Reference

These are the pages you look things up in. You can read them in any order, and each one is a table.

page	contents
Diagnostics	Every E/W/R code the checker, the converter, and the backends emit, and what it means. ppy explain E1301 prints the same text.
Configuration	Every key under [tool.ppy] in pyproject.toml, with its default. A CLI flag overrides it for one invocation.
Performance	Tables generated at build time from the recorded measurements: the collatz kernel and six judge problems.
Compatibility	What is stable and what changes, what the cache and the artifact ABI promise, and the platform and C-library floor.