diff --git a/nt/primitives/CHECK_LIST.md b/nt/primitives/CHECK_LIST.md
index dd9f07a..e95e2a5 100644
--- a/nt/primitives/CHECK_LIST.md
+++ b/nt/primitives/CHECK_LIST.md
@@ -1 +1,35 @@
-- [ ] rename all ' suffixed unsafe functions to Unsafe suffixed functions
+- [ ] implement isomorphisms (especially from primitives to NixTypes)
+
+
+A Generic Type/Class could be implement to use like:
+```nix
+# NOTE: this example is COMPLETELY overkill, it's just an example
+isAttrs x
+|> as Maybe # type coercion via isomorphisms
+|> match [
+  (Some (Generic Bool) |> case (t: throw "t is from Generic, see \"nix:Bool\"=${typeOf t}"))
+  (None                |> case (_: throw "not attrs"))
+]
+
+isAttrs x
+|> as Maybe # type coercion via isomorphisms
+|> (match <| Pattern (Some (Generic Bool)) (t: throw "t is from Generic, see \"nix:Bool\"=${typeOf t}")
+          <| Pattern None (_: throw "not attrs"))
+
+
+# Rust inspired pattern matching syntax:
+# resultA = match [platform arch] [
+#   (Pattern ["darwin" Any]                         darwin_package)
+#   (Pattern ["openbsd" "x86_64"]                   openbsd_x86_64_package)
+#   (Pattern [(x: x == "linux") (y: y == "x86_64")] linux_x86_64_package)
+#   (Pattern (x: y: x == "linux" && y == "aarch64") linux_aarch64_package)
+#   (Pattern Any                                    default_package)
+# ];
+# resultB = match [platform arch] [
+#   (["darwin" Any]                         |> case darwin_package)
+#   (["openbsd" "x86_64"]                   |> case openbsd_x86_64_package)
+#   ([(x: x == "linux") (y: y == "x86_64")] |> case linux_x86_64_package)
+#   ((x: y: x == "linux" && y == "aarch64") |> case linux_aarch64_package)
+#   (Any                                    |> case default_package)
+# ];
+```