Reference

• CLI — every flag, the forwarding rule
• Markers — serial, flaky, xdist_group
• Environment variables — the RSTEST_* contract
• Exit codes
• Report JSON — --report-json, discovery, streaming & doctor schemas
• Benchmarks
• Parity divergences & upstream fixes — every reason a public suite isn't byte-exact, and the upstream change that removes it
• Troubleshooting
• License