default.

-  # No host declares a DNS search domain anywhere else, and cross-host
-  # references throughout this repo (vars.nfsServerHost, vars.nixCacheHost,
-  # vars.dockerHost, ...) are bare short names, not FQDNs -- resolving them
-  # depends entirely on whatever network stack happens to be in play
-  # picking up the DHCP-advertised domain as a search suffix. NetworkManager
-  # does that by default, which is why this went unnoticed on
-  # NetworkManager-managed hosts, but LXC containers (modules/platforms/lxc.nix
-  # force-disables NetworkManager and Proxmox writes their systemd-networkd
-  # config itself) never get one. Confirmed live on lxc-docker: systemd-resolved
-  # had no search domain for eth0, "server" failed to resolve
-  # ("Name or service not known") while "server.sweet.home" resolved fine via
-  # the same DNS server, so every NFS mount in modules/docker/mount-data.nix
-  # failed even after fixing the automount/mount=nfs bugs. This applies the
-  # search domain globally via systemd-resolved's own config rather than the
-  # per-link DHCP path, so it isn't at the mercy of whichever component owns
-  # a given host's interface file.
-  networking.search = [ vars.homeDomain ];
-
  # Recommended over the true default (bypasses ZFS's own import safeguards)
  # per the option's own docs; matches hosts/docker/host.nix and
  # modules/services/zfs/enable-service.nix, which already set this
@@ -1,35 +0,0 @@
-_:
-
-{
-  # Linode provisions and sizes these disks itself (via the Linode
-  # dashboard/API) before the OS ever boots, and presents them as whole,
-  # unpartitioned block devices — /dev/sda is the root filesystem directly,
-  # /dev/sdb is swap directly, no partition table on either. Nothing here
-  # should ever repartition or resize them:
-  #   - `destroy = false` skips each disk entirely during disko's destroy
-  #     stage (see disko's disk.destroy option) — no wipefs, ever.
-  #   - the filesystem content type's own create step only runs mkfs if the
-  #     device isn't already formatted (checked via `blkid`), so re-running
-  #     this against an already-provisioned Linode disk is a no-op.
-  disko.devices.disk = {
-    main = {
-      device = "/dev/sda";
-      destroy = false;
-
-      content = {
-        type = "filesystem";
-        format = "ext4";
-        mountpoint = "/";
-      };
-    };
-
-    swap = {
-      device = "/dev/sdb";
-      destroy = false;
-
-      content = {
-        type = "swap";
-      };
-    };
-  };
-}
@@ -1,4 +1,4 @@
-{ config, vars, ... }:
+{ config, ... }:

 {
  disko.devices = {
@@ -13,7 +13,7 @@
      # whatever's left after ESP + swap within it); imageName keeps each
      # host's image distinctly named instead of every proxmox-* host
      # producing an identical "main.raw".
-      imageSize = vars.proxmoxImageSize;
+      imageSize = "20G";
      imageName = config.networking.hostName;

      content = {
@@ -1,70 +1,65 @@
 { config, lib, pkgs, vars, ... }:

-let
-  # `x-systemd.automount` never works inside a Linux container (LXC
-  # included, regardless of privilege) -- confirmed live on lxc-docker:
-  # systemd logs "Starting of <unit>.automount unsupported" for every
-  # share and never mounts them. Mount eagerly there instead, with
-  # `nofail` so a boot with the NFS server unreachable doesn't hang
-  # (the VM platforms rely on automount itself to get that same
-  # non-blocking behavior, so they don't need `nofail` too).
-  automountOpts = if config.boot.isContainer then [ "nofail" ] else [ "x-systemd.automount" ];
-in
 {
  fileSystems = {
-    ${vars.nfsShares.dockerConfig.mountpoint} = {
-      device = "${vars.nfsServerHost}:${vars.storageRoot}/${vars.nfsShares.dockerConfig.subpath}";
+    "/mnt/docker/config" = {
+      device = "${vars.nfsServerHost}:${vars.storageRoot}/docker/config";
      fsType = "nfs";

      options = [
        "nfsvers=4.2"
        "_netdev"
+        "x-systemd.automount"
        "noatime"
-      ] ++ automountOpts;
+      ];
    };

-    ${vars.nfsShares.dockerDatabases.mountpoint} = {
-      device = "${vars.nfsServerHost}:${vars.storageRoot}/${vars.nfsShares.dockerDatabases.subpath}";
+    "/mnt/docker/databases" = {
+      device = "${vars.nfsServerHost}:${vars.storageRoot}/docker/databases";
      fsType = "nfs";

      options = [
        "nfsvers=4.2"
        "_netdev"
+        "x-systemd.automount"
        "noatime"
-      ] ++ automountOpts;
+      ];
    };

-    ${vars.nfsShares.dockerVolumes.mountpoint} = {
-      device = "${vars.nfsServerHost}:${vars.storageRoot}/${vars.nfsShares.dockerVolumes.subpath}";
+    "/mnt/docker/volumes" = {
+      device = "${vars.nfsServerHost}:${vars.storageRoot}/docker/volumes";
      fsType = "nfs";

      options = [
        "nfsvers=4.2"
        "_netdev"
+        "x-systemd.automount"
        "noatime"
-      ] ++ automountOpts;
+      ];
    };

-    ${vars.nfsShares.nextcloudData.mountpoint} = {
-      device = "${vars.nfsServerHost}:${vars.storageRoot}/${vars.nfsShares.nextcloudData.subpath}";
+    "/mnt/nextcloud-data" = {
+      device = "${vars.nfsServerHost}:${vars.storageRoot}/docker/nextcloud-data";
      fsType = "nfs";

      options = [
        "nfsvers=4.2"
        "_netdev"
+        "x-systemd.automount"
        "noatime"
-      ] ++ automountOpts;
+      ];
    };

-    ${vars.nfsShares.raspiVolumes.mountpoint} = {
-      device = "${vars.nfsServerHost}:${vars.storageRoot}/${vars.nfsShares.raspiVolumes.subpath}";
+    "/mnt/raspi-backup" = {
+      device = "${vars.nfsServerHost}:${vars.storageRoot}/raspi/volumes";
      fsType = "nfs";

      options = [
        "nfsvers=4.2"
        "_netdev"
+        "x-systemd.automount"
        "noatime"
-      ] ++ automountOpts;
+      ];
    };
  };
 }
@@ -33,11 +33,14 @@
    };
  };

-  # fileSystems."/" and swapDevices are now owned by disko
-  # (../disko/linode.nix, imported from ../platforms/linode.nix) — same
-  # /dev/sda root + /dev/sdb swap layout, declared there instead so disko's
-  # (idempotent, non-destructive — see that file) format/mount scripts stay
-  # in sync with what NixOS actually mounts.
+  fileSystems."/" =
+    {
+      device = "/dev/sda";
+      fsType = "ext4";
+    };
+
+  swapDevices =
+    [{ device = "/dev/sdb"; }];

  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
 }
@@ -57,23 +57,25 @@

        echo "Fetching available NixOS hosts from flake..."
        # Two categories deliberately excluded from the menu:
-        #   lxc-*     — these build a config.system.build.tarball meant for
-        #               `pct restore` on Proxmox directly, not an install.
-        #               Running nixos-install against one here would
-        #               bind-mount / onto /mnt and then refuse to touch the
-        #               filesystem it's currently running on — see
-        #               docs/auto-installer.md.
-        #   installer — this *is* the installer image's own flake target,
-        #               not a deployable host; "installing" it means
-        #               nixos-install-ing a copy of the installer into
-        #               itself.
+        #   lxc-*                 — these build a config.system.build.tarball
+        #                           meant for `pct restore` on Proxmox
+        #                           directly, not an install. Running
+        #                           nixos-install against one here would
+        #                           bind-mount / onto /mnt and then refuse to
+        #                           touch the filesystem it's currently
+        #                           running on — see docs/auto-installer.md.
+        #   installer/proxmox-lxc — these *are* the installer image's own
+        #                           flake targets, not deployable hosts;
+        #                           "installing" one means nixos-install-ing
+        #                           a copy of the installer into itself.
        mapfile -t options < <(
          nix eval --json --no-use-registries --no-accept-flake-config --extra-experimental-features "flakes nix-command" \
            "''${FLAKE_BASE_URL}#nixosConfigurations" \
            --apply builtins.attrNames \
          | jq -r '.[]
              | select(startswith("lxc-") | not)
-              | select(. != "installer")'
+              | select(. != "installer")
+              | select(. != "proxmox-lxc")'
        )

        if [[ ''${#options[@]} -eq 0 ]]; then
@@ -119,18 +121,27 @@
            nix_extra_opts+=(--option substituters "https://cache.nixos.org/")
        fi

-        # Every host reachable through this menu has a Disko config (lxc-*
-        # is filtered out above, and is the only category that doesn't —
-        # see docs/auto-installer.md), so this can run unconditionally: no
-        # need to probe the flake first and branch on whether Disko applies.
-        disko --mode destroy,format,mount \
-            --flake "''${FLAKE_BASE_URL}#''${choice}" "''${nix_extra_opts[@]}" --yes-wipe-all-disks
+        if nix eval --refresh --json  --extra-experimental-features "flakes nix-command" "''${nix_extra_opts[@]}" "''${FLAKE_BASE_URL}#nixosConfigurations.''${choice}.config.disko.devices.disk.main.device" >/dev/null 2>&1; then
+            disko --mode destroy,format,mount \
+                --flake "''${FLAKE_BASE_URL}#''${choice}" "''${nix_extra_opts[@]}" --yes-wipe-all-disks
+        else
+            # No raw disk to partition — true for every LXC container, which has
+            # no block device visible from inside it, only its already-mounted
+            # root filesystem. nixos-install defaults to installing into /mnt; if
+            # nothing points /mnt at the real root, the new system gets built and
+            # written to a disconnected empty directory, never actually becomes
+            # bootable, and the container silently keeps running this installer
+            # environment forever. Bind-mount / onto /mnt so the install actually
+            # lands on the filesystem this container boots from.
+            echo "Selected host has no Disko configuration — installing in place via bind mount."
+            mount --bind / /mnt
+        fi

        # sops-nix derives this host's decryption key from its own SSH host key
        # at *activation* time, which runs before systemd would otherwise
        # generate one on first boot. Without pre-seeding it here, secrets
        # (including the login password) fail to decrypt on first boot.
-        # Generate the key with scripts/secrets/prepare-host-key.sh first.
+        # Generate the key with scripts/prepare-host-key.sh first.
        #
        # Two places a key can come from, checked in order:
        #   /etc/host-keys  — baked into this image at build time (see
@@ -150,7 +161,7 @@
        else
            echo "WARNING: no SSH host key found for ''${choice} (checked /etc/host-keys and /root/host-keys)"
            echo "sops-nix secrets (including the login password) will NOT decrypt on first boot."
-            echo "Run scripts/secrets/prepare-host-key.sh for host ''${choice} on your admin workstation first,"
+            echo "Run scripts/prepare-host-key.sh for host ''${choice} on your admin workstation first,"
            echo "then either rebuild this image with NIXOS_HOST_KEYS_DIR set, or scp the result to"
            echo "/root/host-keys/ on this machine."
            read -rp "Continue without a pre-seeded key anyway? (y/N): " skip_key
@@ -0,0 +1,12 @@
+{ modulesPath, ... }:
+
+{
+  imports = [
+    ./common.nix
+    (modulesPath + "/virtualisation/proxmox-lxc.nix")
+  ];
+
+  # LXC has no bootloader
+  boot.loader.grub.enable = false;
+  boot.loader.systemd-boot.enable = false;
+}
@@ -1,22 +1,10 @@
 { pkgs, vars, ... }:

 {
-  # Authenticate as nixremote using the client host's own default root SSH
-  # identity (/root/.ssh/id_ed25519) rather than a separately-named key --
-  # matches vars.remoteBuilderAuthorizedKeys, which already authorizes
-  # each host's own default key (one entry per host, not a shared
-  # dedicated keypair). If this host doesn't have one yet:
-  #   sudo -u root ssh-keygen -t ed25519 -N '' -f /root/.ssh/id_ed25519
-  #   # then add its .pub to vars.remoteBuilderAuthorizedKeys and rebuild nix-cache
-  #   sudo ssh -i /root/.ssh/id_ed25519 nixremote@nix-cache nix-store --version
-  # Trust nix-cache's SSH host key declaratively so the nix-daemon (root)
-  # can connect the first time without a manual ssh-keyscan/known_hosts
-  # step on every new client.
-  programs.ssh.knownHosts.${vars.nixCacheHost} = {
-    hostNames = [ vars.nixCacheHost ];
-    publicKey = vars.nixCacheHostKey;
-  };
-
+  # Install the remote builder key on each client host (do not commit private keys):
+  #   sudo install -d -m 0700 /root/.ssh
+  #   sudo install -m 0600 ./nixremote /root/.ssh/nixremote
+  #   sudo ssh -i /root/.ssh/nixremote nixremote@nix-cache nix-store --version
  nix = {
    distributedBuilds = true;

@@ -24,7 +12,7 @@
      {
        hostName = vars.nixCacheHost;
        sshUser = vars.remoteBuilderUser;
-        sshKey = "/root/.ssh/id_ed25519";
+        sshKey = "/root/.ssh/${vars.remoteBuilderUser}";
        inherit (pkgs.stdenv.hostPlatform) system;
        maxJobs = 4;
        speedFactor = 2;
@@ -1,20 +1,18 @@
 { config, pkgs, vars, ... }:

 {
-  # nix-serve's signing key has to be the *same* key on every host that
-  # ever plays the nix-cache role -- modules/nix-cache/client.nix hardcodes
-  # every client's trust in one specific public key ("cache.local-1:..."),
-  # so a freshly self-generated key here wouldn't be trusted by anyone.
-  # Managed via sops-nix like every other secret in this repo instead of
-  # the old manual `nix-store --generate-binary-cache-key` step -- see
-  # "Binary cache signing key" in docs/nix-cache.md for how to add/rotate
-  # the value in secrets/nix-cache.yaml.
-  sops.secrets."cache-priv-key".sopsFile = ../../secrets/nix-cache.yaml;
-
+  # Generate the binary cache key pair on the nix-cache host:
+  #   sudo install -d -m 0700 /etc/nix
+  #   sudo nix-store --generate-binary-cache-key nix-cache-1 \
+  #     /etc/nix/cache-priv.pem \
+  #     /etc/nix/cache-pub.pem
+  #   sudo chmod 0600 /etc/nix/cache-priv.pem
+  #   sudo chmod 0644 /etc/nix/cache-pub.pem
+  #   cat /etc/nix/cache-pub.pem
  services = {
    nix-serve = {
      enable = true;
-      secretKeyFile = config.sops.secrets."cache-priv-key".path;
+      secretKeyFile = "/etc/nix/cache-priv.pem";
    };

    nginx = {
@@ -30,7 +28,7 @@
    openssh.enable = true;
  };

-  networking.firewall.allowedTCPPorts = [ vars.ports.nixCacheHttp ];
+  networking.firewall.allowedTCPPorts = [ 80 ];

  users.groups.${vars.remoteBuilderUser} = { };

@@ -56,6 +54,6 @@
  nix.gc = {
    automatic = true;
    dates = "weekly";
-    options = "--delete-older-than ${vars.nixCacheGcMaxAge}";
+    options = "--delete-older-than 30d";
  };
 }
@@ -3,7 +3,6 @@
 {
  imports = [
    ../hardware-configuration/vm/linode.nix
-    ../disko/linode.nix
  ];

  networking = {
@@ -1,44 +1,5 @@
-{ lib, modulesPath, flakeTarget, ... }:
+{ lib, modulesPath, ... }:

-let
-  # Bakes this exact flake target's pre-generated SSH host key straight
-  # into /etc/ssh/ -- mirrors modules/installer/host-keys.nix's
-  # builtins.getEnv pattern (impure and empty under normal `nix
-  # build`/`nix eval`, so this is a no-op unless explicitly opted into
-  # with NIXOS_HOST_KEYS_DIR=... --impure), but places the key directly
-  # rather than staging it under /etc/host-keys/ for a later manual copy
-  # -- this is the whole system for a `lxc-*` host, built straight to a
-  # pct-restorable tarball with no install step, so there's no later copy
-  # step to stage for.
-  #
-  # Without this, config.system.build.tarball's built-in system just
-  # generates a fresh host key at first boot like any other host would --
-  # but sops-nix derives its decryption key from *this* file, and
-  # .sops.yaml only trusts whatever key scripts/secrets/sync-host-keys.sh already
-  # registered for this exact target name. A freshly-generated key can
-  # never match that, so every secret (including this host's own login)
-  # permanently fails to decrypt. Confirmed live: sops-install-secrets
-  # errored with "Error getting data key: 0 successful groups required,
-  # got 0" -- the container's actual host key's age fingerprint didn't
-  # match the one registered in .sops.yaml at all.
-  hostKeysDirStr = builtins.getEnv "NIXOS_HOST_KEYS_DIR";
-  hasHostKeysDir = hostKeysDirStr != "" && builtins.pathExists hostKeysDirStr;
-  hostKeysDir = /. + hostKeysDirStr;
-
-  # flakeTarget ("${platform}-${buildType}") comes in via specialArgs from
-  # flake.nix's mkTarget -- exactly the name scripts/secrets/sync-host-keys.sh
-  # registers keys under. Deliberately not read back from
-  # config.environment.etc."flake-target" (which is set to the same value)
-  # -- this module also *contributes* to environment.etc below, and a
-  # module reading the merged value of an option it's still defining is a
-  # circular dependency (confirmed: "infinite recursion encountered").
-  privKeyFile = hostKeysDir + "/${flakeTarget}_ssh_host_ed25519_key";
-  pubKeyFile = hostKeysDir + "/${flakeTarget}_ssh_host_ed25519_key.pub";
-  hasKeyForThisTarget =
-    hasHostKeysDir
-    && builtins.pathExists privKeyFile
-    && builtins.pathExists pubKeyFile;
-in
 {
  # LXC containers share the host kernel — Proxmox starts them by exec'ing
  # /sbin/init directly, no bootloader/initrd involved — and Proxmox has its
@@ -74,75 +35,4 @@ in
  # for the same reason; it just doesn't disable NetworkManager itself,
  # which modules/common/configuration.nix enables for every host.
  networking.networkmanager.enable = lib.mkForce false;
-
-  environment.etc = lib.mkIf hasKeyForThisTarget {
-    "ssh/ssh_host_ed25519_key" = {
-      source = privKeyFile;
-      mode = "0600";
-    };
-    "ssh/ssh_host_ed25519_key.pub" = {
-      source = pubKeyFile;
-      mode = "0644";
-    };
-  };
-
-  # virtualisation/proxmox-lxc.nix (imported above) registers the Nix
-  # store DB via a systemd service (register-nix-paths) -- it never runs
-  # an activation script at all. Confirmed live this means neither
-  # sops-nix's "for users" secrets (password hashes -- installed by the
-  # activation script itself, not a systemd service, since they need to
-  # exist *before* user creation) nor the user-creation step that
-  # consumes them ever run on a real lxc-* boot. Regular secrets
-  # (nix-serve's key, beszel's token, etc.) work anyway because sops-nix
-  # provides its own systemd service for those.
-  #
-  # A systemd service, not boot.postBootCommands: tried that first (it's
-  # a genuine, generally-invoked hook -- nixos/modules/system/boot/stage-2-init.sh,
-  # which becomes this container's actual /sbin/init, unconditionally
-  # runs it) but switch-to-configuration behaves differently that early in
-  # boot (raw stage-2-init.sh, before systemd itself has even started) --
-  # confirmed live it silently failed to rewrite /etc/shadow from there
-  # even in "test" mode, despite the exact same command working reliably
-  # every time when run post-boot (i.e. as a normal systemd service, which
-  # is what this is). Not fully root-caused why the early context
-  # specifically breaks it; a real systemd service sidesteps needing to.
-  #
-  # /etc/shadow already has PLACEHOLDER entries for every declared user
-  # baked in at build time (part of constructing the system closure).
-  # update-users-groups.pl deliberately never overwrites an *existing*
-  # shadow entry -- a correct safety property in general (don't clobber a
-  # real user's real password on a config rebuild) -- but on a genuine
-  # first boot that only means the real hashedPasswordFile-derived hash
-  # never gets the chance to be applied either, since the placeholder is
-  # already "seen". Safe to clear here specifically: there is no real
-  # password yet to protect on a first boot.
-  #
-  # "test" mode, not "boot": confirmed live "boot" mode aborts partway
-  # through (before rewriting /etc/shadow) on a warning that "/boot" is on
-  # a different filesystem -- a real check for a host with a bootloader to
-  # update, meaningless for a container that has none
-  # (boot.loader.{grub,systemd-boot}.enable are both false above), but it
-  # still aborts the script. "test" runs every activation step without
-  # touching boot-loader state at all.
-  #
-  # ConditionPathExists (systemd-native, not a bash-level check) means
-  # this only ever runs once, on the genuine first boot -- systemd itself
-  # skips even starting it on every later boot once the marker exists.
-  # switch-to-configuration is otherwise the operator's call per this
-  # repo's own safety rules, not something to run on every boot.
-  systemd.services.nixos-lxc-first-boot-activate = {
-    description = "Complete first-boot NixOS activation (users, secrets) for this LXC container";
-    wantedBy = [ "multi-user.target" ];
-    unitConfig.ConditionPathExists = "!/var/lib/nixos-lxc-first-boot-activated";
-    serviceConfig = {
-      Type = "oneshot";
-      RemainAfterExit = true;
-    };
-    script = ''
-      rm -f /etc/shadow
-      /run/current-system/bin/switch-to-configuration test
-      mkdir -p /var/lib
-      touch /var/lib/nixos-lxc-first-boot-activated
-    '';
-  };
 }
@@ -1,23 +1,14 @@
-{ config, lib, vars, ... }:
+{ vars, ... }:

 {
-  fileSystems.${vars.raspiMountpoint} = {
-    device = "${vars.raspberryPiHost}.${vars.tailnetDomain}:${vars.raspiNfsPath}";
+  fileSystems."/mnt/raspi" = {
+    device = "raspberrypi.${vars.tailnetDomain}:/home/raspi/raspi";
    fsType = "nfs4";
    options = [
      "nofail"
      "_netdev"
      "noatime"

-      # Explicitly use NFSv4.2 if supported
-      "nfsvers=4.2"
-    ] ++ lib.optionals (!config.boot.isContainer) [
-      # `x-systemd.automount` never works inside a Linux container (LXC
-      # included) -- confirmed live on lxc-docker: systemd logs "Starting
-      # of <unit>.automount unsupported" and never mounts it. `nofail`
-      # above already keeps boot non-blocking there, so plain eager
-      # mounting is fine.
-
      # Don't mount until first access
      "x-systemd.automount"

@@ -26,6 +17,9 @@

      # Give the Pi/Tailscale a little time to appear
      "x-systemd.device-timeout=10s"
+
+      # Explicitly use NFSv4.2 if supported
+      "nfsvers=4.2"
    ];
  };

@@ -1,27 +1,12 @@
-_:
+{ vars, ... }:

 {
-  imports = [ ./enable-service.nix ];
-
  services.tailscale = {
-    # Enables the sysctl forwarding settings exit nodes/subnet routers need;
-    # without this, --advertise-exit-node has no effect.
-    useRoutingFeatures = "server";
+    enable = true;

-    # Lets peers reach this node directly over the tailscale UDP port
-    # instead of relaying through DERP.
-    openFirewall = true;
-
-    # extraSetFlags (tailscale set, via the always-on tailscaled-set
-    # service), not extraUpFlags -- extraUpFlags is only ever applied by
-    # tailscaled-autoconnect, which itself only runs when
-    # services.tailscale.authKeyFile is set (nothing in this repo sets one,
-    # so tailscale up is a manual, one-time operator step on every host that
-    # uses this service). extraSetFlags has no such gate, so
-    # --advertise-exit-node self-reapplies on every boot once the operator
-    # has authenticated the node once.
-    extraSetFlags = [
+    extraUpFlags = [
      "--advertise-exit-node"
+      "--advertise-routes=${vars.lanCidr}"
    ];
  };
 }
@@ -1,35 +0,0 @@
-{ pkgs, vars, ... }:
-
-{
-  services.tor = {
-    enable = true;
-
-    # Opens settings.ORPort (and DirPort, unset here) in the firewall —
-    # see the nixpkgs tor module's own networking.firewall.mkIf block.
-    openFirewall = true;
-
-    relay = {
-      enable = true;
-      # Plain middle/guard relay, not "exit" — relays onion traffic between
-      # other Tor nodes without ever making requests to the public internet
-      # on a user's behalf, avoiding the abuse complaints and legal exposure
-      # an exit node invites.
-      role = "relay";
-    };
-
-    settings.ORPort = vars.ports.torRelayOrPort;
-
-    # Unix control socket at /run/tor/control (GroupWritable, group "tor")
-    # -- what nyx below actually monitors the relay through. Nyx's own
-    # default control-socket path (/var/run/tor/control) resolves to the
-    # same place, so no extra nyx config is needed.
-    controlSocket.enable = true;
-  };
-
-  # Lets the primary user's shell session read/write the control socket
-  # above without being root -- otherwise nyx fails to authenticate against
-  # it at all.
-  users.users.${vars.primaryUser}.extraGroups = [ "tor" ];
-
-  environment.systemPackages = [ pkgs.nyx ];
-}
@@ -1,14 +1,14 @@
-{ vars, ... }:
+_:

 {
  services.logrotate = {
    enable = true;

    settings = {
-      "${vars.nfsShares.dockerVolumes.mountpoint}/traefik-data/logs/*.log" = {
+      "/mnt/docker/volumes/traefik-data/logs/*.log" = {
        daily = true;
-        size = vars.traefikLogRotate.maxSize;
-        rotate = vars.traefikLogRotate.keep;
+        size = "100M";
+        rotate = 20;
        compress = true;
        missingok = true;
        notifempty = true;
@@ -0,0 +1,134 @@
+# Spec: Remove Sensitive Information from NixOS Flake
+
+## Goal
+
+Every secret currently readable in plaintext anywhere in this repo (working tree *and* git history) gets removed, replaced with `sops-nix`-managed encrypted references, and rotated. When this is done, the repo should be safe to make public without exposing anything about the systems it configures.
+
+Treat this as three sequential milestones. Do not start git history rewriting (Milestone 3) until Milestones 1 and 2 are fully verified and the flake still builds. This should be its own branch (`refactor/secrets`) until fully verified, then merged.
+
+---
+
+## Milestone 1 — Audit
+
+Before touching anything, produce a complete inventory. Do not guess at scope — grep the whole tree and the whole history.
+
+1. Run a secret scanner across the working tree and full history. Use both, since they catch different things:
+   - `gitleaks detect --source . -v --log-opts="--all"` (scans history too)
+   - `trufflehog git file://. --since-commit=$(git rev-list --max-parents=0 HEAD) --only-verified=false`
+   If neither is installed, add them via a temporary `nix-shell -p gitleaks trufflehog` — don't install anything globally on the host.
+
+2. Manually grep for the categories below, since scanners miss config-specific patterns:
+   - `hashedPassword`, `password`, `initialPassword`, `initialHashedPassword` in any `users.users.*` block
+   - `age.secrets`, `sops.secrets` (if any partial secrets work already exists — check for it)
+   - PSK / `preSharedKey`, `privateKeyFile` inline values (vs. file references) for WireGuard
+   - `authKey`, `apiToken`, `api_key`, `token =`, `secret =` in service modules (Tailscale, Cloudflare, backup tools, etc.)
+   - SSH private key material: search for `BEGIN OPENSSH PRIVATE KEY` / `BEGIN RSA PRIVATE KEY` literals
+   - TLS cert/key pairs committed under e.g. `secrets/`, `certs/`, `pki/`
+   - Real name, personal email, home address, or anything in comments/hostnames that maps a machine to your physical identity or network layout (e.g. hostnames like `wayne-desktop`, static LAN IPs, ISP-identifying info)
+   - `.env` files, `secrets.nix`, `secrets.yaml`, or any file that looks like it was meant to be gitignored but wasn't
+
+3. Produce `secrets-inventory.md` (temporary, delete before finishing) listing: file path, line, secret type, and which host/service it belongs to. This becomes the checklist for Milestone 2 — every row must be either migrated to sops or deleted, with nothing left unaccounted for.
+
+---
+
+## Milestone 2 — Migrate to sops-nix
+
+### 2.1 Set up sops-nix
+
+1. Add the flake input:
+   ```nix
+   sops-nix.url = "github:Mic92/sops-nix";
+   sops-nix.inputs.nixpkgs.follows = "nixpkgs";
+   ```
+2. Import `sops-nix.nixosModules.sops` into each host's module list (or into a shared `common.nix` if all hosts use it).
+3. Generate an age keypair **per host** (not one shared key for everything — a compromised host shouldn't decrypt every other host's secrets):
+   ```
+   nix-shell -p age --run "age-keygen -o /var/lib/sops-nix/key.txt"
+   ```
+   Print the public key (`age-keygen -y`) for each host — you'll need it for `.sops.yaml`.
+4. Also generate one age key for yourself (your admin workstation) so you can edit secrets without needing to SSH into a host: store it at `~/.config/sops/age/keys.txt`, back it up somewhere outside this repo (password manager, offline). **If this key is lost, every secret encrypted with it is unrecoverable — losing the age key is equivalent to losing the secrets.**
+5. Create `.sops.yaml` at the repo root defining creation rules: which age public keys can decrypt which secrets files, keyed by path regex, so e.g. `secrets/hostA.yaml` is decryptable by your admin key + hostA's key, `secrets/hostB.yaml` by your admin key + hostB's key.
+
+### 2.2 Migrate each secret category from the inventory
+
+For each row in `secrets-inventory.md`:
+
+- **Password hashes**: generate hash with `mkpasswd -m sha-512` (or `bcrypt` if your setup wants that), store under `sops.secrets."<name>/hashedPassword"`, reference via `users.users.<name>.hashedPasswordFile = config.sops.secrets."<name>/hashedPassword".path;`. Do not put the *plaintext* password anywhere, only the hash, and only the hash goes into the encrypted sops file.
+- **API tokens / auth keys**: move the raw value into the per-host sops YAML, reference in the module via `config.sops.secrets."<service>/token".path` — most NixOS service modules that take a token also accept a `*File` variant (e.g. `environmentFile`, `tokenFile`); use that instead of passing the value directly.
+- **Private keys / certs**: move the PEM/key content wholesale into a sops secret, output as a file with appropriate `sops.secrets.<name>.path`, `owner`, `mode`, `restartUnits` so the depending service (sshd, wireguard, nginx) reloads when the secret changes.
+- **Personal/identifying info**: this doesn't belong in sops (it's not "secret," it's just information you don't want public). Replace real names/emails with placeholders or move to a small untracked `local.nix` that's `.gitignore`'d and imported conditionally, with a documented template (`local.nix.example`) committed instead.
+
+### 2.3 Verify before moving on
+
+- `nixos-rebuild dry-build --flake .#<host>` succeeds for every host.
+- `sudo nixos-rebuild switch --flake .#<host>` on at least one real machine (or a VM) confirms secrets decrypt and services start.
+- Confirm decrypted secrets land under `/run/secrets/` (not the Nix store — anything placed in `/nix/store` is world-readable by design, so sops-nix's runtime-only placement is the whole point; double check no module accidentally pulls a secret path into a store-built config file).
+- Re-run the grep/scanner sweep from Milestone 1 against the *working tree only* (not history yet) — it should now come back clean.
+
+---
+
+## Milestone 3 — Scrub git history
+
+Do this only after Milestone 2 is merged to your main branch and confirmed working, since it rewrites every commit SHA from the point of the earliest offending commit onward.
+
+**This is destructive and irreversible on your local clone. Back up first:**
+```
+cp -r /path/to/nixos-repo /path/to/nixos-repo-backup-$(date +%F)
+```
+
+1. Install `git-filter-repo` (not the older `git filter-branch` / BFG — filter-repo is the currently maintained, faster, safer tool):
+   ```
+   nix-shell -p git-filter-repo
+   ```
+2. Use the `secrets-inventory.md` list to build a list of literal strings/paths to strip. Two approaches, use both:
+   - Path-based: if whole files were secret (e.g. `secrets.nix`, a `.env`, a private key file), remove them entirely from history:
+     ```
+     git filter-repo --path secrets.nix --path .env --invert-paths
+     ```
+   - Value-based: for secrets embedded inline in files you're keeping (not deleting the whole file), use `--replace-text` with a file listing each literal secret string to replace with `***REMOVED***`:
+     ```
+     git filter-repo --replace-text expressions.txt
+     ```
+3. After filtering, verify: run the Milestone 1 scanners again against full history (`--log-opts="--all"`). They must come back clean.
+4. Force-push the rewritten history:
+   ```
+   git push origin --force --all
+   git push origin --force --tags
+   ```
+5. **Every other clone of this repo (other machines, WSL instances, CI) must be deleted and re-cloned fresh** — a `git pull` against rewritten history will not work cleanly and risks resurrecting the old commits. Don't try to reconcile old clones; throw them away and re-clone.
+6. If this repo has ever been pushed to a public host (GitHub, etc.) or a fork/mirror exists, treat every secret that was ever in history as **permanently compromised regardless of the rewrite** — caches, forks, and Wayback-style archives can retain old commits indefinitely. History scrubbing prevents *future* exposure via `git clone`; it does not undo past exposure.
+
+---
+
+## Milestone 4 — Rotate everything
+
+Because the secrets were exposed in history (even briefly, even in a private repo), the migration is not complete until every credential in the inventory has been **rotated**, not just re-encrypted. Re-encrypting an already-leaked value protects it going forward but doesn't undo the leak.
+
+For each row in the original inventory:
+- Password hashes → change the actual account password, regenerate the hash, update the sops file.
+- API tokens/auth keys → revoke the old token in the issuing service's dashboard (Cloudflare, Tailscale, backup provider, etc.) and generate a new one.
+- SSH/WireGuard private keys → generate new keypairs, update the corresponding public key wherever it's trusted (authorized_keys, peer configs, etc.), retire the old ones.
+- TLS certs → reissue if the private key was exposed.
+
+Keep `secrets-inventory.md` open during this step and check off each row as rotated. Delete the file only once every row is checked off — it should not be committed.
+
+---
+
+## Ongoing prevention
+
+Add a pre-commit hook (or a `nix flake check` step) running `gitleaks protect --staged` so a secret can't be committed again by accident. Document in the repo README (briefly) that new secrets go through `sops <file>` to edit, never as plaintext in a tracked file.
+
+---
+
+## Definition of done
+
+- [ ] Milestone 1 inventory complete and reviewed
+- [ ] All hosts have per-host age keys; admin key backed up outside the repo
+- [ ] Every inventoried secret migrated to sops-nix, referenced via `*File`/`sops.secrets.*.path`, nothing plaintext in the working tree
+- [ ] `nixos-rebuild dry-build` and at least one real `switch` verified per host
+- [ ] Working-tree scanner sweep clean
+- [ ] History rewritten with `git-filter-repo`, force-pushed, full-history scanner sweep clean
+- [ ] All other clones deleted and re-cloned from the rewritten history
+- [ ] Every credential in the original inventory rotated (not just re-encrypted)
+- [ ] Pre-commit secret scanning hook added
+- [ ] `secrets-inventory.md` deleted from the working directory (never committed)
@@ -1,134 +0,0 @@
-#!/usr/bin/env bash
-# Bumps the NixOS release branch this flake tracks — flake.nix's
-# `nixpkgs.url` and `home-manager.url` — in one place, via targeted
-# substitution of just those two lines. Deliberately does NOT touch any
-# `system.stateVersion` anywhere in the repo: per NixOS's own docs, that
-# value must stay fixed at whatever it was on a host's first install (it
-# pins on-disk data-format defaults, not "which nixpkgs release am I on"),
-# so it's never something a channel bump should follow.
-#
-# scripts/codex-maintenance.sh's own `nixos-25.11` pin (used only to fetch
-# nixpkgs-fmt/statix — see CLAUDE.md) is a separate, independently-versioned
-# reference on purpose: it doesn't have to track the flake's own nixpkgs
-# input, since the tooling just needs to build, not match. Bump it with
-# --tooling if you want it moved too; the default run leaves it alone.
-set -euo pipefail
-
-repo_root="$(cd "$(dirname "$0")/.." && pwd)"
-flake_nix="${repo_root}/flake.nix"
-maintenance_sh="${repo_root}/scripts/codex-maintenance.sh"
-claude_md="${repo_root}/CLAUDE.md"
-
-usage() {
-  cat <<EOF
-Usage: $0 <release> [--tooling <release>]
-
-  <release>            New NixOS release for flake.nix's nixpkgs.url and
-                        home-manager.url, e.g. 26.11
-  --tooling <release>  Also bump scripts/codex-maintenance.sh's separate
-                        nixpkgs-fmt/statix pin (and its mention in
-                        CLAUDE.md) to this release. Independent of the
-                        first argument — pass the same value if you want
-                        both in sync, a different one if you don't.
-
-Examples:
-  $0 26.11
-  $0 26.11 --tooling 26.11
-EOF
-}
-
-release_re='^[0-9]{2}\.(05|11)$'
-
-if [[ $# -eq 0 || "$1" == "-h" || "$1" == "--help" ]]; then
-  usage
-  exit 0
-fi
-
-new_release="$1"
-shift
-
-tooling_release=""
-while [[ $# -gt 0 ]]; do
-  case "$1" in
-  --tooling)
-    tooling_release="${2:?--tooling requires a release argument}"
-    shift 2
-    ;;
-  *)
-    echo "Unknown argument: $1" >&2
-    usage >&2
-    exit 1
-    ;;
-  esac
-done
-
-check_release_format() {
-  local release="$1"
-  if [[ ! "$release" =~ $release_re ]]; then
-    echo "ERROR: '$release' doesn't look like a NixOS release (expected e.g. 26.11)" >&2
-    exit 1
-  fi
-}
-
-check_branch_exists() {
-  local repo_url="$1" branch="$2"
-  echo "Checking '$branch' exists on $repo_url..."
-  if ! git ls-remote --exit-code --heads "$repo_url" "$branch" >/dev/null; then
-    echo "ERROR: branch '$branch' not found on $repo_url. Typo, or not cut yet?" >&2
-    exit 1
-  fi
-}
-
-check_release_format "$new_release"
-
-current_release="$(grep -oE 'nixos-[0-9]{2}\.[0-9]{2}' "$flake_nix" | head -1 | sed 's/^nixos-//')"
-if [[ -z "$current_release" ]]; then
-  echo "ERROR: couldn't find flake.nix's current nixpkgs release" >&2
-  exit 1
-fi
-
-if [[ "$current_release" == "$new_release" ]]; then
-  echo "flake.nix is already on $new_release."
-else
-  echo "Bumping flake.nix's nixpkgs/home-manager release: $current_release -> $new_release"
-  check_branch_exists "https://github.com/NixOS/nixpkgs.git" "nixos-$new_release"
-  check_branch_exists "https://github.com/nix-community/home-manager.git" "release-$new_release"
-
-  sed -i \
-    -e "s|github:NixOS/nixpkgs/nixos-${current_release}|github:NixOS/nixpkgs/nixos-${new_release}|" \
-    -e "s|github:nix-community/home-manager/release-${current_release}|github:nix-community/home-manager/release-${new_release}|" \
-    "$flake_nix"
-
-  echo "Updated:"
-  grep -n "nixos-${new_release}\|release-${new_release}" "$flake_nix"
-fi
-
-if [[ -n "$tooling_release" ]]; then
-  check_release_format "$tooling_release"
-
-  current_tooling_release="$(grep -oE 'nixos-[0-9]{2}\.[0-9]{2}' "$maintenance_sh" | head -1 | sed 's/^nixos-//')"
-
-  if [[ "$current_tooling_release" == "$tooling_release" ]]; then
-    echo "codex-maintenance.sh's tooling pin is already on $tooling_release."
-  else
-    echo "Bumping codex-maintenance.sh's nixpkgs-fmt/statix pin: $current_tooling_release -> $tooling_release"
-    check_branch_exists "https://github.com/NixOS/nixpkgs.git" "nixos-$tooling_release"
-
-    sed -i "s|github:NixOS/nixpkgs/nixos-${current_tooling_release}|github:NixOS/nixpkgs/nixos-${tooling_release}|g" \
-      "$maintenance_sh"
-    sed -i "s|nixos-${current_tooling_release}|nixos-${tooling_release}|g" \
-      "$claude_md"
-
-    echo "Updated:"
-    grep -n "nixos-${tooling_release}" "$maintenance_sh" "$claude_md"
-  fi
-fi
-
-echo
-echo "flake.lock still points at the old input revisions until refreshed. Either:"
-echo "  nix flake update nixpkgs home-manager   # just these two inputs"
-echo "  nix flake update                        # everything — see docs/flake-lock-automation.md"
-echo
-echo "Then run 'bash scripts/codex-maintenance.sh --full-check --dry-run' before"
-echo "committing — a channel bump can shift option defaults across every host,"
-echo "and only --dry-run actually builds anything to catch that."
@@ -1,63 +1,22 @@
 #!/usr/bin/env bash
-# Validation entry point for CI and local/agent review.
-#
-# Default mode (what CI runs on every push/PR): fmt-check, statix, and eval
-# are scoped to files that actually changed against a base ref, plus
-# whichever hosts/packages those changes can affect. This exists because
-# the unscoped sweep below is slow enough to time out CI runners -- see
-# --full-check.
-#
-# --full-check: the historical full sweep (every host, every package,
-# fmt --check ./statix check . over the whole tree). Slow -- minutes, not
-# seconds. CI never passes this; run it locally before a release or after
-# touching modules/common/*, flake.nix, or variables.nix if you want extra
-# confidence beyond what the changed-files scope already covers for those
-# paths (see below).
-#
-# --dry-run: adds `nix build --dry-run --no-link` for whatever scope is
-# active (changed-files scope by default, full scope under --full-check).
 set -euo pipefail

-script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-# shellcheck source=lib/nix-bootstrap.sh
-source "${script_dir}/lib/nix-bootstrap.sh"
-# shellcheck source=lib/nix-eval.sh
-source "${script_dir}/lib/nix-eval.sh"
+export NIX_CONFIG="${NIX_CONFIG:-}
+experimental-features = nix-command flakes
+accept-flake-config = false
+warn-dirty = false
+"

-repo_root="$(cd "${script_dir}/.." && pwd)"
-cd "$repo_root"
+MODE="${1:-validate}"

-full_check=false
-dry_run=false
-
-usage() {
-  cat <<'EOF'
-Usage: scripts/codex-maintenance.sh [--full-check] [--dry-run]
-
-  --full-check  Run the full sweep: fmt-check and statix over the whole
-                repo, eval every host and package. Slow. Never run by CI.
-  --dry-run     Additionally run `nix build --dry-run --no-link` for
-                whatever scope is active.
-
-With neither flag (the CI default), fmt-check/statix/eval are scoped to
-files changed against a base ref (env MAINT_BASE_SHA, else the PR base,
-else HEAD^), plus the hosts/packages those changes can affect.
-EOF
+ensure_nix_profile() {
+  if [ -f /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh ]; then
+    . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
+  elif [ -f "$HOME/.nix-profile/etc/profile.d/nix.sh" ]; then
+    . "$HOME/.nix-profile/etc/profile.d/nix.sh"
+  fi
 }

-for arg in "$@"; do
-  case "$arg" in
-    --full-check) full_check=true ;;
-    --dry-run) dry_run=true ;;
-    -h|--help) usage; exit 0 ;;
-    *)
-      echo "Unknown argument: $arg" >&2
-      usage >&2
-      exit 1
-      ;;
-  esac
-done
-
 ensure_nix_profile

 if ! command -v nix >/dev/null 2>&1; then
@@ -65,6 +24,13 @@ if ! command -v nix >/dev/null 2>&1; then
  exit 127
 fi

+hosts_json="$(nix eval --json --no-use-registries --no-accept-flake-config .#nixosConfigurations --apply builtins.attrNames)"
+hosts="$(echo "$hosts_json" | jq -r '.[]')"
+
+echo "Hosts:"
+echo "$hosts"
+
+echo
 echo "Checking for obvious committed secrets..."
 if grep -RInE 'github_pat_|ghp_|access-tokens|hashedPassword[[:space:]]*=' \
  --exclude-dir=.git \
@@ -76,237 +42,74 @@ else
  echo "No obvious token patterns found."
 fi

-mapfile -t all_hosts < <(list_flake_targets .)
-mapfile -t all_packages < <(nix eval --json "${NIX_EVAL_FLAGS[@]}" .#packages.x86_64-linux --apply builtins.attrNames | jq -r '.[]')
-
-# host_targets_for_dir <hosts-subdir-name>
-# Prints the nixosConfigurations target names whose hostPath is
-# ./hosts/<dir>/host.nix, derived straight from flake.nix's generatedTargets
-# (one mkTarget { ... } call per line) rather than a hand-maintained table,
-# so it can't drift the way a copied mapping would.
-host_targets_for_dir() {
-  local dir="$1"
-  grep -oE '^[[:space:]]*[A-Za-z0-9_-]+ = mkTarget \{[^}]*hostPath = \./hosts/'"${dir}"'/host\.nix;[^}]*\};' flake.nix \
-    | sed -E 's/^[[:space:]]*([A-Za-z0-9_-]+) = mkTarget.*/\1/' \
-    || true
-}
-
-declare -a changed_files=()
-scope_desc="full repo"
-
-if ! $full_check; then
-  resolve_base_ref() {
-    if [[ -n "${MAINT_BASE_SHA:-}" ]] && git cat-file -e "${MAINT_BASE_SHA}^{commit}" 2>/dev/null; then
-      echo "$MAINT_BASE_SHA"
-      return
-    fi
-    if git rev-parse --verify -q HEAD^ >/dev/null 2>&1; then
-      echo "HEAD^"
-      return
-    fi
-    git hash-object -t tree /dev/null
-  }
-
-  base_ref="$(resolve_base_ref)"
-  echo
-  echo "Changed-files scope: diffing against ${base_ref}"
-  mapfile -t changed_files < <(git diff --name-only --diff-filter=ACMR "$base_ref" -- . | sort -u)
-
-  if [[ ${#changed_files[@]} -eq 0 ]]; then
-    echo "No changed files detected."
-  else
-    printf '  %s\n' "${changed_files[@]}"
-  fi
-  scope_desc="changed files only (base: ${base_ref})"
-fi
-
-# Whole-tree fmt/lint always run under --full-check; otherwise scoped below.
-declare -a changed_nix_files=()
-for f in "${changed_files[@]:-}"; do
-  [[ "$f" == *.nix && -f "$f" ]] && changed_nix_files+=("$f")
-done
-
 echo
 echo "Checking Nix formatting with nixpkgs-fmt..."
-if $full_check; then
-  nix run "${NIX_EVAL_FLAGS[@]}" github:NixOS/nixpkgs/nixos-25.11#nixpkgs-fmt -- --check .
-elif [[ ${#changed_nix_files[@]} -gt 0 ]]; then
-  nix run "${NIX_EVAL_FLAGS[@]}" github:NixOS/nixpkgs/nixos-25.11#nixpkgs-fmt -- --check "${changed_nix_files[@]}"
-else
-  echo "No changed .nix files; skipping."
-fi
+nix run --no-use-registries --no-accept-flake-config github:NixOS/nixpkgs/nixos-25.11#nixpkgs-fmt -- --check .

 echo
 echo "Running statix lint..."
-if $full_check; then
-  nix run "${NIX_EVAL_FLAGS[@]}" github:NixOS/nixpkgs/nixos-25.11#statix -- check .
-elif [[ ${#changed_nix_files[@]} -gt 0 ]]; then
-  for f in "${changed_nix_files[@]}"; do
-    nix run "${NIX_EVAL_FLAGS[@]}" github:NixOS/nixpkgs/nixos-25.11#statix -- check "$f"
-  done
-else
-  echo "No changed .nix files; skipping."
-fi
-
-# Figure out which hosts/packages this run needs to eval (and, under
-# --dry-run, build). full_check always means "everything"; otherwise a
-# change to flake.nix/flake.lock/variables.nix/modules/common/* (repo-wide
-# inputs) or to any other modules/*.nix outside platforms//build-types
-# (whose blast radius isn't safely inferable from the path alone -- see
-# CLAUDE.md's "Grep modules/build-types/*.nix for each build type's imports
-# list") also falls back to everything, on the same reasoning CLAUDE.md
-# already gives interactive sessions for when to run the full sweep.
-# Anything more targeted -- a host.nix, a platform module, a build-type
-# module -- narrows to just the hosts it can affect.
-declare -A affected_hosts=()
-eval_packages=false
-
-if $full_check; then
-  for h in "${all_hosts[@]}"; do affected_hosts[$h]=1; done
-  eval_packages=true
-else
-  full_fallback=false
-  for f in "${changed_files[@]:-}"; do
-    case "$f" in
-      flake.nix|flake.lock|variables.nix|modules/common/*)
-        full_fallback=true
-        ;;
-    esac
-  done
-
-  if ! $full_fallback; then
-    for f in "${changed_files[@]:-}"; do
-      case "$f" in
-        hosts/*/*)
-          hostdir="${f#hosts/}"
-          hostdir="${hostdir%%/*}"
-          while IFS= read -r t; do
-            [[ -n "$t" ]] && affected_hosts[$t]=1
-          done < <(host_targets_for_dir "$hostdir")
-          ;;
-        modules/platforms/*.nix)
-          platform="$(basename "$f" .nix)"
-          for h in "${all_hosts[@]}"; do
-            [[ "$h" == "${platform}-"* ]] && affected_hosts[$h]=1
-          done
-          ;;
-        modules/build-types/*.nix)
-          buildtype="$(basename "$f" .nix)"
-          for h in "${all_hosts[@]}"; do
-            [[ "$h" == *"-${buildtype}" ]] && affected_hosts[$h]=1
-          done
-          ;;
-        modules/installer/*)
-          # iso.nix (imported by both the "installer" nixosConfigurations
-          # target and netbootSystem, which backs packages.pxe) pulls in
-          # common.nix, so a common.nix change reaches all three.
-          affected_hosts[installer]=1
-          eval_packages=true
-          ;;
-        modules/pxe-boot/*)
-          # stage-installer-artifacts.nix is imported by
-          # modules/build-types/pxe-boot.nix only -- same blast radius as a
-          # build-types/*.nix change, not a packages one.
-          for h in "${all_hosts[@]}"; do
-            [[ "$h" == *"-pxe-boot" ]] && affected_hosts[$h]=1
-          done
-          ;;
-        modules/*)
-          full_fallback=true
-          ;;
-      esac
-    done
-  fi
-
-  if $full_fallback; then
-    echo
-    echo "Changed files affect shared config; falling back to evaluating every host/package."
-    for h in "${all_hosts[@]}"; do affected_hosts[$h]=1; done
-    eval_packages=true
-  fi
-fi
-
-mapfile -t hosts < <(for h in "${!affected_hosts[@]}"; do echo "$h"; done | sort)
+nix run --no-use-registries --no-accept-flake-config github:NixOS/nixpkgs/nixos-25.11#statix -- check .

 echo
-echo "Checking nix-cache host key for drift..."
-if bash "${script_dir}/secrets/sync-nix-cache-host-key.sh" --check; then
-  :
-else
-  drift_status=$?
-  if [[ "$drift_status" -eq 2 ]]; then
-    echo "nix-cache unreachable from here -- skipping host-key drift check."
-  else
-    echo "WARNING: nix-cache's host key has drifted from variables.nix (see above)." >&2
-    echo "  Run 'bash scripts/secrets/sync-nix-cache-host-key.sh' to fix." >&2
-  fi
-fi
+echo "Evaluating host toplevel derivations..."
+for host in $hosts; do
+  echo "==> $host"
+  nix eval --raw --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.toplevel.drvPath"
+
+  # lxc-* hosts deploy via a directly pct-restore-able tarball instead of
+  # nixos-install (see docs/auto-installer.md); proxmox-* hosts (excluding
+  # proxmox-lxc, the installer's own LXC target, which has no disko config)
+  # can alternatively be built as a standalone disk image (see
+  # docs/proxmox-images.md). Both are otherwise-unvalidated buildable
+  # surface, easy to silently break without this.
+  case "$host" in
+    lxc-*)
+      echo "==> $host (tarball)"
+      nix eval --raw --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.tarball.drvPath"
+      ;;
+    proxmox-lxc) ;;
+    proxmox-*)
+      echo "==> $host (diskoImagesScript)"
+      nix eval --raw --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.diskoImagesScript.drvPath"
+      ;;
+  esac
+done

 echo
-if [[ ${#hosts[@]} -eq 0 ]]; then
-  echo "No hosts affected by changed files; skipping host eval."
-else
-  echo "Evaluating host toplevel derivations (${scope_desc})..."
-  for host in "${hosts[@]}"; do
-    echo "==> $host"
-    nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.toplevel.drvPath"
+echo "Evaluating buildable packages..."
+packages_json="$(nix eval --json --no-use-registries --no-accept-flake-config .#packages.x86_64-linux --apply builtins.attrNames)"
+packages="$(echo "$packages_json" | jq -r '.[]')"
+for pkg in $packages; do
+  echo "==> packages.x86_64-linux.${pkg}"
+  nix eval --raw --no-use-registries --no-accept-flake-config ".#packages.x86_64-linux.${pkg}"
+done

-    # lxc-* hosts deploy via a directly pct-restore-able tarball instead of
-    # nixos-install (see docs/auto-installer.md); proxmox-* hosts can
-    # alternatively be built as a standalone disk image (see
-    # docs/proxmox-images.md). Both are otherwise-unvalidated buildable
-    # surface, easy to silently break without this.
-    case "$host" in
-      lxc-*)
-        echo "==> $host (tarball)"
-        nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.tarball.drvPath"
-        ;;
-      proxmox-*)
-        echo "==> $host (diskoImagesScript)"
-        nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.diskoImagesScript.drvPath"
-        ;;
-    esac
-  done
-fi
-
-echo
-if ! $eval_packages; then
-  echo "No packages affected by changed files; skipping package eval."
-else
-  echo "Evaluating buildable packages..."
-  for pkg in "${all_packages[@]}"; do
-    echo "==> packages.x86_64-linux.${pkg}"
-    nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#packages.x86_64-linux.${pkg}"
-  done
-fi
-
-if $dry_run; then
+if [[ "$MODE" == "dry-run" ]]; then
  echo
-  echo "Running dry-run builds for the active scope. This will not create result symlinks."
-  for host in "${hosts[@]:-}"; do
+  echo "Running dry-run builds for all hosts. This will not create result symlinks."
+  for host in $hosts; do
    echo "==> Dry-run build: $host"
-    nix build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.toplevel"
+    nix build --dry-run --no-link --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.toplevel"

    case "$host" in
      lxc-*)
        echo "==> Dry-run build: $host (tarball)"
-        nix build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.tarball"
+        nix build --dry-run --no-link --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.tarball"
        ;;
+      proxmox-lxc) ;;
      proxmox-*)
        echo "==> Dry-run build: $host (diskoImagesScript)"
-        nix build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.diskoImagesScript"
+        nix build --dry-run --no-link --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.diskoImagesScript"
        ;;
    esac
  done

-  if $eval_packages; then
-    echo
-    echo "Running dry-run builds for packages."
-    for pkg in "${all_packages[@]}"; do
-      echo "==> Dry-run build: packages.x86_64-linux.${pkg}"
-      nix build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}" ".#packages.x86_64-linux.${pkg}"
-    done
-  fi
+  echo
+  echo "Running dry-run builds for all packages."
+  for pkg in $packages; do
+    echo "==> Dry-run build: packages.x86_64-linux.${pkg}"
+    nix build --dry-run --no-link --no-use-registries --no-accept-flake-config ".#packages.x86_64-linux.${pkg}"
+  done
 fi

 echo
@@ -1,11 +1,19 @@
 #!/usr/bin/env bash
 set -euo pipefail

-script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-# shellcheck source=lib/nix-bootstrap.sh
-source "${script_dir}/lib/nix-bootstrap.sh"
-# shellcheck source=lib/nix-eval.sh
-source "${script_dir}/lib/nix-eval.sh"
+export NIX_CONFIG="${NIX_CONFIG:-}
+experimental-features = nix-command flakes
+accept-flake-config = false
+warn-dirty = false
+"
+
+ensure_nix_profile() {
+  if [ -f /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh ]; then
+    . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
+  elif [ -f "$HOME/.nix-profile/etc/profile.d/nix.sh" ]; then
+    . "$HOME/.nix-profile/etc/profile.d/nix.sh"
+  fi
+}

 install_nix_if_missing() {
  if command -v nix >/dev/null 2>&1; then
@@ -41,17 +49,6 @@ warn-dirty = false
 build-users-group = nixbld
 EOF

-    # The official installer's single-user root path still shells out to
-    # `sudo` to create /nix even though it already knows it's running as
-    # root -- confirmed live against a sudo-less minimal Debian/Proxmox
-    # node, where it fails with "sudo: not found" and prints this exact
-    # mkdir/chown as the manual fix. Pre-create it so that branch of the
-    # installer is skipped entirely.
-    if [ ! -d /nix ]; then
-      mkdir -m 0755 /nix
-      chown root /nix
-    fi
-
    sh <(curl -L https://nixos.org/nix/install) --no-daemon
  else
    sh <(curl -L https://nixos.org/nix/install) --no-daemon
@@ -82,6 +79,13 @@ if ! command -v jq >/dev/null 2>&1; then
 fi

 echo "Available NixOS hosts:"
-list_flake_targets .
+hosts="$(nix eval --json --no-use-registries --no-accept-flake-config .#nixosConfigurations --apply builtins.attrNames | jq -r '.[]')"
+echo "$hosts"

-echo "Codex setup complete. Run bash scripts/codex-maintenance.sh to validate changes."
+echo "Evaluating all host toplevel derivations..."
+for host in $hosts; do
+  echo "==> Evaluating $host"
+  nix eval --raw --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.toplevel.drvPath"
+done
+
+echo "Codex setup complete."
@@ -1,164 +0,0 @@
-#!/usr/bin/env bash
-# Shared config for scripts/*.sh. Source this instead of hardcoding a
-# second copy of these values in every script:
-#   source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/env.sh"
-# Every variable can still be overridden per-invocation via the
-# environment (e.g. PROXMOX_STORAGE=tank-nvme ./scripts/proxmox/create-proxmox-resource.sh ...)
-# since each one only sets a default if unset.
-
-# SSH-reachable Proxmox node that scripts/proxmox/create-proxmox-resource.sh runs
-# pct/qm on. Matches the Proxmox web UI hostname already used in
-# hosts/nixos/home.nix's desktop shortcuts (pve.<homeDomain> from
-# variables.nix) -- change this if that's not actually reachable over SSH,
-# or if you're targeting a different node in a multi-node cluster.
-: "${PROXMOX_HOST:=pve.sweet.home}"
-: "${PROXMOX_SSH_USER:=root}"
-
-# Where this flake repo lives on the Proxmox node itself.
-# scripts/proxmox/create-proxmox-resource.sh builds images directly on the node
-# instead of transferring them over the network -- it clones the repo here
-# (from this checkout's own `origin` remote) the first time it doesn't
-# find it, installing build tooling via scripts/codex-setup.sh, then
-# `git pull`s it before every subsequent build.
-: "${PROXMOX_REMOTE_REPO_DIR:=/root/nixos}"
-
-# Storage pool names -- Proxmox's own stock-install defaults, but this
-# varies a lot by setup (ZFS pool name, custom LVM-thin volume, etc.).
-# Verify with `pvesm status` on the node and correct these if wrong.
-: "${PROXMOX_STORAGE:=local-lvm}"     # VM disks / CT rootfs
-: "${PROXMOX_ISO_STORAGE:=local}"     # uploaded images/ISOs/CT templates
-
-: "${PROXMOX_BRIDGE:=vmbr0}"
-
-# Fallback resource sizing when a script doesn't get --cores/--memory.
-: "${PROXMOX_DEFAULT_CORES:=2}"
-: "${PROXMOX_DEFAULT_MEMORY_MB:=2048}"
-
-# `pct create` (unlike `pct restore`) requires an explicit rootfs size --
-# no backup metadata to infer it from. Matches Proxmox's own GUI default.
-: "${PROXMOX_DEFAULT_LXC_DISK_GB:=8}"
-
-# `pct create --memory` only sets RAM -- swap is a wholly separate
-# parameter that otherwise silently stays at Proxmox's own 512M default
-# regardless of --memory (confirmed: creating with --memory 2048 left
-# swap at 512). create-proxmox-resource.sh defaults --swap to whatever
-# --memory resolves to at runtime rather than a static value here, so it
-# tracks a --memory picked at the CLI too, not just the default above.
-
-# Required for a modern (v247+) systemd guest to actually boot as an
-# unprivileged container: systemd's routine use of nested user namespaces
-# and credential mounts (LoadCredential=, DynamicUser=, etc. -- used even
-# by plain getty units) gets denied by AppArmor's default LXC confinement
-# without these. Confirmed live: without them, every getty unit
-# crash-loops on a denied `/run/credentials/*` mount every ~3s (visible
-# as garbage on the console) and core services like nsncd fail the same
-# way on userns_create; system.build.tarball never finishes activating.
-#
-# mount=nfs;nfs4: without it, AppArmor blanket-denies the `nfs`/
-# `rpc_pipefs` mount syscalls any NFS client share needs -- confirmed
-# live on lxc-docker (which mounts several, see modules/docker/mount-data.nix
-# and modules/raspi/mount-data.nix): `mount: /var/lib/nfs/rpc_pipefs:
-# permission denied`. Harmless to grant on lxc targets that don't mount
-# NFS at all -- it only widens what the container is *allowed* to mount,
-# nothing here forces a mount to happen.
-: "${PROXMOX_DEFAULT_LXC_FEATURES:=nesting=1,keyctl=1,mount=nfs;nfs4}"
-
-export PROXMOX_HOST PROXMOX_SSH_USER PROXMOX_STORAGE PROXMOX_ISO_STORAGE \
-  PROXMOX_BRIDGE PROXMOX_DEFAULT_CORES PROXMOX_DEFAULT_MEMORY_MB \
-  PROXMOX_DEFAULT_LXC_DISK_GB PROXMOX_DEFAULT_LXC_FEATURES \
-  PROXMOX_REMOTE_REPO_DIR
-
-# Matches variables.nix's nixCacheHost -- update both if it ever changes.
-: "${NIX_CACHE_HOST:=nix-cache}"
-export NIX_CACHE_HOST
-
-# nix_extra_opts: call as a plain statement (NOT inside $(...)/<(...) --
-# that forks a subshell, and the whole point is exporting a decision back
-# into *this* shell) to populate the global NIX_OPTS array with whatever
-# extra `nix`/`nix-shell` CLI options are needed to avoid nix-cache when
-# it's unreachable:
-#   nix_extra_opts
-#   nix build "${NIX_OPTS[@]}" ...
-#
-# Without this, every single `nix eval`/`nix build` call retries each
-# store path against a dead substituter up to 5 times with backoff
-# (confirmed: ~15s+ per lookup even with a short connect-timeout, because
-# nix's own retry count isn't controllable that way), and separately
-# tries it as a remote builder too -- both fail independently, so both
-# are checked.
-#
-# Checked with a single fast `curl`/TCP probe (bypassing nix's retry logic
-# entirely) the first time this is called in a given process, and the
-# result is exported as NIX_EXTRA_OPTS so a script that shells out to
-# another script in this repo (e.g. create-proxmox-resource.sh calling
-# sync-host-keys.sh) reuses the same decision instead of probing twice.
-declare -a NIX_OPTS=()
-
-nix_extra_opts() {
-  if [[ -n "${NIX_EXTRA_OPTS_DECIDED:-}" ]]; then
-    if [[ -n "${NIX_EXTRA_OPTS:-}" ]]; then
-      eval "NIX_OPTS=(${NIX_EXTRA_OPTS})"
-    else
-      NIX_OPTS=()
-    fi
-    return
-  fi
-  export NIX_EXTRA_OPTS_DECIDED=1
-  NIX_OPTS=()
-
-  # Retry a couple of times, 1s apart, before believing either check --
-  # belt-and-suspenders against a genuine multi-second blip (nix-cache
-  # restarting), on top of the fix below. Worst case (~11s total, host
-  # genuinely gone) is still nowhere near the 15s+ *per lookup* nix's own
-  # substituter retries would cost if this check didn't exist at all.
-  local attempt cache_up=0 builder_up=0
-  for attempt in 1 2 3; do
-    if curl --silent --fail --max-time 3 "http://${NIX_CACHE_HOST}/nix-cache-info" >/dev/null 2>&1; then
-      cache_up=1
-      break
-    fi
-    [[ "$attempt" -lt 3 ]] && sleep 1
-  done
-
-  if [[ "$cache_up" -eq 0 ]]; then
-    echo "nix-cache (http://${NIX_CACHE_HOST}) is unreachable -- skipping it (substituter + remote builder) for the rest of this run." >&2
-    NIX_OPTS=(--option substituters "https://cache.nixos.org/" --builders "")
-  else
-    for attempt in 1 2 3; do
-      # `exec 3<>/dev/tcp/...` just opens the fd and returns -- it does NOT
-      # read from it. Confirmed live this is load-bearing, not stylistic:
-      # the previous `cat < /dev/tcp/.../22` blocked forever and always hit
-      # the timeout even against a perfectly healthy nix-cache, because
-      # sshd sends its banner and then holds the connection open waiting
-      # for the client to speak next -- `cat` never sees EOF, so this
-      # check reported "unreachable" unconditionally, 100% of the time,
-      # regardless of whether the remote builder was actually up.
-      if timeout 3 bash -c "exec 3<>/dev/tcp/${NIX_CACHE_HOST}/22" 2>/dev/null; then
-        builder_up=1
-        break
-      fi
-      [[ "$attempt" -lt 3 ]] && sleep 1
-    done
-    if [[ "$builder_up" -eq 0 ]]; then
-      echo "nix-cache's SSH remote builder (nixremote@${NIX_CACHE_HOST}:22) is unreachable -- disabling remote builds for the rest of this run." >&2
-      NIX_OPTS=(--builders "")
-    fi
-  fi
-
-  # `printf '%q '` with a genuinely empty NIX_OPTS still runs one format
-  # pass over a missing argument and yields the literal `'' ` rather than
-  # an empty string (confirmed live) -- a subprocess that later does
-  # `eval "NIX_OPTS=(${NIX_EXTRA_OPTS})"` (the branch above, for e.g.
-  # sync-host-keys.sh reusing this process's decision) would then rebuild
-  # a 1-element array holding an empty string instead of a 0-element
-  # array, and `nix-shell "${NIX_OPTS[@]}" -p <pkg>` chokes on that stray
-  # element as a bogus positional argument. Guard the empty case
-  # explicitly so nix-cache being reachable (NIX_OPTS legitimately empty)
-  # round-trips as truly empty instead.
-  if [[ ${#NIX_OPTS[@]} -gt 0 ]]; then
-    printf -v NIX_EXTRA_OPTS '%q ' "${NIX_OPTS[@]}"
-  else
-    NIX_EXTRA_OPTS=""
-  fi
-  export NIX_EXTRA_OPTS
-}
@@ -1,21 +0,0 @@
-#!/usr/bin/env bash
-# Shared "type X to confirm" prompt for scripts/proxmox/create-proxmox-resource.sh
-# (--modify, and replacing an existing --allow-duplicate-host resource) and
-# scripts/secrets/sync-host-keys.sh (--regenerate-all-keys) -- three destructive
-# confirmations that all work the same way (echo the expected value back
-# exactly), kept in one place so the prompt/comparison logic can't drift.
-# Source alongside env.sh:
-#   source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/lib/confirm.sh"
-#
-# Deliberately does NOT print anything on mismatch or decide exit-vs-return
-# -- callers vary on both (a top-level script exits, a subcommand function
-# returns; wording differs too), so that stays at the call site.
-
-# confirm_typed <expected> <prompt>
-# Prints <prompt> via `read -rp`, then reports (via exit status) whether the
-# typed input matched <expected> exactly.
-confirm_typed() {
-  local expected="$1" prompt="$2" input
-  read -rp "$prompt" input
-  [[ "$input" == "$expected" ]]
-}
@@ -1,20 +0,0 @@
-#!/usr/bin/env bash
-# Shared Nix bootstrap for scripts/codex-setup.sh and
-# scripts/codex-maintenance.sh: the nix.conf settings both need in effect
-# before a single `nix` command runs (flakes enabled, never honor a flake
-# input's own nixConfig, no "dirty tree" warning spam), plus a helper to
-# pull an already-installed Nix's daemon/profile script onto PATH if it
-# isn't there yet. Source this instead of copying it -- see CLAUDE.md.
-export NIX_CONFIG="${NIX_CONFIG:-}
-experimental-features = nix-command flakes
-accept-flake-config = false
-warn-dirty = false
-"
-
-ensure_nix_profile() {
-  if [ -f /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh ]; then
-    . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
-  elif [ -f "$HOME/.nix-profile/etc/profile.d/nix.sh" ]; then
-    . "$HOME/.nix-profile/etc/profile.d/nix.sh"
-  fi
-}
@@ -1,36 +0,0 @@
-#!/usr/bin/env bash
-# Shared flake-introspection helpers for scripts/*.sh. Source alongside
-# env.sh:
-#   source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/lib/nix-eval.sh"
-#
-# NIX_EVAL_FLAGS: --no-use-registries so a call here never resolves through
-# the user's global flake registry (every call targets this repo's own
-# flake, or an explicit github: ref, not a registry alias); --no-accept-flake-config
-# so a flake input's own nixConfig (e.g. a dependency's substituters) is
-# never honored -- matches accept-flake-config = false already set repo-wide
-# (see lib/nix-bootstrap.sh / CLAUDE.md). Reuse this array rather than
-# retyping the two flags at each call site.
-declare -a NIX_EVAL_FLAGS=(--no-use-registries --no-accept-flake-config)
-
-# list_flake_targets <flake_ref>
-# Prints the attribute names under <flake_ref>#nixosConfigurations, one per
-# line, e.g.:
-#   list_flake_targets .            # from inside the repo
-#   list_flake_targets "$repo_root" # from anywhere
-list_flake_targets() {
-  local flake_ref="$1"
-  nix eval --json "${NIX_EVAL_FLAGS[@]}" \
-    "${flake_ref}#nixosConfigurations" --apply builtins.attrNames \
-  | jq -r '.[]'
-}
-
-# flake_target_hostname <flake_ref> <target>
-# Prints one nixosConfigurations target's config.networking.hostName.
-# Empty (not an error under set -e) if the target doesn't exist or the
-# eval otherwise fails -- callers that need to distinguish "empty" from
-# "eval failed" should check $? themselves instead of relying on this.
-flake_target_hostname() {
-  local flake_ref="$1" target="$2"
-  nix eval --raw "${NIX_EVAL_FLAGS[@]}" \
-    "${flake_ref}#nixosConfigurations.${target}.config.networking.hostName" 2>/dev/null
-}
@@ -1,52 +0,0 @@
-#!/usr/bin/env bash
-# Shared sops/age helpers for scripts/secrets/backup-admin-key.sh,
-# scripts/secrets/rotate-admin-key.sh, and scripts/secrets/sync-host-keys.sh -- all three
-# derive an age public key from a private identity file the same way, two
-# of them resolve the same sops/age default key-file path, and two of them
-# run `sops updatekeys` the same way. Kept in one place so they can't drift
-# apart. Source alongside env.sh:
-#   source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/lib/sops-age.sh"
-#
-# Uses NIX_OPTS (an array of extra `nix-shell` options -- see env.sh's
-# nix_extra_opts) if the caller has already set it, same convention as
-# lib/ssh-host-keys.sh. Falls back to no extra options if the caller never
-# sourced env.sh.
-if ! declare -p NIX_OPTS >/dev/null 2>&1; then
-  declare -a NIX_OPTS=()
-fi
-
-# sops/age's own default identity-file resolution order, minus $SOPS_AGE_KEY
-# itself (an inline identity, not a path -- callers that accept it check it
-# separately, before falling back to this).
-: "${DEFAULT_SOPS_AGE_KEY_FILE:=${SOPS_AGE_KEY_FILE:-${XDG_CONFIG_HOME:-$HOME/.config}/sops/age/keys.txt}}"
-
-# age_pubkey_from_identity_file <identity-file>
-# Prints the age public key for a private identity file (age-keygen -y).
-age_pubkey_from_identity_file() {
-  local identity_file="$1"
-  nix-shell "${NIX_OPTS[@]}" -p age --run "age-keygen -y '${identity_file}'"
-}
-
-# sops_yaml_admin_pubkey <sops-yaml-path>
-# Prints .sops.yaml's current &admin age public key, or empty (not an error
-# under set -e) if no such anchor line exists -- callers that need to treat
-# "missing" as fatal check for an empty result themselves.
-sops_yaml_admin_pubkey() {
-  local sops_yaml="$1"
-  grep -E '^  - &admin age1' "$sops_yaml" 2>/dev/null | awk '{print $NF}' || true
-}
-
-# sops_updatekeys <secrets-file> [key-file]
-# Re-encrypts <secrets-file> for .sops.yaml's current recipient set. If
-# <key-file> is given, decrypts with that identity (SOPS_AGE_KEY_FILE)
-# instead of whatever's ambient -- needed when the ambient default key
-# doesn't match yet (e.g. mid-rotation, decrypting with the outgoing key).
-sops_updatekeys() {
-  local secrets_file="$1" key_file="${2:-}"
-  if [[ -n "$key_file" ]]; then
-    SOPS_AGE_KEY_FILE="$key_file" nix-shell "${NIX_OPTS[@]}" -p sops --run \
-      "sops updatekeys --yes '${secrets_file}'"
-  else
-    nix-shell "${NIX_OPTS[@]}" -p sops --run "sops updatekeys --yes '${secrets_file}'"
-  fi
-}
@@ -1,30 +0,0 @@
-#!/usr/bin/env bash
-# Shared SSH-host-key / age-conversion helpers for scripts/secrets/sync-host-keys.sh
-# and scripts/secrets/prepare-host-key.sh -- both generate the same kind of key
-# (ed25519, no passphrase, the sops-nix age-derivation input) and convert it
-# to an age recipient the same way; kept in one place so the two can't
-# drift apart.
-#
-# Uses NIX_OPTS (an array of extra `nix-shell` options -- see env.sh's
-# nix_extra_opts) if the caller has already set it, so a decision to avoid
-# an unreachable nix-cache is reused here instead of probed again. Falls
-# back to no extra options if the caller never sourced env.sh.
-if ! declare -p NIX_OPTS >/dev/null 2>&1; then
-  declare -a NIX_OPTS=()
-fi
-
-# generate_host_ed25519_key <hostname> <keyfile>
-# Writes <keyfile> and <keyfile>.pub. Caller is responsible for refusing to
-# overwrite an existing keyfile -- this always runs ssh-keygen fresh.
-generate_host_ed25519_key() {
-  local hostname="$1" keyfile="$2"
-  nix-shell "${NIX_OPTS[@]}" -p openssh --run \
-    "ssh-keygen -t ed25519 -N '' -C '${hostname}' -f '${keyfile}'" >/dev/null
-}
-
-# ssh_pubkey_to_age <pubkeyfile>
-# Prints the age public key derived from an ed25519 SSH public key file.
-ssh_pubkey_to_age() {
-  local pubkeyfile="$1"
-  nix-shell "${NIX_OPTS[@]}" -p ssh-to-age --run "ssh-to-age -i '${pubkeyfile}'"
-}
@@ -1,180 +0,0 @@
-#!/usr/bin/env python3
-# Companion to scripts/sync-host-keys.sh. Applies a set of additive edits
-# to .sops.yaml via targeted line insertion -- not a full YAML parse and
-# re-serialize -- so every untouched byte of the file is guaranteed to stay
-# exactly as it was (a full round-trip through a generic YAML library was
-# tested and silently reformatted the whole file's indentation style).
-#
-# Reads a JSON edit plan from stdin:
-#   {
-#     "add_keys": [{"host": "lxc-server", "age_key": "age1..."}],
-#     "add_aliases": [{"host": "lxc-server", "basename": "common.yaml"}],
-#     "remove_keys": ["lxc-server"],
-#     "remove_aliases_for_hosts": ["lxc-server"]
-#   }
-# Idempotent: an anchor or alias that's already present/absent is left
-# alone -- adding what's already there, or removing what's already gone,
-# is a no-op rather than an error.
-# Prints a JSON summary of what actually changed to stdout, so the caller
-# knows which secrets/*.yaml files need `sops updatekeys` and which don't.
-import json
-import re
-import sys
-
-KEY_LINE_RE = re.compile(r"^  - &\S+ age1")
-
-
-def add_keys(lines, add_keys):
-    existing_anchors = set()
-    for line in lines:
-        m = re.match(r"^  - &(\S+) age1", line)
-        if m:
-            existing_anchors.add(m.group(1))
-
-    new = [e for e in add_keys if e["host"] not in existing_anchors]
-    if not new:
-        return lines, []
-
-    last_idx = None
-    for i, line in enumerate(lines):
-        if KEY_LINE_RE.match(line):
-            last_idx = i
-    if last_idx is None:
-        print("ERROR: no '  - &<name> age1...' line found under keys: in .sops.yaml", file=sys.stderr)
-        sys.exit(1)
-
-    insert = [f"  - &{e['host']} {e['age_key']}\n" for e in new]
-    lines = lines[: last_idx + 1] + insert + lines[last_idx + 1 :]
-    return lines, [e["host"] for e in new]
-
-
-def add_aliases(lines, add_aliases):
-    changed_files = []
-    for e in add_aliases:
-        host = e["host"]
-        basename = e["basename"]
-        target = "path_regex: secrets/" + basename.replace(".", r"\.") + "$"
-
-        rule_start = None
-        for i, line in enumerate(lines):
-            if target in line:
-                rule_start = i
-                break
-        if rule_start is None:
-            print(
-                f"WARNING: no creation_rule for secrets/{basename} in .sops.yaml "
-                f"(needed by {host}) -- add one manually, then re-run.",
-                file=sys.stderr,
-            )
-            continue
-
-        rule_end = len(lines)
-        for i in range(rule_start + 1, len(lines)):
-            if re.match(r"^  - path_regex:", lines[i]):
-                rule_end = i
-                break
-
-        block = lines[rule_start:rule_end]
-        if any(re.search(r"\*" + re.escape(host) + r"\s*$", line) for line in block):
-            continue  # already present
-
-        last_alias_idx = None
-        last_alias_indent = None
-        for i in range(rule_start, rule_end):
-            m = re.match(r"^(\s*)- \*\S+\s*$", lines[i])
-            if m:
-                last_alias_idx = i
-                last_alias_indent = m.group(1)
-        if last_alias_idx is None:
-            print(
-                f"WARNING: creation_rule for secrets/{basename} has no existing "
-                f"'- *alias' line to anchor the insertion point -- add {host} manually.",
-                file=sys.stderr,
-            )
-            continue
-
-        new_line = f"{last_alias_indent}- *{host}\n"
-        lines = lines[: last_alias_idx + 1] + [new_line] + lines[last_alias_idx + 1 :]
-        changed_files.append(basename)
-    return lines, changed_files
-
-
-def remove_keys(lines, hosts):
-    hosts = set(hosts)
-    removed = []
-    kept = []
-    for line in lines:
-        m = re.match(r"^  - &(\S+) age1", line)
-        if m and m.group(1) in hosts:
-            removed.append(m.group(1))
-            continue
-        kept.append(line)
-    return kept, removed
-
-
-def remove_aliases_for_hosts(lines, hosts):
-    hosts = set(hosts)
-    if not hosts:
-        return lines, []
-
-    changed_files = []
-    result = []
-    current_basename = None
-    current_block_changed = False
-
-    def flush():
-        if current_block_changed and current_basename:
-            changed_files.append(current_basename)
-
-    for line in lines:
-        if re.match(r"^  - path_regex:", line):
-            flush()
-            current_block_changed = False
-            m = re.search(r"path_regex: secrets/(.+)\$", line)
-            current_basename = m.group(1).replace(r"\.", ".") if m else None
-            result.append(line)
-            continue
-
-        if current_basename is not None and any(
-            re.search(r"\*" + re.escape(h) + r"\s*$", line) for h in hosts
-        ):
-            current_block_changed = True
-            continue  # drop this alias line
-
-        result.append(line)
-
-    flush()
-    return result, changed_files
-
-
-def main():
-    sops_path = sys.argv[1]
-    edits = json.load(sys.stdin)
-
-    with open(sops_path) as f:
-        lines = f.readlines()
-
-    lines, added_keys = add_keys(lines, edits.get("add_keys", []))
-    lines, added_alias_files = add_aliases(lines, edits.get("add_aliases", []))
-    lines, removed_keys = remove_keys(lines, edits.get("remove_keys", []))
-    lines, removed_alias_files = remove_aliases_for_hosts(
-        lines, edits.get("remove_aliases_for_hosts", [])
-    )
-
-    with open(sops_path, "w") as f:
-        f.writelines(lines)
-
-    changed_files = sorted(set(added_alias_files) | set(removed_alias_files))
-    json.dump(
-        {
-            "added_keys": added_keys,
-            "removed_keys": removed_keys,
-            "changed_secrets_files": changed_files,
-        },
-        sys.stdout,
-    )
-    print()
-
-
-if __name__ == "__main__":
-    main()
@@ -1,13 +1,9 @@
 #!/usr/bin/env bash
-# Generates a new machine's SSH host key by an arbitrary name, before it
-# necessarily has a flake target yet -- prints the .sops.yaml snippet to
-# add by hand. For any host that already has a flake target,
-# scripts/secrets/sync-host-keys.sh <target> does this same job plus the
-# .sops.yaml/key_groups registration and re-encryption automatically; use
-# this script only to pre-generate a key ahead of adding the flake target
-# itself.
+# Generates a new machine's SSH host key ahead of installing it, so
+# sops-nix has something to derive an age key from before the target
+# ever boots.
 #
-# Why a host key is needed at all: sops-nix derives each host's decryption key from
+# Why this is needed: sops-nix derives each host's decryption key from
 # its own /etc/ssh/ssh_host_ed25519_key at *activation* time, but that
 # activation runs before systemd would otherwise generate this key on
 # first boot (sshd-keygen is a normal systemd service gated behind
@@ -22,13 +18,9 @@
 # new machine.
 set -euo pipefail

-repo_root="$(cd "$(dirname "$0")/../.." && pwd)"
-# shellcheck source=../env.sh
-source "${repo_root}/scripts/env.sh"
-# shellcheck source=../lib/ssh-host-keys.sh
-source "${repo_root}/scripts/lib/ssh-host-keys.sh"
+repo_root="$(cd "$(dirname "$0")/.." && pwd)"

-hostname="${1:?usage: scripts/secrets/prepare-host-key.sh <hostname>}"
+hostname="${1:?usage: scripts/prepare-host-key.sh <hostname>}"
 sops_yaml="${repo_root}/.sops.yaml"

 if [[ ! -f "$sops_yaml" ]]; then
@@ -45,10 +37,9 @@ if [[ -f "$keyfile" ]]; then
  exit 1
 fi

-nix_extra_opts
-generate_host_ed25519_key "$hostname" "$keyfile"
+nix-shell -p openssh --run "ssh-keygen -t ed25519 -N '' -C '${hostname}' -f '${keyfile}'" >/dev/null

-age_pub="$(ssh_pubkey_to_age "${keyfile}.pub")"
+age_pub="$(nix-shell -p ssh-to-age --run "ssh-to-age -i '${keyfile}.pub'")"

 cat <<EOF

@@ -71,8 +62,8 @@ Generated: ${keyfile}(.pub)
  a) Rebuild the installer image with all host-keys/ baked in (see
     docs/auto-installer.md):
       NIXOS_HOST_KEYS_DIR="${keydir}" nix build .#iso --impure
-     (or .#pxe — --impure is required since host-keys/ is gitignored and
-     flakes can't see it otherwise)
+     (or .#lxc / .#pxe / .#all — --impure is required since host-keys/
+     is gitignored and flakes can't see it otherwise)

  b) Or, for an image already built without keys, scp it in after boot:
       scp ${keyfile}{,.pub} root@<target-ip>:/root/host-keys/
@@ -1,182 +0,0 @@
-#!/usr/bin/env bash
-# Points a non-NixOS Debian machine's Nix install at nix-cache: adds it as
-# a substituter (with cache.nixos.org kept as fallback) and, once the
-# remote-builder private key is installed, as a distributed-build machine
-# too.
-#
-# This is the non-NixOS equivalent of modules/nix-cache/client.nix +
-# modules/nix-cache/remote-builder-client.nix -- those two only apply to
-# hosts built from this flake. A plain Debian box with Nix installed
-# (single- or multi-user install, nix-daemon running) has no NixOS module
-# system to pick that config up, so this edits /etc/nix/nix.conf by hand
-# instead. Run this ON the target Debian machine, as root.
-#
-# The values below mirror variables.nix / modules/nix-cache/client.nix in
-# this repo -- update both if nix-cache is ever rebuilt with a new host
-# key or the cache signing key is rotated (see docs/nix-cache.md).
-#
-# REMOTE_BUILDER_KEY defaults to this machine's own default root SSH
-# identity (matches modules/nix-cache/remote-builder-client.nix's
-# convention for real NixOS clients: authenticate as nixremote with the
-# host's own default key, added individually to
-# vars.remoteBuilderAuthorizedKeys, rather than a separately-named or
-# shared keypair) -- generate one with
-# `ssh-keygen -t ed25519 -N '' -f /root/.ssh/id_ed25519` if this machine
-# doesn't have one yet, then add its .pub to vars.remoteBuilderAuthorizedKeys
-# and rebuild nix-cache.
-#
-# Usage:
-#   sudo ./configure-nix-cache-client.sh [--dry-run] [--no-remote-builder] [--no-restart]
-#
-# Env overrides (defaults match variables.nix):
-#   NIX_CACHE_HOST, NIX_CACHE_HOST_KEY, REMOTE_BUILDER_USER, REMOTE_BUILDER_KEY
-
-set -euo pipefail
-
-: "${NIX_CACHE_HOST:=nix-cache}"
-: "${NIX_CACHE_HOST_KEY:=ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPeWgMsdaiz4axT/deFc1+0B5bN+GX/NOeW9bbQ0c/IT lxc-nix-cache}"
-: "${REMOTE_BUILDER_USER:=nixremote}"
-: "${REMOTE_BUILDER_KEY:=/root/.ssh/id_ed25519}"
-
-CACHE_PUB_KEY="cache.local-1:usoWYanY3Kpq2+kDIS2nhWoLZiRxanmdysdzqCFBHW4="
-FALLBACK_URL="https://cache.nixos.org/"
-FALLBACK_PUB_KEY="cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
-
-NIX_CONF="/etc/nix/nix.conf"
-KNOWN_HOSTS="/etc/ssh/ssh_known_hosts"
-MARKER_BEGIN="# BEGIN nix-cache client config (configure-nix-cache-client.sh)"
-MARKER_END="# END nix-cache client config"
-
-dry_run=0
-with_remote_builder=1
-restart_daemon=1
-
-for arg in "$@"; do
-  case "$arg" in
-    --dry-run) dry_run=1 ;;
-    --no-remote-builder) with_remote_builder=0 ;;
-    --no-restart) restart_daemon=0 ;;
-    -h|--help)
-      sed -n '2,20p' "$0"
-      exit 0
-      ;;
-    *)
-      echo "ERROR: unknown argument: $arg" >&2
-      exit 1
-      ;;
-  esac
-done
-
-if [[ "$dry_run" -eq 0 && "$EUID" -ne 0 ]]; then
-  echo "ERROR: must run as root (writes $NIX_CONF and, unless --no-remote-builder, $KNOWN_HOSTS)." >&2
-  exit 1
-fi
-
-if ! command -v nix >/dev/null 2>&1; then
-  echo "ERROR: no 'nix' binary on PATH -- install the Nix package manager first." >&2
-  exit 1
-fi
-
-if [[ ! -f "$NIX_CONF" ]]; then
-  echo "ERROR: $NIX_CONF not found -- expected an existing multi-user Nix install." >&2
-  exit 1
-fi
-
-builder_line=""
-if [[ "$with_remote_builder" -eq 1 ]]; then
-  if [[ -f "$REMOTE_BUILDER_KEY" ]]; then
-    case "$(uname -m)" in
-      x86_64) nix_system="x86_64-linux" ;;
-      aarch64) nix_system="aarch64-linux" ;;
-      *)
-        echo "WARNING: unrecognized architecture '$(uname -m)' -- skipping remote builder, keeping substituter config." >&2
-        with_remote_builder=0
-        ;;
-    esac
-    if [[ "$with_remote_builder" -eq 1 ]]; then
-      builder_line="builders = ssh://${REMOTE_BUILDER_USER}@${NIX_CACHE_HOST} ${nix_system} ${REMOTE_BUILDER_KEY} 4 2 big-parallel,kvm,nixos-test,benchmark"
-    fi
-  else
-    echo "WARNING: $REMOTE_BUILDER_KEY not found -- skipping remote builder config (substituter still configured)." >&2
-    echo "  See docs/nix-cache.md 'Remote builder SSH keys' for how to install it, then re-run this script." >&2
-    with_remote_builder=0
-  fi
-fi
-
-block="$(cat <<EOF
-$MARKER_BEGIN
-extra-substituters = http://${NIX_CACHE_HOST} ${FALLBACK_URL}
-extra-trusted-public-keys = ${CACHE_PUB_KEY} ${FALLBACK_PUB_KEY}
-EOF
-)"
-if [[ "$with_remote_builder" -eq 1 ]]; then
-  block="${block}
-builders-use-substitutes = true
-${builder_line}"
-fi
-block="${block}
-$MARKER_END"
-
-echo "== nix.conf block to install =="
-echo "$block"
-echo "================================"
-
-if [[ "$dry_run" -eq 1 ]]; then
-  echo "(--dry-run: not writing $NIX_CONF)"
-else
-  tmp_conf="$(mktemp)"
-  trap 'rm -f "$tmp_conf"' EXIT
-
-  if grep -qF "$MARKER_BEGIN" "$NIX_CONF"; then
-    awk -v begin="$MARKER_BEGIN" -v end="$MARKER_END" -v block="$block" '
-      $0 == begin { print block; skip = 1; next }
-      $0 == end   { skip = 0; next }
-      skip        { next }
-      { print }
-    ' "$NIX_CONF" > "$tmp_conf"
-  else
-    cp "$NIX_CONF" "$tmp_conf"
-    printf '\n%s\n' "$block" >> "$tmp_conf"
-  fi
-
-  cp "$NIX_CONF" "${NIX_CONF}.bak.$(date +%Y%m%d%H%M%S)"
-  install -m 0644 "$tmp_conf" "$NIX_CONF"
-  echo "Updated $NIX_CONF (backup saved alongside it)."
-fi
-
-if [[ "$with_remote_builder" -eq 1 ]]; then
-  known_hosts_line="${NIX_CACHE_HOST} ${NIX_CACHE_HOST_KEY}"
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "(--dry-run: would ensure this line is present in $KNOWN_HOSTS)"
-    echo "  $known_hosts_line"
-  else
-    mkdir -p "$(dirname "$KNOWN_HOSTS")"
-    touch "$KNOWN_HOSTS"
-    if ! grep -qF "$known_hosts_line" "$KNOWN_HOSTS" 2>/dev/null; then
-      echo "$known_hosts_line" >> "$KNOWN_HOSTS"
-      echo "Added nix-cache's SSH host key to $KNOWN_HOSTS."
-    fi
-  fi
-fi
-
-if [[ "$dry_run" -eq 0 && "$restart_daemon" -eq 1 ]]; then
-  if command -v systemctl >/dev/null 2>&1 && systemctl is-active --quiet nix-daemon 2>/dev/null; then
-    systemctl restart nix-daemon
-    echo "Restarted nix-daemon to pick up the new config."
-  else
-    echo "nix-daemon not managed by systemd (or not running) -- restart it manually to pick up the new config."
-  fi
-fi
-
-cat <<EOF
-
-Done. Verify with:
-  curl http://${NIX_CACHE_HOST}/nix-cache-info
-  nix show-config | grep -E 'substituters|trusted-public-keys|builders'
-EOF
-if [[ "$with_remote_builder" -eq 1 ]]; then
-  cat <<EOF
-  ssh -i ${REMOTE_BUILDER_KEY} ${REMOTE_BUILDER_USER}@${NIX_CACHE_HOST} nix-store --version
-  nix build nixpkgs#hello -L
-EOF
-fi
@@ -1,836 +0,0 @@
-#!/usr/bin/env bash
-# Creates new Proxmox VMs/LXC containers from this flake, and reconfigures
-# existing ones -- the manual workflows in docs/proxmox-images.md (VM) and
-# docs/auto-installer.md's "LXC hosts" section (container), automated.
-#
-# Images are built directly on the Proxmox node (PROXMOX_REMOTE_REPO_DIR /
-# --remote-repo-dir in scripts/env.sh), not on whatever machine runs this
-# script -- there's no multi-gigabyte image to transfer afterward. The first
-# time a node doesn't have that repo path yet, it's bootstrapped: cloned from
-# this checkout's own `origin` remote, then scripts/codex-setup.sh installs
-# the build tooling (Nix, etc.). Every run after that just `git pull`s it and
-# copies over the locally-managed host-keys/ (gitignored, so a git pull
-# alone wouldn't carry it) before building.
-#
-# Usage:
-#   scripts/proxmox/create-proxmox-resource.sh --type lxc|vm --host <name> [options]
-#   scripts/proxmox/create-proxmox-resource.sh --type lxc|vm --list
-#   scripts/proxmox/create-proxmox-resource.sh --modify --vmid <n> [--cores N] [--memory MB] [--grow-disk GB]
-#
-# SAFETY:
-#   - The default (create) mode only ever creates a NEW resource -- it
-#     refuses to run if the target VMID already exists on the node, or if
-#     a VM/CT identified as --host already exists under any other VMID
-#     (checked live against the node; --allow-duplicate-host overrides).
-#   - --allow-duplicate-host distinguishes an exact match (same --type
-#     *and* --host, e.g. re-running --type lxc --host docker while an
-#     lxc-docker container already exists -- almost always a redeploy of
-#     the same target to pick up a rebuilt image) from a cross-type match
-#     (a different platform sharing the same host identity, e.g. a
-#     proxmox-docker VM coexisting with lxc-docker). Only the exact match
-#     is destroyed and replaced, after typing the hostname back to
-#     confirm (outside --dry-run) -- a cross-type match is always left
-#     untouched, matching-or-not.
-#   - --modify only ever touches a resource you name explicitly via
-#     --vmid, shows exactly what will change first, and (outside
-#     --dry-run) always requires typing that VMID back to confirm before
-#     anything is sent to the node. There is no bulk/implicit modify.
-#   - Outside of --allow-duplicate-host's exact-match replace above,
-#     neither mode can start/stop/delete a resource.
-#
-# See --help for the full option list.
-set -euo pipefail
-
-repo_root="$(cd "$(dirname "$0")/../.." && pwd)"
-# shellcheck source=../env.sh
-source "${repo_root}/scripts/env.sh"
-# shellcheck source=../lib/nix-eval.sh
-source "${repo_root}/scripts/lib/nix-eval.sh"
-# shellcheck source=../lib/confirm.sh
-source "${repo_root}/scripts/lib/confirm.sh"
-
-sync_keys="${repo_root}/scripts/secrets/sync-host-keys.sh"
-
-usage() {
-  cat <<EOF
-Usage: $0 --type lxc|vm --host <name> [options]      (create)
-       $0 --type lxc|vm --list                        (list --host values)
-       $0 --modify --vmid <n> [options]                (reconfigure)
-
-Create mode (default):
-  --type lxc|vm        lxc = container, built as a CT template tarball.
-                        vm  = VM, built as a Disko .raw disk image (UEFI/OVMF).
-  --host <name>         Which host identity to deploy -- matches
-                        config.networking.hostName (server, docker,
-                        nix-cache, nixos, pxe-boot, nix-minimal). Use
-                        --list to see what's available for --type.
-  --name <name>          Proxmox display name/hostname (default: --host's
-                          value, e.g. nix-cache -- for lxc this becomes the
-                          guest's real networking.hostName too, since
-                          proxmoxLXC.manageHostName pulls it from Proxmox's
-                          own container config, so it must match host.nix
-                          regardless of build type)
-  --vmid <n>              Numeric VMID (default: next free, via
-                          \`pvesh get /cluster/nextid\` on the node).
-                          Refuses to run if this ID already exists.
-  --disk-size <GB>           lxc only: rootfs size for \`pct create\`
-                              (default: \$PROXMOX_DEFAULT_LXC_DISK_GB, ${PROXMOX_DEFAULT_LXC_DISK_GB}).
-  --image <path>              Use this local image/tarball (uploaded to the
-                              node via scp) instead of checking the node /
-                              building one there from the flake.
-  --force-rebuild                Skip the "does the node already have this
-                                  image" check -- always build fresh and
-                                  overwrite what's there.
-  --remote-repo-dir <path>       Where this flake repo lives (or gets
-                                  cloned) on the node, and is built from
-                                  (default: \$PROXMOX_REMOTE_REPO_DIR, ${PROXMOX_REMOTE_REPO_DIR}).
-  --allow-duplicate-host        Required if a VM/CT identified as --host
-                                already exists on the node (checked live via
-                                qm/pct, not any file in this repo) --
-                                otherwise refused, since it'd share that
-                                host's hostName/hostId. An existing resource
-                                of this *same* --type (e.g. re-running --type
-                                lxc --host docker over an existing lxc-docker)
-                                is destroyed and replaced, after confirming --
-                                a different --type sharing the same --host
-                                (e.g. a proxmox-docker VM) is always left
-                                untouched.
-
-Modify mode (reconfigure an EXISTING resource -- requires --modify):
-  --modify                Switch to modify mode.
-  --vmid <n>                Required: which existing resource to change.
-                            Type/VM-vs-CT is auto-detected on the node.
-  --grow-disk <GB>            Grow the primary disk by this many GB
-                              (qm/pct resize; Proxmox only supports
-                              growing, never shrinking, an existing disk).
-  At least one of --cores / --memory / --grow-disk is required. Always
-  prints the current -> new values and requires typing the VMID back to
-  confirm, even outside --dry-run.
-
-Shared:
-  --cores <n>              create: default \$PROXMOX_DEFAULT_CORES (${PROXMOX_DEFAULT_CORES}).
-                            modify: omit to leave unchanged.
-  --memory <MB>              create: default \$PROXMOX_DEFAULT_MEMORY_MB (${PROXMOX_DEFAULT_MEMORY_MB}).
-                              modify: omit to leave unchanged.
-  --swap <MB>                 lxc only, create time: \`--memory\` doesn't
-                              touch swap -- it silently stays at Proxmox's
-                              own 512M default otherwise. (default: matches
-                              whatever --memory resolves to)
-  --storage <pool>              (default: \$PROXMOX_STORAGE, ${PROXMOX_STORAGE})
-  --iso-storage <pool>            (default: \$PROXMOX_ISO_STORAGE, ${PROXMOX_ISO_STORAGE})
-  --bridge <bridge>                (default: \$PROXMOX_BRIDGE, ${PROXMOX_BRIDGE})
-  --node <host>                     Proxmox node to SSH into (default:
-                                    \$PROXMOX_HOST, ${PROXMOX_HOST})
-  --dry-run                           Print the full plan; touch nothing
-                                      local or remote, no prompts.
-  -h, --help
-
-Config for --storage/--bridge/--node/etc. lives in scripts/env.sh -- edit
-that instead of passing the same flag every time.
-EOF
-}
-
-dry_run=0
-modify=0
-type=""
-host=""
-name=""
-vmid=""
-cores=""
-memory=""
-swap=""
-disk_size=""
-grow_disk=""
-image=""
-storage="$PROXMOX_STORAGE"
-iso_storage="$PROXMOX_ISO_STORAGE"
-bridge="$PROXMOX_BRIDGE"
-node="$PROXMOX_HOST"
-remote_repo_dir="$PROXMOX_REMOTE_REPO_DIR"
-do_list=0
-allow_duplicate_host=0
-force_rebuild=0
-
-while [[ $# -gt 0 ]]; do
-  case "$1" in
-  --type) type="$2"; shift 2 ;;
-  --host) host="$2"; shift 2 ;;
-  --name) name="$2"; shift 2 ;;
-  --vmid) vmid="$2"; shift 2 ;;
-  --cores) cores="$2"; shift 2 ;;
-  --memory) memory="$2"; shift 2 ;;
-  --swap) swap="$2"; shift 2 ;;
-  --disk-size) disk_size="$2"; shift 2 ;;
-  --grow-disk) grow_disk="$2"; shift 2 ;;
-  --image) image="$2"; shift 2 ;;
-  --storage) storage="$2"; shift 2 ;;
-  --iso-storage) iso_storage="$2"; shift 2 ;;
-  --bridge) bridge="$2"; shift 2 ;;
-  --node) node="$2"; shift 2 ;;
-  --remote-repo-dir) remote_repo_dir="$2"; shift 2 ;;
-  --list) do_list=1; shift ;;
-  --allow-duplicate-host) allow_duplicate_host=1; shift ;;
-  --force-rebuild) force_rebuild=1; shift ;;
-  --modify) modify=1; shift ;;
-  --dry-run) dry_run=1; shift ;;
-  -h | --help) usage; exit 0 ;;
-  *) echo "Unknown option: $1" >&2; usage >&2; exit 1 ;;
-  esac
-done
-
-ssh_target="${PROXMOX_SSH_USER}@${node}"
-
-remote() {
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] ssh ${ssh_target} -- $*"
-  else
-    ssh "$ssh_target" "$@"
-  fi
-}
-
-# ============================================================ modify mode
-cmd_modify() {
-  if [[ -z "$vmid" ]]; then
-    echo "ERROR: --modify requires --vmid." >&2
-    exit 1
-  fi
-  if [[ -z "$cores" && -z "$memory" && -z "$grow_disk" ]]; then
-    echo "ERROR: --modify needs at least one of --cores / --memory / --grow-disk." >&2
-    exit 1
-  fi
-
-  echo "Looking up VMID ${vmid} on ${node}..."
-  local kind current_cores current_memory disk_key
-  if ssh "$ssh_target" "qm status ${vmid}" >/dev/null 2>&1; then
-    kind="vm"
-    disk_key="scsi0"
-  elif ssh "$ssh_target" "pct status ${vmid}" >/dev/null 2>&1; then
-    kind="lxc"
-    disk_key="rootfs"
-  else
-    echo "ERROR: VMID ${vmid} doesn't exist on ${node} -- nothing to modify." >&2
-    exit 1
-  fi
-
-  local config_cmd="qm config ${vmid}"
-  [[ "$kind" == "lxc" ]] && config_cmd="pct config ${vmid}"
-  local current_config
-  current_config="$(ssh "$ssh_target" "$config_cmd")"
-  current_cores="$(echo "$current_config" | grep -oP '^cores:\s*\K\S+' || echo '?')"
-  current_memory="$(echo "$current_config" | grep -oP '^memory:\s*\K\S+' || echo '?')"
-
-  echo
-  echo "VMID ${vmid} is a ${kind} on ${node}. Planned changes:"
-  [[ -n "$cores" ]] && echo "  cores:  ${current_cores} -> ${cores}"
-  [[ -n "$memory" ]] && echo "  memory: ${current_memory} MB -> ${memory} MB"
-  [[ -n "$grow_disk" ]] && echo "  ${disk_key}: grow by +${grow_disk}G (Proxmox can only grow, not shrink, an existing disk)"
-
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo
-    echo "[dry-run] Nothing was changed."
-    return
-  fi
-
-  echo
-  if ! confirm_typed "$vmid" "Type the VMID (${vmid}) to confirm these changes: "; then
-    echo "Cancelled -- input didn't match ${vmid}."
-    exit 1
-  fi
-
-  local set_cmd="qm set"
-  local resize_cmd="qm resize"
-  [[ "$kind" == "lxc" ]] && set_cmd="pct set" && resize_cmd="pct resize"
-
-  if [[ -n "$cores" || -n "$memory" ]]; then
-    local args=""
-    [[ -n "$cores" ]] && args="${args} --cores ${cores}"
-    [[ -n "$memory" ]] && args="${args} --memory ${memory}"
-    remote "${set_cmd} ${vmid}${args}"
-  fi
-  if [[ -n "$grow_disk" ]]; then
-    remote "${resize_cmd} ${vmid} ${disk_key} +${grow_disk}G"
-  fi
-
-  echo
-  echo "Done. VMID ${vmid} updated."
-}
-
-if [[ "$modify" -eq 1 ]]; then
-  cmd_modify
-  exit 0
-fi
-
-# ============================================================= create mode
-if [[ "$type" != "lxc" && "$type" != "vm" ]]; then
-  echo "ERROR: --type must be 'lxc' or 'vm'." >&2
-  usage >&2
-  exit 1
-fi
-
-platform_prefix="lxc"
-[[ "$type" == "vm" ]] && platform_prefix="proxmox"
-[[ -z "$cores" ]] && cores="$PROXMOX_DEFAULT_CORES"
-[[ -z "$memory" ]] && memory="$PROXMOX_DEFAULT_MEMORY_MB"
-
-# --- discover / resolve the flake target from --host --------------------
-# Emits "<target>\t<hostName>" pairs for every ${platform_prefix}-* flake
-# target -- the one source both --list and the --host lookup below read
-# from, so they can never see a different set of targets from each other.
-targets_for_platform() {
-  local target
-  for target in $(list_flake_targets "$repo_root" 2>/dev/null | grep -- "^${platform_prefix}-"); do
-    printf '%s\t%s\n' "$target" "$(flake_target_hostname "$repo_root" "$target")"
-  done
-}
-
-list_hosts() {
-  local target hostname
-  while IFS=$'\t' read -r target hostname; do
-    printf '  %-12s -> %s\n' "$hostname" "$target"
-  done < <(targets_for_platform)
-}
-
-if [[ "$do_list" -eq 1 ]]; then
-  echo "Available --host values for --type ${type}:"
-  list_hosts
-  exit 0
-fi
-
-if [[ -z "$host" ]]; then
-  echo "ERROR: --host is required (or use --list to see options)." >&2
-  exit 1
-fi
-
-flake_target=""
-while IFS=$'\t' read -r target hostname; do
-  if [[ "$hostname" == "$host" ]]; then
-    flake_target="$target"
-    break
-  fi
-done < <(targets_for_platform)
-
-if [[ -z "$flake_target" ]]; then
-  echo "ERROR: no ${platform_prefix}-* target has hostName '${host}'." >&2
-  echo "Available:" >&2
-  list_hosts >&2
-  exit 1
-fi
-
-# The container/VM's real identity is --host (e.g. "nix-cache"), validated
-# above against config.networking.hostName -- not the flake target name
-# (e.g. "lxc-nix-cache"), which is build-type-specific and only exists to
-# pick which platform variant to build. Defaulting --name to the flake
-# target would make lxc's --hostname (which proxmoxLXC.manageHostName
-# feeds straight into the guest's real hostname) disagree with host.nix.
-[[ -z "$name" ]] && name="$host"
-
-# --- refuse to duplicate a host that's already live on the node ---------
-# Queries the node itself (qm/pct's own name/hostname config), not any
-# static list in this repo -- a file can't track whether a resource still
-# actually exists, and this used to be checked against variables.nix's
-# deployedTargets, which drifted stale (it kept naming a VM as "the real
-# deployment" well after that VM had been destroyed, blocking its own
-# redeploy) until that list was dropped in favour of this live check. This
-# only catches guests identified with the default --name (== --host, what
-# this script itself always uses unless --name is overridden) -- a guest
-# manually renamed on the node afterwards wouldn't match, but nothing here
-# creates guests that way.
-if [[ "$dry_run" -eq 1 ]]; then
-  echo
-  echo "[dry-run] would check ${node} for an existing VM/CT identified as '${host}'"
-  if [[ "$allow_duplicate_host" -eq 1 ]]; then
-    echo "[dry-run] --allow-duplicate-host: an existing ${type} named '${host}' would be" \
-      "destroyed and replaced; a different-type match would be left untouched"
-  fi
-else
-  echo
-  echo "==> Checking ${node} for an existing VM/CT identified as '${host}'..."
-  ssh_check_status=0
-  existing="$(ssh "$ssh_target" bash -s -- "$host" <<'REMOTE_SCRIPT'
-target="$1"
-for id in $(qm list 2>/dev/null | awk 'NR>1{print $1}'); do
-  n="$(qm config "$id" 2>/dev/null | grep -oP '^name:\s*\K\S+' || true)"
-  [[ "$n" == "$target" ]] && echo "vm ${id} ${n}"
-done
-for id in $(pct list 2>/dev/null | awk 'NR>1{print $1}'); do
-  n="$(pct config "$id" 2>/dev/null | grep -oP '^hostname:\s*\K\S+' || true)"
-  [[ "$n" == "$target" ]] && echo "lxc ${id} ${n}"
-done
-exit 0
-REMOTE_SCRIPT
-  )" || ssh_check_status=$?
-  if [[ "$ssh_check_status" -ne 0 ]]; then
-    echo "ERROR: couldn't reach ${node} (ssh exited ${ssh_check_status}) to check for an" >&2
-    echo "existing '${host}' resource -- refusing to guess. Fix connectivity and retry," >&2
-    echo "or pass --allow-duplicate-host if you're sure none exists (this skips the" >&2
-    echo "check entirely)." >&2
-    exit 1
-  fi
-
-  # Split into "exact" (same resource kind as --type -- i.e. literally this
-  # same host+platform combo already exists, almost always a redeploy of
-  # the same target to test a rebuilt image) vs "cross-type" (a different
-  # platform sharing this host identity, e.g. a stopped proxmox-docker VM
-  # coexisting with an lxc-docker container -- a deliberate, valid setup
-  # this script has never managed and still won't). Read via a herestring
-  # (not a pipe) so the appends below survive outside the loop.
-  this_kind="$type"
-  exact_matches=""
-  cross_matches=""
-  if [[ -n "$existing" ]]; then
-    while read -r kind id n; do
-      [[ -z "$kind" ]] && continue
-      if [[ "$kind" == "$this_kind" ]]; then
-        exact_matches+="${kind} ${id} ${n}"$'\n'
-      else
-        cross_matches+="${kind} ${id} ${n}"$'\n'
-      fi
-    done <<<"$existing"
-  fi
-
-  if [[ -n "$exact_matches" && "$allow_duplicate_host" -ne 1 ]]; then
-    echo "ERROR: '${host}' already exists on ${node} as this same resource type:" >&2
-    echo "$exact_matches" | while read -r kind id n; do
-      [[ -z "$kind" ]] && continue
-      echo "  - ${kind} VMID ${id} (${n})" >&2
-    done
-    echo "Refusing to create a second ${this_kind} sharing this identity. Pass" >&2
-    echo "--allow-duplicate-host to destroy it and create a fresh one in its place" >&2
-    echo "(after confirming), or use --modify to reconfigure the existing one instead." >&2
-    exit 1
-  fi
-
-  if [[ -n "$cross_matches" && "$allow_duplicate_host" -ne 1 ]]; then
-    echo "ERROR: '${host}' already exists on ${node} as a different resource type:" >&2
-    echo "$cross_matches" | while read -r kind id n; do
-      [[ -z "$kind" ]] && continue
-      echo "  - ${kind} VMID ${id} (${n})" >&2
-    done
-    echo "Refusing to create a second resource sharing this identity. Pass" >&2
-    echo "--allow-duplicate-host to create one anyway (it gets its own distinct" >&2
-    echo "sops key and VMID -- the existing resource above is left untouched)," >&2
-    echo "or use --modify to reconfigure the existing one instead." >&2
-    exit 1
-  fi
-
-  if [[ -n "$cross_matches" ]]; then
-    echo "--allow-duplicate-host: '${host}' also exists on ${node} as a different resource" \
-      "type -- leaving it untouched:"
-    echo "$cross_matches" | while read -r kind id n; do
-      [[ -z "$kind" ]] && continue
-      echo "  - ${kind} VMID ${id} (${n})"
-    done
-  fi
-
-  if [[ -n "$exact_matches" ]]; then
-    echo "--allow-duplicate-host: '${host}' already exists on ${node} as this same resource" \
-      "type -- it will be destroyed and replaced:"
-    echo "$exact_matches" | while read -r kind id n; do
-      [[ -z "$kind" ]] && continue
-      echo "  - ${kind} VMID ${id} (${n})"
-    done
-    echo
-    if ! confirm_typed "$host" "Type the hostname (${host}) to confirm destroying the above and replacing it: "; then
-      echo "Cancelled -- input didn't match ${host}." >&2
-      exit 1
-    fi
-    echo "$exact_matches" | while read -r kind id n; do
-      [[ -z "$kind" ]] && continue
-      echo "==> Destroying ${kind} VMID ${id} (${n})..."
-      if [[ "$kind" == "vm" ]]; then
-        # qm destroy has no --force to stop-then-destroy in one call (pct's
-        # does) -- stop explicitly first if it's running.
-        if ssh "$ssh_target" "qm status ${id}" 2>/dev/null | grep -q running; then
-          ssh "$ssh_target" "qm stop ${id}"
-        fi
-        ssh "$ssh_target" "qm destroy ${id} --purge 1"
-      else
-        ssh "$ssh_target" "pct destroy ${id} --force 1 --purge 1"
-      fi
-    done
-  fi
-fi
-
-echo "Target: ${flake_target} (host=${host}, type=${type}) -> Proxmox resource '${name}'"
-
-# Decide on nix-cache once, here -- this is the earliest point that needs
-# it (sync-host-keys.sh below needs nix-shell packages regardless of
-# whether an image ends up getting built later), and the decision is
-# exported so that subprocess -- and this script's own later build step,
-# if it gets there -- both reuse it instead of probing again.
-nix_extra_opts
-
-# --- make sure this target has a registered host key --------------------
-echo
-echo "==> Ensuring host key exists and is registered..."
-sync_args=("$flake_target")
-[[ "$dry_run" -eq 1 ]] && sync_args+=(--dry-run)
-bash "$sync_keys" "${sync_args[@]}"
-
-# --- VMID: pick one, and refuse to touch anything that already exists ---
-echo
-if [[ -z "$vmid" ]]; then
-  if [[ "$dry_run" -eq 1 ]]; then
-    vmid="<next-free-vmid>"
-    echo "[dry-run] would ask ${node} for the next free VMID (pvesh get /cluster/nextid)"
-  else
-    vmid="$(ssh "$ssh_target" "pvesh get /cluster/nextid" | tr -d '[:space:]')"
-    echo "Auto-assigned VMID: ${vmid}"
-  fi
-else
-  echo "Requested VMID: ${vmid}"
-fi
-
-if [[ "$dry_run" -eq 0 ]]; then
-  # qm/pct status exits non-zero (and prints "does not exist") for a free
-  # ID on that resource type -- but a VMID could exist as the OTHER
-  # resource type (e.g. requested a CT id that's actually a VM), so check
-  # both. Any success here means something is already using this ID --
-  # refuse to go anywhere near it. (Reconfiguring an existing resource is
-  # --modify's job, not this one's.)
-  if ssh "$ssh_target" "qm status ${vmid}" >/dev/null 2>&1 \
-    || ssh "$ssh_target" "pct status ${vmid}" >/dev/null 2>&1; then
-    echo "ERROR: VMID ${vmid} already exists on ${node}. Refusing to touch an" >&2
-    echo "existing resource here -- use --modify to reconfigure it, pick a" >&2
-    echo "different --vmid, or omit it to auto-assign." >&2
-    exit 1
-  fi
-fi
-
-# --- resolve the remote path -- fixed naming (not the nix store's own
-# derivation-hash-based filename), so a later run can check for it by name.
-# lxc uploads as a CT *template* (Proxmox's "vztmpl" content type, under
-# iso_storage) -- config.system.build.tarball is a plain rootfs tarball,
-# not a vzdump backup archive, so it's created with `pct create ... vztmpl`,
-# not restored with `pct restore` (that expects backup-archive metadata
-# this tarball doesn't have, and fails with "archive contains no
-# configuration file").
-remote_dir="/var/lib/vz/import"
-remote_filename="${flake_target}.raw"
-if [[ "$type" == "lxc" ]]; then
-  remote_dir="/var/lib/vz/template/cache"
-  remote_filename="${flake_target}.tar.xz"
-fi
-remote_path="${remote_dir}/${remote_filename}"
-
-# --- ensure the flake repo (+ tooling) exists on the node, and is current --
-# Bootstraps once (git clone from this checkout's own `origin`, then
-# scripts/codex-setup.sh installs Nix + friends) if ${remote_repo_dir}
-# doesn't exist yet on the node; otherwise just `git pull`s it, so the image
-# built there reflects what's actually committed and pushed. Only called
-# right before an actual remote build below -- reusing an image already on
-# the node, or an explicit --image, never touch the node's checkout at all.
-ensure_remote_repo() {
-  echo
-  echo "==> Ensuring ${remote_repo_dir} exists and is current on ${node}..."
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] would ensure ${remote_repo_dir} exists on ${node} (clone if missing, git pull if present), and would verify/bootstrap build tooling there (scripts/codex-setup.sh) if \`nix\` isn't already on PATH -- and if that bootstrap actually ran, would also configure ${node} as a nix-cache client (scripts/proxmox/configure-nix-cache-client.sh)"
-    return
-  fi
-
-  if ssh "$ssh_target" "test -d '${remote_repo_dir}/.git'"; then
-    echo "Repo present -- pulling latest..."
-    ssh "$ssh_target" "cd '${remote_repo_dir}' && git pull --ff-only"
-  else
-    local origin_url
-    origin_url="$(git -C "$repo_root" remote get-url origin 2>/dev/null || true)"
-    if [[ -z "$origin_url" ]]; then
-      echo "ERROR: ${remote_repo_dir} doesn't exist on ${node}, and this checkout has no" >&2
-      echo "'origin' remote to clone from. Set one (git remote add origin <url>) or create" >&2
-      echo "${remote_repo_dir} on ${node} yourself (e.g. git clone), then re-run." >&2
-      exit 1
-    fi
-    echo "Not present -- cloning from ${origin_url}..."
-    ssh "$ssh_target" "git clone '${origin_url}' '${remote_repo_dir}'"
-  fi
-
-  # Trivial check, run every time (not just right after a fresh clone) --
-  # confirmed live: a first bootstrap can clone the repo successfully and
-  # still leave the node without a working `nix` (e.g. the node had no
-  # `sudo`, which the Nix installer's root path depends on -- see the fix
-  # in scripts/codex-setup.sh), and a later run with the repo already
-  # present would otherwise never retry it. Sources
-  # scripts/lib/nix-bootstrap.sh's ensure_nix_profile first -- a
-  # single-user Nix install typically only gets sourced into login shells,
-  # and ssh's non-interactive command execution is neither, so a
-  # freshly-installed `nix` still wouldn't be on PATH here without it.
-  #
-  # Just `nix` today -- the only thing the remote build commands below
-  # actually invoke -- but a list (not a single hardcoded check) so a
-  # future remote step needing another tool can add itself here instead of
-  # growing a parallel check.
-  local remote_required_cmds=(nix)
-  local tooling_check_cmd="cd '${remote_repo_dir}' && . scripts/lib/nix-bootstrap.sh && ensure_nix_profile"
-  local cmd
-  for cmd in "${remote_required_cmds[@]}"; do
-    tooling_check_cmd="${tooling_check_cmd} && command -v ${cmd}"
-  done
-
-  if ssh "$ssh_target" "$tooling_check_cmd" >/dev/null 2>&1; then
-    echo "Build tooling already present on ${node}."
-  else
-    echo "==> Bootstrapping build tooling on ${node} (scripts/codex-setup.sh)..."
-    ssh "$ssh_target" "cd '${remote_repo_dir}' && bash scripts/codex-setup.sh"
-
-    # Only on this first-time bootstrap, not every run -- a node that
-    # already has tooling either already went through this once, or had
-    # it configured some other way, and re-running is harmless but
-    # pointless. Non-fatal: this only makes the node's own builds faster
-    # (substitute from nix-cache instead of building from source) and
-    # offloadable to it as a remote builder -- worth trying, not worth
-    # aborting the image build over if nix-cache happens to be down right
-    # now. Needs ensure_nix_profile first, same as the tooling_check_cmd
-    # above -- ssh's non-interactive command execution won't have picked
-    # up a freshly single-user-installed `nix` otherwise.
-    echo "==> Configuring ${node} as a nix-cache substituter/remote-builder client..."
-    if ! ssh "$ssh_target" "cd '${remote_repo_dir}' && . scripts/lib/nix-bootstrap.sh && ensure_nix_profile && bash scripts/proxmox/configure-nix-cache-client.sh"; then
-      echo "WARNING: configure-nix-cache-client.sh failed on ${node} -- continuing without it (${node} will build from source / against cache.nixos.org only)." >&2
-    fi
-  fi
-}
-
-# --- sync locally-managed host-keys/ to the node ---------------------------
-# Gitignored (see .gitignore), so `git pull` above never carries it -- both
-# build paths need it present as NIXOS_HOST_KEYS_DIR / --pre-format-files
-# input on the node itself now that the build runs there. scp (not rsync,
-# not already a dependency anywhere else in this repo) mirrors how this
-# script already transfers the --image case below.
-sync_remote_host_keys() {
-  echo
-  echo "==> Syncing host-keys/ to ${node}..."
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] would copy ${repo_root}/host-keys/ to ${ssh_target}:${remote_repo_dir}/host-keys/"
-    return
-  fi
-  ssh "$ssh_target" "mkdir -p '${remote_repo_dir}/host-keys'"
-  scp -pr "${repo_root}/host-keys/." "${ssh_target}:${remote_repo_dir}/host-keys/"
-}
-
-# --- build (or reuse an image already on the node) ------------------------
-echo
-local_image=""
-image_already_remote=0
-
-if [[ -n "$image" ]]; then
-  [[ -f "$image" ]] || { echo "ERROR: --image '${image}' not found." >&2; exit 1; }
-  local_image="$image"
-  echo "Using provided image: ${local_image}"
-elif [[ "$force_rebuild" -eq 1 ]]; then
-  echo "--force-rebuild: skipping the existing-image check on ${node}."
-else
-  echo "==> Checking whether ${node} already has ${remote_path}..."
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] would check: ssh ${ssh_target} -- test -f ${remote_path}"
-  elif ssh "$ssh_target" "test -f '${remote_path}'" 2>/dev/null; then
-    echo "Found it -- reusing, skipping build (use --force-rebuild to override)."
-    image_already_remote=1
-  else
-    echo "Not found -- will build."
-  fi
-fi
-
-if [[ "$image_already_remote" -eq 0 && -z "$local_image" ]]; then
-  ensure_remote_repo
-  sync_remote_host_keys
-
-  # Relayed into the remote build below exactly as decided by the local
-  # nix_extra_opts call earlier in this script -- that decision (whether
-  # nix-cache is reachable) is made once, locally, same as it always has
-  # been; only *where* the resulting "${NIX_OPTS[@]}" gets used as a `nix
-  # build` flag moves to the node. NIX_EXTRA_OPTS is already a %q-quoted
-  # string built for exactly this eval-based reconstruction (see env.sh).
-  nix_opts_display=""
-  if [[ ${#NIX_OPTS[@]} -gt 0 ]]; then
-    printf -v nix_opts_display '%q ' "${NIX_OPTS[@]}"
-    nix_opts_display=" ${nix_opts_display% }"
-  fi
-
-  if [[ "$type" == "lxc" ]]; then
-    if [[ "$dry_run" -eq 1 ]]; then
-      echo "[dry-run] would build on ${node}: NIXOS_HOST_KEYS_DIR=\$(pwd)/host-keys nix build --impure \\"
-      echo "[dry-run]   --no-use-registries --no-accept-flake-config${nix_opts_display} \\"
-      echo "[dry-run]   .#nixosConfigurations.${flake_target}.config.system.build.tarball"
-      echo "[dry-run] would stage the result at ${remote_path}"
-      local_image="<built-tarball>"
-    else
-      echo "==> Building LXC tarball for ${flake_target} on ${node}..."
-      # Built as a single already-%q-quoted command string, not separate ssh
-      # argv elements -- ssh joins remote command args with plain spaces and
-      # hands the result to the remote shell to re-split, which would
-      # otherwise scatter NIX_EXTRA_OPTS (itself several space-separated,
-      # %q-quoted tokens) across the wrong positional parameters below.
-      printf -v remote_cmd 'bash -s -- %q %q %q %q %q' \
-        "$remote_repo_dir" "$flake_target" "$remote_dir" "$remote_filename" "$NIX_EXTRA_OPTS"
-      ssh "$ssh_target" "$remote_cmd" <<'REMOTE_SCRIPT'
-set -euo pipefail
-repo_dir="$1"; target="$2"; dest_dir="$3"; dest_name="$4"; nix_extra_opts_str="$5"
-declare -a NIX_OPTS=()
-[[ -n "$nix_extra_opts_str" ]] && eval "NIX_OPTS=(${nix_extra_opts_str})"
-cd "$repo_dir"
-# A single-user Nix install only gets sourced into login shells; this ssh
-# session is neither, so `nix` wouldn't otherwise be on PATH here even
-# right after a successful install.
-. scripts/lib/nix-bootstrap.sh
-ensure_nix_profile
-NIXOS_HOST_KEYS_DIR="$(pwd)/host-keys" nix build --impure \
-  --no-use-registries --no-accept-flake-config "${NIX_OPTS[@]}" \
-  ".#nixosConfigurations.${target}.config.system.build.tarball" \
-  --out-link "result-${target}"
-built="$(find "result-${target}/tarball" -maxdepth 1 -type f | head -1)"
-if [[ -z "$built" ]]; then
-  echo "ERROR: no tarball found under result-${target}/tarball after build." >&2
-  exit 1
-fi
-mkdir -p "$dest_dir"
-cp "$built" "${dest_dir}/${dest_name}"
-echo "Built and staged: ${dest_dir}/${dest_name}"
-REMOTE_SCRIPT
-      local_image="$remote_path"
-      echo "Built on ${node}: ${remote_path}"
-    fi
-  else
-    # PROXMOX_SSH_USER defaults to root (env.sh), which needs no sudo and
-    # can't assume it's even installed on a minimal node -- only shell out
-    # through sudo when actually running as a non-root SSH user.
-    sudo_prefix="sudo"
-    sudo_display="sudo "
-    if [[ "$PROXMOX_SSH_USER" == "root" ]]; then
-      sudo_prefix=""
-      sudo_display=""
-    fi
-    if [[ "$dry_run" -eq 1 ]]; then
-      echo "[dry-run] would build on ${node}: nix build --no-use-registries --no-accept-flake-config${nix_opts_display} \\"
-      echo "[dry-run]   .#nixosConfigurations.${flake_target}.config.system.build.diskoImagesScript"
-      echo "[dry-run] would run:   ${sudo_display}./result-${flake_target} \\"
-      echo "[dry-run]                --pre-format-files host-keys/${flake_target}_ssh_host_ed25519_key /etc/ssh/ssh_host_ed25519_key \\"
-      echo "[dry-run]                --pre-format-files host-keys/${flake_target}_ssh_host_ed25519_key.pub /etc/ssh/ssh_host_ed25519_key.pub \\"
-      echo "[dry-run]                --build-memory 2048"
-      echo "[dry-run] would stage the result at ${remote_path}"
-      local_image="<built-image>.raw"
-    else
-      echo "==> Building Disko image for ${flake_target} on ${node}..."
-      # See the LXC branch above for why this is one %q-quoted command
-      # string rather than separate ssh argv elements.
-      printf -v remote_cmd 'bash -s -- %q %q %q %q %q %q' \
-        "$remote_repo_dir" "$flake_target" "$remote_dir" "$remote_filename" "$NIX_EXTRA_OPTS" "$sudo_prefix"
-      ssh "$ssh_target" "$remote_cmd" <<'REMOTE_SCRIPT'
-set -euo pipefail
-repo_dir="$1"; target="$2"; dest_dir="$3"; dest_name="$4"; nix_extra_opts_str="$5"; sudo_prefix="$6"
-declare -a NIX_OPTS=()
-[[ -n "$nix_extra_opts_str" ]] && eval "NIX_OPTS=(${nix_extra_opts_str})"
-cd "$repo_dir"
-. scripts/lib/nix-bootstrap.sh
-ensure_nix_profile
-nix build --no-use-registries --no-accept-flake-config "${NIX_OPTS[@]}" \
-  ".#nixosConfigurations.${target}.config.system.build.diskoImagesScript" \
-  --out-link "result-${target}"
-$sudo_prefix "./result-${target}" \
-  --pre-format-files "host-keys/${target}_ssh_host_ed25519_key" /etc/ssh/ssh_host_ed25519_key \
-  --pre-format-files "host-keys/${target}_ssh_host_ed25519_key.pub" /etc/ssh/ssh_host_ed25519_key.pub \
-  --build-memory 2048
-built="$(find . -maxdepth 1 -name '*.raw' -newer "result-${target}" | head -1)"
-if [[ -z "$built" ]]; then
-  echo "ERROR: no .raw image found in ${repo_dir} after build." >&2
-  exit 1
-fi
-mkdir -p "$dest_dir"
-mv "$built" "${dest_dir}/${dest_name}"
-echo "Built and staged: ${dest_dir}/${dest_name}"
-REMOTE_SCRIPT
-      local_image="$remote_path"
-      echo "Built on ${node}: ${remote_path}"
-    fi
-  fi
-fi
-
-# --- upload -- only for an explicit --image; a build above stages its
-# result directly at ${remote_path} on the node already, and reusing an
-# image already on the node needs nothing transferred either. ------------
-echo
-if [[ -n "$image" ]]; then
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] would upload: scp ${local_image} ${ssh_target}:${remote_path}"
-  else
-    echo "==> Uploading to ${node}:${remote_path}..."
-    ssh "$ssh_target" "mkdir -p ${remote_dir}"
-    scp "$local_image" "${ssh_target}:${remote_path}"
-  fi
-fi
-
-# --- create -----------------------------------------------------------------
-echo
-if [[ "$type" == "lxc" ]]; then
-  echo "==> Creating LXC container ${vmid} (${name})..."
-  local_disk_size="${disk_size:-$PROXMOX_DEFAULT_LXC_DISK_GB}"
-  # --memory doesn't touch swap -- it silently stays at Proxmox's own
-  # 512M default otherwise (confirmed live: --memory 2048 left swap at
-  # 512). Default to matching whatever --memory resolved to above.
-  local_swap="${swap:-$memory}"
-  # --unprivileged 1: modules/platforms/lxc.nix sets proxmoxLXC.privileged
-  # = false, so the NixOS config inside the image assumes it's running as
-  # an unprivileged container (cgroup/capability/mount expectations baked
-  # in at boot). `pct create`'s own CLI default for this flag is
-  # privileged (unlike the web UI, which defaults its checkbox the other
-  # way) -- leaving it unset creates a privileged container running a
-  # NixOS config that assumes unprivileged, a real mismatch.
-  #
-  # --features nesting=1,keyctl=1: required for a modern (v247+) systemd
-  # guest to actually boot unprivileged -- confirmed live: without this,
-  # AppArmor denies the nested user namespaces and credential mounts
-  # systemd routinely uses (even plain getty units), and every getty
-  # crash-loops on a denied mount every ~3s (visible as garbage on the
-  # console) while core services like nsncd fail the same way.
-  #
-  # ...,mount=nfs;nfs4: without it AppArmor blanket-denies the `nfs`/
-  # `rpc_pipefs` mount syscalls any NFS client share needs -- confirmed
-  # live on lxc-docker: `mount: /var/lib/nfs/rpc_pipefs: permission
-  # denied`. The value's `;` (Proxmox's own multi-fstype separator for
-  # this one feature, per PVE::LXC's use of PVE::ParseUtils::split_list)
-  # must stay single-quoted here: create_cmd is sent to `remote()`, which
-  # hands the whole string to `ssh` as a single command for the *remote*
-  # shell to parse -- unquoted, that `;` would be read as a remote
-  # command separator and silently truncate this into two commands.
-  create_cmd="pct create ${vmid} ${iso_storage}:vztmpl/${remote_filename} --unprivileged 1 --features '${PROXMOX_DEFAULT_LXC_FEATURES}' --rootfs ${storage}:${local_disk_size} --hostname ${name} --cores ${cores} --memory ${memory} --swap ${local_swap} --net0 name=eth0,bridge=${bridge},ip=dhcp"
-  remote "$create_cmd"
-  remote "pct start ${vmid}"
-else
-  echo "==> Creating VM ${vmid} (${name})..."
-  # pre-enrolled-keys=0 disables OVMF's Secure Boot key pre-enrollment --
-  # required, or systemd-boot (unsigned) can't be trusted by the firmware.
-  # --agent 1: wires up the virtio-serial channel QEMU exposes to the guest.
-  # modules/common/configuration.nix sets services.qemuGuest.enable = true
-  # on every host, so the guest-side qemu-ga daemon is already running --
-  # without this flag Proxmox never creates the channel it listens on, so
-  # `qm guest exec`/`qm agent` and the UI's IP-address display silently
-  # never work for any VM this script creates.
-  remote "qm create ${vmid} --name ${name} --memory ${memory} --cores ${cores} \
--net0 virtio,bridge=${bridge} --bios ovmf --machine q35 --scsihw virtio-scsi-pci \
--efidisk0 ${storage}:1,efitype=4m,pre-enrolled-keys=0 --agent enabled=1"
-
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] ssh ${ssh_target} -- qm importdisk ${vmid} ${remote_path} ${storage}"
-    echo "[dry-run] (would parse the resulting disk identifier from that output)"
-    echo "[dry-run] ssh ${ssh_target} -- qm set ${vmid} --scsi0 ${storage}:<parsed-disk-id>"
-  else
-    importdisk_output="$(ssh "$ssh_target" "qm importdisk ${vmid} ${remote_path} ${storage}")"
-    echo "$importdisk_output"
-    disk_id="$(echo "$importdisk_output" | grep -oP "(?<=Successfully imported disk as ')[^']+" | sed 's/^unused[0-9]*://')"
-    if [[ -z "$disk_id" ]]; then
-      echo "ERROR: couldn't parse the imported disk identifier from qm importdisk's output above." >&2
-      echo "The VM shell (${vmid}) and imported disk both exist -- finish attaching it by hand:" >&2
-      echo "  ssh ${ssh_target} -- qm set ${vmid} --scsi0 ${storage}:<disk-id-from-output-above>" >&2
-      echo "  ssh ${ssh_target} -- qm set ${vmid} --boot order=scsi0" >&2
-      exit 1
-    fi
-    remote "qm set ${vmid} --scsi0 ${disk_id}"
-  fi
-  remote "qm set ${vmid} --boot order=scsi0"
-  remote "qm start ${vmid}"
-fi
-
-echo
-if [[ "$dry_run" -eq 1 ]]; then
-  echo "[dry-run] Nothing was built, uploaded, or created."
-else
-  echo "Done. ${name} (VMID ${vmid}) should be booting on ${node}."
-fi
@@ -1,150 +0,0 @@
-#!/usr/bin/env bash
-# Backs up the local sops age key (the private key that decrypts
-# secrets/*.yaml -- normally the one trusted as &admin) to an arbitrary
-# destination path, e.g. a USB drive or other offline storage, so it can
-# later be restored and handed to rotate-admin-key.sh if this machine's
-# copy is ever lost, or to run either script from a different machine.
-#
-# Usage:
-#   scripts/secrets/backup-admin-key.sh <dest-path> [--key-file <path>] [--force] [--dry-run]
-#
-# Source key resolution matches sops/age's own default order:
-#   $SOPS_AGE_KEY (inline identity text) if set, else
-#   --key-file if given, else
-#   $SOPS_AGE_KEY_FILE if set, else
-#   ${XDG_CONFIG_HOME:-$HOME/.config}/sops/age/keys.txt
-set -euo pipefail
-
-repo_root="$(cd "$(dirname "$0")/../.." && pwd)"
-sops_yaml="${repo_root}/.sops.yaml"
-
-# shellcheck source=../env.sh
-source "${repo_root}/scripts/env.sh"
-# shellcheck source=../lib/sops-age.sh
-source "${repo_root}/scripts/lib/sops-age.sh"
-
-# Pin cwd for the same reason rotate-admin-key.sh does: age/sops calls
-# below should never depend on wherever the caller's shell happened to be.
-cd "$repo_root"
-
-usage() {
-  cat <<EOF
-Usage: $0 <dest-path> [--key-file <path>] [--force] [--dry-run]
-
-  <dest-path>        Where to write the backup. Parent directories are
-                     created as needed. Written with 0600 permissions.
-  --key-file <path>  Read the key from here instead of the default
-                     sops/age resolution (\$SOPS_AGE_KEY_FILE, then
-                     \${XDG_CONFIG_HOME:-\$HOME/.config}/sops/age/keys.txt).
-                     Ignored if \$SOPS_AGE_KEY is set (that always wins,
-                     same precedence sops/age itself uses).
-  --force            Overwrite <dest-path> if it already exists.
-  --dry-run          Print what would happen; write nothing.
-EOF
-}
-
-dry_run=0
-force=0
-key_file="$DEFAULT_SOPS_AGE_KEY_FILE"
-args=()
-
-while [[ $# -gt 0 ]]; do
-  case "$1" in
-    --dry-run)
-      dry_run=1
-      shift
-      ;;
-    --force)
-      force=1
-      shift
-      ;;
-    --key-file)
-      key_file="${2:?--key-file requires a path}"
-      shift 2
-      ;;
-    -h | --help)
-      usage
-      exit 0
-      ;;
-    --*)
-      echo "Unknown option: $1" >&2
-      usage >&2
-      exit 1
-      ;;
-    *)
-      args+=("$1")
-      shift
-      ;;
-  esac
-done
-
-if [[ "${#args[@]}" -ne 1 ]]; then
-  usage >&2
-  exit 1
-fi
-dest="${args[0]}"
-
-nix_extra_opts
-
-if [[ -n "${SOPS_AGE_KEY:-}" ]]; then
-  echo "==> Source: \$SOPS_AGE_KEY (inline identity from the environment)."
-  src_content="$SOPS_AGE_KEY"
-else
-  [[ -s "$key_file" ]] || {
-    echo "ERROR: no key found. \$SOPS_AGE_KEY is unset and ${key_file} doesn't exist or is empty." >&2
-    exit 1
-  }
-  echo "==> Source: ${key_file}"
-  src_content="$(cat "$key_file")"
-fi
-
-# Round-trip through a private scratch file (rather than trusting the
-# source string as-is) so age-keygen -y validates it's a real identity
-# before anything is written to <dest-path>.
-scratch="$(mktemp)"
-trap 'rm -f "$scratch"' EXIT
-( umask 077; printf '%s\n' "$src_content" > "$scratch" )
-
-src_pub="$(age_pubkey_from_identity_file "$scratch")" || {
-  echo "ERROR: source doesn't look like a valid age identity (age-keygen -y failed)." >&2
-  exit 1
-}
-echo "    public key: ${src_pub}"
-
-current_admin_pub="$(sops_yaml_admin_pubkey "$sops_yaml")"
-if [[ -n "$current_admin_pub" && "$current_admin_pub" != "$src_pub" ]]; then
-  echo "NOTE: this key does not match .sops.yaml's current &admin entry (${current_admin_pub})."
-  echo "      Backing it up anyway -- this script doesn't require it to be the admin key."
-fi
-
-if [[ -e "$dest" && "$force" -ne 1 ]]; then
-  echo "ERROR: ${dest} already exists. Pass --force to overwrite." >&2
-  exit 1
-fi
-
-if [[ "$dry_run" -eq 1 ]]; then
-  echo
-  echo "[dry-run] would write $(wc -c <"$scratch" | tr -d ' ') bytes to ${dest} (mode 0600)"
-  [[ -e "$dest" ]] && echo "[dry-run] would overwrite existing file (--force given)"
-  echo "[dry-run] Nothing was written. Re-run without --dry-run to apply this."
-  exit 0
-fi
-
-mkdir -p "$(dirname "$dest")"
-install -m 600 "$scratch" "$dest"
-
-dest_pub="$(age_pubkey_from_identity_file "$dest")"
-if [[ "$dest_pub" != "$src_pub" ]]; then
-  echo "ERROR: ${dest} was written but its public key doesn't match the source -- investigate before relying on this backup." >&2
-  exit 1
-fi
-
-cat <<EOF
-
-Done. Backed up to: ${dest}
-  public key: ${dest_pub}
-
-This is a private key -- store it somewhere offline/secure, not in this
-repo or anywhere it'd get committed. Restore it with:
-  scripts/secrets/rotate-admin-key.sh ${dest}
-EOF
@@ -1,193 +0,0 @@
-#!/usr/bin/env bash
-# Rotates the &admin sops age key: decrypts with a backed-up copy of the
-# key CURRENTLY trusted as &admin, replaces .sops.yaml's &admin entry with
-# a new key already present in this environment, and re-encrypts every
-# secrets/*.yaml for the new recipient set. After this runs, the old key
-# can no longer decrypt anything -- this is a real, one-way handoff of
-# trust, not a preview.
-#
-# This is the automation for the manual steps create-proxmox-resource.sh /
-# sync-host-keys.sh print when they bootstrap a brand-new, not-yet-trusted
-# age key on a machine that's never had admin access before:
-#
-#   scripts/secrets/rotate-admin-key.sh /path/to/backed-up/admin/keys.txt
-#
-# The backup key's *public* key must match .sops.yaml's current &admin
-# entry -- this script verifies that by deriving it, it doesn't just trust
-# the filename or take it on faith. The new key defaults to wherever sops
-# itself would already look ($SOPS_AGE_KEY_FILE, then the XDG default), so
-# the common case is just pointing this at the restored backup.
-set -euo pipefail
-
-repo_root="$(cd "$(dirname "$0")/../.." && pwd)"
-sops_yaml="${repo_root}/.sops.yaml"
-
-# shellcheck source=../env.sh
-source "${repo_root}/scripts/env.sh"
-# shellcheck source=../lib/sops-age.sh
-source "${repo_root}/scripts/lib/sops-age.sh"
-
-# sops resolves .sops.yaml by walking up from the process's cwd, not from
-# the target file's own path -- if this script were invoked from somewhere
-# other than the repo root (or from inside another checkout/worktree that
-# happens to have its own .sops.yaml), `sops updatekeys` would silently
-# re-encrypt against the WRONG config's recipient list instead of this
-# repo's. Pin cwd here so every sops/age call below is unambiguous
-# regardless of where the caller's shell started out.
-cd "$repo_root"
-
-usage() {
-  cat <<EOF
-Usage: $0 <path-to-backed-up-admin-key> [--new-key-file <path>] [--dry-run]
-
-  <path-to-backed-up-admin-key>  age identity file for the key CURRENTLY
-                                 trusted as &admin. Only ever read -- never
-                                 copied or modified.
-  --new-key-file <path>          age identity file for the key to promote
-                                 to &admin. Defaults to \$SOPS_AGE_KEY_FILE,
-                                 then
-                                 \${XDG_CONFIG_HOME:-\$HOME/.config}/sops/age/keys.txt
-                                 (sops/age's own default resolution order).
-  --dry-run                      Print what would change; touches nothing
-                                  (.sops.yaml untouched, no sops updatekeys
-                                  calls).
-EOF
-}
-
-dry_run=0
-new_key_file="$DEFAULT_SOPS_AGE_KEY_FILE"
-args=()
-
-while [[ $# -gt 0 ]]; do
-  case "$1" in
-    --dry-run)
-      dry_run=1
-      shift
-      ;;
-    --new-key-file)
-      new_key_file="${2:?--new-key-file requires a path}"
-      shift 2
-      ;;
-    -h | --help)
-      usage
-      exit 0
-      ;;
-    --*)
-      echo "Unknown option: $1" >&2
-      usage >&2
-      exit 1
-      ;;
-    *)
-      args+=("$1")
-      shift
-      ;;
-  esac
-done
-
-if [[ "${#args[@]}" -ne 1 ]]; then
-  usage >&2
-  exit 1
-fi
-backup_key="${args[0]}"
-
-[[ -s "$backup_key" ]] || { echo "ERROR: backup key file not found or empty: ${backup_key}" >&2; exit 1; }
-[[ -s "$new_key_file" ]] || { echo "ERROR: new key file not found or empty: ${new_key_file}" >&2; exit 1; }
-
-nix_extra_opts
-
-echo "==> Deriving public keys..."
-old_pub="$(age_pubkey_from_identity_file "$backup_key")"
-new_pub="$(age_pubkey_from_identity_file "$new_key_file")"
-echo "    backup (old admin) key: ${old_pub}"
-echo "    new admin key:          ${new_pub}"
-
-if [[ "$old_pub" == "$new_pub" ]]; then
-  echo "ERROR: backup key and new key are identical -- nothing to rotate." >&2
-  exit 1
-fi
-
-current_admin_pub="$(sops_yaml_admin_pubkey "$sops_yaml")"
-if [[ -z "$current_admin_pub" ]]; then
-  echo "ERROR: couldn't find a '&admin age1...' line in ${sops_yaml}." >&2
-  exit 1
-fi
-
-if [[ "$current_admin_pub" != "$old_pub" ]]; then
-  echo "ERROR: ${backup_key} doesn't match the current &admin key in .sops.yaml." >&2
-  echo "  .sops.yaml &admin: ${current_admin_pub}" >&2
-  echo "  backup key pubkey: ${old_pub}" >&2
-  echo "Wrong backup file, or .sops.yaml has already moved on -- not touching anything." >&2
-  exit 1
-fi
-
-mapfile -t secrets_files < <(find "${repo_root}/secrets" -maxdepth 1 -name '*.yaml' | sort)
-if [[ "${#secrets_files[@]}" -eq 0 ]]; then
-  echo "ERROR: no secrets/*.yaml files found under ${repo_root}/secrets." >&2
-  exit 1
-fi
-
-# sops_can_decrypt <key-file> <secrets-file>: used both to confirm the
-# backup key still works before touching anything, and again after
-# rotation to confirm the new key does too.
-sops_can_decrypt() {
-  local key_file="$1" secrets_file="$2"
-  SOPS_AGE_KEY_FILE="$key_file" nix-shell "${NIX_OPTS[@]}" -p sops --run \
-    "sops -d '${secrets_file}'" >/dev/null
-}
-
-echo "==> Confirming the backup key can actually decrypt..."
-if ! sops_can_decrypt "$backup_key" "${secrets_files[0]}"; then
-  echo "ERROR: backup key failed to decrypt $(basename "${secrets_files[0]}") -- aborting." >&2
-  exit 1
-fi
-echo "    OK: decrypted $(basename "${secrets_files[0]}")"
-
-if [[ "$dry_run" -eq 1 ]]; then
-  echo
-  echo "[dry-run] would replace .sops.yaml's &admin line:"
-  echo "[dry-run]   - ${current_admin_pub}"
-  echo "[dry-run]   + ${new_pub}"
-  echo "[dry-run] would then re-encrypt (sops updatekeys --yes) for the new recipient set:"
-  for f in "${secrets_files[@]}"; do
-    echo "[dry-run]   secrets/$(basename "$f")"
-  done
-  echo
-  echo "[dry-run] Nothing was changed. Re-run without --dry-run to apply this."
-  exit 0
-fi
-
-echo "==> Rotating .sops.yaml's &admin key..."
-sed -i "s|^  - &admin age1[a-z0-9]*|  - \&admin ${new_pub}|" "$sops_yaml"
-grep -qF "$new_pub" "$sops_yaml" || {
-  echo "ERROR: sed edit didn't take -- .sops.yaml left unchanged, check it by hand." >&2
-  exit 1
-}
-echo "    Updated."
-
-echo "==> Re-encrypting secrets/*.yaml for the new recipient set..."
-for f in "${secrets_files[@]}"; do
-  echo "==> $(basename "$f")"
-  sops_updatekeys "$f" "$backup_key"
-done
-
-echo "==> Verifying the new key can decrypt everything..."
-for f in "${secrets_files[@]}"; do
-  if ! sops_can_decrypt "$new_key_file" "$f"; then
-    echo "ERROR: new key failed to decrypt $(basename "$f") after rotation -- investigate before committing." >&2
-    exit 1
-  fi
-  echo "    OK: $(basename "$f")"
-done
-
-cat <<EOF
-
-Done. .sops.yaml's &admin key is now:
-  ${new_pub}
-
-The old key (${old_pub}) can no longer decrypt any secrets/*.yaml
-re-encrypted above.
-
-Review the diff, then commit:
-  git add .sops.yaml secrets/*.yaml
-  git commit -m "Rotate sops admin age key"
-EOF
@@ -1,446 +0,0 @@
-#!/usr/bin/env bash
-# Manages host-keys/ + .sops.yaml + secrets/*.yaml recipients together, so
-# a flake target's SSH host key and its sops registration never drift out
-# of sync with each other or with the flake itself.
-#
-#   sync-host-keys.sh --all                Generate/register every flake
-#                                           target missing a key.
-#   sync-host-keys.sh <target>              Same, for just one target.
-#   sync-host-keys.sh --remove              Interactively remove one
-#                                           locally-managed key.
-#   sync-host-keys.sh --regenerate-all-keys Remove and freshly regenerate
-#                                           every locally-managed key.
-#
-# "Generate/register" is idempotent and additive only: an existing
-# host-keys/ file is never touched, and .sops.yaml only ever gains an
-# anchor/alias it doesn't already have -- safe to re-run any time, e.g.
-# right after adding a new host to flake.nix.
-#
-# --remove and --regenerate-all-keys only ever operate on anchors that have
-# a corresponding host-keys/<name>_ssh_host_ed25519_key file. Anchors
-# without one (&admin, and any anchor for an already-deployed host whose
-# real /etc/ssh key was registered by hand, e.g. &docker/&server/&nix-cache
-# today) are never listed, removed, or regenerated -- this tooling only
-# ever touches keys it itself manages.
-set -euo pipefail
-
-repo_root="$(cd "$(dirname "$0")/../.." && pwd)"
-sops_yaml="${repo_root}/.sops.yaml"
-keydir="${repo_root}/host-keys"
-editor="${repo_root}/scripts/lib/sync-host-keys-edit-sops.py"
-
-# shellcheck source=../env.sh
-source "${repo_root}/scripts/env.sh"
-# shellcheck source=../lib/nix-eval.sh
-source "${repo_root}/scripts/lib/nix-eval.sh"
-# shellcheck source=../lib/ssh-host-keys.sh
-source "${repo_root}/scripts/lib/ssh-host-keys.sh"
-# shellcheck source=../lib/sops-age.sh
-source "${repo_root}/scripts/lib/sops-age.sh"
-# shellcheck source=../lib/confirm.sh
-source "${repo_root}/scripts/lib/confirm.sh"
-
-mkdir -p "$keydir"
-
-usage() {
-  cat <<EOF
-Usage: $0 --all [--dry-run]
-       $0 <flake-target> [--dry-run]
-       $0 --remove [--dry-run]
-       $0 --regenerate-all-keys [--dry-run]
-
-  --all                    Generate + register a host key for every flake
-                            target that's missing one.
-  <flake-target>            Same, for just one target (e.g. lxc-server).
-                            Reports if it already has one.
-  --remove                  Interactively pick one locally-managed key to
-                            remove from .sops.yaml and host-keys/.
-  --regenerate-all-keys     Remove every locally-managed key and generate
-                            fresh replacements for every current flake
-                            target. Destructive -- requires typed
-                            confirmation.
-  --dry-run                 Combine with any of the above: print what would
-                            change (host-keys/ files, .sops.yaml anchors and
-                            key_groups, which secrets/*.yaml would be
-                            re-encrypted) without touching anything. No keys
-                            generated, no files written, no sops calls,
-                            no prompts for confirmation.
-EOF
-}
-
-# --- step 0: make sure we can actually decrypt anything at all -------------
-#
-# Registering a host means editing .sops.yaml and then running
-# `sops updatekeys`, which has to decrypt each secrets file with an
-# existing recipient's key before it can re-encrypt it for the new one.
-# Check this before doing anything else, the same order sops/age itself
-# resolves a usable key in: SOPS_AGE_KEY (inline), then SOPS_AGE_KEY_FILE,
-# then the XDG default path.
-ensure_admin_decrypt_key() {
-  if [[ -n "${SOPS_AGE_KEY:-}" ]]; then
-    echo "Using SOPS_AGE_KEY from the environment."
-    return
-  fi
-
-  local key_file="$DEFAULT_SOPS_AGE_KEY_FILE"
-
-  if [[ -s "$key_file" ]]; then
-    echo "Found existing sops age key at ${key_file}."
-    return
-  fi
-
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] No sops age decryption key found (checked \$SOPS_AGE_KEY, \$SOPS_AGE_KEY_FILE, ${key_file})."
-    echo "[dry-run] Would generate a new one here -- continuing the dry run without one; any"
-    echo "[dry-run] 'would re-encrypt' output below couldn't actually run for real yet."
-    return
-  fi
-
-  echo "No sops age decryption key found (checked \$SOPS_AGE_KEY, \$SOPS_AGE_KEY_FILE, ${key_file})."
-  echo "Generating a new one at ${key_file}..."
-  mkdir -p "$(dirname "$key_file")"
-  nix-shell "${NIX_OPTS[@]}" -p age --run "age-keygen -o '${key_file}'" 2>&1 | grep -v "^Public key:" || true
-  local new_pub
-  new_pub="$(age_pubkey_from_identity_file "$key_file")"
-
-  cat <<EOF
-
-A brand-new age key was just generated -- it cannot decrypt anything that
-already exists in secrets/*.yaml, since nothing was ever encrypted for it.
-That trust can't be bootstrapped automatically (nobody can decrypt a file
-for a recipient that didn't exist when it was last encrypted).
-
-To actually use this key:
-  1. Have someone who currently CAN decrypt replace the &admin entry in
-     .sops.yaml with this public key:
-       ${new_pub}
-  2. They re-encrypt every secrets/*.yaml:
-       sops updatekeys --yes secrets/common.yaml
-       sops updatekeys --yes secrets/nix-cache.yaml
-       sops updatekeys --yes secrets/server.yaml
-  3. Re-run this script.
-
-Exiting without making any other changes.
-EOF
-  exit 1
-}
-
-discover_targets() {
-  # installer is the one nixosConfigurations target that doesn't import
-  # sops-nix at all (see CLAUDE.md's "Security Notes" -- hardcoded login
-  # password instead) -- config.sops.secrets doesn't exist for it.
-  list_flake_targets "$repo_root" | grep -v '^installer$'
-}
-
-locally_managed_hosts() {
-  for f in "$keydir"/*_ssh_host_ed25519_key.pub; do
-    [[ -e "$f" ]] || continue
-    basename "$f" _ssh_host_ed25519_key.pub
-  done
-}
-
-add_keys_json="[]"
-add_aliases_json="[]"
-dry_run=0
-
-queue_host_sync() {
-  local host="$1"
-  local keyfile="${keydir}/${host}_ssh_host_ed25519_key"
-  local has_local_key=0 has_anchor=0
-  [[ -f "$keyfile" ]] && has_local_key=1
-  grep -qE "^  - &${host} age1" "$sops_yaml" && has_anchor=1
-
-  if [[ "$has_local_key" -eq 0 && "$has_anchor" -eq 1 ]]; then
-    echo "SKIP ${host}: .sops.yaml already has an &${host} anchor, but"
-    echo "     host-keys/${host}_ssh_host_ed25519_key is missing locally."
-    echo "     Not generating a replacement -- it wouldn't match whatever's"
-    echo "     already registered (and possibly deployed). Remove the"
-    echo "     &${host} line from .sops.yaml first if you really want a"
-    echo "     fresh key, then re-run."
-    return 1
-  fi
-
-  if [[ "$has_local_key" -eq 0 ]]; then
-    if [[ "$dry_run" -eq 1 ]]; then
-      echo "[dry-run] ${host}: would generate host key"
-    else
-      echo "==> ${host}: generating host key"
-      generate_host_ed25519_key "$host" "$keyfile"
-    fi
-  else
-    echo "==> ${host}: host key already present"
-  fi
-
-  if [[ "$has_anchor" -eq 0 ]]; then
-    local age_pub
-    if [[ "$dry_run" -eq 1 ]]; then
-      age_pub="dry-run-placeholder-not-a-real-key"
-    else
-      age_pub="$(ssh_pubkey_to_age "${keyfile}.pub")"
-    fi
-    add_keys_json="$(jq --arg host "$host" --arg key "$age_pub" \
-      '. + [{host: $host, age_key: $key}]' <<<"$add_keys_json")"
-  fi
-
-  echo "==> ${host}: checking which secrets files it references"
-  local basenames
-  mapfile -t basenames < <(
-    nix eval --json --no-use-registries --no-accept-flake-config \
-      "${repo_root}#nixosConfigurations.${host}.config.sops.secrets" \
-      --apply 'builtins.mapAttrs (n: v: baseNameOf v.sopsFile)' \
-    | jq -r '[.[]] | unique | .[]'
-  )
-  local basename
-  for basename in "${basenames[@]}"; do
-    add_aliases_json="$(jq --arg host "$host" --arg basename "$basename" \
-      '. + [{host: $host, basename: $basename}]' <<<"$add_aliases_json")"
-  done
-}
-
-# In dry-run, this runs the exact same edit logic (so idempotency/what's-
-# actually-new is determined for real, not guessed) but against a scratch
-# copy of .sops.yaml that's discarded afterward -- the real file is never
-# opened for writing, and `sops updatekeys` never runs.
-apply_edit_plan() {
-  local plan="$1"
-  local target="$sops_yaml"
-  local tmpfile=""
-  if [[ "$dry_run" -eq 1 ]]; then
-    tmpfile="$(mktemp)"
-    cp "$sops_yaml" "$tmpfile"
-    target="$tmpfile"
-  fi
-
-  local result
-  result="$(echo "$plan" | nix-shell "${NIX_OPTS[@]}" -p python3 --run "python3 '${editor}' '${target}'")"
-  [[ -n "$tmpfile" ]] && rm -f "$tmpfile"
-
-  local added removed changed
-  added="$(jq -r '.added_keys[]?' <<<"$result")"
-  removed="$(jq -r '.removed_keys[]?' <<<"$result")"
-  changed="$(jq -r '.changed_secrets_files[]?' <<<"$result")"
-
-  if [[ -z "$added" && -z "$removed" && -z "$changed" ]]; then
-    echo "Nothing changed in .sops.yaml."
-    return
-  fi
-
-  local prefix=""
-  [[ "$dry_run" -eq 1 ]] && prefix="[dry-run] would "
-
-  [[ -n "$added" ]] && echo "${prefix}Add .sops.yaml anchors: $(tr '\n' ' ' <<<"$added")"
-  [[ -n "$removed" ]] && echo "${prefix}Remove .sops.yaml anchors: $(tr '\n' ' ' <<<"$removed")"
-
-  if [[ -n "$changed" ]]; then
-    if [[ "$dry_run" -eq 1 ]]; then
-      echo "[dry-run] would re-encrypt:"
-      while IFS= read -r basename; do
-        [[ -z "$basename" ]] && continue
-        echo "  secrets/${basename}"
-      done <<<"$changed"
-    else
-      echo "Re-encrypting affected secrets files..."
-      while IFS= read -r basename; do
-        [[ -z "$basename" ]] && continue
-        echo "==> secrets/${basename}"
-        sops_updatekeys "${repo_root}/secrets/${basename}"
-      done <<<"$changed"
-    fi
-  fi
-}
-
-flush_additions() {
-  if [[ "$add_keys_json" == "[]" && "$add_aliases_json" == "[]" ]]; then
-    echo "Nothing to do -- every requested target already has a fully registered host key."
-    return
-  fi
-  echo
-  echo "Applying .sops.yaml edits..."
-  local plan
-  plan="$(jq -n --argjson add_keys "$add_keys_json" --argjson add_aliases "$add_aliases_json" \
-    '{add_keys: $add_keys, add_aliases: $add_aliases}')"
-  apply_edit_plan "$plan"
-  echo
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] Nothing was changed. Re-run without --dry-run to apply this."
-  else
-    echo "Done. Review the .sops.yaml / secrets/*.yaml diff, then commit and push --"
-    echo "the flake build the installer uses has to see the new recipient(s) before"
-    echo "any of these hosts can decrypt their secrets on first boot."
-  fi
-}
-
-cmd_all() {
-  echo "Discovering flake targets..."
-  local targets
-  mapfile -t targets < <(discover_targets)
-  local host
-  for host in "${targets[@]}"; do
-    queue_host_sync "$host" || true
-  done
-  flush_additions
-}
-
-cmd_target() {
-  local host="$1"
-  local targets
-  mapfile -t targets < <(discover_targets)
-  if ! printf '%s\n' "${targets[@]}" | grep -qxF "$host"; then
-    echo "ERROR: '${host}' is not a current nixosConfigurations target." >&2
-    echo "Current targets:" >&2
-    printf '  %s\n' "${targets[@]}" >&2
-    exit 1
-  fi
-  queue_host_sync "$host" || exit 1
-  flush_additions
-}
-
-cmd_remove() {
-  local hosts
-  mapfile -t hosts < <(locally_managed_hosts)
-  if [[ "${#hosts[@]}" -eq 0 ]]; then
-    echo "No locally-managed keys in host-keys/ -- nothing to remove."
-    return
-  fi
-
-  echo "Locally-managed keys:"
-  local i=1 host
-  for host in "${hosts[@]}"; do
-    local registered="not registered in .sops.yaml"
-    grep -qE "^  - &${host} age1" "$sops_yaml" && registered="registered in .sops.yaml"
-    printf '  %d) %s (%s)\n' "$i" "$host" "$registered"
-    i=$((i + 1))
-  done
-
-  local choice
-  read -rp "Remove which one? (number, or blank to cancel): " choice
-  if [[ -z "$choice" ]]; then
-    echo "Cancelled."
-    return
-  fi
-  if ! [[ "$choice" =~ ^[0-9]+$ ]] || (( choice < 1 || choice > ${#hosts[@]} )); then
-    echo "ERROR: invalid selection." >&2
-    exit 1
-  fi
-  local target="${hosts[$((choice - 1))]}"
-
-  if [[ "$dry_run" -ne 1 ]]; then
-    read -rp "Really remove '${target}'? Its host-keys/ files will be deleted and it will lose access to every secrets file it can currently decrypt. (y/N): " confirm
-    if [[ ! "$confirm" =~ ^[Yy]$ ]]; then
-      echo "Cancelled."
-      return
-    fi
-  fi
-
-  local plan
-  plan="$(jq -n --arg host "$target" \
-    '{remove_keys: [$host], remove_aliases_for_hosts: [$host]}')"
-  apply_edit_plan "$plan"
-
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] would delete host-keys/${target}_ssh_host_ed25519_key(.pub)."
-    echo "[dry-run] Nothing was changed. Re-run without --dry-run to apply this."
-  else
-    rm -f "${keydir}/${target}_ssh_host_ed25519_key" "${keydir}/${target}_ssh_host_ed25519_key.pub"
-    echo "Removed host-keys/${target}_ssh_host_ed25519_key(.pub)."
-    echo
-    echo "Review the diff, then commit and push."
-  fi
-}
-
-cmd_regenerate_all() {
-  local hosts
-  mapfile -t hosts < <(locally_managed_hosts)
-  if [[ "${#hosts[@]}" -eq 0 ]]; then
-    echo "No locally-managed keys in host-keys/ -- nothing to regenerate."
-    return
-  fi
-
-  echo "This will remove and freshly regenerate ALL locally-managed keys:"
-  printf '  %s\n' "${hosts[@]}"
-  echo
-  echo "Every host above will need its new key baked into a rebuilt install"
-  echo "image/tarball before it can decrypt secrets again."
-
-  if [[ "$dry_run" -ne 1 ]]; then
-    if ! confirm_typed "REGENERATE" "Type REGENERATE to confirm: "; then
-      echo "Cancelled."
-      return
-    fi
-  fi
-
-  echo
-  local hosts_json
-  hosts_json="$(printf '%s\n' "${hosts[@]}" | jq -R . | jq -s .)"
-  local plan
-  plan="$(jq -n --argjson hosts "$hosts_json" \
-    '{remove_keys: $hosts, remove_aliases_for_hosts: $hosts}')"
-  apply_edit_plan "$plan"
-
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] would delete ${#hosts[@]} host-keys/ file pair(s)."
-    echo "[dry-run] would then generate fresh replacements for the same hosts"
-    echo "[dry-run] (not simulated further here -- run without --dry-run, or"
-    echo "[dry-run] preview a specific target with: $0 <target> --dry-run)."
-    echo
-    echo "[dry-run] Nothing was changed. Re-run without --dry-run to apply this."
-    return
-  fi
-
-  echo "Removing existing keys..."
-  local host
-  for host in "${hosts[@]}"; do
-    rm -f "${keydir}/${host}_ssh_host_ed25519_key" "${keydir}/${host}_ssh_host_ed25519_key.pub"
-  done
-  echo "Removed ${#hosts[@]} host-keys/ file pair(s)."
-
-  echo
-  echo "Regenerating fresh keys for every current flake target..."
-  cmd_all
-}
-
-main() {
-  local args=()
-  local arg
-  for arg in "$@"; do
-    if [[ "$arg" == "--dry-run" ]]; then
-      dry_run=1
-    else
-      args+=("$arg")
-    fi
-  done
-  set -- "${args[@]+"${args[@]}"}"
-
-  if [[ "$dry_run" -eq 1 ]]; then
-    echo "[dry-run] no changes will be made"
-    echo
-  fi
-
-  nix_extra_opts
-  ensure_admin_decrypt_key
-
-  case "${1:-}" in
-    --all)
-      cmd_all
-      ;;
-    --remove)
-      cmd_remove
-      ;;
-    --regenerate-all-keys)
-      cmd_regenerate_all
-      ;;
-    -h | --help | "")
-      usage
-      ;;
-    --*)
-      echo "Unknown option: $1" >&2
-      usage >&2
-      exit 1
-      ;;
-    *)
-      cmd_target "$1"
-      ;;
-  esac
-}
-
-main "$@"
@@ -1,110 +0,0 @@
-#!/usr/bin/env bash
-# Detects and fixes drift between the ed25519 SSH host key nix-cache is
-# actually serving right now and vars.nixCacheHostKey (variables.nix) --
-# the value modules/nix-cache/remote-builder-client.nix bakes into every
-# client's declarative programs.ssh.knownHosts, and
-# scripts/proxmox/configure-nix-cache-client.sh hardcodes as its own
-# default for non-NixOS clients.
-#
-# This value has no automatic source of truth: nix-cache's host key is
-# generated once (first boot / container recreate) and never touches this
-# repo again unless someone remembers to update it by hand afterwards. It
-# drifted silently once already -- confirmed live: variables.nix recorded
-# a key that no longer matched what nix-cache actually presented, which
-# would fail every real client's SSH host-key verification for
-# distributed builds without ever producing an obvious error pointing
-# back here (a client just sees "Host key verification failed" against
-# *some* key, with no hint that the trusted value itself was stale).
-#
-# codex-maintenance.sh runs this in --check mode on every invocation so
-# that drift surfaces as a warning instead of a future debugging session.
-#
-# Usage:
-#   scripts/secrets/sync-nix-cache-host-key.sh [--check] [--dry-run] [--host <name>]
-#
-#   --check     Only report drift (exit 1 if found, 2 if nix-cache is
-#               unreachable); never writes. For CI/maintenance use.
-#   --dry-run   Show what would change; never writes.
-#   --host      Override the hostname to scan (default: variables.nix's
-#               nixCacheHost / env.sh's NIX_CACHE_HOST).
-set -euo pipefail
-
-repo_root="$(cd "$(dirname "$0")/../.." && pwd)"
-variables_nix="${repo_root}/variables.nix"
-client_script="${repo_root}/scripts/proxmox/configure-nix-cache-client.sh"
-
-# shellcheck source=../env.sh
-source "${repo_root}/scripts/env.sh"
-
-check_only=0
-dry_run=0
-host="${NIX_CACHE_HOST}"
-
-while [[ $# -gt 0 ]]; do
-  case "$1" in
-    --check) check_only=1; shift ;;
-    --dry-run) dry_run=1; shift ;;
-    --host)
-      host="${2:?--host requires a hostname}"
-      shift 2
-      ;;
-    -h|--help)
-      sed -n '2,23p' "$0"
-      exit 0
-      ;;
-    *)
-      echo "ERROR: unknown argument: $1" >&2
-      exit 1
-      ;;
-  esac
-done
-
-current_value="$(grep -oE 'nixCacheHostKey = "[^"]+"' "$variables_nix" | sed -E 's/nixCacheHostKey = "(.*)"/\1/')"
-if [[ -z "$current_value" ]]; then
-  echo "ERROR: couldn't find nixCacheHostKey in $variables_nix" >&2
-  exit 1
-fi
-current_type_blob="$(awk '{print $1, $2}' <<<"$current_value")"
-current_label="$(awk '{print $3}' <<<"$current_value")"
-
-echo "Scanning ${host} for its current ed25519 SSH host key..."
-nix_extra_opts
-scanned="$(nix-shell "${NIX_OPTS[@]}" -p openssh --run "ssh-keyscan -t ed25519 -T 5 '${host}'" 2>/dev/null | grep -v '^#' | head -1 || true)"
-if [[ -z "$scanned" ]]; then
-  echo "ERROR: couldn't reach ${host} (or got no ed25519 host key back) via ssh-keyscan." >&2
-  exit 2
-fi
-scanned_type_blob="$(awk '{print $2, $3}' <<<"$scanned")"
-
-if [[ "$current_type_blob" == "$scanned_type_blob" ]]; then
-  echo "Up to date: ${host}'s host key matches variables.nix's nixCacheHostKey."
-  exit 0
-fi
-
-echo "DRIFT DETECTED:"
-echo "  variables.nix has: $current_type_blob"
-echo "  ${host} is now:    $scanned_type_blob"
-
-if [[ "$check_only" -eq 1 ]]; then
-  echo
-  echo "Run 'scripts/secrets/sync-nix-cache-host-key.sh' (no flags) to fix." >&2
-  exit 1
-fi
-
-new_value="${scanned_type_blob} ${current_label}"
-
-if [[ "$dry_run" -eq 1 ]]; then
-  echo "(--dry-run: would update variables.nix and ${client_script##*/} to:)"
-  echo "  $new_value"
-  exit 0
-fi
-
-sed -i "s|nixCacheHostKey = \"[^\"]*\"|nixCacheHostKey = \"${new_value}\"|" "$variables_nix"
-sed -i "s|NIX_CACHE_HOST_KEY:=[^}]*}|NIX_CACHE_HOST_KEY:=${new_value}}|" "$client_script"
-
-echo "Updated variables.nix and ${client_script##*/} to:"
-echo "  $new_value"
-echo
-echo "This only takes effect on already-deployed NixOS clients after their"
-echo "next rebuild (programs.ssh.knownHosts is declarative). Review with"
-echo "'git diff', then run 'bash scripts/codex-maintenance.sh' before committing."
@@ -5,103 +5,76 @@ sops:
    age:
        - enc: |
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            -----END AGE ENCRYPTED FILE-----
-          recipient: age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad
+          recipient: age10nd382a9klsn2mrs60emdtsxe43pht3a0m9p29phfrhy0wfyt3vsq9r667
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBEc0lHazMrVUR2UUlaQ21O
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            -----END AGE ENCRYPTED FILE-----
          recipient: age19gfn2yedg76dmztm4hncr7vf3r3c9j0qpt4rap7y7gersjk4m3ks2lhd0e
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBYZHVnTEk2SjUwdTdKdWNV
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+            GbfB0jfq5PILDQMMuZu5oIBY31SxwnhZ02Ns7gA67kgNIRSCmk9WyQ==
            -----END AGE ENCRYPTED FILE-----
          recipient: age1ll6hj5ggruetgjwjfnplpn5xtq35uhlcdflksx3xmnjm6s3uad9sz70jkf
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBzbXdrajlVQU5RditMckh6
-            ZGhvcU01UEdMbURlcG9mZzg0RTJhcHJ4QlQwCjgyRGVXYytxUFB0WXhadHQ1YVpF
-            VUJpVzE2SzFPc3FHV25FQmVSQzNJTm8KLS0tIG9DazRkUkwyNHNQMnp5R3RySDBo
-            aGFLUFBjZjVxeWFzTXFldHVRNkNyYTAKd6eS5lks4+3SV1bFBQWyPi7OZcvRMDIc
-            kYD5C/vMkKlvBYyODCWJyim2xgM/nyQNcf/q4BUS3HF/RidRdJh9NQ==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBmRURQVGw1a1E1MkIzV2pa
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+            GI/fydgrBruw3Otv6KLZu3CBC7iNcKlvZxz+YGD2qbicmyQ5hAhDSQ==
            -----END AGE ENCRYPTED FILE-----
          recipient: age120le4a5l8dh3lyfgvmj3d9ksmej6ajs5mer5y7r0vfg3x9fn69dqf8xgzu
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBFZEhIT1REUTFtdkIzaDFY
-            dGU4VjU3QlpPU1Rod1dTUWhBbjc0WTR5bUF3CkNGY3F2Q251aXlGNCt5ZjFWMTE1
-            RjY4bHZ1T29aK3N0SktjdUpZbSs4QVEKLS0tIDZrMWd3aFVRMEZMU1N1dlZxYTZS
-            U3gxWU5EVVRXUGxJVlZQZmpZRmdhbW8KJ8yD9laK2T1qn0z2uYNeI80rtMlOVi2M
-            qIPn/FSoWnKQ7NotSTGUtEhC+f/nXfUQrBd5fsfmja++hrevTmkqYw==
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+            BDhHqObzJrOCtfDCTWiYuP+0yvIFWItMWhGSMw9MwwivvwnrEa+ZuQ==
            -----END AGE ENCRYPTED FILE-----
-          recipient: age1jy444f9d9stygj4p3w9kh54cqcfr654tvr75tdvee5cxsgtdtc9q3v60ep
+          recipient: age1qz9d4ka4xgexujyd247s7lp737sulp5fhxl5d65fj2ykvc4j4edqrsdks8
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA0N1owUGpuWWxWb2t2Mk5Z
-            QlZ6Nm5lcnNBY0d1NldBQXY3OThLM2UxbkY4CkZyRUl4S1JRaDhnemRIYWR1OHZx
-            aWliVWh3V1RBL0R3Q0RqOE1SM0VBblUKLS0tIGpaUjJxdnV0UW55T01HcFBsdHR2
-            aEJ3UzJ6RklZVFRrNGMraUtGYXVZd0kKaQmzjnI6xgV7H1YcoI+gRn2IVfOLTJBY
-            rO43fvVtZ79c1as6CL+GoEIJY/uVA/3M4gQ0vYbDDn57vm5OOJW8jg==
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+            ZjdlZmtzNXVOQ25DeCthUzhRRm1MT2cKaxc7zGm57iJFSeYc2IPqF4Eaxa44nR37
+            pWZw+erG4F9AAZ2F047q+oLKe0B8FLSF54IbcXdQhitgGNR7B2HVeA==
            -----END AGE ENCRYPTED FILE-----
          recipient: age120whqj96g26lsgy4udvgsn8dc9lumh8jeu3a564fx79rjr5lxffqmrljuu
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBMWTcwd0JLS0lybWREaU5h
-            NHczcEQxeUx4U09oV2k5ZXpKTGxxR3ZYd2tnCkVXR3kyTHZSSWNaUCszL3Rvakhm
-            bVl5bnFRVkhJRFVaY1NQYTNrd2JKMTAKLS0tIDJTT0YvUE5HUWVKRnhXY2tvMjI1
-            VXNlcnJqcDM5d3poVU1SKzQyNWdpRzQKTht/ko7cy7OY0wGfza4eierYS7q/nCFH
-            YsG74ez3piUQ1rdJRi0e29QWz4xL3JeU9oE+tr0rMB6WvgTmuX5gwQ==
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+            i0FXuepoU353sR7enyL34qPoOdm05ivowuPKNzkq8D4i5AF6vGv+YA==
            -----END AGE ENCRYPTED FILE-----
-          recipient: age1xjst4frdh0th6q8m7p7u9g5af7ty5jqeum0p6z8a52a9q7st7ewqw8yl9j
+          recipient: age164px2a8e48ptsf9ngtan38aa6jls4jdl26mzrgzf6sn3vcvt49hqjrgr8w
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBLWmtNOVVvRW9QbU50OUxv
-            TUYxWXJ4cFVaMjVnVHJVK1VTZzhDd2tCMWpnCllPWnl2bjcxemF6cFp1blZnMEMy
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            -----END AGE ENCRYPTED FILE-----
          recipient: age10at8862478urh0eeuwh8hzln6ck78jgwtztgxatwqlzwagg77y5snm4xzg
-        - enc: |
-            -----BEGIN AGE ENCRYPTED FILE-----
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-            -----END AGE ENCRYPTED FILE-----
-          recipient: age1ezk9x53zt8kcnscdm80jcyf0xq97vndv7jsn3rl8cc0cwm2jmpmq372dzs
-        - enc: |
-            -----BEGIN AGE ENCRYPTED FILE-----
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-            V0JUK2hWaklxTGVhMWR4bytPczhjcldheno4CmZUTWszREVUdVVQazNOdXAvY0FN
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-            -----END AGE ENCRYPTED FILE-----
-          recipient: age1fxxzpnfse8nd9wz78ht3m0plrmraacf4cpga0pe8fm2tdnqcgy8q7qsyvp
-        - enc: |
-            -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBtWGRLTCt5dXZMR1d6a3lD
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-            -----END AGE ENCRYPTED FILE-----
-          recipient: age190htw7prp4vln076dxjx3gxxaq06h0zl0te7cqgpx79vl3lhkaes8suy05
    lastmodified: "2026-07-19T02:30:40Z"
    mac: ENC[AES256_GCM,data:UiL3VMDF6rq4Nr87KspcDx434q3tfNXeb5pwH2O+4ssNQ6xzcYDdzXBnhAY3zLBsqPMKrvHBd4Ot/gEMcq3FMIVe7Q6p9yWKpep66KZ/yWEhAlwIVhD79Oj8VS+1CHKjf25zpRdhZorp04oeFQQd9VfjJB4EE/Q1aVbwTGlpIic=,iv:i/0conaFgFia+wzNTdUL6tlSTw35HTK3Ap1Sr5RGHf8=,tag:ULbz5FllShA/JjlSRdxA0g==,type:str]
    unencrypted_suffix: _unencrypted
@@ -1,35 +1,34 @@
 beszel-token: ENC[AES256_GCM,data:meuzUP/6wCssJDVTgbC0XwiLZPMGyDl55HEIiON9xOXCD9k6,iv:TDqWcp+8Mxd8wN09r5otQRQXq3XTeQphaTWxvvuLTAs=,tag:cRPZQGlwB/dTguBAheWPQg==,type:str]
-cache-priv-key: ENC[AES256_GCM,data:6vQKIf7eS0WNL2Eptoi4VWr18SRMZfN/H/aFUUtXdMYQY5LLyBp2EHRKqZcGFuh1nZhUdAxUztq/CVXx+QFxKW+ElHxCxUSp0QqI1fdSkBkKZb8hlit5SoX9JtLzZGg0HBNM3nJu,iv:0J+xmrPJhInHhFR/c41ACjuTfaIoMkQFSfbL2KkgFa8=,tag:f4s9Szs5oprVVRSyXaX48A==,type:str]
 sops:
    age:
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
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            -----END AGE ENCRYPTED FILE-----
-          recipient: age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad
+          recipient: age10nd382a9klsn2mrs60emdtsxe43pht3a0m9p29phfrhy0wfyt3vsq9r667
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
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          recipient: age120le4a5l8dh3lyfgvmj3d9ksmej6ajs5mer5y7r0vfg3x9fn69dqf8xgzu
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
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-          recipient: age1xjst4frdh0th6q8m7p7u9g5af7ty5jqeum0p6z8a52a9q7st7ewqw8yl9j
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+          recipient: age164px2a8e48ptsf9ngtan38aa6jls4jdl26mzrgzf6sn3vcvt49hqjrgr8w
+    lastmodified: "2026-07-19T02:30:40Z"
+    mac: ENC[AES256_GCM,data:7+FeT6aeCGn+JFBXbPO0qP4BJ1nHPSennewv1kWkG+hOTIqs1ymuswUK1Hyfi6Z9h2umFX9HvK+o3qtmYvk6k7BUNe6w6QUHTNwm6lmNqrb7sgAE3iFVI2p9m14NGhgoTfnXx1M4JIZ1iuNYhCukpENI4+svIe+r7x5YeE5Evac=,iv:4AKAPI6upyAvHBr8BLWX7R/NupmJdcXdqiN8e0ZQ3ls=,tag:TkpfpCaLhn+Mx5cQZZuMdA==,type:str]
    unencrypted_suffix: _unencrypted
    version: 3.13.1
@@ -3,20 +3,20 @@ sops:
    age:
        - enc: |
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            -----END AGE ENCRYPTED FILE-----
-          recipient: age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad
+          recipient: age10nd382a9klsn2mrs60emdtsxe43pht3a0m9p29phfrhy0wfyt3vsq9r667
        - enc: |
            -----BEGIN AGE ENCRYPTED FILE-----
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          recipient: age1ll6hj5ggruetgjwjfnplpn5xtq35uhlcdflksx3xmnjm6s3uad9sz70jkf
    lastmodified: "2026-07-19T02:30:40Z"
@@ -12,22 +12,8 @@
  nfsServerHost = "server"; # NFS export source hostname
  dockerHost = "docker"; # docker-compose stack host

-  # Raspberry Pi's own Tailscale hostname (not fronted by `server` — it
-  # exports its own NFS share directly). Resolved as
-  # "${raspberryPiHost}.${tailnetDomain}" in modules/raspi/mount-data.nix.
-  raspberryPiHost = "raspberrypi";
-
  remoteBuilderUser = "nixremote"; # remote builder SSH user

-  # nix-cache's own SSH host public key (not a secret — the private half
-  # never leaves the host). Wired into every client's
-  # programs.ssh.knownHosts by modules/nix-cache/remote-builder-client.nix
-  # so distributed builds don't hit "Host key verification failed" on a
-  # fresh client that has never manually ssh'd to nix-cache before. Update
-  # this if nix-cache's host key is ever rotated or the host is rebuilt
-  # from scratch.
-  nixCacheHostKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPeWgMsdaiz4axT/deFc1+0B5bN+GX/NOeW9bbQ0c/IT lxc-nix-cache";
-
  # Public keys authorized to SSH in as remoteBuilderUser on the nix-cache
  # host (modules/nix-cache/server.nix) — one per client host that's allowed
  # to use it as a distributed builder.
@@ -38,7 +24,6 @@
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIGtOWOCS+ImHc7NehguoyD7PbonGosKMZqc9+QR3v/h root@nixos"
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHxXTQxFnArK5HXG7czeoybZebCGfxpUdusJkPn+BCSp root@server"
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICMJhrfFayLBG+gWtO6oAvgambw5nWWgztiTFEaaaVRH debian@surface"
-    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJEj26SL/emsVjW2YhRucJVp2kTz8WgcEQgjBEBLRikk root@claude"
  ];

  # Admin SSH public key, authorized on the primary user of every host and
@@ -47,122 +32,13 @@

  # System
  timeZone = "Australia/Brisbane";
-
-  # Main interactive user on every host. Every module that grants this user
-  # a group, a home directory, or tmpfiles ownership should reference
-  # vars.primaryUser rather than the literal "nixos", so renaming it is a
-  # one-line change.
-  primaryUser = "nixos";
+  primaryUser = "nixos"; # main interactive user on every host

  # Storage
  storageRoot = "/tank"; # ZFS pool root on `server`

-  # NFS datasets exported from `storageRoot` on `nfsServerHost` and mounted
-  # by client hosts. `subpath` is relative to `storageRoot` — combined with
-  # it to build both the export line in modules/build-types/server.nix and
-  # the "<nfsServerHost>:<storageRoot>/<subpath>" device string each client
-  # mount uses in modules/docker/mount-data.nix. `mountpoint` is the
-  # absolute local path clients mount it at, referenced by that same file's
-  # fileSystems attribute name plus every other place that needs to know
-  # where the share lives locally (modules/build-types/docker.nix's
-  # tmpfiles rules, modules/traefik/rotate-logs.nix's log path). Renaming a
-  # dataset or moving where it's mounted only needs changing it here — the
-  # export and every client reference follow automatically.
-  nfsShares = {
-    dockerConfig = {
-      subpath = "docker/config";
-      mountpoint = "/mnt/docker/config";
-    };
-    dockerDatabases = {
-      subpath = "docker/databases";
-      mountpoint = "/mnt/docker/databases";
-    };
-    dockerVolumes = {
-      subpath = "docker/volumes";
-      mountpoint = "/mnt/docker/volumes";
-    };
-    nextcloudData = {
-      subpath = "docker/nextcloud-data";
-      mountpoint = "/mnt/nextcloud-data";
-    };
-    raspiVolumes = {
-      subpath = "raspi/volumes";
-      mountpoint = "/mnt/raspi-backup";
-    };
-  };
-
-  # The Raspberry Pi's own NFS export — not under storageRoot/nfsServerHost,
-  # served directly by the Pi itself over Tailscale (see raspberryPiHost
-  # above) and mounted at raspiMountpoint by modules/raspi/mount-data.nix.
-  raspiNfsPath = "/home/raspi/raspi";
-  raspiMountpoint = "/mnt/raspi";
-
-  # Every literal port referenced from modules/ or hosts/, grouped by the
-  # service/host that opens or connects to it — kept as separate entries
-  # even where two happen to share a number today (e.g. nixCacheHttp and
-  # pxeBootHttp are both 80) so changing one service's port can never
-  # silently change an unrelated one.
-  ports = {
-    # nix-cache's nginx reverse proxy in front of nix-serve
-    # (modules/nix-cache/server.nix).
-    nixCacheHttp = 80;
-
-    # pxe-boot's nginx asset server, also used to build pxeBaseUrl
-    # (modules/build-types/pxe-boot.nix).
-    pxeBootHttp = 80;
-
-    # pxe-boot's atftpd TFTP server — UDP, not TCP
-    # (modules/build-types/pxe-boot.nix).
-    pxeBootTftp = 69;
-
-    # `server`'s NFS exports need both the portmapper (rpcbind) and the
-    # NFS data port itself opened (modules/build-types/server.nix).
-    nfsRpcbind = 111;
-    nfsd = 2049;
-
-    # Opened on the docker host's firewall for the Traefik-fronted
-    # container stack (docker-compose config lives in the separate
-    # /home/debian/docker repo, not here): 80/443 are Traefik's own
-    # HTTP/HTTPS listeners; 8080 is an additional exposed service whose
-    # exact backend isn't declared in this repo (modules/build-types/docker.nix).
-    dockerHttp = 80;
-    dockerHttps = 443;
-    dockerExtra = 8080;
-
-    # Beszel monitoring hub, reachable at
-    # http://<dockerHost>.<homeDomain>:<beszelHub> from every agent
-    # (modules/beszel/enable-agent.nix, hosts/nixos/home.nix).
-    beszelHub = 8090;
-
-    # Proxmox VE and Proxmox Backup Server web UIs, opened as desktop
-    # shortcuts on the gui build type (hosts/nixos/home.nix).
-    pveWeb = 8006;
-    pbsWeb = 8007;
-
-    # Tor relay's ORPort — the port other Tor relays connect to for onion
-    # routing traffic (modules/tor/enable-relay.nix). Tor's own conventional
-    # default; opened via services.tor.openFirewall rather than
-    # networking.firewall.allowedTCPPorts directly, but kept here anyway so
-    # it's not a bare literal duplicated between the relay's settings and
-    # anything else that ever needs to reference it.
-    torRelayOrPort = 9001;
-  };
-
-  # .raw disk image size for every proxmox-* host's standalone Disko image
-  # build (modules/disko/proxmox.nix, config.system.build.diskoImagesScript
-  # — see docs/proxmox-images.md). Root fills whatever's left after the ESP
-  # and swap partitions within this total.
-  proxmoxImageSize = "20G";
-
-  # nix-cache's Nix store garbage collection retention
-  # (modules/nix-cache/server.nix).
-  nixCacheGcMaxAge = "30d";
-
-  # Traefik access log rotation, watched on the docker host at
-  # nfsShares.dockerVolumes.mountpoint (modules/traefik/rotate-logs.nix).
-  traefikLogRotate = {
-    maxSize = "100M"; # rotate once a log file exceeds this size
-    keep = 20; # number of rotated logs to retain before deleting the oldest
-  };
-
+  # Well-known ports for LAN services referenced from multiple hosts
+  beszelHubPort = 8090;
+  pveWebPort = 8006;
+  pbsWebPort = 8007;
 }