gate: tablet 52 — the fringe quoted couplings as sentences on the first real reply

checks.grounding.ungrounded holds coupling strings ("coupled(claim(1),
not_in_sources)"), not sentences; the fringe called Access.get/3 on a
string and the first real reply from Claude through /gate/anthropic
answered 500 CHATAT_UNEXPECTED (after recording its bedikah). The
sentence is now looked up by claim index in the check's claims; a test
produces an ungrounded claim. Broken Tablets tablet 52. Elixir 593/0.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

specs/broken_tablets/README.md

@@ -54,3 +54,21 @@ interpretations still ground in L1 alone.
 
 The first tablets are in the git history before `tablet 49`. The
 difference between the two is the correction.
+
+## Tablet 52 — the first real reply through the gate (2026-10-13)
+
+The gate (bishe'arecha §I) passed every test — fourteen of them, with a
+local model double and examination doubles — and crashed on the first
+real reply from Claude. The fringe quotes the sentence each rule fired
+on; for the grounding rules it read `checks.grounding.ungrounded`, which
+holds coupling strings (`coupled(claim(1), not_in_sources)`), not
+sentences. No double had ever produced an ungrounded claim, so the path
+through `Access.get/3` on a string was never taken. The shape was in the
+Tamid contract all along ("ungrounded": [...]); the builder wrote the
+reader from memory of what it should hold.
+
+Fixed: the claim's sentence is looked up by index in the check's
+`claims`; a test now produces an ungrounded claim. The lesson is the one
+from Day 6 and tablets 41 and 50 again, one layer out: a double shaped
+by the builder tests the builder's picture of the wire. The first real
+message is the test. Run it before calling the gate built.