diff --git a/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md b/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
index c68f227c..3e24b271 100644
--- a/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
+++ b/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
@@ -311,3 +311,8 @@ names the principle that settles it, and is cited as "design 47 G A-n".
   `delivered`, `pending`, `acted`) lives in one state of its own, `heard`, not in `own-build`, which keeps its one key;
   every key part is escaped as a name (§73), so a dotted module name parses; a kind-3 edge compares its artifact's
   language with `toolchain.<language>`.
+- **A-81** (§588, §369; principle 7) As built in mesh-delivery f12883b2: the publish-again queue key is
+  `<holder>.<module>.<version>`; the holders and their nodes are what the builder hears on `running` (read whole at its
+  start, §556, so a restart rebuilds them); `running` means not stopped, with a fingerprint; a not-stored artifact is
+  remembered on the reservation (`Unstored`); the tool's request rides a reasks mode `republish`; a message the state
+  cannot take is not acknowledged, as the other parts do.