plan: note the live serving-JIT iteration gotcha (Slice 2)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

plans/relations-as-posts.md

@@ -52,6 +52,12 @@ the relation's object-end declaration from the anchor**, which includes the root
   EMPTY (the load trigger fills each) — only the relate/unrelate FRAGMENT server-renders
   candidates (`with-cands` flag), so one page render doesn't do `candidate-get × every
   picker`. Benign single-perform suspend/resume still logs `VmSuspended` but returns 200.
+- **Live JIT gotcha (cost real time):** the serving-mode JIT drops all-but-first when
+  `map`/`for-each`-ing a *function-produced* list — building `rel-kinds` that way rendered
+  only 1 of 4 editors live, while conformance + the ephemeral server passed. So
+  `host/blog-rel-kinds` is a VALUE the boot populates and the cache loads are UNROLLED.
+  **Conformance green ≠ correct live — verify the rendered edit page.** (Re-fold the
+  enumeration once plans/jit-bytecode-correctness.md lands.)
 - **Follow-up (Slice 2.5):** `relate-candidates` does a `host/blog-get` per pool member
   (O(posts) for `related`). A boot-time **title cache** (updated on put!/delete!) would make
   the picker O(1)-perform and cut the suspend/resume churn. Subject-end declarations + a