docs(plans): DEFERRED, Node 24 test dir form

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/plans/DEFERRED.md

@@ -212,6 +212,13 @@ at every gate. Started 2026-09-12 during the control board MVP.
   live groups skip. Rocko hit it during the S2 suites. Wrap the block in
   the same guard as the other live groups, so a seat without provider
   access gets clean skips. (2026-10-04, #1519)
+- **`node --test <dir>/` fails on Node 24.** Node 24 reads a directory
+  argument as a module, so every package's test command in that form
+  fails there, while Node 26 accepts it. The glob form
+  (`node --test 'packages/x/tests/*.test.mjs'`) works on both. Package
+  READMEs, `docs/TOOLS.md` and Sage's suite recipe should use the glob
+  form wherever Node 24 is a target. Darkwing, S1 packet. (2026-10-04,
+  #1518)
 
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