February 2026 monthly summary: Delivered reliability improvements across two repos by correcting operand handling in symbolic expression conversion and ensuring per-record tab state isolation. In Qiskit/qiskit, fixed ParameterExpression.sympify() for reverse power (RPOW) and added exhaustive tests for RPOW, RDIV, RSUB, along with release notes and docstrings; changes align Python sympify behavior with the Rust replay logic and improve test coverage. In twentyhq/twenty, implemented Tab State Isolation Per Record by including the record ID in tab instance IDs, preventing cross-record tab synchronization while preserving backward compatibility when no record ID is available. Collectively, these changes reduce runtime errors, improve correctness, and enhance user experience. Technologies/skills demonstrated include Python, SymPy, Rust integration considerations, test-driven development, linting, and release-note documentation; collaboration and code quality improvements were also evident.