diff --git a/mapgen/go.mod b/mapgen/go.mod
new file mode 100644
index 0000000..787464e
--- /dev/null
+++ b/mapgen/go.mod
@@ -0,0 +1,9 @@
+module mapgen
+
+go 1.25.5
+
+require (
+	golang.org/x/mod v0.35.0 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/tools v0.44.0 // indirect
+)
diff --git a/mapgen/go.sum b/mapgen/go.sum
new file mode 100644
index 0000000..d570929
--- /dev/null
+++ b/mapgen/go.sum
@@ -0,0 +1,6 @@
+golang.org/x/mod v0.35.0 h1:Ww1D637e6Pg+Zb2KrWfHQUnH2dQRLBQyAtpr/haaJeM=
+golang.org/x/mod v0.35.0/go.mod h1:+GwiRhIInF8wPm+4AoT6L0FA1QWAad3OMdTRx4tFYlU=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
+golang.org/x/tools v0.44.0 h1:UP4ajHPIcuMjT1GqzDWRlalUEoY+uzoZKnhOjbIPD2c=
+golang.org/x/tools v0.44.0/go.mod h1:KA0AfVErSdxRZIsOVipbv3rQhVXTnlU6UhKxHd1seDI=
diff --git a/mapgen/main.go b/mapgen/main.go
new file mode 100644
index 0000000..b335654
--- /dev/null
+++ b/mapgen/main.go
@@ -0,0 +1,32 @@
+package main
+
+import (
+	"fmt"
+	"go/token"
+
+	"golang.org/x/tools/go/packages"
+)
+
+func main() {
+	cfg := &packages.Config{
+		Mode: packages.NeedTypes,
+	}
+
+	pkgs, err := packages.Load(cfg, "fmt")
+	if err != nil {
+		panic(err)
+	}
+
+	for _, pkg := range pkgs {
+		scope := pkg.Types.Scope()
+
+		for _, name := range scope.Names() {
+			if !token.IsExported(name) {
+				continue
+			}
+
+			obj := scope.Lookup(name)
+			fmt.Println(name, obj.Type())
+		}
+	}
+}