#188: the Jacquard selector's 64 cards, L7 permanently on, L2 a real gate

Captain Bob, 2026-11-12: "Wire L2, keep L7 on". The table held the 128
cards of the 7-bit L1-L7 space; nothing read L7, and the rolling window
recorded whatever the card said, so the 128 were 32 behaviours.

- compudynamics.c: cd_tuning_word() sizes the table to 64 (L1-L6).
- ssm_jacquard.c: card_bits() makes a card's 7-bit mask, L7 set, where a
  card is read, seeded and started (C4: 17 -> card 8);
  ssm_l8_force_config() still takes the 7-bit index, its L7 bit implied.
- physics_execution_hooks.c, kernel vm_core.c: the rolling window records
  only while L2 is on (or before there is a config).
- ssm_jacquard.h says what is wired, bit by bit (it said L7 was);
  v3/CLAUDE.md and the L8 reference corrected in place; FABRIC-3 XLVIII.21.

Tests first, seen to fail against HEAD (logs/20261112-210510/kernel-tests):
test_ssm_jacquard 4 of 7, test_physics_l2 1 of 4; all pass now. v4 reads
no rolling window: acceptance is unchanged; the protocol runs next.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017RzZgrf7V7Zk2iczBXDRbm

v3/src/physics_execution_hooks.c

@@ -94,8 +94,13 @@ void physics_pre_execute(VM* vm, DictEntry* word, DictEntry* prev)
     uint32_t word_id = word->word_id;
     if (word_id >= DICTIONARY_SIZE) return;
 
-    /* Loop #2: Rolling Window of Truth */
-    rolling_window_record_execution(&vm->rolling_window, word_id);
+    /* Loop #2: Rolling Window of Truth -- L8's live toggle, as L4 below (#188: it recorded
+     * whatever the card said, so the selector's L2 bit did nothing). No config yet: recorded. */
+    {
+        const ssm_config_t *ssm_cfg = (const ssm_config_t*)vm->ssm_config;
+        if (!ssm_cfg || ssm_cfg->L2_rolling_window)
+            rolling_window_record_execution(&vm->rolling_window, word_id);
+    }
 
     /* Loop #4: Pipelining Transition Metrics. ENABLE_PIPELINING is the
      * compile-time ceiling; ssm_config's L4_pipelining is L8's live