fix(opencode): Mac review of the Linux fixes - a clean db has no sidecars on Mac either, the placeholder needs its example, a home install must run, status and reconcile read the db read-only (Issue #60, PR #62)

- tests: macOS SQLite keeps -wal/-shm after the last close (persistent WAL);
  the `clean` state removes them after the checkpointing close
- the 2.x placeholder pattern requires the quoted example, so a typed
  `Ask anything…` is read as a draft
- auth_ok takes ~/.opencode/bin/opencode only as an executable file
- status.sh and reconcile.sh (drift C) open opencode.db with _ro_connect

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff

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

@@ -950,7 +950,9 @@ for s in d.get('herdr_sessions', []):
 
     valid_candidates = []
     try:
-        conn = sqlite3.connect(odb)
+        # read-only: nothing is created or removed beside the agent's db (Issue #60)
+        from lib_py.agents.adapters.opencode import _ro_connect
+        conn = _ro_connect(odb)
         cursor = conn.cursor()
         # opencode 2.x keeps sessions in session_v2 (a migrated 1.x `session`
         # table is no longer written).