Worked on the openclaw/openclaw repository to enhance backend reliability and performance by addressing concurrency issues in local embedding model initialization. Introduced a single-flight initialization mechanism using TypeScript, ensuring that the embedding model and its context are loaded only once, even when multiple concurrent requests occur. This approach prevented duplicate loads and reduced resource contention, directly improving the stability of embedding operations. Focused on backend development and concurrency control, the work emphasized robust engineering discipline and thorough testing practices. Although no new features were added during the period, the targeted bug fix delivered measurable business value by increasing system reliability under load.