deploy/hyperborea: production config, user unit, install script, README (wake block pending titan's MAC)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-09-25 12:57:25 -07:00
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+# crossbar on hyperborea
+
+crossbar runs on **hyperborea** (Raspberry Pi, Debian 13, aarch64) as a `systemd --user` unit,
+bound to its tailnet address only. Clients on the tailnet reach it at
+
+    http://hyperborea.scylla-hammerhead.ts.net:7777/<route>/v1
+
+Why hyperborea: it is always on, wired on titan's LAN segment (`192.168.88.154`, which
+wake-on-LAN needs — magic packets are L2 broadcast), and not itself an inference host, so a
+router rebuild or a sleeping titan never takes crossbar down with it.
+
+## Files
+
+| file | purpose |
+|---|---|
+| `crossbar.toml` | the production config: hosts titan/straylight/dixie with their configured models and `parallel`, the routes |
+| `crossbar.service` | the user unit (`/srv/crossbar`, `Restart=always`) |
+| `install.sh` | cross-compiles for arm64 on the machine you run it from, copies binary + config + unit, restarts, prints the hosts view |
+
+On hyperborea: binary, config and SQLite database live in `/srv/crossbar/`; the unit is
+`~/.config/systemd/user/crossbar.service` (`loginctl` linger is on, so it survives logout).
+
+## Install / upgrade
+
+    deploy/hyperborea/install.sh          # from any checkout on a host with Go 1.26 and ssh to hyperborea
+
+Re-running upgrades in place (binary is replaced atomically, the unit restarted; leases persist in
+the database). Config-only changes: edit `crossbar.toml`, re-run.
+
+## Verify
+
+    curl -s http://hyperborea.scylla-hammerhead.ts.net:7777/_crossbar/hosts | jq .
+    curl -s http://hyperborea.scylla-hammerhead.ts.net:7777/_crossbar/routes | jq .
+    curl -s 'http://hyperborea.scylla-hammerhead.ts.net:7777/_crossbar/usage?by=route'
+    ssh hyperborea journalctl --user -u crossbar -f
+
+A cheap end-to-end check uses the `probe` route (dixie's 9B first):
+
+    curl -s -D - -X POST -H 'Content-Type: application/json' \
+      -d '{"model":"ornith-1.5-9b-uncensored","max_tokens":8,"messages":[{"role":"user","content":"Reply with pong."}]}' \
+      http://hyperborea.scylla-hammerhead.ts.net:7777/probe/v1/chat/completions
+
+The response carries `X-Crossbar-Host` (which router served it) and `X-Crossbar-Lease`
+(`new` or `reused`).
+
+## Pointing clients at it
+
+OpenCode (project-local `opencode.json`, or the global one with a per-project route):
+
+```jsonc
+"provider": { "crossbar": { "npm": "@ai-sdk/openai-compatible",
+  "options": { "baseURL": "http://hyperborea.scylla-hammerhead.ts.net:7777/opencode-a/v1" },
+  "models": { "ornith-1.5-35b-a3b": {} } } }
+```
+
+Hermes (`custom_providers[].base_url`, and the same in `delegation`/`auxiliary` blocks):
+
+    base_url: http://hyperborea.scylla-hammerhead.ts.net:7777/hermes-straylight/v1
+
+Routes must exist in `crossbar.toml`; an unknown first path segment is `404 unknown route`.
+**Known gap:** `PLAN.md`'s one-route-per-instance launcher (`CROSSBAR_ROUTE="$(basename "$PWD")-$$"`)
+needs a route *template* (e.g. `[routes."opencode-*"]`) that the code does not have yet; until
+then add each instance's route explicitly.
+
+## Wake-on-LAN for titan
+
+The `[hosts.titan.wake]` block is present but commented out until the MAC is settled. Titan is on
+Wi-Fi (active private address `5e:fc:f2:3f:23:6b`, hardware `60:3e:5f:33:6f:b8`) with its dock's
+three Ethernet ports (`d2:30:99:9a:ee:03/04/05`) unplugged. Wired + `womp 1` is the reliable path;
+magic-packet wake over Wi-Fi on Apple Silicon is not guaranteed and the private address may
+rotate. Broadcast address is `192.168.88.255:9`.
+
+## Security notes
+
+- The bind is the tailnet address; only tailnet members can reach it. `identity = "tailscale"`
+  with per-route `peers` is available when a route should be limited to named nodes;
+  `tailscale whois` already works unprivileged on hyperborea.
+- Plain HTTP over the tailnet is WireGuard-encrypted on the wire. Hermes agents' *terminal*
+  calls to this URL may trip tirith's `plain_http_to_sink`; prefer the MagicDNS name (never the
+  raw IP) and add a rule-scoped trust entry rather than `--broad` if a prompt recurs. Provider
+  traffic from the OpenAI client library is not scanned by tirith.
+- Bodies are never logged or stored; the database holds leases and per-request accounting only.