Run RustPython tests in Apple's `container` CLI Linux environment. Use when user asks to run or compare Linux test results on macOS.
Investigate a failing RustPython test, compare with CPython behavior, and decide whether to implement a fix or prepare incompatibility issue details.
Pick the next CPython stdlib module ready for upgrade based on update_lib todo output and skip modules with open upgrade PRs.
Upgrade a Python standard library module from CPython into RustPython using scripts/update_lib and then triage and mark remaining failures.
Implement missing RustPython C-API functions in crates/capi using the pyo3-ffi header split mapping (`pyo3-ffi/src/*.rs`, mirroring CPython C API headers). Use this whenever the user asks to add or port C-API functions (for example from setobject.h, dictobject.h, unicodeobject.h) or add capi tests.