feat(actions): scoped Proxmox power channel

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/actions/channels/proxmox.js

@@ -0,0 +1,16 @@
+// Proxmox guest power via a SCOPED PVEAPIToken (VM.PowerMgmt on whitelisted guests
+// only). PVE enforces permissions server-side; this adapter never builds shell commands.
+export async function powerGuest({ node, vmid, op, kindPath = 'lxc' }, {
+  apiUrl = process.env.PROXMOX_API_URL,
+  token = process.env.PROXMOX_API_TOKEN,
+  fetchImpl = fetch
+} = {}) {
+  const url = `${apiUrl}/api2/json/nodes/${node}/${kindPath}/${vmid}/status/${op}`;
+  const res = await fetchImpl(url, {
+    method: 'POST',
+    headers: { Authorization: `PVEAPIToken=${token}` }
+  });
+  if (!res.ok) throw new Error(`proxmox ${op} ${vmid} → ${res.status} ${await res.text?.() ?? ''}`);
+  const body = await res.json();
+  return { ok: true, upid: body?.data ?? null };
+}

tests/actions/proxmox.test.js

@@ -0,0 +1,20 @@
+import { describe, it, expect, vi } from 'vitest';
+import { powerGuest } from '../../lib/actions/channels/proxmox.js';
+
+describe('proxmox channel', () => {
+  it('POSTs the scoped power op with the token header', async () => {
+    const fetchMock = vi.fn(async () => ({ ok: true, status: 200, json: async () => ({ data: 'UPID:...' }) }));
+    const out = await powerGuest({ node: 'z', vmid: 107, op: 'stop', kindPath: 'lxc' },
+      { apiUrl: 'https://pve:8006', token: 'user@pve!void=secret', fetchImpl: fetchMock });
+    expect(out.ok).toBe(true);
+    const [url, opts] = fetchMock.mock.calls[0];
+    expect(url).toBe('https://pve:8006/api2/json/nodes/z/lxc/107/status/stop');
+    expect(opts.method).toBe('POST');
+    expect(opts.headers.Authorization).toBe('PVEAPIToken=user@pve!void=secret');
+  });
+  it('throws on a non-ok response', async () => {
+    const fetchMock = vi.fn(async () => ({ ok: false, status: 403, text: async () => 'forbidden' }));
+    await expect(powerGuest({ node: 'z', vmid: 1, op: 'stop', kindPath: 'lxc' },
+      { apiUrl: 'https://pve:8006', token: 't', fetchImpl: fetchMock })).rejects.toThrow(/403/);
+  });
+});