Removes virtualisation.docker.autoPrune (daily `docker system prune --all` evicted in-use base
images → cold re-pull → Hub rate-limit churn, JOURNAL-2). Adds modules/docker-prune.nix: daily
timer + oneshot that prunes only dangling+until=24h, gated on disk pressure (>=80%) AND no run-app
live AND no swarm service converging; never --all, never --volumes. Teardown unchanged (never
removes images). Registry pull-through cache dropped per operator scope correction.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The autoPrune flags passed '--volumes' WITH '--filter until=24h', which docker
rejects ('until filter not supported with --volumes') — so docker-prune.service
FAILED every day (system 'degraded') and never reclaimed anything (a cause of the
disk creeping to 96%). Worse, '--volumes' prunes volumes with no running
container — which would DELETE Phase-2w DATA-WARM canonical volumes (undeployed by
design). Removed '--volumes': now prunes images/containers/networks/build-cache
older than 24h only; warm volumes survive and are pruned deliberately by the warm
reconcilers (WC8).
Verified: nixos-rebuild switch -> docker-prune.service runs clean, system
'running' (0 failed units), warm keycloak still 200.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
flake.nix/flake.lock STAY at root so the build ref #cc-ci is unchanged; only flake's internal
configuration.nix path updated. Root-relative refs inside moved modules re-based ../X -> ../../X
(secrets/bridge/dashboard); configuration.nix's ../../modules imports unchanged (both dirs under nix/).
Living docs (README, architecture/install/secrets/enroll) + .drone.yml comment updated to nix/...;
append-only history logs left as-is. DECISIONS.md records RL5 + the deferred-coordinated RL6.
Verified on cc-ci: nixos-rebuild build 'path:#cc-ci' -> toplevel 8i3jcad9 (BYTE-IDENTICAL to the
pre-move build — store derivations are content-addressed on file contents, module .nix not in the
runtime closure); scripts/lint.sh -> lint: PASS.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
