process: enforce forbidden runtime invariants in monitor (#316)

docs/commands.md

@@ -157,9 +157,12 @@ python -m src.main --mode=paper
 # Run with dashboard enabled
 python -m src.main --mode=paper --dashboard
 
-# Runtime verification monitor (NOT_OBSERVED detection)
+# Runtime verification monitor (coverage + forbidden invariants)
 bash scripts/runtime_verify_monitor.sh
 
+# Runtime monitor with explicit policy timezone (example: KST)
+POLICY_TZ=Asia/Seoul bash scripts/runtime_verify_monitor.sh
+
 # Session handover gate (must pass before implementation)
 python3 scripts/session_handover_check.py --strict
 

docs/workflow.md

@@ -195,6 +195,11 @@ Use `run_in_background=True` for independent tasks that don't block subsequent w
 - `NOT_OBSERVED`는 운영상 `FAIL`과 동일하게 처리
 - `NOT_OBSERVED`가 하나라도 있으면 승인/머지 금지
 
+`FORBIDDEN` 처리 규칙:
+- 정책 위반 신호(예: 주말 `session=KRX_REG`)는 `FORBIDDEN=HIT`으로 별도 기록한다
+- `FORBIDDEN=HIT`은 즉시 `P0 FAIL`로 간주하고 모니터링 승인 불가
+- 실시간 모니터는 `alive`만으로 정상 판정하지 않는다(정책 불변식 통과가 필수)
+
 ### Process-Change-First Rule (Mandatory)
 
 재발 방지/운영 규칙 변경이 결정되면, 기능 구현 티켓보다 먼저 서버(feature branch)에 반영해야 한다.

scripts/runtime_verify_monitor.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Runtime verification monitor with NOT_OBSERVED detection.
+# Runtime verification monitor with coverage + forbidden invariant checks.
 
 set -euo pipefail
 
@@ -7,6 +7,7 @@ ROOT_DIR="${ROOT_DIR:-/home/agentson/repos/The-Ouroboros}"
 LOG_DIR="${LOG_DIR:-$ROOT_DIR/data/overnight}"
 INTERVAL_SEC="${INTERVAL_SEC:-60}"
 MAX_HOURS="${MAX_HOURS:-24}"
+POLICY_TZ="${POLICY_TZ:-Asia/Seoul}"
 
 cd "$ROOT_DIR"
 
@@ -30,7 +31,20 @@ check_signal() {
   return 1
 }
 
-log "[INFO] runtime verify monitor started interval=${INTERVAL_SEC}s max_hours=${MAX_HOURS}"
+check_forbidden() {
+  local name="$1"
+  local pattern="$2"
+  local run_log="$3"
+
+  if rg -q "$pattern" "$run_log"; then
+    log "[FORBIDDEN] ${name}=HIT pattern=${pattern}"
+    return 1
+  fi
+  log "[FORBIDDEN] ${name}=CLEAR pattern=${pattern}"
+  return 0
+}
+
+log "[INFO] runtime verify monitor started interval=${INTERVAL_SEC}s max_hours=${MAX_HOURS} policy_tz=${POLICY_TZ}"
 
 while true; do
   now=$(date +%s)
@@ -73,6 +87,28 @@ while true; do
     log "[OK] coverage complete (NOT_OBSERVED=0)"
   fi
 
+  # Forbidden invariants: must never happen under given policy context.
+  forbidden_hits=0
+  policy_dow="$(TZ="$POLICY_TZ" date +%u)" # 1..7 (Mon..Sun)
+  is_weekend=0
+  if [ "$policy_dow" -ge 6 ]; then
+    is_weekend=1
+  fi
+
+  if [ "$is_weekend" -eq 1 ]; then
+    # Weekend policy: KR regular session loop must never appear.
+    check_forbidden "WEEKEND_KR_SESSION_ACTIVE" \
+      "Market session active: KR|session=KRX_REG|Processing market: Korea Exchange" \
+      "$latest_run" || forbidden_hits=$((forbidden_hits+1))
+  else
+    log "[FORBIDDEN] WEEKEND_KR_SESSION_ACTIVE=SKIP reason=weekday"
+  fi
+
+  if [ "$forbidden_hits" -gt 0 ]; then
+    log "[P0] forbidden_invariant_hits=$forbidden_hits (treat as immediate FAIL)"
+  else
+    log "[OK] forbidden invariants clear"
+  fi
+
   sleep "$INTERVAL_SEC"
 done
-

workflow/session-handover.md

@@ -81,3 +81,11 @@
 - next_ticket: #314
 - process_gate_checked: process_ticket=#306,#308 merged_to_feature_branch=yes
 - risks_or_notes: 백테스트 자동 게이트 도입 티켓 브랜치 strict gate 통과용 엔트리
+
+### 2026-02-28 | session=codex-issue316-forbidden-monitor
+- branch: feature/issue-316-weekend-forbidden-monitor
+- docs_checked: docs/workflow.md, docs/commands.md, docs/agent-constraints.md
+- open_issues_reviewed: #316
+- next_ticket: #316
+- process_gate_checked: process_ticket=#306,#308 merged_to_feature_branch=yes
+- risks_or_notes: 모니터 판정을 liveness 중심에서 policy invariant(FORBIDDEN) 중심으로 전환