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

Read automatically when Claude Code works in this repo. Stable orientation only — current state lives in CONTEXT.md and the tops of hub/CHANGELOG.md / scripts/CHANGELOG.md / website/CHANGELOG.md, never here. Cross-repo orientation (the felhom system, artifact taxonomy, access): workspace-root /mnt/5_hdd/felhom.eu/git/CLAUDE.md; this file is felhom.eu-specific. A versioned copy of that workspace file lives at documentation/runbooks/workspace-CLAUDE.md.

Project overview

This repo contains:

  • Website (website/) — static HTML at felhom.eu, served via k3s nginx + git-sync sidecar.
  • Hub (hub/) — Go application (felhom-hub), the operator backend, on k3s at hub.felhom.eu.
  • K8s manifests (manifests/) — k3s deployment manifests for felhom-system services.
  • Architecture docs (documentation/) — the authoritative design home for the whole Felhom system: architecture/01..05-*.md, proxmox-platform.md, tests/phase*-findings.md, runbooks, audits. Read these before designing.
  • Skills (skills/) — the versioned source of the Claude Code skills (felhom-build-deploy, felhom-ui-design, felhom-testing, felhom-app-catalog); install/update with python3 scripts/install_skills.py (symlink into ~/.claude/skills/ on POSIX, junction on Windows — either way repo edits are live immediately).

See README.md for full architecture/DNS/email/SEO docs. See TASK.md for the current task (if any). See REUSE.md before writing new code.

The Felhom system (so the hub's role is in context)

Felhom is Proxmox-based, with a locked three-component model:

  • Hub (this repo, hub/) — operator backend. Authors operator intent; mirrors box reality; holds no data-plane role and never connects inbound to a box.
  • Host agent (repo felhom-agent/) — one per Proxmox host; owns all Proxmox interaction.
  • In-guest controller (repo felhom-controller/) — one per customer LXC; Docker-only.

Hub — architecture (version-free; current version = manifests/hub.yaml image tag)

The hub ingests two report streams — the agent's host-domain report (POST /api/v1/host-report, the heartbeat/dead-man's-switch) and the legacy controller report (POST /api/v1/report, frozen until the slice-10 cutover — do not modify) — plus structured controller events (POST /api/v1/event, gated by allowedEventTypes). Around them: staleness/disk/storage-fill/leaf/capability monitor checkers, the two-tier notification dispatcher (operator English / customer Hungarian, Resend, cooldowns), the app-mail relay, customer-config + Day-0 artifact-manifest management (the checksum trust root the host bootstrap verifies against), assets serving, and the password-gated operator web UI. Package map, helpers, seams, extension points: REUSE.md (e.g. new event types must enter allowedEventTypes + customerMessages together).

Code quality rules

  • Always double-check generated code for bugs, logic issues, syntax errors.
  • Handle edge cases without overcomplicating.
  • Add debug capabilities (logging, verbose output).
  • If you need more input or troubleshooting output, ask first — don't guess.
  • Testing doctrine (non-hollow tests, red-proofs, seams): use the felhom-testing skill.
  • UI/design work (tokens, gates, copy rules): use the felhom-ui-design skill.
  • Logging: levels/English/no-secrets rules per documentation/runbooks/logging-conventions.md (DEBUG = flow detail, INFO = state change + duration; logs are operator-tier English; keys never values — the hub's bundle secret-gate blocks violating pulls fail-closed).

Workflow & artifacts

The planning/architecture assistant ("project Claude", in claude.ai) writes specs and validates pushes; you (Claude Code) implement. A file being open in the editor is NOT an instruction.

  • TASK.md / TASK-*.md — a spec for you to implement. Then push and update hub/CHANGELOG.md and root REPORT.md per the convention below.
  • RUNBOOK-*.md — an operational procedure. CC executes the steps it has access and capability for, including live validation on the demo nodes and the demo Proxmox host (CC has root@felhom-pve SSH + the felhom-agent token). Mark a step HUMAN only when it genuinely needs physical presence, a real-world decision, or credentials CC truly lacks.
  • Validation of a push against a spec's criteria is project Claude's job, not yours, unless asked.
  • Browser automation is NOT available in the DooPlex environment (claude-in-chrome was a Windows-workstation capability). Validate at the endpoint level — invoke the exact endpoint the UI invokes — and via render tests; say which method was used. The hub UI is operator-password-gated anyway, so render tests were already the method for UI changes. Strict end-to-end UI coverage is a manual click-through by the operator.

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

  • CHANGELOG.md — cumulative log, newest on top (here: per-area hub/, scripts/, website/).
  • REPORT.mdoverwrite with the most recent implementation/validation summary only. Parallel sessions: REPORT.md is overwritten, so two sessions working in this repo at once will clobber each other. The second session writes REPORT-<topic>.md instead and never touches the shared REPORT.md.

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

  • Update REUSE.md if you added/changed/deprecated a shared helper or pattern (same commit).
  • Never git add -A in this repo — parallel sessions share the clone and it sweeps foreign WIP (the v0.47.0 146d165 incident: a red-proof-mutated guard got swept to main). Stage explicit paths only, git pull --rebase before every push, and do not run two writing sessions on one clone (use git worktree if truly needed).

Tech stack (Hub)

  • Language: Go (stdlib net/http + html/template, no frameworks). DB: SQLite via modernc.org/sqlite (pure Go). Auth: bcrypt + Bearer tokens + session cookies + CSRF.
  • Deploy: Docker on k3s (felhom-system ns). Storage: Longhorn PVC at /data/ (SQLite DB).
  • Config: YAML via ConfigMap at /etc/felhom-hub/hub.yaml. Secrets via out-of-band secretKeyRef (never inline stringData — REUSE.md §3).

Environment & access

Claude Code runs on DooPlex (192.168.0.180, Debian 13, user kisfenyo) — the k3s node itself. Repos in /mnt/5_hdd/felhom.eu/git/, build dirs in /mnt/5_hdd/felhom.eu/build/. kubectl and the image build/push 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 ssh felhom-pve (root@192.168.0.162) pveum/pct + live Proxmox validation

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 fails silently). Retained in case that environment is revived.

Build & deploy — Hub (GitOps via ArgoCD)

Full runbook: use the felhom-build-deploy skill. The load-bearing rules:

The whole cluster is GitOps via a single ArgoCD app felhom syncing this repo's manifests/ to felhom-system. Auto-sync is OFF — deploys are a deliberate manual sync. ArgoCD's source of truth is the manifest:

  • A code change + CHANGELOG bump deploys NOTHING. The running image changes only when manifests/hub.yaml's image: tag changes in git and the app is synced.
  • Pin explicit versions, never :latest. Never bare kubectl set image/kubectl apply (reverted on next sync).
  • The live image can lag the CHANGELOG when a bump was committed but the manifest/sync step never happened — reconcile via the manifest, not the changelog.
  • Green gate before any hub commit: go build ./... && go vet ./... && go test ./... in hub/.

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).

Steps: commit+push code → cd /mnt/5_hdd/felhom.eu/build/felhom-hub && ./build.sh <VER> --push (local) → bump manifests/hub.yaml tag + push → ArgoCD hard-refresh + sync (kubectl-patch method in the skill, now local sudo kubectl) → verify Synced/Healthy + rollout + image + startup log.

Build & deploy — Website / Manifests

  • Website auto-deploys via git-sync; just push to main (live in 12 min). Run python3 scripts/site_gates.py after ANY website change; new pages go into its PAGES list. Emergency edits: https://files.felhom.eu. All website/ HTML is UTF-8 with BOM — preserve it.
  • Manifests are GitOps via the felhom app — commit to main, then deliberate sync.

Key patterns

  • Hub status logic: OK (report < 30m), WARN (30m1h or health=warn), DOWN (> 1h or health=fail); host liveness thresholds shared between UI and checker (never invent a second definition).
  • SQLite timestamps vary in format — always parseSQLiteTime().
  • Dashboard/detail auto-refresh every 60s via meta refresh. Geo-restricted to Hungary via nginx ingress annotation.
  • Helpers, seams, extension points, traps: REUSE.md — the map is maintained same-commit.