Common pitfalls

Updated May 29, 2026
  • Loading two language skills in one turn. Pick the one whose decision surface dominates and keep the other in reserve.
  • Reaching for a deep dive without first reading python-verification. The selector cuts most "which tool?" questions in seconds.
  • Treating mutation testing as a build gate. The survivor list is a worklist; CI should publish the trend, not fail the build.
  • Profiling without a baseline. Pyinstrument is most useful as a before-and-after comparison.