R-87 put back in the register; closed_register_gate.py is the 12th gate (R-405, R-406)

Records and process only. No machine contacted. No product code, no version bump,
no build, no deploy.

R-87 was moved into CLOSED-ITEMS.md by the 2026-08-22 compression sweep ef6ac6f while
its own state cell read "READY - RE-RANKED UP 2026-08-03 (R-86 closed)". R-378 records
that sweep moving six still-open rows and restoring them in the same session; this was
a seventh it missed. Nine days in the wrong file, with the register's ranking paragraph
ranking it fourth and pointing at nothing. Restored verbatim from ef6ac6f^, beside R-95
where it sat before.

The predicate is the LEADING VERDICT of the state cell, which is R-378's lesson and
decides the answer here. Measured on the file as pushed: an open word anywhere in the
state cell convicts 3 of 151 rows, two of them genuinely closed (R-224 and R-260 carry
"open"/"OPEN" inside long prose verdicts); the leading verdict convicts exactly 1; the
whole row convicts 144.

closed_register_gate.py, two rules: no open state word leading a CLOSED-ITEMS.md row's
verdict, and no R- id with a row in both registers. Red-proofed both, and negative-
controlled against the pushed pre-fix files where it convicts R-87 by name, rc=1;
restoring the planted rows leaves the file byte-identical. Registered as the 12th gate
in repo_gates.py, --fast, after it was green. Four residual holes in its docstring.

R-398 was also in both registers - a deliberate cross-reference stub. Now prose beneath
the table rather than a table row, because a row in both files is what rule 2 convicts on.

R-406 filed: two unrelated findings in OPEN-ITEMS.md both numbered R-133. The only such
collision in either register. Deliberately NOT gated - a within-register duplicate rule
would fail on a pre-existing row, and a registered-but-failing gate refuses every push.

golden-currency is RED at this commit and was already red at dddcc80 - controller
v0.230.0 released, newest golden 0.229.0. Pre-existing, not this session's debt.

Ceiling R-404 -> R-406.

scripts/repo_gates.py

@@ -106,6 +106,11 @@ GATES = [
     # finding sat in ROADMAP.md for 25 days invisible to every "grep the register" rule and was
     # rediscovered by an overnight drill. Fast: two file reads.
     ("one-register",    os.path.join(SCRIPTS, "one_register_gate.py"),    [],      True),
+    # R-405 — the 2026-08-22 compression sweep moved R-87 into CLOSED-ITEMS.md while its own state
+    # cell read READY; R-378 caught six siblings in the same session and missed this one, so it sat
+    # in the wrong file for nine days while the ranking paragraph pointed at nothing. Fast: two
+    # file reads.
+    ("closed-register", os.path.join(SCRIPTS, "closed_register_gate.py"), [],      True),
     # R-389 — a live finding lived in a REPORT.md observations paragraph and nowhere else, and
     # REPORT.md is overwritten every session. Fast: stdlib file reads.
     ("observations",    os.path.join(SCRIPTS, "observations_gate.py"),    [ROOT],  True),