refactor(skills): cleanup dead code + full workflow A→B→C→D integration

Cleanup:
- Remove unused validate_yaml() helper from lib.sh
- Remove USER_MANUAL.html + mqtt-broker-setup.html (no refs found)

Workflow A (create_session ↔ delegate-job):
- Add --submit-job <prompt> option to create_session.sh
- Auto-register session in delegate-job registry, store delegate_job_id in YAML

Workflow B (push-based monitor):
- Migrate reconcile.sh to MQTT subscriber mode (polling fallback preserved)

Workflow C (unified status):
- status.sh now shows session + delegate-job state in single column

Workflow D (audit log + perms):
- JSON job files chmod 600
- create/delete/resume now publish lifecycle events to delegate-job

skills/multi-agent-create/scripts/create_session.sh

@@ -32,6 +32,7 @@ Options:
   --wrapper           force use of ~/.local/bin/<session> wrapper even if not present
   --dry-run           print commands without executing
   --tmux-server NAME  specify isolated tmux server name
+  --submit-job PROMPT submit a job to delegate-job registry with the given prompt
   -h, --help          this help
 EOF
 }
@@ -42,6 +43,7 @@ SESSION_NAME=""
 USE_WRAPPER=0
 DRY_RUN=0
 TMUX_SERVER_OPT=""
+SUBMIT_JOB_PROMPT=""
 
 while [ $# -gt 0 ]; do
   case "$1" in
@@ -51,6 +53,7 @@ while [ $# -gt 0 ]; do
     --wrapper)   USE_WRAPPER=1; shift ;;
     --dry-run)   DRY_RUN=1; shift ;;
     --tmux-server) TMUX_SERVER_OPT="$2"; shift 2 ;;
+    --submit-job) SUBMIT_JOB_PROMPT="$2"; shift 2 ;;
     -h|--help)   usage; exit 0 ;;
     *) echo "ERROR: unknown arg: $1" >&2; usage; exit 2 ;;
   esac
@@ -154,6 +157,19 @@ case "$AGENT" in
 esac
 
 # agent-sessions.yaml 에 append
+DELEGATE_JOB_ID=""
+if [ -n "$SUBMIT_JOB_PROMPT" ]; then
+  delegate_agent=""
+  if [ "$AGENT" = "claude" ]; then
+    delegate_agent="claude-code"
+  else
+    delegate_agent="antigravity-cli"
+  fi
+  agent_session="tmux:$SESSION_NAME"
+  DELEGATE_JOB_ID=$(delegate_submit_job "$SUBMIT_JOB_PROMPT" "$delegate_agent" "$agent_session")
+  echo "Submitted delegated job: $DELEGATE_JOB_ID"
+fi
+
 if [ ! -f "$AGENT_SESSIONS_YAML" ]; then
   echo "ERROR: $AGENT_SESSIONS_YAML not found. Run init first." >&2
   exit 4
@@ -172,7 +188,8 @@ atomic_dump_yaml "$AGENT_SESSIONS_YAML" \
   SESSION_NAME="$SESSION_NAME" AGENT="$AGENT" NOW_ISO="$NOW_ISO" \
   TMUX_EPOCH="$TMUX_EPOCH" PANE_PID="$PANE_PID" PANE_CWD="$PANE_CWD" \
   CMD_FULL="$CMD_FULL" START_CMD="$START_CMD" CHILD_PID="$CHILD_PID" \
-  TMUX_SERVER_NAME="${TMUX_SERVER_NAME:-default}" <<'PYEOF'
+  TMUX_SERVER_NAME="${TMUX_SERVER_NAME:-default}" \
+  DELEGATE_JOB_ID="$DELEGATE_JOB_ID" <<'PYEOF'
 name = os.environ['SESSION_NAME']
 agent = os.environ['AGENT']
 pid = os.environ.get('PANE_PID', '')
@@ -196,6 +213,7 @@ entry = {
     'tmux_session_created_at': os.environ['NOW_ISO'],
     'tmux_session_epoch': int(epoch) if epoch.isdigit() else 0,
     'tmux_server': server_name,
+    'delegate_job_id': os.environ.get('DELEGATE_JOB_ID', '') or None,
     'pane': {
         'index': 0,
         'pid': int(pid) if pid.isdigit() else 0,
@@ -242,6 +260,20 @@ PYEOF
 echo
 echo "=== created ==="
 echo "tmux session: $SESSION_NAME (pane pid $PANE_PID, cmd $PANE_CMD, cwd $PANE_CWD)"
+if [ -n "$DELEGATE_JOB_ID" ]; then
+  echo "delegate job: $DELEGATE_JOB_ID"
+  py_bin="python3"
+  d_dir="$(dirname "${BASH_SOURCE[0]}")"
+  while [ "$d_dir" != "/" ] && [ -n "$d_dir" ]; do
+    if [ -x "$d_dir/.venv/bin/python" ]; then
+      py_bin="$d_dir/.venv/bin/python"
+      break
+    fi
+    d_dir="$(dirname "$d_dir")"
+  done
+  pub_script="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)/delegate-job/scripts/publish_event.py"
+  "$py_bin" "$pub_script" --job "$DELEGATE_JOB_ID" --event started --detail "canary session created" || true
+fi
 echo "agent-sessions.yaml updated"
 echo
 if [ -n "${TMUX_SERVER_NAME:-}" ] && [ "$TMUX_SERVER_NAME" != "default" ]; then