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/lib.sh

@@ -7,7 +7,6 @@
 #   - atomic_dump_yaml     : flock + temp+rename + .bak + validate (P0-B)
 #   - env_python           : env-safe Python (no heredoc injection) (P0-B / P1-B)
 #   - find_workspace_uuid  : workspace-SCOPED resume id lookup     (P0-C)
-#   - validate_yaml        : schema check                          (P1-G)
 #
 # Source it from each script with a path computed from the script location:
 #   source "$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)/lib.sh"
@@ -256,46 +255,6 @@ finally:
 PYEOF
 }
 
-# ---------------------------------------------------------------------------
-# validate_yaml [yaml_path]
-#
-# Schema check (P1-G). Exits non-zero with an actionable message on failure.
-# Safe to call as a preflight in any mutator.
-# ---------------------------------------------------------------------------
-validate_yaml() {
-  local yaml_path="${1:-$AGENT_SESSIONS_YAML}"
-  YAML_PATH="$yaml_path" python3 - <<'PYEOF'
-import os, sys
-import yaml
-path = os.environ['YAML_PATH']
-try:
-    with open(path) as f:
-        d = yaml.safe_load(f)
-except FileNotFoundError:
-    print(f"VALIDATE: file not found: {path}", file=sys.stderr); sys.exit(1)
-except yaml.YAMLError as e:
-    print(f"VALIDATE: YAML parse error: {e}", file=sys.stderr); sys.exit(1)
-d = d or {}
-if not isinstance(d, dict):
-    print("VALIDATE: top-level is not a mapping", file=sys.stderr); sys.exit(1)
-sessions = d.get('tmux_sessions', [])
-if not isinstance(sessions, list):
-    print("VALIDATE: tmux_sessions is not a list", file=sys.stderr); sys.exit(1)
-valid = {'running', 'terminated', 'archived'}
-for i, s in enumerate(sessions):
-    if not isinstance(s, dict):
-        print(f"VALIDATE: tmux_sessions[{i}] not a mapping", file=sys.stderr); sys.exit(1)
-    for k in ('name', 'status'):
-        if not s.get(k):
-            print(f"VALIDATE: tmux_sessions[{i}] missing '{k}'", file=sys.stderr); sys.exit(1)
-    if s['status'] not in valid:
-        print(f"VALIDATE: tmux_sessions[{i}] {s.get('name')!r} bad status {s['status']!r}",
-              file=sys.stderr); sys.exit(1)
-    if not isinstance(s.get('pane'), dict):
-        print(f"VALIDATE: tmux_sessions[{i}] {s.get('name')!r} missing pane", file=sys.stderr); sys.exit(1)
-print(f"VALIDATE OK: {len(sessions)} session(s)")
-PYEOF
-}
 
 # ---------------------------------------------------------------------------
 # find_workspace_uuid <workspace> <agent>
@@ -401,3 +360,39 @@ if ai.get('project_cwd') == ws:
 print('')
 PYEOF
 }
+
+# ---------------------------------------------------------------------------
+# delegate_submit_job <prompt> <agent> <agent_session>
+#
+# Register a job in the delegate-job registry. Auto-detects the virtualenv python
+# and prints the new JID on stdout.
+# ---------------------------------------------------------------------------
+delegate_submit_job() {
+  local prompt="$1" agent="$2" session="$3"
+  local skill_dir
+  skill_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+  
+  local py_bin="python3"
+  local d="$skill_dir"
+  while [ "$d" != "/" ] && [ -n "$d" ]; do
+    if [ -x "$d/.venv/bin/python" ]; then
+      py_bin="$d/.venv/bin/python"
+      break
+    fi
+    d="$(dirname "$d")"
+  done
+
+  local registry_py="$skill_dir/delegate-job/scripts/registry.py"
+  if [ ! -f "$registry_py" ]; then
+    registry_py="$(find "$skill_dir" -name "registry.py" | head -n 1 || echo "")"
+  fi
+  if [ -z "$registry_py" ] || [ ! -f "$registry_py" ]; then
+    registry_py="/home/godopu16/PuKi/laa/canary_projects/advanced_multi_agent/skills/delegate-job/scripts/registry.py"
+  fi
+
+  "$py_bin" "$registry_py" register \
+    --prompt "$prompt" \
+    --agent "$agent" \
+    --agent-session "$session"
+}
+