diff --git a/NEXT.md b/NEXT.md
index d22790f..da43f24 100644
--- a/NEXT.md
+++ b/NEXT.md
@@ -346,6 +346,30 @@ callable), no cycle detection, and a package cannot import another one.
 
 ## sand.flan is two programs
 
+**The stated reason below is narrower than it reads, and the real fix is a
+one-line change to `Load` rather than two files.** Two claims got run together:
+
+- *raylib does not work on wasm* — false. It works through emscripten, which
+  plan.org says itself. What is true is that it does not work on the **wasi**
+  path, which is what the headless table targets, and which has no GL and no
+  browser.
+- *a game loop cannot be expressed on wasm* — false. The browser cannot be
+  blocked, so a web build drives the loop with `emscripten_set_main_loop`
+  instead of a `while`. That is a different `main`, not a different program,
+  and nothing about it requires the simulation to live in its own package.
+
+What actually justifies the split is smaller and stands on its own: **the
+headless test needs no window and no input on any target.** `sand.flan` could
+not be that test even natively — with no mouse the grid stays empty and
+`settle` and `move-grain` never run on real data.
+
+What makes the split *mandatory* rather than chosen is the packaging
+limitation: **`Load` collects a package's C sources and link flags whether or
+not anything references the package.** Make that conditional and the two files
+become a preference. That is the thing to fix, and it is not large.
+
+
+
 plan.org wants sand tested twice — interactive at 120 fps, and headless over N
 frames with the grid hashed, the version CI runs on native *and* wasm32. Those
 cannot be one binary: `Load` collects a package's C sources and linker