re: the seven chatter fields, read off sub_82213980

The one function referencing all seven field-name strings is the rule table's
loader.  Interval / IntervalFluctuation / EffectiveTime are SECONDS, emitted
as *60 frame counts; Probability is a percentage and zero skips the record;
Pattern is a 4-arm enum of which only Sound and Window ship; the Yes/No pair
element is a u32 bitmask, which is why MessageCount is clamped to 32 (max on
disc is 26).  40-byte object layout recorded.  13 dead records characterised.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PMRJjbxLqZtsb5Vb7KunPE

tools/re-capture/preset_messages.py

@@ -118,6 +118,43 @@ def main():
     print('MessageCount*2 == positional count: %d/%d  (mismatches %d)' % (ok, ok + bad, bad))
     print('second-of-pair values             : %s' % dict(flags))
 
+    # value census of the seven named fields, against sub_82213980's reader
+    FIELDS = ['EffectiveTime', 'Interval', 'IntervalFluctuation', 'Priority',
+              'Probability', 'Pattern', 'MessageCount']
+    vals = {f: collections.Counter() for f in FIELDS}
+    cross = collections.Counter()
+    yes_bits = collections.Counter()
+    over32 = 0
+    for recs in rule.values():
+        for r in recs:
+            if r['squadron'] == 'Sperkers':
+                continue
+            d = U.named(r)
+            for f in FIELDS:
+                vals[f][d.get(f)] += 1
+            n, pr = int(d['MessageCount']), int(d['Probability'])
+            cross[(n == 0, pr == 0)] += 1
+            if n > 32:
+                over32 += 1
+            pos = [v for _, nm, v in r['fields'] if nm is None]
+            yes_bits[sum(1 for i, v in enumerate(pos) if i % 2 and v == 'Yes')] += 1
+    print()
+    print('value census of the seven named fields (all %d event records):' % sum(vals['Priority'].values()))
+    for f in FIELDS:
+        v = vals[f]
+        try:
+            order = sorted(v, key=lambda x: int(x))
+        except (TypeError, ValueError):
+            order = sorted(v, key=str)
+        print('  %-20s %2d distinct  %s' % (
+            f, len(v), ' '.join('%s=%d' % (k, v[k]) for k in order)))
+    print('  (MessageCount==0, Probability==0) cross-tab: %s' % {
+        'both zero': cross[(True, True)], 'both set': cross[(False, False)],
+        'no lines but Probability>0': cross[(True, False)],
+        'lines but Probability==0 (dead)': cross[(False, True)]})
+    print('  records with MessageCount > 32 (the reader clamps here): %d' % over32)
+    print('  Yes-bits per record: %s' % dict(sorted(yes_bits.items())))
+
     print()
     print('the 64 event records, and how many of the %d tables give each one lines:' % len(rule))
     for name in sorted(n for n in shape if n != 'Sperkers'):