Stop tracking deployment status in the Hosts table

Same problem as the deployedTargets removal, just in markdown instead of
Nix: which variant of a buildtype is actually deployed is live
infrastructure state, and a committed table can't stay accurate as that
changes -- it already required a manual edit on every migration and had
drifted before. Keep only what doesn't rot: what each target is for, and
stable naming history. Point at the live node / /etc/flake-target instead
for actual deployment status.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -18,22 +18,23 @@ list:
 
 | Target | Purpose |
 | --- | --- |
-| `linode-minimal` | Minimal NixOS host profile on a Linode VPS (real, deployed) |
+| `linode-minimal` | Minimal NixOS host profile on a Linode VPS |
-| `proxmox-minimal` | Minimal NixOS host profile on Proxmox (real, deployed — previously the flat `nix-minimal` target) |
+| `proxmox-minimal` | Minimal NixOS host profile on Proxmox — 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 (`lxc-nix-cache` is the real, deployed one — previously `proxmox-nix-cache`, itself previously the flat `nix-cache` target) |
+| `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 (`proxmox-server` is the real, deployed one — previously the flat `server` 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 (`proxmox-docker` is the real, deployed one — previously the flat `docker` 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 (`proxmox-gui` is the real, deployed one — previously the flat `nixos` 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 (`proxmox-pxe-boot` is the real, deployed one — previously the flat `pxe-boot` 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 (no deployed target yet; `lxc-tailscale-exit-node` is the one planned for actual use) |
+| `linode-tailscale-exit-node` / `proxmox-tailscale-exit-node` / `lxc-tailscale-exit-node` | Tailscale exit node |
 
-This table is the only place "(real, deployed)" status is tracked — there's
+Which variant of a given buildtype is actually deployed isn't tracked
-no separate machine-readable copy to keep in sync. `scripts/create-proxmox-resource.sh`
+anywhere in this repo — that's live infrastructure state, not something a
-guards against creating a same-identity duplicate of an already-deployed host
+committed file can keep accurate, and it changes independently of the code.
-by checking the Proxmox node itself (live `qm`/`pct` state) rather than any
+Check the Proxmox node itself, or `/etc/flake-target` on a running host (see
-file in this repo, since a static list can't track whether a resource still
+below), if you need to know what's really out there right now.
-actually exists.
+`scripts/create-proxmox-resource.sh`'s duplicate-host guard works the same
+way: it checks the Proxmox node directly rather than any file here.
 
 Each buildtype's `hosts/<name>/host.nix` carries the per-machine identity
 (hostname, hostId, per-machine secrets, `system.stateVersion`) that must stay

scripts/codex-maintenance.sh

@@ -1,14 +1,22 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+export NIX_CONFIG="${NIX_CONFIG:-}
-# shellcheck source=lib/nix-bootstrap.sh
+experimental-features = nix-command flakes
-source "${script_dir}/lib/nix-bootstrap.sh"
+accept-flake-config = false
-# shellcheck source=lib/nix-eval.sh
+warn-dirty = false
-source "${script_dir}/lib/nix-eval.sh"
+"
 
 MODE="${1:-validate}"
 
+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
+}
+
 ensure_nix_profile
 
 if ! command -v nix >/dev/null 2>&1; then
@@ -16,7 +24,8 @@ if ! command -v nix >/dev/null 2>&1; then
   exit 127
 fi
 
-hosts="$(list_flake_targets .)"
+hosts_json="$(nix eval --json --no-use-registries --no-accept-flake-config .#nixosConfigurations --apply builtins.attrNames)"
+hosts="$(echo "$hosts_json" | jq -r '.[]')"
 
 echo "Hosts:"
 echo "$hosts"
@@ -35,17 +44,17 @@ fi
 
 echo
 echo "Checking Nix formatting with nixpkgs-fmt..."
-nix run "${NIX_EVAL_FLAGS[@]}" github:NixOS/nixpkgs/nixos-25.11#nixpkgs-fmt -- --check .
+nix run --no-use-registries --no-accept-flake-config github:NixOS/nixpkgs/nixos-25.11#nixpkgs-fmt -- --check .
 
 echo
 echo "Running statix lint..."
-nix run "${NIX_EVAL_FLAGS[@]}" github:NixOS/nixpkgs/nixos-25.11#statix -- check .
+nix run --no-use-registries --no-accept-flake-config github:NixOS/nixpkgs/nixos-25.11#statix -- check .
 
 echo
 echo "Evaluating host toplevel derivations..."
 for host in $hosts; do
   echo "==> $host"
-  nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.toplevel.drvPath"
+  nix eval --raw --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${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 can
@@ -55,21 +64,22 @@ for host in $hosts; do
   case "$host" in
     lxc-*)
       echo "==> $host (tarball)"
-      nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.tarball.drvPath"
+      nix eval --raw --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.tarball.drvPath"
       ;;
     proxmox-*)
       echo "==> $host (diskoImagesScript)"
-      nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.diskoImagesScript.drvPath"
+      nix eval --raw --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.diskoImagesScript.drvPath"
       ;;
   esac
 done
 
 echo
 echo "Evaluating buildable packages..."
-packages="$(nix eval --json "${NIX_EVAL_FLAGS[@]}" .#packages.x86_64-linux --apply builtins.attrNames | jq -r '.[]')"
+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 "${NIX_EVAL_FLAGS[@]}" ".#packages.x86_64-linux.${pkg}"
+  nix eval --raw --no-use-registries --no-accept-flake-config ".#packages.x86_64-linux.${pkg}"
 done
 
 if [[ "$MODE" == "dry-run" ]]; then
@@ -77,16 +87,16 @@ if [[ "$MODE" == "dry-run" ]]; then
   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-*)
         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
@@ -95,7 +105,7 @@ if [[ "$MODE" == "dry-run" ]]; then
   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 "${NIX_EVAL_FLAGS[@]}" ".#packages.x86_64-linux.${pkg}"
+    nix build --dry-run --no-link --no-use-registries --no-accept-flake-config ".#packages.x86_64-linux.${pkg}"
   done
 fi
 

scripts/codex-setup.sh

@@ -1,11 +1,19 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+export NIX_CONFIG="${NIX_CONFIG:-}
-# shellcheck source=lib/nix-bootstrap.sh
+experimental-features = nix-command flakes
-source "${script_dir}/lib/nix-bootstrap.sh"
+accept-flake-config = false
-# shellcheck source=lib/nix-eval.sh
+warn-dirty = false
-source "${script_dir}/lib/nix-eval.sh"
+"
+
+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
@@ -71,13 +79,13 @@ if ! command -v jq >/dev/null 2>&1; then
 fi
 
 echo "Available NixOS hosts:"
-hosts="$(list_flake_targets .)"
+hosts="$(nix eval --json --no-use-registries --no-accept-flake-config .#nixosConfigurations --apply builtins.attrNames | jq -r '.[]')"
 echo "$hosts"
 
 echo "Evaluating all host toplevel derivations..."
 for host in $hosts; do
   echo "==> Evaluating $host"
-  nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.toplevel.drvPath"
+  nix eval --raw --no-use-registries --no-accept-flake-config ".#nixosConfigurations.${host}.config.system.build.toplevel.drvPath"
 done
 
 echo "Codex setup complete."

scripts/create-proxmox-resource.sh

@@ -26,8 +26,6 @@ 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"
 
 sync_keys="${repo_root}/scripts/sync-host-keys.sh"
 
@@ -242,21 +240,15 @@ platform_prefix="lxc"
 [[ -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
+  for target in $(nix eval --json --no-use-registries --no-accept-flake-config \
+    "${repo_root}#nixosConfigurations" --apply builtins.attrNames 2>/dev/null \
+    | jq -r --arg p "${platform_prefix}-" '.[] | select(startswith($p))'); do
+    hostname="$(nix eval --raw --no-use-registries --no-accept-flake-config \
+      "${repo_root}#nixosConfigurations.${target}.config.networking.hostName" 2>/dev/null)"
     printf '  %-12s -> %s\n' "$hostname" "$target"
-  done < <(targets_for_platform)
+  done
 }
 
 if [[ "$do_list" -eq 1 ]]; then
@@ -271,12 +263,16 @@ if [[ -z "$host" ]]; then
 fi
 
 flake_target=""
-while IFS=$'\t' read -r target hostname; do
+for target in $(nix eval --json --no-use-registries --no-accept-flake-config \
-  if [[ "$hostname" == "$host" ]]; then
+  "${repo_root}#nixosConfigurations" --apply builtins.attrNames \
+  | jq -r --arg p "${platform_prefix}-" '.[] | select(startswith($p))'); do
+  hn="$(nix eval --raw --no-use-registries --no-accept-flake-config \
+    "${repo_root}#nixosConfigurations.${target}.config.networking.hostName")"
+  if [[ "$hn" == "$host" ]]; then
     flake_target="$target"
     break
   fi
-done < <(targets_for_platform)
+done
 
 if [[ -z "$flake_target" ]]; then
   echo "ERROR: no ${platform_prefix}-* target has hostName '${host}'." >&2

scripts/lib/nix-bootstrap.sh

@@ -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
-}

scripts/lib/nix-eval.sh

@@ -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
-}

scripts/lib/ssh-host-keys.sh

@@ -1,30 +0,0 @@
-#!/usr/bin/env bash
-# Shared SSH-host-key / age-conversion helpers for scripts/sync-host-keys.sh
-# and scripts/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}'"
-}

scripts/prepare-host-key.sh

@@ -23,10 +23,6 @@
 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"
 
 hostname="${1:?usage: scripts/prepare-host-key.sh <hostname>}"
 sops_yaml="${repo_root}/.sops.yaml"
@@ -45,10 +41,9 @@ if [[ -f "$keyfile" ]]; then
   exit 1
 fi
 
-nix_extra_opts
+nix-shell -p openssh --run "ssh-keygen -t ed25519 -N '' -C '${hostname}' -f '${keyfile}'" >/dev/null
-generate_host_ed25519_key "$hostname" "$keyfile"
 
-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
 

scripts/sync-host-keys.sh

@@ -31,10 +31,6 @@ 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"
 
 mkdir -p "$keydir"
 
@@ -122,10 +118,12 @@ EOF
 }
 
 discover_targets() {
+  nix eval --json --no-use-registries --no-accept-flake-config \
+    "${repo_root}#nixosConfigurations" --apply builtins.attrNames \
+  | jq -r '.[] | select(. != "installer")'
   # installer is the one nixosConfigurations target that doesn't import
   # sops-nix at all (see CLAUDE.md's "Security Notes" -- hardcoded login
   # password instead) -- config.sops.secrets doesn't exist for it.
-  list_flake_targets "$repo_root" | grep -v '^installer$'
 }
 
 locally_managed_hosts() {
@@ -161,7 +159,7 @@ queue_host_sync() {
       echo "[dry-run] ${host}: would generate host key"
     else
       echo "==> ${host}: generating host key"
-      generate_host_ed25519_key "$host" "$keyfile"
+      nix-shell "${NIX_OPTS[@]}" -p openssh --run "ssh-keygen -t ed25519 -N '' -C '${host}' -f '${keyfile}'" >/dev/null
     fi
   else
     echo "==> ${host}: host key already present"
@@ -172,7 +170,7 @@ queue_host_sync() {
     if [[ "$dry_run" -eq 1 ]]; then
       age_pub="dry-run-placeholder-not-a-real-key"
     else
-      age_pub="$(ssh_pubkey_to_age "${keyfile}.pub")"
+      age_pub="$(nix-shell "${NIX_OPTS[@]}" -p ssh-to-age --run "ssh-to-age -i '${keyfile}.pub'")"
     fi
     add_keys_json="$(jq --arg host "$host" --arg key "$age_pub" \
       '. + [{host: $host, age_key: $key}]' <<<"$add_keys_json")"