feat(multi-agent-mux): integrate cline agent support, fix sqlite3 naming collision, simplify delegation docs, and add SKILL_FEATURES.md

.agents/skills/multi-agent-mux-stop/scripts/stop_session.sh

@@ -76,6 +76,7 @@ if [ -z "$AGENT" ]; then
     *-creator-claude) AGENT=claude ;;
     *-creator-agy)    AGENT=agy ;;
     *-creator-hermes) AGENT=hermes ;;
+    *-creator-cline)  AGENT=cline ;;
     *) echo "ERROR: cannot infer agent from '$SESSION_NAME'; pass --agent" >&2; exit 2 ;;
   esac
 fi
@@ -184,6 +185,7 @@ graceful_stop() {
     claude) exitkey="/exit" ;;
     agy)    exitkey="Exit" ;;
     hermes) exitkey="/exit" ;;
+    cline)  exitkey="/exit" ;;
     *)      exitkey="/exit" ;;
   esac
   echo "graceful: send-keys '$exitkey' to $SESSION_NAME"
@@ -263,6 +265,8 @@ if captured and not purge:
         target['agy_conversation_id_own'] = captured
     elif agent == 'hermes':
         target['hermes_conversation_id_own'] = captured
+    elif agent == 'cline':
+        target['cline_conversation_id_own'] = captured
     target['resumable'] = True
 
 # --purge-conversation: 워크스페이스 격리된 UUID 의 디스크 artifact 만 삭제 (P0-C)
@@ -294,15 +298,21 @@ if purge and purge_uuid:
         if os.path.exists(hdb):
             try:
                 import sqlite3
-                conn = sqlite3.connect(hdb)
-                conn.execute("DELETE FROM sessions WHERE id=?", (purge_uuid,))
-                conn.execute("DELETE FROM messages WHERE session_id=?", (purge_uuid,))
-                conn.commit()
-                conn.close()
+                hconn = sqlite3.connect(hdb)
+                hconn.execute("DELETE FROM sessions WHERE id=?", (purge_uuid,))
+                hconn.execute("DELETE FROM messages WHERE session_id=?", (purge_uuid,))
+                hconn.commit()
+                hconn.close()
                 print(f"purged db records for session: {purge_uuid}", flush=True)
             except Exception as e:
                 print(f"WARN: purge hermes db records failed: {e}", flush=True)
         target['hermes_conversation_id_own'] = None
+    elif agent == 'cline':
+        sessions_dir = f"{home}/.cline/data/sessions/{purge_uuid}"
+        if os.path.isdir(sessions_dir):
+            shutil.rmtree(sessions_dir)
+            print(f"purged: {sessions_dir}", flush=True)
+        target['cline_conversation_id_own'] = None
     # agent_identities 는 cache — 이 워크스페이스 것일 때만 비운다
     ai = (d.get('agent_identities') or {}).get(agent) or {}
     if ai.get('project_cwd') == ws:
@@ -317,6 +327,8 @@ if purge and purge_uuid:
             ai['conversation_brain_dir'] = None
         elif agent == 'hermes' and ai.get('session_id') == purge_uuid:
             ai['session_id'] = None
+        elif agent == 'cline' and ai.get('session_id') == purge_uuid:
+            ai['session_id'] = None
 elif purge and not purge_uuid:
     print("WARN: --purge-conversation requested but no workspace-scoped UUID resolved; nothing purged", flush=True)