diff --git a/docs/testing.md b/docs/testing.md
index f76b024..643a307 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -6,6 +6,24 @@ binding the results to that image's digest; a `skipped` suite blocks admission
 exactly like a failure. See [`gotchas.md`](gotchas.md) for the traps that live
 in the harness rather than in Stream.
 
+## Three receipt names that are not the command name
+
+A receipt records twenty suites. Seventeen are named exactly like the `just`
+target that runs them, so a red entry tells you what to re-run. Three do not,
+and `scripts/admit` is the authority on the mapping:
+
+| suite in the receipt | how to run it |
+|---|---|
+| `lifecycle-oracle` | `just oracle` |
+| `unit-debug` | `zig build test` |
+| `unit-releasesafe` | `zig build test -Doptimize=ReleaseSafe` |
+
+So the everyday `zig build test` below is two of the twenty admission suites,
+and the unit tests are graded in both build modes — `ReleaseSafe` differs from
+`Debug` in more than speed, since release-mode safety checks and different
+undefined-behaviour handling can hide or expose a bug that the other mode does
+not. There is no `just lifecycle-oracle`; searching for one finds nothing.
+
 ## Everyday
 
 ```