In OpenClaw 5.3+, plugins' register() function is called multiple times per conversation, which creates separate closures for each call. This causes module-level variables (like currentSessionId) to not be shared across instances.

Impact on @mem0/openclaw-mem0 plugin (v1.0.11):

1. Agent memory isolation broken: user_id not concatenated with :agent:<agent_id> suffix
2. run_id missing: Always None, can't filter memories by session
3. autoCapture broken: Memories not auto-saved after conversations

Root cause: When before_prompt_build hook sets currentSessionId in Instance A, the memory_add tool reads from Instance B — always undefined.

Our fix: We added a module-level _globalSessionIdMap to share state across instances. Patch repo: https://github.com/wanmeime/openclaw-mem0-fix

Suggestion: Perhaps the plugin architecture could provide a shared state mechanism or ensure register() is only called once per session?

Thanks!