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

.agents/skills/lib.sh

@@ -16,7 +16,7 @@
 
 SKILL_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 WORKSPACE_ROOT="$(cd "$SKILL_DIR/../.." && pwd)"
-AGENT_SESSIONS_YAML="${AGENT_SESSIONS_YAML:-$WORKSPACE_ROOT/.hermes/agent-sessions.yaml}"
+AGENT_SESSIONS_YAML="${AGENT_SESSIONS_YAML:-$WORKSPACE_ROOT/.mam/agent-sessions.yaml}"
 
 # Workspace-relative defaults with environment overrides (Phase Z)
 HOME_DIR="${HOME_DIR:-$WORKSPACE_ROOT}"
@@ -439,7 +439,7 @@ def db_exists(uuid):
 
 
 def hermes_exists(uuid):
-    hdb = f"{home}/.hermes/state.db"
+    hdb = f"{home}/.mam/state.db"
     if not os.path.exists(hdb):
         return False
     try:
@@ -529,7 +529,7 @@ elif agent == 'agy':
         if cand and db_exists(cand):
             emit(cand)
 elif agent == 'hermes':
-    hdb = f"{home}/.hermes/state.db"
+    hdb = f"{home}/.mam/state.db"
     if os.path.exists(hdb):
         cand = None
         try:
@@ -724,7 +724,7 @@ start_watchdog() {
   local job_id="$1"
   local workdir="${2:-$PWD}"
   local watchdog_script="$workdir/.agents/skills/tmux-agent-orchestrate-monitor/scripts/watchdog.sh"
-  local log_file="$workdir/.hermes/jobs/${job_id}.watchdog.log"
+  local log_file="$workdir/.mam/jobs/${job_id}.watchdog.log"
   
   if [ ! -x "$watchdog_script" ]; then
     echo "ERROR: watchdog not found or not executable: $watchdog_script" >&2