Worked on the tigergraph/ecosys repository to address a critical correctness issue in Cypher delete queries, focusing on ensuring that the "Delete All Nodes by Any Label" operation accurately targets nodes with any label. The solution involved reverting a backward-incompatible change and introducing a wildcard label in the MATCH clause, thereby restoring expected behavior and reducing the risk of unintended data loss. Updated the Cypher.md documentation using Markdown to clearly reflect the revised query semantics and actual system behavior. Demonstrated attention to detail in both code and documentation, with a focus on reliability and alignment between implementation and user guidance.