feat: LLM accuracy testing framework with 17-test catalog

Framework runs a category/subcategory test catalog against multiple
LLMs through an OpenAI-compatible endpoint. Deterministic evaluators
score each response. Reports render as table, markdown, or JSON.

internal/eval/regex_test.go

@@ -0,0 +1,36 @@
+package eval
+
+import (
+	"context"
+	"testing"
+)
+
+func TestRegex(t *testing.T) {
+	tests := []struct {
+		name     string
+		pattern  string
+		response string
+		want     float64
+	}{
+		{"matches", `ssh\s+root@10\.0\.0\.100`, "run: ssh [email protected] 'pct exec 251 -- systemctl status myservice'", 1},
+		{"no match", `ssh\s+root@10\.0\.0\.100`, "ssh [email protected]", 0},
+		{"anchored word boundary", `\bpct exec 251\b`, "use pct exec 251 -- cmd", 1},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := Regex(tt.pattern).Evaluate(context.Background(), tt.response)
+			if got.Value != tt.want {
+				t.Errorf("Regex(%q).Evaluate(%q) = %v, want %v", tt.pattern, tt.response, got.Value, tt.want)
+			}
+		})
+	}
+}
+
+func TestRegex_PanicsOnInvalidPattern(t *testing.T) {
+	defer func() {
+		if r := recover(); r == nil {
+			t.Fatal("Regex() with invalid pattern did not panic")
+		}
+	}()
+	Regex(`(unclosed`)
+}