# Verification and correctness (across cycles)

## Verification and correctness (across cycles)

1. **Snapshot tests** for the pretty-printer and IR emit. The diff makes
   regressions visible immediately.
2. **Property tests** for the JSON ↔ pretty-print
   [roundtrip](roundtrip-invariant.md).
3. **End-to-end tests** for `examples/` with expected program output.
4. **Hash stability**: a test ensures the same def always produces the same
   hash.
5. **CI pin** of the outputs in `tests/expected/`.
6. **Rustdoc cleanliness**: `cargo doc --no-deps` runs warning-free.
   Fixing a rustdoc warning is part of the iteration that
   introduced it, not a follow-up.

Ratified by: `bench/architect_sweeps.sh`.