feat(ops): deadman switch, model health check, issue filter

Closes #115: bin/deadman-switch.sh -- alerts Telegram when zero commits for 2+ hours
Closes #116: bin/model-health-check.sh -- validates model tags against provider APIs
Closes #117: bin/issue-filter.json + live loop patches -- excludes DO-NOT-CLOSE, EPIC, META, RETRO, INTEL, MORNING REPORT, Rockachopa-assigned issues from agent pickup

All three tested locally:
- deadman-switch correctly detected 14h gap and would alert
- model-health-check parses config.yaml and validates (skips gracefully without API key in env)
- issue filters patched into live claude-loop.sh and gemini-loop.sh

bin/deadman-switch.sh

@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+# deadman-switch.sh — Alert when agent loops produce zero commits for 2+ hours
+# Checks Gitea for recent commits. Sends Telegram alert if threshold exceeded.
+# Designed to run as a cron job every 30 minutes.
+
+set -euo pipefail
+
+THRESHOLD_HOURS="${1:-2}"
+THRESHOLD_SECS=$((THRESHOLD_HOURS * 3600))
+LOG_DIR="$HOME/.hermes/logs"
+LOG_FILE="$LOG_DIR/deadman.log"
+GITEA_URL="http://143.198.27.163:3000"
+GITEA_TOKEN=$(cat "$HOME/.hermes/gitea_token_vps" 2>/dev/null || echo "")
+TELEGRAM_TOKEN=$(cat "$HOME/.config/telegram/special_bot" 2>/dev/null || echo "")
+TELEGRAM_CHAT="-1003664764329"
+
+REPOS=(
+  "Timmy_Foundation/timmy-config"
+  "Timmy_Foundation/the-nexus"
+)
+
+mkdir -p "$LOG_DIR"
+
+log() {
+  echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*" >> "$LOG_FILE"
+}
+
+now=$(date +%s)
+latest_commit_time=0
+
+for repo in "${REPOS[@]}"; do
+  # Get most recent commit timestamp
+  response=$(curl -sf --max-time 10 \
+    -H "Authorization: token ${GITEA_TOKEN}" \
+    "${GITEA_URL}/api/v1/repos/${repo}/commits?limit=1" 2>/dev/null || echo "[]")
+
+  commit_date=$(echo "$response" | python3 -c "
+import json, sys, datetime
+try:
+    commits = json.load(sys.stdin)
+    if commits:
+        ts = commits[0]['created']
+        dt = datetime.datetime.fromisoformat(ts.replace('Z', '+00:00'))
+        print(int(dt.timestamp()))
+    else:
+        print(0)
+except:
+    print(0)
+" 2>/dev/null || echo "0")
+
+  if [ "$commit_date" -gt "$latest_commit_time" ]; then
+    latest_commit_time=$commit_date
+  fi
+done
+
+gap=$((now - latest_commit_time))
+gap_hours=$((gap / 3600))
+gap_mins=$(((gap % 3600) / 60))
+
+if [ "$latest_commit_time" -eq 0 ]; then
+  log "WARN: Could not fetch any commit timestamps. API may be down."
+  exit 0
+fi
+
+if [ "$gap" -gt "$THRESHOLD_SECS" ]; then
+  msg="DEADMAN ALERT: No commits in ${gap_hours}h${gap_mins}m across all repos. Loops may be dead. Last commit: $(date -r "$latest_commit_time" '+%Y-%m-%d %H:%M' 2>/dev/null || echo 'unknown')"
+  log "ALERT: $msg"
+
+  # Send Telegram alert
+  if [ -n "$TELEGRAM_TOKEN" ]; then
+    curl -sf --max-time 10 -X POST \
+      "https://api.telegram.org/bot${TELEGRAM_TOKEN}/sendMessage" \
+      -d "chat_id=${TELEGRAM_CHAT}" \
+      -d "text=${msg}" >/dev/null 2>&1 || true
+  fi
+else
+  log "OK: Last commit ${gap_hours}h${gap_mins}m ago (threshold: ${THRESHOLD_HOURS}h)"
+fi

bin/issue-filter.json

@@ -0,0 +1,19 @@
+{
+  "skip_title_patterns": [
+    "[DO NOT CLOSE",
+    "[EPIC]",
+    "[META]",
+    "[GOVERNING]",
+    "[PERMANENT]",
+    "[MORNING REPORT]",
+    "[RETRO]",
+    "[INTEL]",
+    "[SHOWCASE]",
+    "[PHILOSOPHY]",
+    "Master Escalation"
+  ],
+  "skip_assignees": [
+    "Rockachopa"
+  ],
+  "comment": "Shared filter config for agent loops. Loaded by claude-loop.sh and gemini-loop.sh at issue selection time."
+}

bin/model-health-check.sh

@@ -0,0 +1,125 @@
+#!/usr/bin/env bash
+# model-health-check.sh — Validate all configured model tags before loop startup
+# Reads config.yaml, extracts model tags, tests each against its provider API.
+# Exit 1 if primary model is dead. Warnings for auxiliary models.
+
+set -euo pipefail
+
+CONFIG="${HERMES_HOME:-$HOME/.hermes}/config.yaml"
+LOG_DIR="$HOME/.hermes/logs"
+LOG_FILE="$LOG_DIR/model-health.log"
+
+mkdir -p "$LOG_DIR"
+
+log() {
+  echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*" | tee -a "$LOG_FILE"
+}
+
+PASS=0
+FAIL=0
+WARN=0
+
+check_anthropic_model() {
+  local model="$1"
+  local label="$2"
+  local api_key="${ANTHROPIC_API_KEY:-}"
+
+  if [ -z "$api_key" ]; then
+    # Try loading from .env
+    api_key=$(grep '^ANTHROPIC_API_KEY=' "${HERMES_HOME:-$HOME/.hermes}/.env" 2>/dev/null | head -1 | cut -d= -f2- | tr -d "'\"" || echo "")
+  fi
+
+  if [ -z "$api_key" ]; then
+    log "SKIP [$label] $model -- no ANTHROPIC_API_KEY"
+    return 0
+  fi
+
+  response=$(curl -sf --max-time 10 -X POST \
+    "https://api.anthropic.com/v1/messages" \
+    -H "x-api-key: ${api_key}" \
+    -H "anthropic-version: 2023-06-01" \
+    -H "content-type: application/json" \
+    -d "{\"model\":\"${model}\",\"max_tokens\":1,\"messages\":[{\"role\":\"user\",\"content\":\"hi\"}]}" 2>&1 || echo "ERROR")
+
+  if echo "$response" | grep -q '"not_found_error"'; then
+    log "FAIL [$label] $model -- model not found (404)"
+    return 1
+  elif echo "$response" | grep -q '"rate_limit_error"\|"overloaded_error"'; then
+    log "PASS [$label] $model -- rate limited but model exists"
+    return 0
+  elif echo "$response" | grep -q '"content"'; then
+    log "PASS [$label] $model -- healthy"
+    return 0
+  elif echo "$response" | grep -q 'ERROR'; then
+    log "WARN [$label] $model -- could not reach API"
+    return 2
+  else
+    log "PASS [$label] $model -- responded (non-404)"
+    return 0
+  fi
+}
+
+# Extract models from config
+log "=== Model Health Check ==="
+
+# Primary model
+primary=$(python3 -c "
+import yaml
+with open('$CONFIG') as f:
+    c = yaml.safe_load(f)
+m = c.get('model', {})
+if isinstance(m, dict):
+    print(m.get('default', ''))
+else:
+    print(m or '')
+" 2>/dev/null || echo "")
+
+provider=$(python3 -c "
+import yaml
+with open('$CONFIG') as f:
+    c = yaml.safe_load(f)
+m = c.get('model', {})
+if isinstance(m, dict):
+    print(m.get('provider', ''))
+else:
+    print('')
+" 2>/dev/null || echo "")
+
+if [ -n "$primary" ] && [ "$provider" = "anthropic" ]; then
+  if check_anthropic_model "$primary" "PRIMARY"; then
+    PASS=$((PASS + 1))
+  else
+    rc=$?
+    if [ "$rc" -eq 1 ]; then
+      FAIL=$((FAIL + 1))
+      log "CRITICAL: Primary model $primary is DEAD. Loops will fail."
+      log "Known good alternatives: claude-opus-4.6, claude-haiku-4-5-20251001"
+    else
+      WARN=$((WARN + 1))
+    fi
+  fi
+elif [ -n "$primary" ]; then
+  log "SKIP [PRIMARY] $primary -- non-anthropic provider ($provider), no validator yet"
+fi
+
+# Cron model check (haiku)
+CRON_MODEL="claude-haiku-4-5-20251001"
+if check_anthropic_model "$CRON_MODEL" "CRON"; then
+  PASS=$((PASS + 1))
+else
+  rc=$?
+  if [ "$rc" -eq 1 ]; then
+    FAIL=$((FAIL + 1))
+  else
+    WARN=$((WARN + 1))
+  fi
+fi
+
+log "=== Results: PASS=$PASS FAIL=$FAIL WARN=$WARN ==="
+
+if [ "$FAIL" -gt 0 ]; then
+  log "BLOCKING: $FAIL model(s) are dead. Fix config before starting loops."
+  exit 1
+fi
+
+exit 0