From b230ab593764910b054824f21b7662665cea68f9 Mon Sep 17 00:00:00 2001
From: dtoro <d.toro.v@pm.me>
Date: Sun, 5 Jul 2026 22:50:34 +0200
Subject: [PATCH] Oikos Week 1: kernel policy, ontology, service contract,
 topology gen

Adds the Oikos agent-OS kernel: oikos/policy.yaml (risk classes +
approval rules for every homelab/MCP command), oikos/ontology.yaml
(8-domain systems model, typed relationships, node lifecycle), and
OIKOS.md (OODA loop operating brief, linked from AGENTS.md).

Extends inventory.yaml with a stable service contract (doc_page,
config_repo, risk_notes) on all 17 services, and a structured
archaeology: section for the 13 destroyed LXCs (was scattered
comments + a narrative table). Fixes stale drift found in the
process: authentik's backend pointed at a retired LXC (124); core
has run on the VPS since 2026-05-31.

Adds oikos/gen-topology.py, generating infrastructure/topology.md
(Mermaid compute/ingress + storage views) from inventory.yaml.
build_host_files.py now carries state/storage/depends_on into
generated hosts/*.yaml.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 AGENTS.md                  |   5 ++
 OIKOS.md                   | 107 ++++++++++++++++++++++
 hosts/apps.yaml            |   9 ++
 hosts/arriman.yaml         |   2 +
 hosts/auth-outpost.yaml    |   1 +
 hosts/caddy.yaml           |   5 ++
 hosts/dns.yaml             |   9 +-
 hosts/elementsynapse.yaml  |   3 +
 hosts/gitea.yaml           |   4 +
 hosts/grimmory.yaml        |   1 +
 hosts/haos.yaml            |   2 +
 hosts/house.yaml           |   1 +
 hosts/hubris.yaml          |   3 +
 hosts/jellyfin.yaml        |   4 +
 hosts/mac-mini.yaml        |   1 +
 hosts/mule-images.yaml     |   3 +
 hosts/netbird-vps.yaml     |  11 +++
 hosts/nextcloud.yaml       |   2 +
 hosts/nfs-export.yaml      |   1 +
 hosts/paperless.yaml       |   3 +
 hosts/rclone.yaml          |   1 +
 hosts/republic-laptop.yaml |   1 +
 hosts/romm.yaml            |   1 +
 hosts/seanime.yaml         |   1 +
 hosts/sophia.yaml          |   1 +
 hosts/strong.yaml          |   1 +
 hosts/trmnl.yaml           |   3 +
 hosts/zimaos.yaml          |   2 +
 infrastructure/topology.md |  93 +++++++++++++++++++
 inventory.yaml             | 123 ++++++++++++++++++++++++-
 mcp/build_host_files.py    |   4 +
 oikos/gen-topology.py      | 178 +++++++++++++++++++++++++++++++++++++
 oikos/ontology.yaml        | 137 ++++++++++++++++++++++++++++
 oikos/policy.yaml          | 117 ++++++++++++++++++++++++
 34 files changed, 832 insertions(+), 8 deletions(-)
 create mode 100644 OIKOS.md
 create mode 100644 infrastructure/topology.md
 create mode 100644 oikos/gen-topology.py
 create mode 100644 oikos/ontology.yaml
 create mode 100644 oikos/policy.yaml

diff --git a/AGENTS.md b/AGENTS.md
index 997428e..eaf8c19 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -4,6 +4,11 @@ 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.
 
+The operating model — OODA loop, risk classes, approval rules, the ontology,
+and node lifecycle — is defined in [OIKOS.md](OIKOS.md). Before any mutation,
+classify the action against `oikos/policy.yaml`; when the class requires
+approval, stop and ask the operator.
+
 ## 1. Who you are
 
 Run `hostname` (Linux) or `scutil --get LocalHostName` (macOS), then read:
diff --git a/OIKOS.md b/OIKOS.md
new file mode 100644
index 0000000..cc15bf7
--- /dev/null
+++ b/OIKOS.md
@@ -0,0 +1,107 @@
+# Oikos — the operating model
+
+Oikos (Greek: *household*) is the agent operating system layered on this
+repo. It is not new infrastructure: `inventory.yaml` is the kernel data
+structure, the `homelab` CLI and MCP server are the syscall surface, and
+this page defines the rules everything above them follows.
+
+Read this after [AGENTS.md](AGENTS.md). Machine-readable companions:
+[oikos/ontology.yaml](oikos/ontology.yaml) (systems model),
+[oikos/policy.yaml](oikos/policy.yaml) (risk & approval).
+
+## The kernel loop: OODA
+
+Every Oikos activity — scheduled probe, agent task, operator request — is
+one pass through **Observe → Orient → Decide → Act**:
+
+1. **Observe** — probes, drift detectors, and agent findings produce
+   **Signals** (structured records, not loose messages): pending updates,
+   high temperature, low disk, service down, cert expiry, stale backup,
+   inventory drift.
+2. **Orient** — walk the ontology graph: what entity is affected, what
+   depends on it (blast radius), its lifecycle state, whether a runbook
+   matches, what the ledger says about past attempts.
+3. **Decide** — the classifier scores **risk class × blast radius ×
+   confidence** and routes:
+   - **auto-act**: within autonomy policy, high confidence, contained radius
+   - **escalate**: operator approval via Matrix (✅/❌ reaction; destructive
+     actions additionally need a typed confirmation phrase)
+   - **queue**: informational — console + reports
+   The classifier can only *lower* autonomy relative to policy, never raise
+   it. When in doubt, escalate.
+4. **Act** — execute through `homelab` commands or runbooks (never ad-hoc
+   SSH), then **verify** with the action's verification command, write a
+   **ledger** entry, resolve the Signal, and update docs in the same session.
+
+## Primitives
+
+| Primitive | What it is | Lives in |
+|---|---|---|
+| Host / Service | topology entities | `inventory.yaml` (+ generated `hosts/*.yaml`) |
+| Secret | SOPS+age encrypted value, per-client recipients | `secrets/` + `.sops.yaml` |
+| Runbook | executable workflow with risk class + verification | `runbooks/` (Week 2) |
+| Signal | something needing attention, with lifecycle | `signals/` ledger (Week 3) |
+| Change | one mutation: who, what, risk, approval, verification | `ledger/` (Week 2) |
+| Approval | short-TTL signed grant for a gated action | approval engine (Week 3) |
+| Incident | investigation narrative | `investigations/` |
+| Plan | design doc for non-trivial work | `plans/` |
+| Agent | enrolled client identity = its age pubkey | `inventory.yaml` + `.sops.yaml` |
+
+## Risk classes (enforced, not advisory)
+
+From [oikos/policy.yaml](oikos/policy.yaml):
+
+- **read_only** — status, logs, docs, inventory. Unattended.
+- **reversible_low** — restart, cache clear, sync pull. Unattended + ledger.
+- **config_mutation** — tracked-config edits (commit+push, never local),
+  deploys, upgrades, DNS/ingress changes. Operator approval.
+- **destructive** — destroy, format, wipe, rotate, revoke. Approval +
+  typed confirmation phrase.
+
+Lifecycle gates modify these: `provisioning` nodes are freely mutable
+(nothing depends on them); `deprecated` nodes accept no new dependents;
+anything touching a `destroyed` node is drift.
+
+## The systems model
+
+Eight domains — physical, compute, network, storage, software,
+identity & access, operations, external — cover everything in the lab;
+entities are connected by typed edges (`hosts`, `provides`, `mounts`,
+`stores-on`, `routes-to`, `can-decrypt`, `depends-on`, `backs-up-to`, …)
+defined in [oikos/ontology.yaml](oikos/ontology.yaml). Rule of
+completeness: **if it can break, be changed, or hold data, it has an
+entity and edges.** Blast-radius questions ("what breaks if strong goes
+down?") are graph walks, not doc archaeology.
+
+Nodes move through an explicit lifecycle —
+`planned → provisioning → active → migrating → deprecated → destroyed` —
+stored as `state:` in inventory (absent = active). Destroyed nodes live in
+the `archaeology:` section. Each transition is a runbook checklist;
+deprecation completes only when inbound edges reach zero.
+
+Generated views: [infrastructure/topology.md](infrastructure/topology.md)
+(Mermaid, regenerated from inventory).
+
+## Conventions carried forward
+
+- Inventory is the truth; live state wins over narrative docs.
+- Prefer `homelab` CLI and MCP over ad-hoc SSH.
+- Meaningful changes update docs in the same session.
+- Secrets are decrypted locally via per-client keys; never into docs/comments.
+- Tracked configs change by commit + push, not local edits.
+- Netbird is the preferred mesh path for new traffic.
+- Agents are terse ([CAVEMAN.md](CAVEMAN.md)), verify claims, and fix
+  collateral drift when found.
+
+## Build status (30-day roadmap, started 2026-07-05)
+
+- **Week 1 (this)**: policy, ontology, service contract, archaeology,
+  topology generator, this brief.
+- **Week 2**: context cards, `homelab service <name> …`, change ledger,
+  `node relations`, runbooks.
+- **Week 3**: Prometheus + node_exporter, ops scheduler + state cache,
+  drift detectors, signal engine, decision classifier, approval engine
+  (Matrix ✅/❌), daily brief.
+- **Week 4**: Oikos Console (oikos.hubris.network, behind Authentik with
+  step-up re-auth on approvals), per-agent age-key-signed approval
+  requests, docs pass, 60/90-day backlog.
diff --git a/hosts/apps.yaml b/hosts/apps.yaml
index 7e3ee4c..ad5a2cb 100644
--- a/hosts/apps.yaml
+++ b/hosts/apps.yaml
@@ -5,6 +5,7 @@ name: apps
 kind: lxc
 os: linux
 role: docker-apps
+state: active
 host: hubris
 pve_id: 105
 lan_ip: 192.168.8.205
@@ -33,21 +34,29 @@ services_hosted:
 - name: artifacto
   backend: apps
   url: https://artifacto.hubris.network
+  doc_page: containers/105-apps.md
+  config_repo: dtoro/Artifacto
 - name: homelab_mcp
   backend: apps
   port: 9810
   systemd_unit: homelab-mcp
   public_host: mcp.hubris.network
   endpoint: https://mcp.hubris.network/mcp
+  doc_page: infrastructure/homelab-context.md
+  config_repo: dtoro/Homelab-Docs
   note: MCP server. Read-only context + management. Reachable on the LAN via Caddy and from off-LAN via
     Netbird (192.168.8.0/24 is a network resource routed through hubris).
+  risk_notes: "agents' primary read surface \u2014 outage degrades every agent to grepping the clone"
 - name: secrets_issuance
   backend: apps
   port: 9820
   systemd_unit: secrets-issuance
   public_host: secrets.hubris.network
   endpoint: https://secrets.hubris.network/issue
+  doc_page: operations/agent-enrollment.md
+  config_repo: dtoro/Homelab-Docs
   note: Issues per-client age private keys. Gated at source-IP layer (mesh + LAN subnets in MESH_SUBNETS).
+  risk_notes: "identity issuance \u2014 any change is security-sensitive; key operations are destructive-class"
 age_pubkey: age1duyl8mkpgu80uv934dy8q7enqjms6yvdz264hme8uryuxmvvqesq6rusq0
 see_also:
 - containers/105-apps.md
diff --git a/hosts/arriman.yaml b/hosts/arriman.yaml
index dc3674c..27c0933 100644
--- a/hosts/arriman.yaml
+++ b/hosts/arriman.yaml
@@ -5,6 +5,7 @@ name: arriman
 kind: lxc
 os: linux
 role: arr-stack
+state: active
 host: strong
 pve_id: 122
 lan_ip: 192.168.8.245
@@ -28,6 +29,7 @@ services_hosted:
 - name: arr_stack
   backend: arriman
   note: jellyseerr / qbit / sab on docker compose
+  doc_page: containers/122-arriman.md
 notes:
 - Migrated from hubris to strong 2026-07-05 (Phase 2). Library on ludo-lvm.
 - Contains homarr, radarr, sonarr, lidarr, sabnzbd, qbittorrent, bazarr, flaresolverr, prowlarr, jellyseerr
diff --git a/hosts/auth-outpost.yaml b/hosts/auth-outpost.yaml
index 93112bf..e849205 100644
--- a/hosts/auth-outpost.yaml
+++ b/hosts/auth-outpost.yaml
@@ -5,6 +5,7 @@ name: auth-outpost
 kind: lxc
 os: linux
 role: authentik-gateway
+state: active
 host: hubris
 pve_id: 106
 lan_ip: 192.168.8.6
diff --git a/hosts/caddy.yaml b/hosts/caddy.yaml
index cc0adcc..02c0b8a 100644
--- a/hosts/caddy.yaml
+++ b/hosts/caddy.yaml
@@ -5,6 +5,7 @@ name: caddy
 kind: lxc
 os: linux
 role: reverse-proxy
+state: active
 host: hubris
 pve_id: 121
 lan_ip: 192.168.8.175
@@ -23,6 +24,10 @@ services_hosted:
   backend: caddy
   role: reverse-proxy
   note: terminates all *.hubris.network
+  doc_page: containers/121-caddy.md
+  config_repo: dtoro/caddy-conf
+  risk_notes: "wide blast radius \u2014 every *.hubris.network route rides on it (see oikos/policy.yaml\
+    \ service_overrides)"
 notes:
 - Terminates all *.hubris.network
 - /etc/caddy is a git checkout of dtoro/caddy-conf
diff --git a/hosts/dns.yaml b/hosts/dns.yaml
index 8e01807..8a966d2 100644
--- a/hosts/dns.yaml
+++ b/hosts/dns.yaml
@@ -5,6 +5,7 @@ name: dns
 kind: lxc
 os: linux
 role: dns-server
+state: active
 host: hubris
 pve_id: 107
 lan_ip: 192.168.8.2
@@ -14,13 +15,13 @@ mesh_globals:
   - netbird
   - tailscale
 runs:
-- authentik
+- dns
 services_hosted:
-- name: authentik
-  url: https://auth.hubris.network
+- name: dns
   backend: dns
-  dns: null
   note: Technitium DNS, split-horizon zone
+  doc_page: containers/107-dns.md
+  risk_notes: "LAN-wide resolver \u2014 misconfig breaks name resolution for every client"
 notes:
 - Technitium DNS, split-horizon zone for *.hubris.network
 - Primary DNS for 192.168.8.0/24 LAN (inventory.services.dns references this)
diff --git a/hosts/elementsynapse.yaml b/hosts/elementsynapse.yaml
index a7c64ed..2f2dbad 100644
--- a/hosts/elementsynapse.yaml
+++ b/hosts/elementsynapse.yaml
@@ -5,6 +5,7 @@ name: elementsynapse
 kind: lxc
 os: linux
 role: matrix-server
+state: active
 host: strong
 pve_id: 118
 lan_ip: 192.168.8.242
@@ -22,6 +23,8 @@ services_hosted:
 - name: matrix
   url: https://matrix.hubris.network
   backend: elementsynapse
+  doc_page: containers/118-elementsynapse.md
+  risk_notes: "alert/approval channel for Oikos \u2014 outage silences agent escalation"
 notes:
 - Migrated from hubris to strong 2026-07-05 (Phase 1 of strong migration plan).
 see_also:
diff --git a/hosts/gitea.yaml b/hosts/gitea.yaml
index 87f25a2..01e8963 100644
--- a/hosts/gitea.yaml
+++ b/hosts/gitea.yaml
@@ -5,6 +5,7 @@ name: gitea
 kind: lxc
 os: linux
 role: git-server
+state: active
 host: hubris
 pve_id: 104
 lan_ip: 192.168.8.121
@@ -26,6 +27,9 @@ services_hosted:
   url: https://git.hubris.network
   backend: gitea
   backend_url: http://192.168.8.121:3000
+  doc_page: containers/104-gitea.md
+  config_repo: dtoro/gitea-customizations
+  risk_notes: hosts all config repos + deploy webhooks; outage blocks auto-deploy and sync
 notes:
 - Bare repos live at /mnt/library/repos/dtoro/*.git
 see_also:
diff --git a/hosts/grimmory.yaml b/hosts/grimmory.yaml
index 364f457..d04d322 100644
--- a/hosts/grimmory.yaml
+++ b/hosts/grimmory.yaml
@@ -5,6 +5,7 @@ name: grimmory
 kind: lxc
 os: linux
 role: book-library
+state: active
 host: strong
 pve_id: 130
 lan_ip: 192.168.8.247
diff --git a/hosts/haos.yaml b/hosts/haos.yaml
index 40e3e9c..909198b 100644
--- a/hosts/haos.yaml
+++ b/hosts/haos.yaml
@@ -5,6 +5,7 @@ name: haos
 kind: vm
 os: linux
 role: home-automation
+state: active
 host: hubris
 pve_id: 108
 lan_ip: 192.168.8.101
@@ -21,6 +22,7 @@ runs:
 services_hosted:
 - name: haos
   backend: haos
+  doc_page: vms/108-haos.md
 see_also:
 - vms/108-haos.md
 mcp_endpoint: https://mcp.hubris.network/mcp
diff --git a/hosts/house.yaml b/hosts/house.yaml
index 5ddef7e..17dc457 100644
--- a/hosts/house.yaml
+++ b/hosts/house.yaml
@@ -5,6 +5,7 @@ name: house
 kind: lxc
 os: linux
 role: family-planner
+state: active
 host: strong
 pve_id: 129
 lan_ip: 192.168.8.244
diff --git a/hosts/hubris.yaml b/hosts/hubris.yaml
index bb156ce..0f3d065 100644
--- a/hosts/hubris.yaml
+++ b/hosts/hubris.yaml
@@ -5,6 +5,7 @@ name: hubris
 kind: proxmox-host
 os: linux
 role: hypervisor
+state: active
 lan_ip: 192.168.8.77
 mesh:
   netbird:
@@ -28,6 +29,8 @@ services_hosted:
   url: https://proxmox.hubris.network
   backend: hubris
   port: 8006
+  doc_page: hosts/hubris.md
+  risk_notes: "hypervisor UI \u2014 changes here affect every guest on the node"
 age_pubkey: age1xkklkvnk5z0fsnh6cfgv70hy9ksfy8rdprwerzw4yk3p4p7cxcqs2yvpz6
 see_also:
 - hosts/hubris.md
diff --git a/hosts/jellyfin.yaml b/hosts/jellyfin.yaml
index e80ce92..982a6df 100644
--- a/hosts/jellyfin.yaml
+++ b/hosts/jellyfin.yaml
@@ -5,6 +5,7 @@ name: jellyfin
 kind: lxc
 os: linux
 role: media-server
+state: active
 host: strong
 pve_id: 101
 lan_ip: 192.168.8.246
@@ -25,6 +26,9 @@ services_hosted:
 - name: jellyfin
   url: https://media.hubris.network
   backend: jellyfin
+  doc_page: containers/101-jellyfin.md
+  risk_notes: native Authentik OIDC via SSO-Auth plugin, no Caddy forward-auth gate; VAAPI transcode depends
+    on GPU passthrough on strong
 notes:
 - Jellyfin 10.11.11 with VAAPI hardware acceleration (Radeon 680M iGPU on strong)
 - 4 cores / 8 GiB RAM / 1 GiB swap
diff --git a/hosts/mac-mini.yaml b/hosts/mac-mini.yaml
index 036c49e..2784a70 100644
--- a/hosts/mac-mini.yaml
+++ b/hosts/mac-mini.yaml
@@ -5,6 +5,7 @@ name: mac-mini
 kind: workstation
 os: macos
 role: dev
+state: active
 lan_ip: 192.168.178.182
 mesh:
   netbird:
diff --git a/hosts/mule-images.yaml b/hosts/mule-images.yaml
index 75b8633..26d4c12 100644
--- a/hosts/mule-images.yaml
+++ b/hosts/mule-images.yaml
@@ -5,6 +5,7 @@ name: mule-images
 kind: lxc
 os: linux
 role: photo-management
+state: active
 host: hubris
 pve_id: 120
 lan_ip: 192.168.8.136
@@ -25,6 +26,8 @@ services_hosted:
 - name: photos
   url: https://photos.hubris.network
   backend: mule-images
+  doc_page: containers/120-mule-images.md
+  config_repo: dtoro/mule-image
 see_also:
 - containers/120-mule-images.md
 mcp_endpoint: https://mcp.hubris.network/mcp
diff --git a/hosts/netbird-vps.yaml b/hosts/netbird-vps.yaml
index 713a0bb..c3be6b5 100644
--- a/hosts/netbird-vps.yaml
+++ b/hosts/netbird-vps.yaml
@@ -5,6 +5,7 @@ name: netbird-vps
 kind: external
 os: linux
 role: netbird-mgmt
+state: active
 mesh:
   netbird:
     ip: 100.122.165.149
@@ -16,6 +17,16 @@ mesh_globals:
   - tailscale
 ssh:
   user: root
+runs:
+- authentik
+services_hosted:
+- name: authentik
+  url: https://auth.hubris.network
+  backend: netbird-vps
+  doc_page: containers/106-auth-outpost.md
+  note: core runs on the VPS since 2026-05-31; LAN forward-auth outpost is auth-outpost (LXC 106) at 192.168.8.6:9000.
+    Previous backend value "authentik" referenced the retired embedded-outpost host (LXC 124).
+  risk_notes: "SSO provider \u2014 outage locks login to OIDC/forward-auth services"
 notes:
 - "Public IONOS VPS \u2014 hosts the vanilla netbird mgmt+signal+relay+dashboard stack + host coturn (see\
   \ infrastructure/vps-hardening.md + infrastructure/mesh.md changelog 2026-05-21)."
diff --git a/hosts/nextcloud.yaml b/hosts/nextcloud.yaml
index a0f5a39..f2611cc 100644
--- a/hosts/nextcloud.yaml
+++ b/hosts/nextcloud.yaml
@@ -5,6 +5,7 @@ name: nextcloud
 kind: lxc
 os: linux
 role: file-sync
+state: active
 host: hubris
 pve_id: 114
 lan_ip: 192.168.8.224
@@ -25,6 +26,7 @@ services_hosted:
 - name: nextcloud
   url: https://cloud.hubris.network
   backend: nextcloud
+  doc_page: containers/114-nextcloud.md
 see_also:
 - containers/114-nextcloud.md
 mcp_endpoint: https://mcp.hubris.network/mcp
diff --git a/hosts/nfs-export.yaml b/hosts/nfs-export.yaml
index a38c1b4..ab2e332 100644
--- a/hosts/nfs-export.yaml
+++ b/hosts/nfs-export.yaml
@@ -5,6 +5,7 @@ name: nfs-export
 kind: lxc
 os: linux
 role: storage-export
+state: active
 host: hubris
 pve_id: 102
 lan_ip: 192.168.8.200
diff --git a/hosts/paperless.yaml b/hosts/paperless.yaml
index 71b5372..17bb657 100644
--- a/hosts/paperless.yaml
+++ b/hosts/paperless.yaml
@@ -5,6 +5,7 @@ name: paperless
 kind: lxc
 os: linux
 role: document-archive
+state: active
 host: hubris
 pve_id: 103
 lan_ip: 192.168.8.130
@@ -25,6 +26,8 @@ services_hosted:
 - name: paperless
   url: https://paperless.hubris.network
   backend: paperless
+  doc_page: containers/103-paperless.md
+  risk_notes: "document archive \u2014 treat data as irreplaceable; DB operations are destructive-class"
 see_also:
 - containers/103-paperless.md
 mcp_endpoint: https://mcp.hubris.network/mcp
diff --git a/hosts/rclone.yaml b/hosts/rclone.yaml
index 45d1341..899f78e 100644
--- a/hosts/rclone.yaml
+++ b/hosts/rclone.yaml
@@ -5,6 +5,7 @@ name: rclone
 kind: lxc
 os: linux
 role: backup
+state: active
 mesh:
   netbird:
     fqdn: rclone.netbird.selfhosted
diff --git a/hosts/republic-laptop.yaml b/hosts/republic-laptop.yaml
index 23fad6a..c3a280a 100644
--- a/hosts/republic-laptop.yaml
+++ b/hosts/republic-laptop.yaml
@@ -5,6 +5,7 @@ name: republic-laptop
 kind: workstation
 os: linux
 role: primary-dev
+state: active
 mesh:
   netbird:
     fqdn: republic-laptop.netbird.selfhosted
diff --git a/hosts/romm.yaml b/hosts/romm.yaml
index 2589b43..03b9a91 100644
--- a/hosts/romm.yaml
+++ b/hosts/romm.yaml
@@ -5,6 +5,7 @@ name: romm
 kind: lxc
 os: linux
 role: rom-manager
+state: active
 host: strong
 pve_id: 134
 lan_ip: 192.168.8.249
diff --git a/hosts/seanime.yaml b/hosts/seanime.yaml
index 42ab3b7..1857d2a 100644
--- a/hosts/seanime.yaml
+++ b/hosts/seanime.yaml
@@ -5,6 +5,7 @@ name: seanime
 kind: lxc
 os: linux
 role: anime-media-server
+state: active
 host: strong
 pve_id: 133
 lan_ip: 192.168.8.248
diff --git a/hosts/sophia.yaml b/hosts/sophia.yaml
index 222e00f..c564bb6 100644
--- a/hosts/sophia.yaml
+++ b/hosts/sophia.yaml
@@ -5,6 +5,7 @@ name: sophia
 kind: lxc
 os: linux
 role: workshop
+state: active
 host: hubris
 pve_id: 119
 lan_ip: 192.168.8.109
diff --git a/hosts/strong.yaml b/hosts/strong.yaml
index c926116..463a0f4 100644
--- a/hosts/strong.yaml
+++ b/hosts/strong.yaml
@@ -5,6 +5,7 @@ name: strong
 kind: proxmox-host
 os: linux
 role: hypervisor
+state: active
 lan_ip: 192.168.178.181
 mesh_globals:
   primary: netbird
diff --git a/hosts/trmnl.yaml b/hosts/trmnl.yaml
index 13d8db3..2e80ecc 100644
--- a/hosts/trmnl.yaml
+++ b/hosts/trmnl.yaml
@@ -5,6 +5,7 @@ name: trmnl
 kind: lxc
 os: linux
 role: trmnl-middleware
+state: active
 host: hubris
 pve_id: 128
 lan_ip: 192.168.8.211
@@ -21,6 +22,8 @@ services_hosted:
   backend: trmnl
   url: https://trmnl.hubris.network
   note: self-hosted middleware for TRMNL e-ink plugins (polled by TRMNL cloud)
+  doc_page: containers/128-trmnl.md
+  config_repo: dtoro/terminalito
 see_also:
 - containers/128-trmnl.md
 mcp_endpoint: https://mcp.hubris.network/mcp
diff --git a/hosts/zimaos.yaml b/hosts/zimaos.yaml
index 8b2a553..3fd4ac6 100644
--- a/hosts/zimaos.yaml
+++ b/hosts/zimaos.yaml
@@ -5,6 +5,7 @@ name: zimaos
 kind: vm
 os: linux
 role: nas-frontend-eval
+state: active
 host: hubris
 pve_id: 100
 lan_ip: 192.168.8.195
@@ -20,6 +21,7 @@ services_hosted:
 - name: zimaos
   url: https://zimaos.hubris.network
   backend: zimaos
+  doc_page: vms/100-zimaos.md
 see_also:
 - vms/100-zimaos.md
 mcp_endpoint: https://mcp.hubris.network/mcp
diff --git a/infrastructure/topology.md b/infrastructure/topology.md
new file mode 100644
index 0000000..ae7a31a
--- /dev/null
+++ b/infrastructure/topology.md
@@ -0,0 +1,93 @@
+<!-- Generated by oikos/gen-topology.py from inventory.yaml. -->
+<!-- Do NOT edit by hand - your changes will be overwritten. -->
+
+# Topology (generated)
+
+Source: [inventory.yaml](../inventory.yaml) — 2 hypervisors, 19 LXCs, 2 VMs, 2 workstations, 17 services.
+Edge semantics: [oikos/ontology.yaml](../oikos/ontology.yaml). Operating model: [OIKOS.md](../OIKOS.md).
+
+## Compute & ingress
+
+```mermaid
+flowchart LR
+    subgraph hubris_sub["hubris (Proxmox)"]
+        trmnl["trmnl<br/>LXC 128<br/>trmnl-middleware<br/>192.168.8.211"]
+        nfs_export["nfs-export<br/>LXC 102<br/>storage-export<br/>192.168.8.200"]
+        paperless["paperless<br/>LXC 103<br/>document-archive<br/>192.168.8.130"]
+        gitea["gitea<br/>LXC 104<br/>git-server<br/>192.168.8.121"]
+        apps["apps<br/>LXC 105<br/>docker-apps<br/>192.168.8.205"]
+        auth_outpost["auth-outpost<br/>LXC 106<br/>authentik-gateway<br/>192.168.8.6"]
+        dns["dns<br/>LXC 107<br/>dns-server<br/>192.168.8.2"]
+        nextcloud["nextcloud<br/>LXC 114<br/>file-sync<br/>192.168.8.224"]
+        sophia["sophia<br/>LXC 119<br/>workshop<br/>192.168.8.109"]
+        mule_images["mule-images<br/>LXC 120<br/>photo-management<br/>192.168.8.136"]
+        caddy["caddy<br/>LXC 121<br/>reverse-proxy<br/>192.168.8.175"]
+        zimaos["zimaos<br/>VM 100<br/>nas-frontend-eval<br/>192.168.8.195"]
+        haos["haos<br/>VM 108<br/>home-automation<br/>192.168.8.101"]
+    end
+    subgraph strong_sub["strong (Proxmox)"]
+        house["house<br/>LXC 129<br/>family-planner<br/>192.168.8.244"]
+        jellyfin["jellyfin<br/>LXC 101<br/>media-server<br/>192.168.8.246"]
+        elementsynapse["elementsynapse<br/>LXC 118<br/>matrix-server<br/>192.168.8.242"]
+        arriman["arriman<br/>LXC 122<br/>arr-stack<br/>192.168.8.245"]
+        grimmory["grimmory<br/>LXC 130<br/>book-library<br/>192.168.8.247"]
+        seanime["seanime<br/>LXC 133<br/>anime-media-server<br/>192.168.8.248"]
+        romm["romm<br/>LXC 134<br/>rom-manager<br/>192.168.8.249"]
+    end
+    rclone["rclone<br/>lxc<br/>backup"]
+    republic_laptop([republic-laptop<br/>workstation<br/>primary-dev])
+    mac_mini([mac-mini<br/>workstation<br/>dev<br/>192.168.178.182])
+    netbird_vps[[netbird-vps<br/>external<br/>netbird-mgmt]]
+    url_artifacto(["artifacto.hubris.network"]) -->|routes-to| apps
+    url_authentik(["auth.hubris.network"]) -->|routes-to| netbird_vps
+    url_gitea(["git.hubris.network"]) -->|routes-to| gitea
+    url_homelab_mcp(["mcp.hubris.network"]) -->|routes-to| apps
+    url_jellyfin(["media.hubris.network"]) -->|routes-to| jellyfin
+    url_matrix(["matrix.hubris.network"]) -->|routes-to| elementsynapse
+    url_nextcloud(["cloud.hubris.network"]) -->|routes-to| nextcloud
+    url_paperless(["paperless.hubris.network"]) -->|routes-to| paperless
+    url_photos(["photos.hubris.network"]) -->|routes-to| mule_images
+    url_proxmox_ui(["proxmox.hubris.network"]) -->|routes-to| hubris_sub
+    url_secrets_issuance(["secrets.hubris.network"]) -->|routes-to| apps
+    url_trmnl(["trmnl.hubris.network"]) -->|routes-to| trmnl
+    url_zimaos(["zimaos.hubris.network"]) -->|routes-to| zimaos
+```
+
+## Storage (mounts)
+
+```mermaid
+flowchart LR
+    mnt_library[("/mnt/library")]
+    mnt_media_local[("/mnt/media_local")]
+    mnt_media_local_anime[("/mnt/media_local/anime")]
+    apps["apps"] -->|mounts| mnt_library
+    arriman["arriman"] -->|mounts| mnt_media_local
+    gitea["gitea"] -->|mounts| mnt_library
+    grimmory["grimmory"] -->|mounts| mnt_media_local
+    hubris["hubris"] -->|mounts| mnt_library
+    jellyfin["jellyfin"] -->|mounts| mnt_media_local
+    mule_images["mule-images"] -->|mounts| mnt_library
+    nextcloud["nextcloud"] -->|mounts| mnt_library
+    paperless["paperless"] -->|mounts| mnt_library
+    romm["romm"] -->|mounts| mnt_media_local
+    seanime["seanime"] -->|mounts| mnt_media_local_anime
+    sophia["sophia"] -->|mounts| mnt_library
+```
+
+## Archaeology (destroyed nodes)
+
+| Node | ID | Destroyed | Reason |
+|---|---|---|---|
+| plato | 126 | 2026-06-28 | notes workspace decommissioned; data retained at /mnt/library/documents/plato |
+| claudio-bot | 123 | 2026-06-04 | replaced by Hermes Agent on mac-mini; monitoring moved to homelab-health-watchdog cron |
+| mule-photos-new | 127 | 2026-05-22 | PhotoPrism test stack promoted to LXC 120 (Mulimage 2.0 merge) |
+| heaper | 116 | 2026-05-14 | decommissioned; data retained at /mnt/library/heaper |
+| syncthing | 109 | 2026-05-14 | decommissioned; library subtree was empty |
+| seafile | 125 | 2026-05-13 | Seafile Pro evaluation rejected; files.hubris.network removed from caddy + dns |
+| arr-yunohost | 100 | 2026-04-28 | migrated to docker stack on arriman (LXC 122) |
+| flaresolverr | 106 | 2026-04-28 | folded into the arriman docker compose |
+| marimo | 107 | 2026-04-28 | decommissioned |
+| photoprism | 110 | 2026-04-28 | replaced by mule-images (LXC 120) |
+| karakeep | 111 | 2026-04-28 | decommissioned |
+| immich | 112 | 2026-04-28 | replaced by mule-images (LXC 120) |
+| reticulum | 115 | 2026-04-28 | decommissioned |
diff --git a/inventory.yaml b/inventory.yaml
index 080f43d..3eed71c 100644
--- a/inventory.yaml
+++ b/inventory.yaml
@@ -35,72 +35,118 @@ mesh:
   - tailscale
   netbird_subnet: 100.122.0.0/16
   netbird_domain: netbird.selfhosted
+# Service contract (Oikos, 2026-07-05): each service should carry
+#   backend        host/container that runs it (required)
+#   url            public URL if ingress-exposed
+#   doc_page       owning wiki page
+#   config_repo    tracked config repo, if any (mutations go commit+push)
+#   health         health-check URL if it differs from `url`
+#   risk_notes     what an agent must know before touching it
+# See oikos/ontology.yaml + oikos/policy.yaml.
 services:
   proxmox_ui:
     url: https://proxmox.hubris.network
     backend: hubris
     port: 8006
+    doc_page: hosts/hubris.md
+    risk_notes: hypervisor UI — changes here affect every guest on the node
   gitea:
     url: https://git.hubris.network
     backend: gitea
     backend_url: http://192.168.8.121:3000
+    doc_page: containers/104-gitea.md
+    config_repo: dtoro/gitea-customizations
+    risk_notes: hosts all config repos + deploy webhooks; outage blocks auto-deploy and sync
   caddy:
     backend: caddy
     role: reverse-proxy
     note: terminates all *.hubris.network
+    doc_page: containers/121-caddy.md
+    config_repo: dtoro/caddy-conf
+    risk_notes: wide blast radius — every *.hubris.network route rides on it (see oikos/policy.yaml service_overrides)
   authentik:
     url: https://auth.hubris.network
-    backend: authentik
-    dns:
+    backend: netbird-vps
+    doc_page: containers/106-auth-outpost.md
+    note: >-
+      core runs on the VPS since 2026-05-31; LAN forward-auth outpost is
+      auth-outpost (LXC 106) at 192.168.8.6:9000. Previous backend value
+      "authentik" referenced the retired embedded-outpost host (LXC 124).
+    risk_notes: SSO provider — outage locks login to OIDC/forward-auth services
+  dns:
     backend: dns
     note: Technitium DNS, split-horizon zone
+    doc_page: containers/107-dns.md
+    risk_notes: LAN-wide resolver — misconfig breaks name resolution for every client
   jellyfin:
     url: https://media.hubris.network
     backend: jellyfin
+    doc_page: containers/101-jellyfin.md
+    risk_notes: native Authentik OIDC via SSO-Auth plugin, no Caddy forward-auth gate; VAAPI transcode depends on GPU passthrough on strong
   nextcloud:
     url: https://cloud.hubris.network
     backend: nextcloud
+    doc_page: containers/114-nextcloud.md
   paperless:
     url: https://paperless.hubris.network
     backend: paperless
+    doc_page: containers/103-paperless.md
+    risk_notes: document archive — treat data as irreplaceable; DB operations are destructive-class
   matrix:
     url: https://matrix.hubris.network
     backend: elementsynapse
+    doc_page: containers/118-elementsynapse.md
+    risk_notes: alert/approval channel for Oikos — outage silences agent escalation
   photos:
     url: https://photos.hubris.network
     backend: mule-images
+    doc_page: containers/120-mule-images.md
+    config_repo: dtoro/mule-image
   arr_stack:
     backend: arriman
     note: jellyseerr / qbit / sab on docker compose
+    doc_page: containers/122-arriman.md
   artifacto:
     backend: apps
     url: https://artifacto.hubris.network
+    doc_page: containers/105-apps.md
+    config_repo: dtoro/Artifacto
   trmnl:
     backend: trmnl
     url: https://trmnl.hubris.network
     note: self-hosted middleware for TRMNL e-ink plugins (polled by TRMNL cloud)
+    doc_page: containers/128-trmnl.md
+    config_repo: dtoro/terminalito
   zimaos:
     url: https://zimaos.hubris.network
     backend: zimaos
+    doc_page: vms/100-zimaos.md
   haos:
     backend: haos
+    doc_page: vms/108-haos.md
   homelab_mcp:
     backend: apps
     port: 9810
     systemd_unit: homelab-mcp
     public_host: mcp.hubris.network
     endpoint: https://mcp.hubris.network/mcp
+    doc_page: infrastructure/homelab-context.md
+    config_repo: dtoro/Homelab-Docs
     note: MCP server. Read-only context + management. Reachable on the LAN via Caddy
       and from off-LAN via Netbird (192.168.8.0/24 is a network resource routed through
       hubris).
+    risk_notes: agents' primary read surface — outage degrades every agent to grepping the clone
   secrets_issuance:
     backend: apps
     port: 9820
     systemd_unit: secrets-issuance
     public_host: secrets.hubris.network
     endpoint: https://secrets.hubris.network/issue
+    doc_page: operations/agent-enrollment.md
+    config_repo: dtoro/Homelab-Docs
     note: Issues per-client age private keys. Gated at source-IP layer (mesh + LAN
       subnets in MESH_SUBNETS).
+    risk_notes: identity issuance — any change is security-sensitive; key operations are destructive-class
 hosts:
   hubris:
     kind: proxmox-host
@@ -374,8 +420,6 @@ hosts:
     - MariaDB sidecar at /opt/romm/docker-compose.yml.
     - ROMs on ludo-lvm media volume at /mnt/media_local/roms.
     - 1 core / 2 GiB RAM / 16 GiB rootfs (ludo-lvm).
-  # 123 (claudio-bot) — destroyed 2026-06-04, replaced by Hermes Agent
-  # 126 (plato) — destroyed 2026-06-28, notes workspace decommissioned
   zimaos:
     kind: vm
     pve_id: 100
@@ -470,3 +514,74 @@ hosts:
       netbird:
         fqdn: rclone.netbird.selfhosted
     age_pubkey: age1pwtdws2thdh7vzp2dzttl3zxgcs2tgpcsjsqgw3q04nyml4kvuqq467u4x
+
+# Destroyed nodes (lifecycle state: destroyed — see oikos/ontology.yaml).
+# Kept so agents can answer "what happened to X?" from structured data and
+# so drift detectors can flag anything still referencing them.
+# Full narrative table: containers/index.md "Recently destroyed".
+archaeology:
+  claudio-bot:
+    kind: lxc
+    pve_id: 123
+    destroyed: 2026-06-04
+    reason: replaced by Hermes Agent on mac-mini; monitoring moved to homelab-health-watchdog cron
+  plato:
+    kind: lxc
+    pve_id: 126
+    destroyed: 2026-06-28
+    reason: notes workspace decommissioned; data retained at /mnt/library/documents/plato
+  mule-photos-new:
+    kind: lxc
+    pve_id: 127
+    destroyed: 2026-05-22
+    reason: PhotoPrism test stack promoted to LXC 120 (Mulimage 2.0 merge)
+  heaper:
+    kind: lxc
+    pve_id: 116
+    destroyed: 2026-05-14
+    reason: decommissioned; data retained at /mnt/library/heaper
+  syncthing:
+    kind: lxc
+    pve_id: 109
+    destroyed: 2026-05-14
+    reason: decommissioned; library subtree was empty
+  seafile:
+    kind: lxc
+    pve_id: 125
+    destroyed: 2026-05-13
+    reason: Seafile Pro evaluation rejected; files.hubris.network removed from caddy + dns
+  arr-yunohost:
+    kind: lxc
+    pve_id: 100
+    destroyed: 2026-04-28
+    reason: migrated to docker stack on arriman (LXC 122)
+  flaresolverr:
+    kind: lxc
+    pve_id: 106
+    destroyed: 2026-04-28
+    reason: folded into the arriman docker compose
+  marimo:
+    kind: lxc
+    pve_id: 107
+    destroyed: 2026-04-28
+    reason: decommissioned
+  photoprism:
+    kind: lxc
+    pve_id: 110
+    destroyed: 2026-04-28
+    reason: replaced by mule-images (LXC 120)
+  karakeep:
+    kind: lxc
+    pve_id: 111
+    destroyed: 2026-04-28
+    reason: decommissioned
+  immich:
+    kind: lxc
+    pve_id: 112
+    destroyed: 2026-04-28
+    reason: replaced by mule-images (LXC 120)
+  reticulum:
+    kind: lxc
+    pve_id: 115
+    destroyed: 2026-04-28
+    reason: decommissioned
diff --git a/mcp/build_host_files.py b/mcp/build_host_files.py
index 10099ff..9630ebb 100755
--- a/mcp/build_host_files.py
+++ b/mcp/build_host_files.py
@@ -68,8 +68,12 @@ def build_one(name: str, entry: dict, inventory: dict) -> dict:
         "kind": entry.get("kind"),
         "os": entry.get("os"),
         "role": entry.get("role"),
+        # Oikos lifecycle (oikos/ontology.yaml); absent in inventory = active
+        "state": entry.get("state", "active"),
         "host": entry.get("host"),
         "pve_id": pve_id,
+        "storage": entry.get("storage"),
+        "depends_on": entry.get("depends_on", []),
         "lan_ip": entry.get("lan_ip"),
         "mesh": entry.get("mesh", {}),
         "mesh_globals": {
diff --git a/oikos/gen-topology.py b/oikos/gen-topology.py
new file mode 100644
index 0000000..676c02d
--- /dev/null
+++ b/oikos/gen-topology.py
@@ -0,0 +1,178 @@
+#!/usr/bin/env python3
+"""
+Generate infrastructure/topology.md (Mermaid views) from inventory.yaml.
+
+Views:
+  1. Compute & ingress — hypervisors → guests → services → public URLs
+  2. Storage — mounts and pools per guest
+
+Run from the repo root:
+    python3 oikos/gen-topology.py            # writes infrastructure/topology.md
+    python3 oikos/gen-topology.py --check    # exit 1 if output would change
+
+Wired into the same regeneration path as mcp/build_host_files.py so the
+diagrams never drift from inventory. Edges follow oikos/ontology.yaml
+(hosts, provides, routes-to, mounts, stores-on).
+"""
+
+from __future__ import annotations
+
+import argparse
+import sys
+from pathlib import Path
+
+try:
+    import yaml
+except ImportError:  # pragma: no cover
+    print("PyYAML is required: pip install pyyaml", file=sys.stderr)
+    sys.exit(2)
+
+REPO = Path(__file__).resolve().parent.parent
+INVENTORY = REPO / "inventory.yaml"
+OUTPUT = REPO / "infrastructure" / "topology.md"
+
+BANNER = (
+    "<!-- Generated by oikos/gen-topology.py from inventory.yaml. -->\n"
+    "<!-- Do NOT edit by hand - your changes will be overwritten. -->\n"
+)
+
+
+def node_id(name: str) -> str:
+    """Mermaid-safe node id."""
+    return name.replace("-", "_").replace(".", "_").replace("/", "_").strip("_")
+
+
+def guest_label(name: str, entry: dict) -> str:
+    pve = entry.get("pve_id")
+    role = entry.get("role", "")
+    tag = f"LXC {pve}" if entry.get("kind") == "lxc" and pve else \
+          f"VM {pve}" if entry.get("kind") == "vm" and pve else entry.get("kind", "")
+    ip = entry.get("lan_ip", "")
+    parts = [name, tag, role, ip]
+    return "<br/>".join(str(p) for p in parts if p)
+
+
+def compute_view(inv: dict) -> list[str]:
+    hosts = inv.get("hosts", {})
+    services = inv.get("services", {})
+    lines = ["```mermaid", "flowchart LR"]
+
+    hypervisors = {n: e for n, e in hosts.items() if e.get("kind") == "proxmox-host"}
+    guests = {n: e for n, e in hosts.items() if e.get("kind") in ("lxc", "vm")}
+    others = {n: e for n, e in hosts.items()
+              if e.get("kind") in ("workstation", "external")}
+
+    for hv in hypervisors:
+        lines.append(f'    subgraph {node_id(hv)}_sub["{hv} (Proxmox)"]')
+        for g, e in guests.items():
+            if e.get("host") == hv:
+                lines.append(f'        {node_id(g)}["{guest_label(g, e)}"]')
+        lines.append("    end")
+
+    # guests without a parent hypervisor recorded (e.g. rclone)
+    for g, e in guests.items():
+        if e.get("host") not in hypervisors:
+            lines.append(f'    {node_id(g)}["{guest_label(g, e)}"]')
+
+    for n, e in others.items():
+        shape = "([{}])" if e.get("kind") == "workstation" else "[[{}]]"
+        lines.append(f'    {node_id(n)}{shape.format(guest_label(n, e))}')
+
+    # ingress: public URL -> backend (routes-to)
+    for svc, e in sorted(services.items()):
+        if not isinstance(e, dict):
+            continue
+        backend = e.get("backend")
+        url = e.get("url") or (
+            f'https://{e["public_host"]}' if e.get("public_host") else None)
+        if backend and url and backend in hosts:
+            host = url.removeprefix("https://").removeprefix("http://")
+            # hypervisors are rendered as subgraphs; point edges at the subgraph id
+            target = node_id(backend) + ("_sub" if backend in hypervisors else "")
+            lines.append(
+                f'    {node_id("url_" + svc)}(["{host}"]) -->|routes-to| {target}')
+
+    lines.append("```")
+    return lines
+
+
+def storage_view(inv: dict) -> list[str]:
+    hosts = inv.get("hosts", {})
+    lines = ["```mermaid", "flowchart LR"]
+    pools: set[str] = set()
+    edges: list[str] = []
+
+    for name, e in hosts.items():
+        for mount in e.get("mounts", []):
+            pools.add(mount)
+            edges.append(f'    {node_id(name)}["{name}"] -->|mounts| {node_id(mount)}')
+
+    for pool in sorted(pools):
+        lines.append(f'    {node_id(pool)}[("{pool}")]')
+    lines.extend(sorted(set(edges)))
+    lines.append("```")
+    return lines
+
+
+def archaeology_table(inv: dict) -> list[str]:
+    arch = inv.get("archaeology", {})
+    if not arch:
+        return []
+    lines = ["| Node | ID | Destroyed | Reason |", "|---|---|---|---|"]
+    entries = sorted(arch.items(), key=lambda kv: str(kv[1].get("destroyed", "")),
+                     reverse=True)
+    for name, e in entries:
+        lines.append(
+            f'| {name} | {e.get("pve_id", "")} | {e.get("destroyed", "")} '
+            f'| {e.get("reason", "")} |')
+    return lines
+
+
+def render(inv: dict) -> str:
+    hosts = inv.get("hosts", {})
+    services = inv.get("services", {})
+    counts = (
+        f"{sum(1 for e in hosts.values() if e.get('kind') == 'proxmox-host')} hypervisors, "
+        f"{sum(1 for e in hosts.values() if e.get('kind') == 'lxc')} LXCs, "
+        f"{sum(1 for e in hosts.values() if e.get('kind') == 'vm')} VMs, "
+        f"{sum(1 for e in hosts.values() if e.get('kind') == 'workstation')} workstations, "
+        f"{len(services)} services"
+    )
+    parts = [
+        BANNER,
+        "# Topology (generated)\n",
+        f"Source: [inventory.yaml](../inventory.yaml) — {counts}.",
+        "Edge semantics: [oikos/ontology.yaml](../oikos/ontology.yaml). "
+        "Operating model: [OIKOS.md](../OIKOS.md).\n",
+        "## Compute & ingress\n",
+        "\n".join(compute_view(inv)) + "\n",
+        "## Storage (mounts)\n",
+        "\n".join(storage_view(inv)) + "\n",
+    ]
+    arch = archaeology_table(inv)
+    if arch:
+        parts += ["## Archaeology (destroyed nodes)\n", "\n".join(arch) + "\n"]
+    return "\n".join(parts)
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--check", action="store_true",
+                        help="exit 1 if output would change (don't write)")
+    args = parser.parse_args()
+
+    inv = yaml.safe_load(INVENTORY.read_text())
+    content = render(inv)
+    existing = OUTPUT.read_text() if OUTPUT.exists() else ""
+    if existing == content:
+        return 0
+    if args.check:
+        print(f"{OUTPUT.relative_to(REPO)} would change", file=sys.stderr)
+        return 1
+    OUTPUT.write_text(content)
+    print(f"wrote {OUTPUT.relative_to(REPO)}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/oikos/ontology.yaml b/oikos/ontology.yaml
new file mode 100644
index 0000000..d7d8056
--- /dev/null
+++ b/oikos/ontology.yaml
@@ -0,0 +1,137 @@
+# Oikos ontology — the systems model of the homelab.
+#
+# This file defines the closed vocabulary Oikos reasons with: entity
+# types (grouped into eight domains), typed relationships (with inverses),
+# and the node lifecycle. inventory.yaml holds the *instances*; this file
+# defines what those instances and their fields MEAN, so agents, the
+# decision classifier, and the topology generator interpret them
+# identically. See OIKOS.md for the operating model.
+#
+# Rule of completeness: if something can break, be changed, or hold data,
+# it has an entity type here and edges to the things it touches.
+
+domains:
+  physical:
+    description: Hardware and environment.
+    entity_types: [site, machine, ups, sensor, peripheral]
+  compute:
+    description: Things that execute workloads.
+    entity_types: [proxmox-host, lxc, vm, workstation, external-host, device]
+  network:
+    description: How things reach each other.
+    entity_types: [lan, mesh, dns-zone, dns-record, ingress-route, certificate, firewall-rule]
+  storage:
+    description: Where data lives and how it survives.
+    entity_types: [storage-pool, volume, mount, backup-target, dataset]
+  software:
+    description: What runs and how it is configured and shipped.
+    entity_types: [service, application, config-repo, package-set, deploy-pipeline]
+  identity_access:
+    description: Who and what may do which things.
+    entity_types: [person, identity-provider, account, secret, key, access-grant]
+  operations:
+    description: The OS's own working objects.
+    entity_types: [agent, runbook, plan, change, incident, signal, approval, report]
+  external:
+    description: Dependencies outside the lab's control.
+    entity_types: [domain-registration, cloud-service, isp-link, vendor-dependency]
+
+# Relationships. `source:` says which inventory/repo data expresses the edge
+# today (thin = not yet structured, derive from docs until backfilled).
+relationships:
+  hosts:
+    inverse: runs-on
+    example: hubris hosts lxc:apps
+    source: hosts.<lxc>.host + pve_id
+  provides:
+    inverse: provided-by
+    example: lxc:apps provides service:homelab_mcp
+    source: hosts.<name>.runs + services.<svc>.backend
+  mounts:
+    inverse: mounted-by
+    example: lxc:jellyfin mounts /mnt/media_local from strong
+    source: hosts.<name>.mounts (extend with from:)
+  stores-on:
+    inverse: stores-for
+    example: lxc:jellyfin rootfs stores-on storage-pool:ludo-lvm
+    source: hosts.<name>.storage (new field)
+  routes-to:
+    inverse: routed-via
+    example: ingress-route:media.hubris.network routes-to service:jellyfin
+    source: services.<svc>.url/public_host + dtoro/caddy-conf
+  resolves-to:
+    inverse: resolved-from
+    example: dns-record:media.hubris.network resolves-to caddy lan_ip
+    source: Technitium split-horizon zone (LXC 107) + dns-sync job
+  secured-by:
+    inverse: secures
+    example: ingress-route:paperless secured-by identity-provider:authentik
+    source: caddy-conf forward-auth blocks + service auth notes
+  authenticates-via:
+    inverse: authenticates
+    example: service:jellyfin authenticates-via authentik (native OIDC)
+    source: services.<svc>.auth (new field, from risk_notes/docs)
+  connects-via:
+    inverse: connects
+    example: workstation:mac-mini connects-via mesh:netbird
+    source: hosts.<name>.mesh
+  can-decrypt:
+    inverse: readable-by
+    example: lxc:apps can-decrypt secret:gitea-pat
+    source: .sops.yaml path rules + hosts.<name>.age_pubkey
+  configured-by:
+    inverse: configures
+    example: lxc:caddy configured-by config-repo:dtoro/caddy-conf
+    source: services.<svc>.config_repo (new field)
+  deploys-to:
+    inverse: deployed-from
+    example: deploy-pipeline:webhook-10 deploys-to /opt/homelab-mcp on lxc:apps
+    source: infrastructure/auto-deploy.md table
+  monitors:
+    inverse: monitored-by
+    example: agent:scheduler monitors service:* (Week 3)
+    source: oikos/scheduler config
+  depends-on:
+    inverse: dependency-of
+    example: service:paperless depends-on service:authentik
+    source: hosts/services depends_on (new field)
+  backs-up-to:
+    inverse: backup-of
+    example: dataset:nextcloud-data backs-up-to backup-target:proton-drive
+    source: infrastructure backups docs → structured field (thin)
+  documents:
+    inverse: documented-by
+    example: containers/101-jellyfin.md documents lxc:jellyfin
+    source: generated see_also / services.<svc>.doc_page
+  powered-by:
+    inverse: powers
+    example: machine:hubris powered-by ups (future, thin record)
+    source: physical domain (thin)
+  registered-with:
+    inverse: registrar-of
+    example: domain-registration:hubris.network registered-with registrar
+    source: external domain (thin)
+
+# Node lifecycle. Stored as `state:` on each inventory host entry
+# (absent = active, for backward compatibility). Transitions are runbooks
+# (Week 2); drift detectors (Week 3) verify declared state matches reality.
+lifecycle:
+  states: [planned, provisioning, active, migrating, deprecated, destroyed]
+  default: active
+  transitions:
+    planned->provisioning:
+      requires: [inventory-entry, ip-reserved, storage-pool-chosen, doc-page-stub]
+    provisioning->active:
+      requires: [age-key-enrolled-if-needed, mesh-joined-if-needed,
+                 ingress-live-if-public, health-check-answering,
+                 doc-page-complete, ledger-entry]
+    active->migrating:
+      requires: [preflight, backup-verified]
+    migrating->active:
+      requires: [post-verify, caddy-backends-checked, mounts-checked, docs-updated]
+    active->deprecated:
+      requires: [replacement-live-or-role-retired]
+      complete_when: no inbound depends-on / routes-to edges remain
+    deprecated->destroyed:
+      requires: [backups-verified, secrets-revoked-and-rekeyed,
+                 ingress-and-dns-removed, archaeology-entry, ledger-entry]
diff --git a/oikos/policy.yaml b/oikos/policy.yaml
new file mode 100644
index 0000000..46c3544
--- /dev/null
+++ b/oikos/policy.yaml
@@ -0,0 +1,117 @@
+# Oikos risk & approval policy — machine-readable safety model.
+#
+# Every operation an agent can perform maps to exactly one risk class.
+# The decision classifier (oikos/decide.py, Week 3) and the homelab CLI
+# consult this file before executing; agents consult it before proposing.
+# See OIKOS.md for the operating model.
+#
+# Autonomy default (operator decision 2026-07-05): unattended agents may
+# perform read_only and reversible_low actions; config_mutation and
+# destructive always require operator approval.
+
+risk_classes:
+  read_only:
+    description: Observes state; cannot change anything.
+    approval: none
+    ledger: false
+  reversible_low:
+    description: >-
+      Changes runtime state in a way a single follow-up command undoes
+      (restart, cache clear, sync pull). No config or data changes.
+    approval: none
+    ledger: true            # every mutation leaves a ledger entry
+  config_mutation:
+    description: >-
+      Changes tracked configuration or deployed software: repo edit + push,
+      deploy pipeline trigger, Caddy/Gitea/app config, package upgrades.
+      Reversible via git, but affects other consumers.
+    approval: operator      # Matrix ✅/❌ reaction (Week 3 approval engine)
+    ledger: true
+  destructive:
+    description: >-
+      Destroys or irreversibly alters data/entities: container destroy,
+      disk format, DB wipe, secret rotation, client revocation.
+    approval: operator_confirmed   # approval + typed confirmation phrase
+    ledger: true
+
+# Lifecycle gates (see ontology.yaml lifecycle):
+#   provisioning: config_mutation downgraded to reversible_low (no dependents yet)
+#   deprecated:   adding new inbound edges (depends-on/routes-to) is refused
+#   destroyed:    any action targeting the entity raises a drift signal
+lifecycle_overrides:
+  provisioning:
+    config_mutation: reversible_low
+  deprecated:
+    refuse: [new-inbound-edges]
+  destroyed:
+    refuse: [all]
+
+# homelab CLI subcommands → risk class
+commands:
+  whoami: read_only
+  list: read_only
+  status: read_only
+  logs: read_only
+  open: read_only
+  ssh-keyscan: read_only
+  apt-audit: read_only
+  mcp: read_only            # MCP tools are individually classified below
+  secret: read_only         # decrypt-to-stdout; never write secrets to files/docs
+  ssh: read_only            # interactive shell itself; actions inside it carry
+                            # their own class — agents must not use raw ssh to
+                            # bypass policy (HERMES.md convention)
+  sync: reversible_low
+  refresh-creds: reversible_low
+  ssh-config: reversible_low     # rewrites ~/.ssh/config, regenerable
+  apt-upgrade: config_mutation
+  render-vps-configs: config_mutation
+  client-add: config_mutation
+  client-remove: destructive     # revokes key + re-keys all secrets
+
+# MCP tools → risk class (all currently read-only by design)
+mcp_tools:
+  get_host: read_only
+  list_services: read_only
+  find_service: read_only
+  get_topology: read_only
+  search_docs: read_only
+  get_page: read_only
+  get_changelog: read_only
+  whoami: read_only
+  get_service_status: read_only
+  tail_log: read_only
+  list_lxcs: read_only
+  get_lxc_state: read_only
+  ping_service: read_only
+  list_my_secrets: read_only
+
+# Common operational actions (not yet CLI subcommands) → risk class.
+# Used by agents to classify ad-hoc work until Week 2/3 wraps them in
+# `homelab service` / runbooks.
+actions:
+  service-restart: reversible_low
+  cache-clear: reversible_low
+  docker-compose-restart: reversible_low
+  tracked-config-edit: config_mutation     # commit+push to config repo, never local edit
+  deploy-webhook-trigger: config_mutation
+  lxc-create: config_mutation              # new entity, state: provisioning
+  lxc-migrate: config_mutation
+  dns-record-change: config_mutation
+  ingress-route-change: config_mutation
+  secret-rotate: destructive
+  lxc-destroy: destructive
+  disk-format: destructive
+  db-wipe: destructive
+  storage-pool-change: destructive
+
+# Per-service overrides (schema ready; populate as needs emerge).
+# Example:
+#   jellyfin:
+#     service-restart: reversible_low     # default anyway
+#   caddy:
+#     service-restart: config_mutation    # wide blast radius: all ingress
+service_overrides:
+  caddy:
+    service-restart: config_mutation     # everything *.hubris.network rides on it
+  dns:
+    service-restart: config_mutation     # LAN-wide resolver