fix(lib): accept extra snowfall args

Snowfall mkLib/mkFlake imports all submodules with a shared argument set, so narrow lambdas crash when snowfall-config is present. Allow extra args and add an evaluation check to catch regressions during flake checks.

flake.nix

@@ -87,6 +87,25 @@
 
       formatter = eachSystemMap systems (system: treefmtEval.${system}.config.build.wrapper);
 
+      # Regression check: force snowfall-lib evaluation so unexpected-arg errors fail in `nix flake check`.
+      checks = eachSystemMap systems (
+        system:
+        let
+          pkgs = inputs.nixpkgs.legacyPackages.${system};
+          lib = mkLib {
+            src = self;
+            inputs = inputs // {
+              self = { };
+            };
+          };
+          eval = builtins.tryEval (builtins.attrNames lib.snowfall);
+        in
+        assert eval.success;
+        {
+          snowfall-lib-eval = pkgs.runCommand "snowfall-lib-eval" { } "mkdir -p $out";
+        }
+      );
+
       snowfall = rec {
         raw-config = config;
 

snowfall-lib/attrs/default.nix

@@ -1,5 +1,6 @@
 {
   core-inputs,
+  ...
 }:
 let
   inherit (core-inputs.nixpkgs.lib)

snowfall-lib/checks/default.nix

@@ -1,5 +1,6 @@
 {
   snowfall-lib,
+  ...
 }:
 {
   check = {

snowfall-lib/fp/default.nix

@@ -1,5 +1,6 @@
 {
   core-inputs,
+  ...
 }:
 let
   inherit (core-inputs.nixpkgs.lib) id foldr flip;

snowfall-lib/path/default.nix

@@ -1,6 +1,7 @@
 {
   core-inputs,
   snowfall-lib,
+  ...
 }:
 let
   inherit (builtins)

snowfall-lib/shell/default.nix

@@ -1,5 +1,6 @@
 {
   snowfall-lib,
+  ...
 }:
 {
   shell = {

snowfall-lib/template/default.nix

@@ -1,6 +1,6 @@
 {
-  core-inputs,
   snowfall-lib,
+  ...
 }:
 let