fix(v0.6.2): A/B volume normalization + memory frontmatter schema

Two issues surfaced by running ADAM's /reflect loop on a large real journal
(4015 entries, 119 sessions) — both caused false/broken auto-apply behavior.

1. A/B over-reported regressions (adam-ab-measure.mjs).
   Regressions were measured on RAW originating-signal counts pre vs post. On a
   busy, growing journal almost every signal count rises post-apply regardless
   of whether the proposal helped — so the loop flagged 9 false "regressions"
   (and would auto-roll-back good proposals). Now the delta is computed on the
   signal's SHARE of total activity (rate = count / window-total). Falls back to
   the raw-count delta when the signal is the only activity in the window
   (preserves prior behavior + all existing A/B tests). Output adds
   raw_delta_pct, pre_total, post_total, normalized for transparency.

2. Memory frontmatter drift (agents/adam.md, SKILL.md).
   The drafting protocol emitted flat `type:`/`originSessionId:` with a prose
   `name`, but the live auto-memory store uses `name` = slug plus a
   `metadata: {node_type, type, originSessionId}` block. Auto-applied memories
   could fail to load/categorize. Protocol + apply-time validation now require
   the live metadata.* schema and cross-checking against an existing file.

Tests: 132 -> 134. New: volume growth (raw +200%) with flat activity-share
classifies neutral, not regressed; a genuine share increase still classifies
regressed.

adam/tests/run-tests.sh

@@ -2014,6 +2014,50 @@ done
 assert_grep    "$ROOT/journal.jsonl" '"type":"retry_loop"' "3x byte-identical reads emit retry_loop"
 assert_no_grep "$ROOT/journal.jsonl" '"type":"file_reread"' "byte-identical reads NOT double-counted as file_reread (sameToolArgs>=RETRY guard)"
 
+# --- Test 112: A/B volume normalization — busier journal does NOT fake a regression ---
+echo "Test 112: A/B volume-normalized (raw +200% but flat share → neutral)"
+reset_state
+applied_at_ms=$(node -e 'console.log(Date.now() - 14*86400000)')
+cat > "$ROOT/ab-tracking.jsonl" <<EOF
+{"applied_at":$applied_at_ms,"proposal_id":"ab-vol-001","proposal_type":"memory","target_skill":"vol","proposal_fingerprint":"fpV","originating_signals":[{"type":"correction","count":2,"session_ids":["sV"]}],"pre_window_days":7}
+EOF
+> "$ROOT/journal.jsonl"
+# pre window: 2 correction + 8 dead_end (rate 0.2)
+for i in 1 2; do ts=$(node -e "console.log(new Date(Date.now()-(15+$i*0.2)*86400000).toISOString())"); echo "{\"ts\":\"$ts\",\"session\":\"sV\",\"type\":\"correction\"}" >> "$ROOT/journal.jsonl"; done
+for i in 1 2 3 4 5 6 7 8; do ts=$(node -e "console.log(new Date(Date.now()-(15+$i*0.1)*86400000).toISOString())"); echo "{\"ts\":\"$ts\",\"session\":\"sV\",\"type\":\"dead_end\"}" >> "$ROOT/journal.jsonl"; done
+# post window: 6 correction + 24 dead_end (rate 0.2 — share unchanged, raw count +200%)
+for i in $(seq 1 6); do ts=$(node -e "console.log(new Date(Date.now()-(8+$i*0.1)*86400000).toISOString())"); echo "{\"ts\":\"$ts\",\"session\":\"sV\",\"type\":\"correction\"}" >> "$ROOT/journal.jsonl"; done
+for i in $(seq 1 24); do ts=$(node -e "console.log(new Date(Date.now()-(8+$i*0.05)*86400000).toISOString())"); echo "{\"ts\":\"$ts\",\"session\":\"sV\",\"type\":\"dead_end\"}" >> "$ROOT/journal.jsonl"; done
+out=$(ABMEASURE_RUN --format json 2>/dev/null)
+if echo "$out" | node -e 'let b="";process.stdin.on("data",d=>b+=d).on("end",()=>{const a=JSON.parse(b);const e=a.find(x=>x.proposal_id==="ab-vol-001");process.exit(e&&e.normalized===true&&e.raw_delta_pct===200&&e.status==="neutral"?0:1)})'; then
+  echo "  PASS: volume growth normalized → neutral (raw +200%)"; PASS=$((PASS+1))
+else
+  echo "  FAIL: volume normalization wrong (got: $out)"; FAIL=$((FAIL+1))
+fi
+rm -f "$ROOT/ab-tracking.jsonl"
+
+# --- Test 113: A/B genuine rate regression still flagged ---
+echo "Test 113: A/B genuine share increase → regressed"
+reset_state
+applied_at_ms=$(node -e 'console.log(Date.now() - 14*86400000)')
+cat > "$ROOT/ab-tracking.jsonl" <<EOF
+{"applied_at":$applied_at_ms,"proposal_id":"ab-vol-002","proposal_type":"memory","target_skill":"vol2","proposal_fingerprint":"fpV2","originating_signals":[{"type":"correction","count":2,"session_ids":["sV2"]}],"pre_window_days":7}
+EOF
+> "$ROOT/journal.jsonl"
+# pre: 2 correction + 8 dead_end (rate 0.2)
+for i in 1 2; do ts=$(node -e "console.log(new Date(Date.now()-(15+$i*0.2)*86400000).toISOString())"); echo "{\"ts\":\"$ts\",\"session\":\"sV2\",\"type\":\"correction\"}" >> "$ROOT/journal.jsonl"; done
+for i in 1 2 3 4 5 6 7 8; do ts=$(node -e "console.log(new Date(Date.now()-(15+$i*0.1)*86400000).toISOString())"); echo "{\"ts\":\"$ts\",\"session\":\"sV2\",\"type\":\"dead_end\"}" >> "$ROOT/journal.jsonl"; done
+# post: 6 correction + 6 dead_end (rate 0.5 — share up → genuine regression)
+for i in $(seq 1 6); do ts=$(node -e "console.log(new Date(Date.now()-(8+$i*0.1)*86400000).toISOString())"); echo "{\"ts\":\"$ts\",\"session\":\"sV2\",\"type\":\"correction\"}" >> "$ROOT/journal.jsonl"; done
+for i in 1 2 3 4 5 6; do ts=$(node -e "console.log(new Date(Date.now()-(8+$i*0.07)*86400000).toISOString())"); echo "{\"ts\":\"$ts\",\"session\":\"sV2\",\"type\":\"dead_end\"}" >> "$ROOT/journal.jsonl"; done
+out=$(ABMEASURE_RUN --format json 2>/dev/null)
+if echo "$out" | node -e 'let b="";process.stdin.on("data",d=>b+=d).on("end",()=>{const a=JSON.parse(b);const e=a.find(x=>x.proposal_id==="ab-vol-002");process.exit(e&&e.normalized===true&&e.status==="regressed"?0:1)})'; then
+  echo "  PASS: genuine share increase → regressed"; PASS=$((PASS+1))
+else
+  echo "  FAIL: genuine regression missed (got: $out)"; FAIL=$((FAIL+1))
+fi
+rm -f "$ROOT/ab-tracking.jsonl"
+
 echo
 echo "Results: $PASS passed, $FAIL failed"
 [ "$FAIL" = "0" ]