fix(node-agent): bind nvidia-smi for full GPU info (name, VRAM, driver)

index.js:
- detectGpusViaSmi(): runs nvidia-smi --query-gpu=index,name,memory.total,
  driver_version and parses the output into structured GPU objects with
  name, memory_mb, driver, device — the same fields the cluster UI uses
  to determine BOUND status
- Falls back to /dev/nvidia* file scan if nvidia-smi isn't available

docker-compose.worker.yml:
- Bind-mount /usr/bin/nvidia-smi and libnvidia-ml.so.1 from host into
  node-agent container (read-only). These are the minimum binaries needed
  for nvidia-smi to execute inside the container.
- Mounts are optional — Docker ignores them silently if paths don't exist
  (e.g. on nodes without NVIDIA hardware)

docker-compose.worker.yml

@@ -55,6 +55,12 @@ services:
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
       - /dev:/dev:ro
+      # Bind-mount nvidia-smi + driver libs so the agent can query GPU details.
+      # These paths match Ubuntu installations with driver 595+. The mounts are
+      # optional — if the binaries don't exist on the host, Docker silently
+      # ignores them and the agent falls back to /dev/nvidia* file detection.
+      - /usr/bin/nvidia-smi:/usr/bin/nvidia-smi:ro
+      - /usr/lib/x86_64-linux-gnu/libnvidia-ml.so.1:/usr/lib/x86_64-linux-gnu/libnvidia-ml.so.1:ro
     devices:
       - /dev/blackmagic:/dev/blackmagic
 

services/node-agent/index.js

@@ -182,6 +182,33 @@ function sampleCpu() {
 
 // ── Hardware detection ────────────────────────────────────────────────────
 // GPU_COUNT / BMD_COUNT env vars override filesystem detection when /dev isn't mapped
+function detectGpusViaSmi() {
+  // Try nvidia-smi for rich GPU info (name, memory, driver).
+  // nvidia-smi binary is bind-mounted from the host via docker-compose.worker.yml.
+  // Returns [] if not available or if no GPUs are present.
+  try {
+    const { execFileSync } = require('child_process');
+    const out = execFileSync(
+      'nvidia-smi',
+      ['--query-gpu=index,name,memory.total,driver_version', '--format=csv,noheader,nounits'],
+      { timeout: 5000, encoding: 'utf8' }
+    );
+    return out.trim().split('\n').filter(Boolean).map(line => {
+      const [idx, name, memMiB, driver] = line.split(',').map(s => s.trim());
+      return {
+        index:      parseInt(idx, 10),
+        name:       name,
+        memory_mb:  parseInt(memMiB, 10),
+        driver:     driver,
+        device:     `/dev/nvidia${idx}`,
+        type:       'nvidia',
+      };
+    });
+  } catch (_) {
+    return null; // nvidia-smi not available or failed — fall back to /dev scan
+  }
+}
+
 function detectHardware() {
   const capabilities = { gpus: [], blackmagic: [] };
 
@@ -190,6 +217,11 @@ function detectHardware() {
     for (let i = 0; i < gpuOverride; i++) {
       capabilities.gpus.push({ device: `/dev/nvidia${i}`, type: 'nvidia', index: i });
     }
+  } else {
+    // Try nvidia-smi first for full GPU details; fall back to /dev file scan
+    const smiGpus = detectGpusViaSmi();
+    if (smiGpus !== null) {
+      capabilities.gpus = smiGpus;
     } else {
       for (let i = 0; i < 16; i++) {
         try {
@@ -198,6 +230,7 @@ function detectHardware() {
         } catch (_) { break; }
       }
     }
+  }
 
   const bmdOverride = parseInt(process.env.BMD_COUNT || '-1', 10);
   if (bmdOverride >= 0) {