R-885: script-tests gate runs every scripts/**/test_*.py on every push (decoys, red-proofs); closed (336 -> 335)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

scripts/test_gate_decoys.py

@@ -52,6 +52,9 @@ COVERS = {
                         "(2026-10-03) an old-shape row under the new header, a near-miss category, an "
                         "old rank tag as Sev, an undefined state word, and a pipe outside backticks"),
     "decoy-coverage":  "a gate registered in a runner with no decoy and no exemption (its red-proof)",
+    "script-tests":    ("R-885: FIVE cases in scripts/test_script_tests_gate.py, run from here: a suite that PRINTS "
+                        "OK and exits 1 (label without fact), a failing suite three levels deep (scope is a walk), "
+                        "an empty scripts/ tree (checked nothing), the genuine article (must pass), the nested mark"),
     "guide-quote":     ("R-596: SEVEN cases in scripts/test_guide_quote_gate.py, run from here so "
                         "this suite stays the single entry point. The load-bearing one is "
                         "name-for-fact: a guide that lists every key in a table and quotes none of "
@@ -353,6 +356,19 @@ else:
     _n = _gq.stdout.strip().splitlines()[-1] if _gq.stdout.strip() else "?"
     print("  ok  %-20s %s" % ("guide-quote", _n))
 
+# ── script-tests (R-885) ─────────────────────────────────────────────────────────────────────────
+#
+# Its decoys are whole fake repos, so they live in their own file and are RUN from here (guide-quote's shape).
+ran += 1
+_st = subprocess.run([sys.executable, os.path.join("scripts", "test_script_tests_gate.py")],
+                     cwd=ROOT, capture_output=True, text=True)
+if _st.returncode != 0:
+    fails.append("script-tests: its decoy suite FAILED — a decoy did not convict\n%s"
+                 % (_st.stdout + _st.stderr)[-800:])
+else:
+    _n = _st.stdout.strip().splitlines()[-1] if _st.stdout.strip() else "?"
+    print("  ok  %-20s %s" % ("script-tests", _n))
+
 # ── register-shape (R-627) ───────────────────────────────────────────────────────────────────────
 #
 # THE DECOYS ARE THE REAL DAMAGE, not invented shapes. On 2026-09-21 an append regex ate two rows'