infrastructure/AGENTS.md

# Ghostnet.AI project context

Before infrastructure work, read `.codex/LOCAL_MEMORY.md` if it exists. It contains dated local observations and access hints; verify live state before making system changes. Keep secrets and private key material out of that file.

For read-only access to the KI server, use the tested SSH profile `ghostnet-ai-agent`, which logs in as the unprivileged account `ghost-agent` on `10.0.0.90`. On this workstation, invoke it as `ssh -F ~/.ssh/config ghostnet-ai-agent` because the system-wide SSH client configuration currently has an ownership/permissions error. Do not assume sudo access or make server changes without an explicit user request.

The KI server at `10.0.0.90` is deliberately a fresh base system. The operator plans to install the LLM application stack in a later Ansible sprint. Do not install applications or change server configuration as part of documentation review or access checks unless the operator explicitly requests that work.

## Agent access convention: `ghost-agent`

`ghost-agent` is the standard unprivileged account for the AI agent on the
Proxmox LXCs and the KI server (operator-confirmed 2026-10-28: "on the KI
server and many other Proxmox LXCs"). It is a convention, not a per-host
exception.

- Login is key-based with a **passphrase-less** Ed25519 key kept in the
  operator's `~/.ssh` (`id_ed25519_ghostnet_<host>_agent`); `~/.ssh/config`
  carries the matching `ghostnet-<host>-agent` aliases, which also work with
  `ssh -o BatchMode=yes`. Private keys never enter the repository.
- `ghost-agent` has **no sudo** (verified on CT 100, CT 101, CT 103 and
  ghostnet-ki): treat every agent session as read-only unless the operator
  explicitly authorizes a change.
- Known aliases (verify live state before use; the WireGuard LXC has no
  `ghost-agent` alias and uses the legacy `admin` account via alias `lxc`):

  | Alias | System | IP |
  | --- | --- | --- |
  | `ghostnet-ct100-agent` | CT 100, Pi-hole/Split-DNS `dns` | 10.0.0.14 |
  | `ghostnet-ct101-agent` | CT 101, Samba file server | 10.0.0.9 |
  | `ghostnet-ct102-agent` | CT 102, Keycloak | 10.0.0.4 |
  | `ghostnet-ct103-agent` | CT 103, reverse proxy (NPM) | 10.0.0.10 |
  | `ghostnet-ct104-agent` | CT 104, Keycloak | 10.0.0.16 |
  | `ghostnet-ai-agent` | ghostnet-ki, LLM/AI server | 10.0.0.90 |

- Invoke ssh as `ssh -F ~/.ssh/config <alias>`: a bare `ssh` currently rejects
  `/etc/ssh/ssh_config.d/20-systemd-ssh-proxy.conf` because of its
  ownership/permissions; `-F` deliberately uses the local profile without
  loading that broken system configuration.
- Dated per-host observations (host-key fingerprints, verified identities,
  account details) live in `.codex/LOCAL_MEMORY.md`, not here.

## Account landscape and Ansible inventory paths

| Account | Role | Key (operator `~/.ssh`) | sudo |
| --- | --- | --- | --- |
| `ghost-agent` | AI agent, read-only | `id_ed25519_ghostnet_<host>_agent` (no passphrase) | no |
| `ghost` | human operator/admin | `id_ed25519_ghostnet_<host>_ghost` (passphrase-protected) | yes, password-gated |
| `ansible-deploy` | Ansible deployment; created by the project's access role during adoption | `id_ed25519_ghostnet_<host>_ansible_deploy` (no passphrase) | `NOPASSWD: ALL` (treat the key as root-equivalent) |

Each Ansible LXC project (`proxmox/lxc/<ct>/ansible/`) maps these accounts to
three inventories: `agent` (`ghost-agent`, read-only preflight), `bootstrap`
(`ghost`, `--ask-become-pass`), `production` (`ansible-deploy`, NOPASSWD).
Legacy exceptions exist (CT 103 is root-only and bootstrapped via the Proxmox
console; the WireGuard LXC uses `admin`) — see `.codex/LOCAL_MEMORY.md`.

## Operator-run steps

- The workstation has **no Proxmox host access** (no `pct`): PVE-side commands
  (`pct exec`, `pct reboot`, `vzdump`, editing `/etc/pve/lxc/*.conf`) are run by
  the operator as root@pve. The agent prepares exact commands and reviews the
  pasted output.
- Interactive secret steps are operator-run: `passwd`, `smbpasswd -a`, playbook
  runs with `--ask-become-pass`, and key passphrase prompts. The agent hands
  over copy-paste commands; the operator executes them.
- Secrets never enter the repository, inventories, playbooks or logs: SMB
  passwords, the Samba passdb, the `ghost` password, private SSH keys, Podman
  secrets. Only public keys belong in the repo (`ansible/files/ssh/`).

## LXC / Proxmox conventions

- Reboot caveat (GNAI-016 section 7): in LXC, `/proc/sys/kernel/random/boot_id`
  belongs to the PVE host and does **not** change on a guest reboot — never use
  boot_id-based waiters; reboot via PVE and verify independently over SSH.
- Unprivileged LXCs: keep the empty `lxc.seccomp.profile:` line (rootful
  Podman/Ganesha containers need `open_by_handle_at`), mask
  `sys-kernel-config.mount` (configfs is unavailable), and expect
  `uid_map 0 100000 65536` — host UIDs appear as 65534 (nobody) inside the
  guest.
- In-place dist-upgrades: take a `vzdump` safety net first and use
  `--force-confold` so productive configuration files survive.

## Repository conventions

- Documentation: `docs/platform/proxmox-server/lxc/<ct>/GNAI-*.md` (German;
  decisions carry operator/date stamps, findings are lettered a), b), …).
  Ansible project READMEs are English. The central index is
  `docs/GNAI-000-DOC_Index.md`.
- Ansible projects are self-contained under `proxmox/lxc/<ct>/ansible/`
  (`ansible.cfg`, `inventories/{agent,bootstrap,production}`, `playbooks/`,
  `roles/`, `files/ssh/`), use the repository-wide control venv (`.venv`, built
  from `shared/ansible/requirements-control.txt`) and the shared roles in
  `shared/ansible/roles/`.
- Change discipline: productive changes only with explicit operator go; preview
  with `--check --diff` first; convergence must be idempotent (a second run
  reports `changed=0`); commit only when the operator asks.
- Communicate with the operator in German.
- Verify account/identity assumptions with the operator before declaring them
  (CT 101 example: `dark2devil` turned out to be the same person as
  `debugofen`; GNAI-019 decision 11 was revised accordingly).