fix: feat: action-agent — tmux + Claude + formula for operational tasks (#139)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

action/action-poll.sh

@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+# action-poll.sh — Cron scheduler: find open 'action' issues, spawn action-agent
+#
+# An issue is ready for action if:
+#   - It is open and labeled 'action'
+#   - No tmux session named action-{issue_num} is already active
+#
+# Usage:
+#   cron every 10min
+#   action-poll.sh [projects/foo.toml]   # optional project config
+
+set -euo pipefail
+
+export PROJECT_TOML="${1:-}"
+source "$(dirname "$0")/../lib/env.sh"
+
+LOGFILE="${FACTORY_ROOT}/action/action-poll-${PROJECT_NAME:-harb}.log"
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+log() {
+  printf '[%s] poll: %s\n' "$(date -u '+%Y-%m-%d %H:%M:%S UTC')" "$*" >> "$LOGFILE"
+}
+
+# --- Memory guard ---
+AVAIL_MB=$(awk '/MemAvailable/{printf "%d", $2/1024}' /proc/meminfo)
+if [ "$AVAIL_MB" -lt 2000 ]; then
+  log "SKIP: only ${AVAIL_MB}MB available (need 2000MB)"
+  matrix_send "action" "⚠️ Low memory (${AVAIL_MB}MB) — skipping action-poll" 2>/dev/null || true
+  exit 0
+fi
+
+# --- Find open 'action' issues ---
+log "scanning for open action issues"
+ACTION_ISSUES=$(curl -sf -H "Authorization: token ${CODEBERG_TOKEN}" \
+  "${CODEBERG_API}/issues?state=open&labels=action&limit=50&type=issues") || true
+
+if [ -z "$ACTION_ISSUES" ] || [ "$ACTION_ISSUES" = "null" ]; then
+  log "no action issues found"
+  exit 0
+fi
+
+COUNT=$(printf '%s' "$ACTION_ISSUES" | jq 'length')
+if [ "$COUNT" -eq 0 ]; then
+  log "no action issues found"
+  exit 0
+fi
+
+log "found ${COUNT} open action issue(s)"
+
+# Spawn action-agent for each issue that has no active tmux session.
+# Only one agent is spawned per poll to avoid memory pressure; the next
+# poll picks up remaining issues.
+for i in $(seq 0 $((COUNT - 1))); do
+  ISSUE_NUM=$(printf '%s' "$ACTION_ISSUES" | jq -r ".[$i].number")
+  SESSION="action-${ISSUE_NUM}"
+
+  if tmux has-session -t "$SESSION" 2>/dev/null; then
+    log "issue #${ISSUE_NUM}: session ${SESSION} already active, skipping"
+    continue
+  fi
+
+  LOCKFILE="/tmp/action-agent-${ISSUE_NUM}.lock"
+  if [ -f "$LOCKFILE" ]; then
+    LOCK_PID=$(cat "$LOCKFILE" 2>/dev/null || echo "")
+    if [ -n "$LOCK_PID" ] && kill -0 "$LOCK_PID" 2>/dev/null; then
+      log "issue #${ISSUE_NUM}: agent starting (PID ${LOCK_PID}), skipping"
+      continue
+    fi
+  fi
+
+  log "spawning action-agent for issue #${ISSUE_NUM}"
+  nohup "${SCRIPT_DIR}/action-agent.sh" "$ISSUE_NUM" >> "$LOGFILE" 2>&1 &
+  log "started action-agent PID $! for issue #${ISSUE_NUM}"
+  break
+done