chore(devx): respell the parseSymbolRef placeholder and retire the last held allowance row

The one-line docblock on `scripts/check-adr-0087-registration.mjs#parseSymbolRef`
wrote its placeholder path-shaped, so the scripts/** symbol-anchor corpus read the
illustration as an anchor into a file this tree does not have. It now uses the
angle-bracket grammar `scripts/symbol-anchors.mjs#ANCHOR_GRAMMAR` already teaches.
One line, no behaviour change.

With the citation gone the last `HELD_FILE_ALLOWANCES` row has done its job and is
deleted; the export and its doc stay, and the array is now empty. Four of the
self-test's cases are registered per allowance row, so the pinned floor drops 30 to
26 by exactly that mechanism, with the reason written beside the literal. The
allowance battery does not go vacuous: its five fixture cases run off the
`scripts/bad.mjs` fixture row, not off the live array.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012zGPuVVX3deAx9LdjK8jCk

Author: claude

scripts/check-adr-0087-registration.mjs

@@ -2003,7 +2003,7 @@ const IDENT = '[A-Za-z_$][A-Za-z0-9_$]*';
 const MEMBER_PATH_RE = new RegExp(`^${IDENT}(?:\\.${IDENT})*$`);
 
 /**
- * `path/to/file.ts#Symbol` or `path/to/file.ts#a.b.member` -> its halves, or null.
+ * `<dir>/<file>.ts#<Symbol>` or `<dir>/<file>.ts#<a>.<b>.<member>` -> its halves, or null.
  *
  * ⚠️ The grammar was widened to a dotted member path (#15627), and the widening is
  * only sound because the READER was widened in the same commit. `packages/client/

scripts/check-scripts-symbol-anchors.mjs

@@ -145,17 +145,12 @@ export const CENSUS_15765 = {
  * The only admissible reason is the hot-file serial queue.
  */
 export const HELD_FILE_ALLOWANCES = Object.freeze([
-  Object.freeze({
-    file: 'scripts/check-adr-0087-registration.mjs',
-    dated: '2026-09-05',
-    heldBy: 'PR #15724 (#15627)',
-    why: 'A one-line docblock on `scripts/check-adr-0087-registration.mjs#parseSymbolRef` writes its '
-      + 'placeholder path-shaped, so a resolver reads the illustration as an anchor into a file this '
-      + 'tree does not have. The repair is the angle-bracket spelling `<dir>/<file>.ts#<Symbol>` that '
-      + '`scripts/symbol-anchors.mjs#ANCHOR_GRAMMAR` already uses, and it is one line — but the file '
-      + 'is held by a governed draft awaiting a human merge, and a comment-only edit landing under a '
-      + 'reviewed governed PR is exactly the conflict this queue exists to prevent.',
-  }),
+  // EMPTY, and empty is the healthy state: every row written so far has been
+  // retired by repairing the citation it held. The mechanism above is not dead
+  // code — `triage()` still takes rows, and the self-test still exercises it in
+  // BOTH directions against its OWN fixture row (`scripts/bad.mjs`), including
+  // the leg that proves a row is load-bearing rather than decorative. So an
+  // empty live array leaves that battery running, not vacuous.
 ]);
 
 export const CORPUS = defineCorpus({
@@ -244,10 +239,14 @@ function assert(cond, msg) { if (!cond) { console.error(`❌ check-scripts-symbo
 // exactness loop below runs four `check()`s over each row), so retiring a row
 // legitimately lowers this floor by 4 — and that is the ONLY reason it may be
 // lowered. 34 → 30 when the `scripts/check-react-page-adapter-contract.mjs`
-// row was retired (#15765). Any other drop is cases that STOPPED RUNNING; find what
-// stopped registering instead of moving the number.
+// row was retired, then 30 → 26 when the `scripts/check-adr-0087-registration.mjs`
+// row was retired and the array went EMPTY (#15765). Any other drop is cases that
+// STOPPED RUNNING; find what stopped registering instead of moving the number.
+// ⚠️ An empty array does NOT make the allowance battery vacuous: its five
+// fixture cases run off `scripts/bad.mjs`, never off the live rows, so they are
+// not part of this arithmetic and must never fall out of the count.
 const SELF_TEST_BATTERIES = Object.freeze({
-  'check-scripts-symbol-anchors self-test': 30,
+  'check-scripts-symbol-anchors self-test': 26,
 });
 
 // DELETING an entry silences that battery's floor exactly as effectively as