From da0b70bc8deae47b8858d5c461b70d437dd05f58 Mon Sep 17 00:00:00 2001
From: Chris Tate <chris@ctate.dev>
Date: Tue, 20 Oct 2026 18:10:27 -0500
Subject: [PATCH] Leave an Error's code to the generic store, and allow test
 units to include scr_js.h

The generic store keeps a native Error's code slot in step with writes
through its checked view, as it does for name, message, stack and cause,
so the store cache leaves `code` to it. The header invariant accepts
scr_js_*.test.c units, which link the dynamic tier.
---
 packages/runtime/src/scr_js_object.c  | 5 +++--
 packages/runtime/test/headers.test.ts | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/packages/runtime/src/scr_js_object.c b/packages/runtime/src/scr_js_object.c
index 87f3024a0..187fba736 100644
--- a/packages/runtime/src/scr_js_object.c
+++ b/packages/runtime/src/scr_js_object.c
@@ -252,10 +252,11 @@ ScrDyn *scr_js_load_probe(ScrDyn *receiver, const ScrStr *key, ScrJsIc *ic) {
 /* ── stores ───────────────────────────────────────────────────────────── */
 
 /* The generic store keeps a native Error's fields in sync with these keys
- * of its checked view; caches leave them to it. */
+ * of its checked view (scr_json.c's scr_error_sync_slots); caches leave
+ * them to it. */
 static bool scr_js_error_synced_key(const ScrStr *key) {
   switch (key->len) {
-  case 4: return memcmp(key->data, "name", 4) == 0;
+  case 4: return memcmp(key->data, "name", 4) == 0 || memcmp(key->data, "code", 4) == 0;
   case 5: return memcmp(key->data, "cause", 5) == 0 || memcmp(key->data, "stack", 5) == 0;
   case 7: return memcmp(key->data, "message", 7) == 0;
   default: return false;
diff --git a/packages/runtime/test/headers.test.ts b/packages/runtime/test/headers.test.ts
index fc6ea737e..42da08364 100644
--- a/packages/runtime/test/headers.test.ts
+++ b/packages/runtime/test/headers.test.ts
@@ -74,6 +74,6 @@ test("only dynamic-tier units include scr_js.h", () => {
   const includers = readdirSync(srcDir)
     .filter((name) => /\.(c|h)$/.test(name))
     .filter((name) => /^#include "scr_js\.h"/m.test(readFileSync(join(srcDir, name), "utf8")));
-  expect(includers.filter((name) => !/^scr_js_\w+\.c$/.test(name))).toEqual([]);
+  expect(includers.filter((name) => !/^scr_js_\w+(\.test)?\.c$/.test(name))).toEqual([]);
   expect(includers).toContain("scr_js_value.c");
 });