felhom-controller/CLAUDE.md

CLAUDE.md — Project Instructions for Claude Code (felhom-controller)

Read automatically at session start. Stable orientation only — current state lives in CONTEXT.md and the top of CHANGELOG.md, never here. Cross-repo orientation: workspace-root /mnt/5_hdd/felhom.eu/git/CLAUDE.md.

!!! IMPORTANT !!!

• Always update CHANGELOG.md whenever you modified the code, and pushed to git!!
• IF controller feature changed (new/modify/remove) always update the relevant part of controller/README.md with the architectural change!!

Project overview

Felhom is a managed home-server business for Hungarian customers. This repo contains the felhom-controller — the Go application that manages Docker Compose stacks inside each customer LXC guest via a Hungarian-language web dashboard.

Read in this order:

• REUSE.md — before writing new code (canonical helpers, patterns, traps, seams).
• CONTEXT.md — current project state, decisions, roadmap (update after each session).
• controller/README.md — full feature/architecture reference (update when features change).
• TASK.md — the current task to implement (if it exists).

System context — the three-component model

The project runs on Proxmox, with a locked three-component model:

• Hub (felhom.eu/hub/) — operator backend on k3s.
• Host agent (felhom-agent/) — one per Proxmox host; operator-tier; owns ALL Proxmox interaction.
• In-guest controller (THIS repo) — one per customer LXC; Docker-only; holds NO Proxmox credentials. De-privileged: disk/host/Proxmox concerns are delegated to the host agent via the pinned local-API client (internal/agentapi); the controller keeps the app domain — stack/deploy management, the Hungarian web UI, app-data backup, metrics/telemetry, integrations, git-sync, notifications. Whole-guest backup (PBS vzdump) is the agent's.

Authoritative maps: felhom.eu/documentation/architecture/01/02/03-*.md (topology/trust, controller module map, host agent) + the code-verified feature docs in felhom.eu/documentation/controller/. Match the current code, not summaries, if they drift.

Don't confuse the two ex-"controllers": felhom-agent (host, operator-tier, was proxmox-controller) vs this felhom-controller (in-guest, was deploy-felhom-compose).

Layout (verified against the tree)

controller/cmd/controller/   entry point + startup wiring (scheduler block, init-only setters)
controller/internal/
  agentapi/       pinned-TLS client to the host agent's per-guest local API (THE disk seam)
  api/            REST /api/* router (writeJSON envelope, limitBody, config writes)
  appbackup/      felhom-data paths/namespaces, DB dumps, userdata skeleton (shared primitives)
  appexport/      .fab export/import bundles (password crypto, strict segment validation)
  assets/         app logo/screenshot sync from the hub
  backup/         app-data backup manager, recovery units, tier-2 copies, offbox restic
  bootstrap/      bootstrap.json ingest → controller.yaml (Day-0 + refresh)
  channelhealth/  agent-channel health checker (debounce + born-down alerting)
  cloudflare/     geo-enforcement remnant (agent-delegated)
  config/         controller.yaml load/validate (LoadPermissive = setup-mode only)
  crypto/         AES-256-GCM app.yaml secret encryption (ENC: prefix)
  infra/          traefik/cloudflared/filebrowser base-stack templates
  integrations/   app-to-app integrations (e.g. OnlyOffice)
  mailrelay/      app-email SMTP shim → hub relay
  metrics/        telemetry collection
  monitor/        health checks, protected containers
  notify/         hub event push (typed Notify* wrappers)
  quiesce/        quiesce loop for whole-guest backup (marker + recover)
  recovery/       recovery-unit restore
  report/         hub report builder/pusher + pull-based config refresh
  scheduler/      background jobs (Every/Daily, Budapest DST-safe)
  selftest/       startup self-checks
  selfupdate/     controller image self-update via the agent swap
  settings/       settings.json persistence (registry, flags, corruption recovery)
  setup/          first-boot setup wizard (own CSRF)
  stacks/         compose ops: deploy/delete/migrate/state (THE app domain core)
  sync/           git-sync of the app catalog
  system/         mounts/probes (linux + permissive _other stubs)
  util/           small shared helpers
  web/            dashboard UI: server, auth/CSRF, handlers, funcmap, templates (Hungarian)

Per-package helpers/seams/traps: REUSE.md (maintained same-commit as helper changes).

Conventions & cardinal rules

• Trunk-based — no branches. All shippable work commits directly to main; main equals what is deployed. Report-only artifacts → felhom.eu/documentation/ (audits/, backlog/). Risky fixes are implemented during the supervised session itself, on main; if a fix can't be verified/shipped, revert + report — never park on a branch.
• Code quality: double-check for bugs/edge cases; add debug logging; ask rather than guess.
• All UI text is Hungarian (Budapest timezone). Design tokens/gates: use the felhom-ui-design skill; templates must pass controller/scripts/template_id_gate.py + emoji_gate.py.
• Testing doctrine (non-hollow tests, red-proofs, seams): use the felhom-testing skill.
• Logging: new leveled lines use internal/logx (DEBUG always reaches the debug ring; stdout respects logging.level); English, keys-never-values, durations on outcomes — full rules in felhom.eu/documentation/runbooks/logging-conventions.md.
• Update REUSE.md if you added/changed/deprecated a shared helper or pattern (same commit).
• Coupled features (controller behavior that depends on a specific agent version): add a featureProbes table row in internal/agentapi/features.go + a Supports gate call at the feature's entry point; declare MinAgent: X.Y.Z in the CHANGELOG entry header. Rules: felhom.eu/documentation/runbooks/publish-train-rules.md.

In every repository where you make a change, update both files in that repo:

• CHANGELOG.md — cumulative log, newest on top.
• REPORT.md — overwrite with the most recent implementation/validation summary only.

Never write secrets into any committed file — reference them as "stored out-of-band".

Live validation

Exercise the SERVER-SIDE PIPELINE a real user triggers, end-to-end (connect → enroll → deploy). The forbidden shortcut is BYPASSING that pipeline (the F9 episode: raw agent guest-attach + hand-set state). claude-in-chrome is NOT available in the DooPlex environment — the standard method is endpoint-level: invoke the exact endpoint the UI invokes (no server logic is skipped, only rendering) and say which method was used. Strict end-to-end UI coverage is a manual click-through.

Two traps in that method, both from the 2026-07-20 remediation:

• Grep the fetched page with ASCII-only substrings. Accented Hungarian patterns get mangled through the ssh → pct exec → bash -c chain and return a false 0 — which reads exactly like the banner/string being gone. Use kezel, Utols, Biztons; never let an accented pattern gate a conclusion (it nearly produced a wrong "banner cleared" claim).
• Credentials with ! or ' break in heredoc-built helper scripts (history expansion eats !!). Use the proven inline -d "password=$PW" form for authed curl, and delete any credential-bearing helper from /tmp (host AND guest) when done.

Environment & access

Claude Code runs on DooPlex (192.168.0.180, Debian 13, user kisfenyo); repos in /mnt/5_hdd/felhom.eu/git/, build dirs in /mnt/5_hdd/felhom.eu/build/. All repos hosted at gitea.dooplex.hu/admin/. Builds are local commands; felhom-pve is one SSH hop.

Host	Access	Role
DooPlex (this host)	local — /mnt/5_hdd/felhom.eu/{git,build}/	build + push images, sudo kubectl
Demo Proxmox host demo-felhom	ssh felhom-pve (root@192.168.0.162)	pct into guests; live validation
Demo guest 9201	ssh felhom-pve "pct exec 9201 -- ..."	the live demo controller (golden/bootstrap-managed)
felhotest (legacy)	ssh -p 33022 kisfenyo@router.abonet.hu	OLD /opt/docker compose mechanism

Legacy: Windows workstation. Until 2026-07-19 CC ran on Windows 11 with repos in E:\git\, and every remote command needed SSH=/c/Windows/System32/OpenSSH/ssh.exe (Git Bash's ssh lacks the Windows agent and fails silently — see docs/vscode-ssh-fix.md), plus MSYS_NO_PATHCONV=1 for pct exec. Retained in case that environment is revived.

TEMPORARY — felhom-pve is at a remote site (until ~2026-08-02). The home-LAN literal 192.168.0.162 is NOT reachable from DooPlex for the duration. Access via Tailscale: felhom-pve = 100.70.170.35; the Host felhom-pve entry in ~/.ssh/config on DooPlex already points there (the direct-LAN path stays available as Host felhom-pve-lan). Delete this block on return. All documented ssh felhom-pve / pct exec workflows are unchanged. Path is direct (not DERP), ~37 ms rtt per hop. At the remote site the host is on DHCP and currently holds 192.168.0.147 (the guest holds .104); no Pi-hole there — the guest reaches gitea.dooplex.hu and *.demo-felhom.eu via public paths. The host agent is DOWN for the duration: its localapi binds the literal 192.168.0.162, which no longer exists → bind: cannot assign requested address, so every agent-backed feature (storage, PBS backup, quiesce, restore-test, DR) is unavailable until fixed. Details + findings: felhom.eu/documentation/audits/AUDIT-vacation-remote-ops-2026-07-20.md

External access via Cloudflare Tunnel → Traefik; Pi-hole forwards *.demo-felhom.eu → .162 locally.

Build & deploy — MANDATORY after code changes

Full runbook: use the felhom-build-deploy skill. Summary (guest 9201 is bootstrap-managed — no compose file; felhom-controller-bootstrap.service runs the tag in /etc/felhom-controller-image):

Clean-tree gate before any build: git status --porcelain must be empty and git rev-parse HEAD must equal git rev-parse origin/main in the repo being built. An unpushed change does not exist — never build a dirty or unpushed tree. The git pull in the build step stays (it is a no-op when you work in this tree, and load-bearing if anything was pushed from elsewhere).

Step	Command
1. Commit + push	git add <explicit paths> && git commit -m "..." && git push
2. Build + push image	cd /mnt/5_hdd/felhom.eu/build/felhom-controller && git -C /mnt/5_hdd/felhom.eu/git/felhom-controller pull && ./build.sh <VER> --push (build.sh does NOT pull — the explicit pull is load-bearing)
3. Deploy (9201)	ssh felhom-pve "pct exec 9201 -- bash -c 'docker pull gitea.dooplex.hu/admin/felhom-controller:<VER> && echo gitea.dooplex.hu/admin/felhom-controller:<VER> > /etc/felhom-controller-image && systemctl restart felhom-controller-bootstrap.service'"
4. Verify	ssh felhom-pve "pct exec 9201 -- docker ps --filter name=felhom-controller --format '{{.Image}} {{.Status}}'" + container logs

Hub build/deploy lives in felhom.eu (GitOps) — see that repo's CLAUDE.md / the skill. Catalog changes (app-catalog-felhom.eu): commit+push; controller sync picks them up ≤15 min or via the "Sablonok frissítése" button.

Session-critical invariants (the rest live in REUSE.md)

• docker compose restart does NOT pick up new images/env — always up -d (RedeployFromEnv).
• Docker's .State says "running" even for unhealthy containers — .Status parse is the truth.
• In-memory Deployed flag is set BEFORE compose up -d (slow-pull race); reverted on failure.
• compose up -d exits 0 on crash-loops — post-start status check is the detection.
• Env var KEYS are logged, never values. Protected stacks (traefik, cloudflared, felhom-controller) can't be stopped from the UI.
• Verify a container image HAS the healthcheck tool before using it (BusyBox wget / python3 / curl — catalog REUSE.md maps the families).

Working with CHANGELOG.md

DO NOT read the full file — it is large and will waste context.

• Session start: use CONTEXT.md + controller/README.md for current state.
• Adding an entry: Read only the top ~30 lines for format, then Edit-insert after line 1.
• History: Grep for topics instead of reading.

End-of-session checklist

1. Commit and push all code changes
2. Build, push, and deploy the new controller image (if controller code changed)
3. Update CHANGELOG.md with what was done
4. Update CONTEXT.md with decisions made, state and what's next
5. Update controller/README.md if architecture or features changed
6. Verify the deployment is working (check docker ps and logs)
7. Update REUSE.md if you added/changed/deprecated a shared helper or pattern (same commit)