One register, enforced by a gate; closed work compressed into siblings (R-376..R-378)

Records and process only. No machine contacted.

ONE REGISTER (operator ruling). 17 roadmap rows moved into OPEN-ITEMS.md keeping their
identifiers, evidence and original filing dates - the oldest R-10, filed 2026-07-15, 38 days.
15 ideas stay in ROADMAP.md, which is their home; the gate exempts them by their own state
word. 59 already-closed rows stay as history. Sorting rule recorded in the roadmap header:
does the item assert something about the shipped product a reader could check and find false?

scripts/one_register_gate.py, wired as the 11th gate. Control run: baseline passes, a planted
open roadmap-only row is convicted by name, removing it passes with the file byte-identical,
and a planted `idea` row is correctly exempt. Its four residual holes are in its docstring.

The gate earned its keep immediately: it caught R-103, a READY finding my hand-sort mis-read as
done because my regex matched the whole row where the body contains "shipped" - the gate matches
the state cell. It also caught R-203 and R-163, recorded closed in the register and still open in
the roadmap; the roadmap copies are marked SUPERSEDED with the register's verdict.

HOUSEKEEPING. OPEN-ITEMS 672,376 -> 327,109 bytes (-51%); ROADMAP 239,306 -> 78,110 (-67%).
Closed work compressed to 17% into CLOSED-ITEMS.md and ROADMAP-HISTORY.md; every entry names the
commit whose git show returns the full original text. Rule-sentences are kept verbatim under
"Reasoning kept" rather than judged entry by entry - 25 carry one.

CONTEXT.md deliberately NOT compressed and the disagreement is argued in the report: 86% of it is
standing rulings still in force, this prompt's own 3.4 says the log is never edited, and it has no
per-ruling delimiter. Filed as R-377 - the problem is navigational, not volumetric.

The hot/bulk placement decision was NEVER recorded as a decision anywhere - established, not
assumed. Now marked [DESIGN] with a pointer honest about having no original date, given a
decision-log entry that records what was rejected, and the [DESIGN]/[FACT] legend carried from 1
of 8 architecture documents to 8 of 8. Existing statements deliberately left unmarked (R-376).

PROMPT-TEMPLATE gains N.7: compress what you closed, rehome live reasoning before it goes, state
the register's size before and after.

Ceiling R-375 -> R-378.

scripts/repo_gates.py

@@ -89,6 +89,10 @@ GATES = [
     ("hub-copy",        os.path.join(SCRIPTS, "hub_copy_gate.py"),        [],      True),
     # R-341 — dated checks in the register were prose that nothing read. Fast: stdlib file read.
     ("due-checks",      os.path.join(SCRIPTS, "due_checks_gate.py"),      [],      True),
+    # R-369 — two files held open work and only one called itself the source of truth, so a READY
+    # 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),
 ]
 
 VERDICT = {0: "OK", 1: "FAILED", 2: "INCONCLUSIVE"}