fix: keep plugin tailwind variants in core's layer so overrides keep their order

packages/plugin-sdk/CHANGELOG.md

@@ -4,7 +4,7 @@
 
 ### Fixed
 
-- `termix-plugin build` puts a plugin's own Tailwind classes in core's utilities layer, so responsive, hover and group variants and `className` overrides on SDK components work. Classes core already ships stay below core's utilities as before. Rebuild a plugin to pick it up
+- `termix-plugin build` puts a plugin's own Tailwind classes in core's utilities layer, so responsive, hover and group variants and `className` overrides on SDK components work. Plain classes core already ships stay below core's utilities as before, while variants core ships go with the plugin's own so `max-h-56 md:max-h-none` keeps its order. Rebuild a plugin to pick it up
 
 ## 1.0.3
 

packages/plugin-sdk/cli/lib/css-classes.mjs

@@ -20,16 +20,18 @@ export function classNamesInCss(css) {
 
 /**
  * Splits a plugin's candidates by whether core's own CSS already has them.
- * A class core ships keeps the plugin's copy below core's utilities, so it can
- * never reorder core's rules. Any other class has no rule in core to fight,
- * so it goes in core's utilities layer and overrides the way it would in one
- * Tailwind build.
+ * A plain class core ships keeps the plugin's copy below core's utilities, so
+ * it can never reorder core's rules. Everything else goes in core's utilities
+ * layer: plugin-only classes, and every variant (md:, hover:, ...) even when
+ * core ships it, so `max-h-56 md:max-h-none` is ordered in one build and a
+ * variant still beats core's own base class.
  */
 export function splitByCoreClasses(candidates, coreClasses) {
   const shared = [];
   const own = [];
   for (const candidate of candidates) {
-    (coreClasses.has(candidate) ? shared : own).push(candidate);
+    const plain = !candidate.includes(":");
+    (plain && coreClasses.has(candidate) ? shared : own).push(candidate);
   }
   return { shared, own };
 }

scripts/plugin-build.test.ts

@@ -142,6 +142,18 @@ describe("plugin CSS layers", () => {
     ).toEqual({ shared: ["w-28", "hidden"], own: ["md:w-44"] });
   });
 
+  it("keeps variants core ships with the plugin's own classes", () => {
+    expect(
+      splitByCoreClasses(
+        ["max-h-56", "md:max-h-none", "flex-col", "md:flex-row"],
+        new Set(["md:max-h-none", "flex-col", "md:flex-row"]),
+      ),
+    ).toEqual({
+      shared: ["flex-col"],
+      own: ["max-h-56", "md:max-h-none", "md:flex-row"],
+    });
+  });
+
   it("keeps classes core ships below core and the plugin's own beside core's", async () => {
     vi.spyOn(console, "log").mockImplementation(() => {});
     // Core's class list comes from scanning this repo, this file included,