From 9c6d24f8e324f3902af494765cda7a74c15c843c Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 19 Sep 2026 14:33:44 +0000
Subject: [PATCH] fix(i18n): catch keys read through a copyFor() key list
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Every theme's copy.ts batches its SlotCopy through a local copyFor(t,
keys) helper that calls t.t(key) in a loop. Because the key reaches the
translator through a variable, not a string literal, i18n-check's CALL
regex never saw it, so a key listed there with no matching catalog entry
passed silently — the exact shape of the "raw key leaks in the UI" report,
even though every current copyFor() list in the repo does resolve.

Scan the array literal passed to copyFor(t, [...]) directly and fail the
same way the existing literal-call check does.
---
 scripts/i18n-check.mjs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/scripts/i18n-check.mjs b/scripts/i18n-check.mjs
index ba63a133a..c357b434a 100644
--- a/scripts/i18n-check.mjs
+++ b/scripts/i18n-check.mjs
@@ -162,6 +162,7 @@ const source = files.filter(
 const CALL = /(?:\.\s*(?:t|has)|\bmsg)\(\s*'([\w.-]+)'/g
 const CARRIED = /\b(?:title|blurb|label|description|message|publicMessage)Key:\s*'([\w.-]+)'/g
 const KEY_SHAPE = /^[a-z][\w-]*(?:\.[\w-]+)+$/
+const KEY_LIST = /\w+\(\s*t\s*,\s*\[([\s\S]*?)\]\s*\)/g
 
 for (const { abs, rel } of source) {
   const text = await readFile(abs, 'utf8')
@@ -183,6 +184,22 @@ for (const { abs, rel } of source) {
       )
     }
   }
+
+  for (const listMatch of text.matchAll(KEY_LIST)) {
+    for (const litMatch of listMatch[1].matchAll(new RegExp(STRING, 'g'))) {
+      const key = litMatch[0].slice(1, -1)
+      if (!KEY_SHAPE.test(key)) continue
+
+      used.add(key)
+      if (allMessages[key] === undefined) {
+        fail(
+          `${rel} reads the message "${key}" through a key list passed to a translator ` +
+            'helper, and no English catalog carries it. A missing message renders as its ' +
+            'own key, in every language including English.',
+        )
+      }
+    }
+  }
 }
 
 const orphans = messageKeys.filter((key) => !used.has(key))