docs: add CLAUDE.md pointing to key project documentation

Links to PROJECT-MEMORY.md and DECISIONS.md for development rules
and architectural decisions, plus quick commands and doc index.

internal/middleware/recovery_test.go

@@ -0,0 +1,69 @@
+package middleware
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestRecovery(t *testing.T) {
+	t.Run("Recovers from panic", func(t *testing.T) {
+		// Handler that panics
+		panicHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			panic("test panic")
+		})
+
+		handler := Recovery(panicHandler)
+
+		req := httptest.NewRequest(http.MethodGet, "/", nil)
+		w := httptest.NewRecorder()
+
+		// Should not panic
+		handler.ServeHTTP(w, req)
+
+		if w.Code != http.StatusInternalServerError {
+			t.Errorf("Status = %d, want %d", w.Code, http.StatusInternalServerError)
+		}
+	})
+
+	t.Run("Passes through normal requests", func(t *testing.T) {
+		normalHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.WriteHeader(http.StatusOK)
+			_, _ = w.Write([]byte("OK"))
+		})
+
+		handler := Recovery(normalHandler)
+
+		req := httptest.NewRequest(http.MethodGet, "/", nil)
+		w := httptest.NewRecorder()
+
+		handler.ServeHTTP(w, req)
+
+		if w.Code != http.StatusOK {
+			t.Errorf("Status = %d, want %d", w.Code, http.StatusOK)
+		}
+
+		if w.Body.String() != "OK" {
+			t.Errorf("Body = %q, want %q", w.Body.String(), "OK")
+		}
+	})
+
+	t.Run("Recovers from nil panic", func(t *testing.T) {
+		nilPanicHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			var p *int = nil
+			_ = *p // This will cause a nil pointer dereference
+		})
+
+		handler := Recovery(nilPanicHandler)
+
+		req := httptest.NewRequest(http.MethodGet, "/", nil)
+		w := httptest.NewRecorder()
+
+		// Should not panic
+		handler.ServeHTTP(w, req)
+
+		if w.Code != http.StatusInternalServerError {
+			t.Errorf("Status = %d, want %d", w.Code, http.StatusInternalServerError)
+		}
+	})
+}