Add SECURITY.md covering the threat model, trust boundaries,
proportionate kernel/process hardening, the update/reboot routine and
remaining prioritized work. Record the dated read-only audit findings
(listeners, privileged workloads, effective RBAC, secret metadata and
sandbox/SSH boundaries) separately from planned controls and runtime
verification.
Define agent-first diagnosis: scoped root read-only access on homelab
hosts, and normal-user diagnostics on core desktops with no new sudo
grants. Add canonical domain-based k3s API endpoint regression tests,
record the unverified Darwin secret-ownership concern as WA-015, and
correct comments claiming mode 0000 blocks privileged root.
muvm is disabled because it does not build/run on nixos-apple-silicon yet, not because of a permanent hardware limitation; the 16k page size is the reason it is wanted, and the removal condition is muvm building and working.
WORKAROUNDS.md collects temporary workarounds, version pins, carried patches, and known gaps, each with a removal condition, so they can be re-evaluated and rolled back on a schedule. AGENTS.md points to it and states the convention: a change that adds a workaround adds a row in the same PR.
Replace the backported patch with a src/version/vendorHash override that pins prometheus-smartctl-exporter to upstream 6274decc (2026-09-28), which already carries the Describe() fix from PR #329. Simpler to maintain than a patch file and it tracks the upstream change directly; drop the overlay once smartctl_exporter 0.15.0 is packaged in nixpkgs.
smartctl_exporter 0.14.0 derives Describe() from the devices it can read at startup. A device that only becomes readable later (an NVMe whose ACL arrives late, or an HDD waking from standby) then makes Collect() emit metrics with unregistered descriptors, so /metrics returns HTTP 500 and the whole scrape fails, hiding even the healthy disks.
Backport upstream PR #329, which makes Describe() send the full explicit descriptor set. Carry it as an overlay until smartctl_exporter 0.15.0 is released and packaged in nixpkgs.
Refs: https://github.com/prometheus-community/smartctl_exporter/pull/329
test-instrumentation.nix sets serial-getty@ttyS0.enable = false at normal priority to keep ttyS0 free for the test backdoor console, while qemu-guest.nix set it to true at normal priority. Two conflicting normal-priority definitions made `nix flake check` fail while evaluating packages.x86_64-linux.ruby-nixos-tests.
Use lib.mkDefault so the test framework wins in tests while ordinary QEMU guests still enable the serial getty.
* fix(colmena): expose colmenaHive for the new evaluator
nixpkgs now ships the nix-community Colmena rewrite, whose default
evaluator reads an evaluated colmenaHive flake output instead of the raw
colmena hive. Without it every colmena apply recipe failed with
"does not provide attribute colmenaHive".
Add a colmena input pinned to the same v0.5.0 as nixpkgs and expose
colmenaHive = colmena.lib.makeHive <raw hive>, with the raw hive kept as
an internal binding rather than a flake output of its own.
* chore: clean up stale colmena and aquamarine references
- point the Colmena links at nix-community/colmena after the move
- rename the security-aquamarine-metrics test to youko-metrics (it
already tested youko) and update the outputs README
- drop the commented aquamarine remote-builder example
* chore(workarounds): re-evaluate stale hardware/kernel fixes
Prune workarounds whose root cause is gone, fix one vendor typo, and
document the ones we keep:
- drop `transparent_hugepage=madvise` on shoryu/shushou/youko: it was tied to
the old fixed 1G hugetlb pool, and the VMs now use ordinary memory
- shoryu: `hardware.cpu.intel.updateMicrocode` -> `amd` (it is an AMD APU)
- ai: drop `i915.enable_guc=3` (GuC/HuC submission is the default on modern
i915/Xe)
- kernel-hardening: name the Dirty Frag CVEs (CVE-2026-43284 / CVE-2026-43500)
and the re-evaluation condition
- document re-eval conditions for the Insta360 resume fix, the darwin
auto-optimise-store workaround, and the youko USB-SATA bridge mitigations
* chore(workarounds): keep the Dirty Frag module blacklist as defence in depth
* chore(ai): correct the i915.enable_guc rationale (verified against the kernel)
* chore(darwin): drop the auto-optimise-store workaround (nix#7273 fixed)
* fix(ai): relax NVMe power-management workarounds and enable smartd
Logs show no NVMe errors, so allow APST again (capped at 100 ms), restore
the default io_timeout, and drop pcie_aspm=off. Add smartd for drive
health visibility.
* feat(storage): add drive/SSD SMART monitoring on physical hosts
node_exporter's nvme collector only exposes node_nvme_info and namespace
capacity, not SMART health, so SSD wear/lifespan and drive temperature were
not observable anywhere.
- enable services.prometheus.exporters.smartctl on physical hosts, gated on
modules.hardwareTools (off on QEMU/MicroVM guests), bound to the host's LAN
address on port 9633
- firewall: drop 9633 from anything but the monitoring host
- youko: scrape smartctl-<host> for the physical hosts
- alert rules (storage.yml): SMART health, NVMe wear, available spare, media
errors, critical warning, and drive temperature (warn 70 / crit 80 C)
- Grafana dashboard "Drive SMART (smartctl)"
agenix was pinned to a May 2025 revision, so `just up` could never move
it. Move to the 0.18.0 release tag and collapse its duplicate
nix-darwin/home-manager lock nodes via follows.
Remove a dead .gitattributes rule, bump the mirror workflow's checkout,
document the daemon test settings, drop unused JACK, and align the
installer's disko version.
* fix(ci): fail the eval-test run when the suite does not pass
`nix eval .#evalTests` prints the suite result but exits 0 either way, so
both `just test` and the CI workflow reported success even when a test
failed. Compare the raw boolean and fail instead.
* fix(ci): use --json for the boolean eval result
`nix eval --raw` cannot coerce a Boolean to a string, and Just runs each
recipe line as a separate `nu -c`, so the result variable must stay on one
line.
* feat!: replace zellij with tuios and switch to ghostty + kitty
Terminal environment overhaul:
- add the tuios flake input (upstream 0.8.5; nixpkgs has 0.8.1) and link
the checked-in config out-of-store; auto-start tuios in nushell instead
of zellij
- remove zellij entirely: both modules, config, README and nushell
completions
- remove foot and alacritty, which lack the Kitty graphics protocol;
Reuse the already-extracted, libtiff-patched AppImage from the nixpkgs wechat package (`wechat.src`) instead of keeping our own CDN URLs and hashes, which had to be refreshed whenever Tencent replaced the versionless files. Take the package from nixpkgs-master, which carries the newest builds.
- wechat.nix: repacking is needed because nixpkgs' wechat package does not expose its AppImage wrapper args for `.override`, not because wrapAppImage lacks overriding (it forwards args to buildFHSEnv).
- peripherals.nix: drop a link to an already-closed issue and fix a typo.
nixpkgs-blender tracked the nixpkgs master branch, so every `just up` re-bumped it and started a full Blender/CUDA source rebuild even though Blender stayed at 5.2.2 LTS. Pin it to a fixed rev so bumps are deliberate.
The OIDN cmake override is obsolete: nixpkgs#545542 made setupCudaHook add nvcc to CUDAToolkit_ROOT, fixing the CMake 4.3+ split-root failure (nixpkgs#544701). Dropping it also stops Blender's derivation from depending on nixpkgs-stable.
environment.enableAllTerminfo installs every terminal's terminfo, including rxvt-unicode, which no longer builds with GCC 16 (NixOS/nixpkgs#568896). Install just the terminals we use (alacritty, foot, ghostty, kitty) instead. This also makes the aarch64 jasper workaround unnecessary.
16 inputs moved; nixpkgs -> c59305bab206 (nixos-unstable, 2026-10-01), plus the
master/stable/darwin/blender/patched nixpkgs inputs and the module flakes
(home-manager, microvm, nixos-apple-silicon, nix-gaming, nixpak, llm-agents,
rust-overlay, flake-parts, git-hooks, nu_scripts).
Audited each moved revision through the GitHub compare API: no red flags
(substituters, trusted-users, activationScript, pre-commit hooks) in the inputs
examined. home-manager carries the rl-2611 extraConfig/mkForce change (affects
mbsync/lieer/mujmap/notmuch/astroid/grobi; none used here). The home-manager
compare is large, so the audit is not exhaustive and relies on the build.
Validated with `just test` (true), eval-host on the NixOS hosts, and
`just build-host ai-niri`; deployment passed. The build initially failed on
rxvt-unicode-unwrapped (GCC 16 std::lerp regression, nixpkgs#568896), pulled in
by environment.enableAllTerminfo; terminfo is now scoped to the terminals in use.
* feat(idols-ai): persist /var/tmp and small state dirs, wipe /var/tmp at boot
Move the strata model staging area (~3G) off the root tmpfs onto the
persistent btrfs volume to free RAM, preserve btrbk/cups/logrotate
state, and wipe /var/tmp at boot so it only accumulates between
reboots.
* chore(idols-ai): add nosuid,nodev to root tmpfs and tmp btrfs mounts
Hardens /, /tmp and /snapshots; safe because /dev, /run, /nix and
/run/setuid-programs are separate mounts, so nothing there needs suid
bits or device nodes.
* chore(idols-ai): add noatime to the @tmp btrfs mount
Temp files do not need access times; matches the @nix subvolume style
and saves btrfs metadata writes.
* chore(idols-ai): harden the /var/tmp bind mount with nosuid,nodev
World-writable staging data should not honor suid bits or device
nodes, same as /tmp and /snapshots.
* fix(idols-ai): preserve logrotate state as a file, fix persisted dir ownership
- /var/lib/logrotate.status is a regular file, not a directory: move it from
preservation directories to files. A missing state entry makes logrotate
treat every log as freshly rotated, so it must survive reboots.
- keep /var/lib/btrbk owned by btrbk:btrbk 0750 so preservation does not
override the btrbk module's rule with root:root.
- set /var/tmp mode 1777 explicitly instead of relying on systemd's tmp.conf
ordering.
- rewrite comments to describe the paths generically.
* chore(idols-ai): cap journal, wipe coredumps at boot, persist upower/noctalia
- services.journald.settings.Journal: SystemMaxUse=10G, RuntimeMaxUse=256M,
matching the cap already set on idols-kana/idols-ruby.
- wipe /var/lib/systemd/coredump at boot: it lives in the persisted
/var/lib/systemd and crash dumps can contain secrets copied from memory.
- persist /var/lib/upower (device battery history) and
~/.local/state/noctalia (shell settings, notification/clipboard history).
Running strata with qwen3.8-flash-next keeps ~53G of model weights
resident, leaving little RAM for the desktop side and pushing ~13G of
anonymous pages into the 20G swapfile. With swap that full, a burst
risks OOM-killing processes. Disk space is not a constraint (1.9T
btrfs, ~1.4T free), so grow the swapfile to the classic 1x-RAM size.
Keep zram off and zswap at 10%: zram's compressed pool would steal page
cache that the mmap'd weights rely on.
Prefer the narrowest output of a dependency (for example stdenv.cc.cc.lib
instead of stdenv.cc.cc) and measure the built closure, since a full
toolchain can add hundreds of MiB. Also note how to check what is actually
needed (DT_NEEDED, exec'd tools) before trimming.
Disable the rootful system podman.socket on desktop hosts and drop the module's autoPrune, which prunes the rootful store and pulls in the rootful API service. Add a weekly per-user timer that prunes the rootless store instead.
Manage ~/.config/go-musicfox/config.toml declaratively: the upstream default plus the mpv engine, ~/Music download dir, 2 GiB cache and cover art.
The app rewrites the file with a temp file plus rename, which would replace a plain symlink, so use force = true like fcitx5's profile: the repo copy is restored on every rebuild and runtime edits are ephemeral. Runtime data and state stay on the persistent volume.
* feat(secrets): add work gitconfig secret, symlink it in home-manager
* feat(secrets): add a no-sudo replace recipe for new secrets
* refactor(secrets): move work gitconfig symlink into the desktop layer
* docs(skills): point nix-config-secrets at the private repo under ~/codes
Record where the private nix-secrets checkout lives and that agents should
do the mechanical secret work themselves, handing back only the
interactive/sudo agenix operations and pushes.
* docs(agents): add related repositories to nix-config
* chore(agents): adopt ~/src for source checkouts
Move third-party/source checkouts from ~/codes/src to ~/src so the home
layout reads as three siblings: ~/codes (personal), ~/work (work),
~/src (checkouts). Preserve and back up the new path, and update the
global rule and the two nixpkgs skill references.
* docs(agents): tighten the code layout rule
* docs(agents): fold the work-confidentiality note into the layout line
* docs(agents): base the confidentiality rule on repo visibility
* docs(agents): drop the stale KubeVirt mention
ryan4yin | 二花
ryan4yin | 二花