feat(lib): implement A-4 M0~M1 BaseAgentAdapter pattern and resolve_home contract

.agents/skills/multi-agent-mux-monitor/scripts/reconcile.sh

@@ -320,7 +320,7 @@ import os, json, glob, subprocess, time, sqlite3
 from datetime import datetime, timezone
 import yaml
 
-exec(os.environ['MAM_VERIFY_PY'])
+from lib_py.verify_session import verify_session_uuid, workspace_key
 
 yaml_path = os.environ['YAML_PATH']
 home = os.environ['HOME_DIR']
@@ -344,14 +344,18 @@ if not lib_sh:
 try:
     d
 except NameError:
-    import subprocess
-    d = {}
     try:
-        script = f"source '{lib_sh}' && load_state_json"
-        out = subprocess.check_output(['bash', '-c', script], stderr=subprocess.DEVNULL)
-        d = json.loads(out.decode('utf-8'))
+        from lib_py.state import load_state_json
+        d = load_state_json(yaml_path)
     except Exception:
-        pass
+        import subprocess
+        d = {}
+        try:
+            script = f"source '{lib_sh}' && load_state_json"
+            out = subprocess.check_output(['bash', '-c', script], stderr=subprocess.DEVNULL)
+            d = json.loads(out.decode('utf-8'))
+        except Exception:
+            pass
 
 # Any herdr_session_epoch at or below this is not a real session time.
 # 1000000000 = 2001-09-09; it is below every plausible MAM session and far
@@ -859,7 +863,7 @@ if not actions:
 PYEOF
 
 if [ "$DRY_RUN" = "1" ]; then
-  printf '%s' "$RECON_SRC" | LIB_SH="$LIB_SH" MAM_VERIFY_PY="$VERIFY_SESSION_PYTHON" env_python "$AGENT_SESSIONS_YAML"
+  printf '%s' "$RECON_SRC" | LIB_SH="$LIB_SH" env_python "$AGENT_SESSIONS_YAML"
 else
-  printf '%s' "$RECON_SRC" | LIB_SH="$LIB_SH" MAM_VERIFY_PY="$VERIFY_SESSION_PYTHON" atomic_dump_yaml "$AGENT_SESSIONS_YAML"
+  printf '%s' "$RECON_SRC" | LIB_SH="$LIB_SH" atomic_dump_yaml "$AGENT_SESSIONS_YAML"
 fi