kb-concurrent-safelisted

Check: 1. `KNOWLEDGE_AGENT_ID` is set or choose a stable one for this session. 2. The agent is working in its own git branch or worktree. 3. `.knowledge/maintenance/concurrency_policy.json` exists. 4. `.knowledge/tools/lib/json-store.js` exists. 5. Shared `.knowledge` writes are done through maintenance tools. 6. Existing watcher/hook state does not indicate stale or conflicting processes. Recommended command: ```bash KNOWLEDGE_AGENT_ID=<agent-name> node .knowledge/tools/sync-tracked.js ``` If unsafe, explain which condition failed and how to proceed safely.