Worked on improving session routing reliability for the openclaw/openclaw repository, focusing on Feishu integration. Addressed a routing issue by refining how session targets with oc_ identifiers are classified, ensuring that explicit dm: and group: prefixes are properly recognized and that ambiguous targets default to direct routing. This backend fix, implemented using TypeScript and JavaScript, enhanced session isolation and reduced cross-tenant routing errors in Feishu-based workflows. The work involved API integration and careful adjustment of routing logic, resulting in more accurate and reliable workflow execution for production environments without introducing new features during the development period.