1 files changed, 4 insertions, 0 deletions
diff --git a/ONBOARD.md b/ONBOARD.md
index a0ed367..5b05862 100644
--- a/ONBOARD.md
+++ b/ONBOARD.md
@@ -163,6 +163,10 @@ make check
 make test JOBS=4
 ```
 
+`make parity` compiles the programs in `tests/programs/` and `examples/` with zc0 and
+with the self-hosted compiler and diffs their output; `tests/programs/parity_ops.zc`
+pins operator precedence. it uses `build/`, and skips what zc0 rejects.
+
 the suite builds its own map, bootstrap and cores in a scratch directory, so it
 does not depend on what is in `build/`. on a host without the arm64 jit the
 language server is interpreted and slow; `ZC_TEST_TIMEOUT_SCALE` stretches the