oikos/AGENTS.md

# AGENTS.md — orientation for any agent on a homelab client

You are running on a machine that is part of the **hubris** homelab. The full
context is in this checkout at `/opt/homelab-context/`. This file is the entry
point. Read it once at start, then keep working.

## 1. Who you are

Run `hostname` (Linux) or `scutil --get LocalHostName` (macOS), then read:

    /opt/homelab-context/hosts/<your-hostname>.yaml

That file tells you your role, your peers, what's mounted, and what services
you host. If it does not exist, this client was not enrolled — stop and tell
the operator to run `homelab client add <hostname>` from an existing client.

## 2. The topology

- `/opt/homelab-context/inventory.yaml` — every host, LXC, VM, and workstation
  with their mesh addresses, roles, and service mappings. Treat this file as
  authoritative; anything you read in narrative pages should agree with it.
- `/opt/homelab-context/infrastructure/mesh.md` — Netbird mesh state.
  Tailscale was decommissioned 2026-06-21; the fleet is Netbird-only.
- `/opt/homelab-context/infrastructure/dns.md` — split-horizon DNS via
  dnsmasq on LXC 124. `*.hubris.network` resolves to 192.168.x.x on the LAN
  and to mesh addresses off-LAN.
- `/opt/homelab-context/operations/commands.md` — the operator's cheatsheet
  for pct, caddy, dnsmasq. Use these verbs when you take actions.

## 3. The MCP server

The homelab exposes a Model Context Protocol server with structured tools.
Endpoint is in `inventory.yaml` under `services.homelab_mcp.endpoint`.

Available tools:

  Context (pure read):
    get_host(name), list_services(), find_service(name_or_role),
    get_topology(), search_docs(query), get_page(path),
    get_changelog(page, since?), whoami(hostname),
    list_my_secrets(caller_pubkey?)

  Management (read-only):
    get_service_status(service), tail_log(service, lines=200),
    list_lxcs(), get_lxc_state(lxc), ping_service(service)

Mutations are **not** exposed via MCP. Use the `homelab` CLI for those, with
operator confirmation.

**When to prefer MCP over grepping the clone:** any time you need to resolve a
name to an address, look up service status, or search the wiki by content.
Grep is fine for browsing or when MCP is unreachable.

## 4. Wiki conventions

- Pages live under `containers/`, `hosts/`, `vms/`, `infrastructure/`,
  `investigations/`, `operations/`. Cross-link liberally; orphans are bugs.
- Every page ends with a `## Changelog` section, entries in reverse-chrono
  order:

      ### YYYY-MM-DD — short title
      one or two lines describing what changed and why.

- Investigation files are dated and slugged: `YYYY-MM-DD-slug.md`.
- Live state takes precedence over docs. If you observe a discrepancy, update
  the docs *in the same session* (per the same-session update rule).

## 5. Acting on the homelab

- **Read state**: prefer MCP tools, then files, then shell. Examples:
  `homelab whoami`, `homelab list`, `homelab status`, `homelab logs caddy`.
- **Cross-host actions** (caddy reload, pct exec, etc.): use the `homelab`
  CLI — it resolves hostname → mesh address → ssh / pct path for you. Direct
  SSH still works; the CLI just removes the lookup burden.
- **Secrets**: never hardcode. Call `homelab secret <name>` to decrypt on
  demand using the per-client age key at `/etc/age/key.txt`. Secrets ARE
  available in this system — `list_my_secrets()` (MCP) shows what you can
  decrypt.
- **Mutations** (restart, edit configs, etc.): the `homelab` CLI's mutating
  subcommands ask for confirmation. For ad-hoc work, SSH and edit directly —
  but commit changes that touch tracked configs (caddy, gitea custom,
  artifacto, mule-image, etc.; see `infrastructure/auto-deploy.md`).
- **Wiki updates**: same-session rule applies to any meaningful state change
  this client makes.

## 6. Auto-setup mechanism

The homelab-context repo ships tooling that gets automatically installed
on every client after `git pull`. This is handled by `tools/post-pull.sh`
(replaces the raw git pull in the sync timer) which runs any script matching
`tools/*.setup.sh` after pull.

Currently auto-setup:
- **Caveman + templates** (`tools/setup-caveman.sh`): Installs Caveman npm
  package, wrapper scripts, and compact output templates for token-efficient
  CLI output. Wrapper at `~/bin/caveman_wrapper.sh`.
- **Hermes agent persona** (`tools/setup-hermes-soul.sh`): Provisions
  `~/.hermes/SOUL.md` from `HERMES.md` on Hermes agents. This ensures every
  Hermes agent follows the canonical homelab persona (token efficiency, source
  of truth hierarchy). No-op on non-Hermes agents.

To add a new auto-setup, create `tools/<name>.setup.sh` in the repo,
commit and push. All enrolled clients pick it up within 5 minutes.

To trigger sync manually: `sudo homelab sync` or wait for the 5-min timer.

## 7. When in doubt

Run `homelab mcp search_docs <query>` or `homelab mcp get_host <name>`.
The clone is the fallback; MCP is the index.