refactor: rename metadata directory .hermes to .mam in backplane scripts and documents

.agents/skills/tmux-agent-orchestrate-stop/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: tmux-agent-orchestrate-stop
-description: "Stop an agent tmux session (claude, antigravity/agy) and update .hermes/agent-sessions.yaml. Default stops gracefully and marks status=stopped with conversation preserved for resume. Does NOT delete on-disk conversation artifacts (jsonl/db) — those are preserved unless --purge-conversation is passed. Use when ending a work session, switching to a different one, or cleaning up before a fresh start."
+description: "Stop an agent tmux session (claude, antigravity/agy) and update .mam/agent-sessions.yaml. Default stops gracefully and marks status=stopped with conversation preserved for resume. Does NOT delete on-disk conversation artifacts (jsonl/db) — those are preserved unless --purge-conversation is passed. Use when ending a work session, switching to a different one, or cleaning up before a fresh start."
 version: 1.0.0
 author: godopu
 license: MIT
@@ -17,7 +17,7 @@ metadata:
 
 > **Companion skills**: `tmux-agent-orchestrate-create` (start), `tmux-agent-orchestrate-resume` (re-attach), `tmux-agent-orchestrate-monitor` (live status).
 > **Tmux Isolation**: `stop` 명령은 YAML의 `tmux_server` 필드를 자동으로 파싱하여 해당 격리 서버의 세션을 안전하게 종료(kill)하므로, `TMUX_SERVER_NAME` 환경변수를 수동으로 지정할 필요가 없습니다.
-> **Single source of truth**: `./.hermes/agent-sessions.yaml`.
+> **Single source of truth**: `./.mam/agent-sessions.yaml`.
 
 ## What this skill does
 
@@ -37,7 +37,7 @@ The stop command is always **graceful by default**:
 
 ```bash
 SESSION_NAME=<workspace>-creator-<agent>  # convention
-AGENT_SESSIONS_YAML=.hermes/agent-sessions.yaml
+AGENT_SESSIONS_YAML=.mam/agent-sessions.yaml
 
 # 1) Session is registered?
 python3 -c "

.agents/skills/tmux-agent-orchestrate-stop/scripts/stop_session.sh

@@ -286,11 +286,11 @@ if purge and purge_uuid:
             print(f"purged: {brain}", flush=True)
         target['agy_conversation_id_own'] = None
     elif agent == 'hermes':
-        json_file = f"{home}/.hermes/sessions/session_{purge_uuid}.json"
+        json_file = f"{home}/.mam/sessions/session_{purge_uuid}.json"
         if os.path.exists(json_file):
             os.remove(json_file)
             print(f"purged: {json_file}", flush=True)
-        hdb = f"{home}/.hermes/state.db"
+        hdb = f"{home}/.mam/state.db"
         if os.path.exists(hdb):
             try:
                 import sqlite3