diff --git a/docs/plans/release-0.3.15.md b/docs/plans/release-0.3.15.md
index 4d76f396f..ade0ffa54 100644
--- a/docs/plans/release-0.3.15.md
+++ b/docs/plans/release-0.3.15.md
@@ -91,6 +91,12 @@ The digest readings were on a throwaway node with no peers; the node lane's comp
 
 The fix (node lane): the signal stamp and the signal read gated on publish 2's object (both v4 fields set); a template on the thirteen-field file has header version 2, on the sixteen-field file 1026; the digest tests unchanged; the harness with the new node mining. Then the node rebuilds (Linux, Windows cross, Mac), the digests are re-read, the canary runs again. The app tree needs nothing.
 
+## 6d. The second canary FAIL (20:36Z): the receive side
+
+On 7961c5f1 (the stamp gated), two boxes with clean datadirs got "wrong block version: got 1026 but expected 2" from both hands within three minutes: a version-1026 block from the poisoned boxes' branch reached them via relay through pool-1 (a 7961c5f1 node poisoned by p1-a5000), the new node ACCEPTED and RELAYED it, the 0.3.14 nodes rejected the relay and disconnected the sender. One poisoned peer poisons every new node it touches. The fix (node lane): the header-version RULE gated like the stamp (window or floor absent: version 2 only, 1026 rejected with 0.3.14's line, no relay; publish 2's object: both accepted); unit tests both ways; the compat harness with a poisoned peer. The retry form adds the poisoned peer relaying into the new node. Fleet: pool-1 and the three retry boxes held on 6615571c for the next cut; the 0.3.14 poisoned boxes (p1-3080, p2-3090-1, p1-a5000) wiped and fresh-joined from the hub.
+
+Lesson for every node cut: the compat gate needs the receive side as well as the mining side: a peer feeding the new node the headers the rule must refuse, with the old node watching the new node's relays.
+
 ## 6b. Publish 1 as staged (the downloads folder, local until the line)
 
 - Manifest 0.3.15, Mac row only (Igneum-Miner-0.3.15.dmg 90bdf8c8, 41,961,932), the thirteen-field object, signed; a Windows box reads "no file for this platform" and waits. Site rows: Mac 0.3.15, HiveOS 0.3.15 (1715e58e), Windows carried on 0.3.14 (publish-public.sh keeps a platform's previous file when the manifest lacks it: packaging/ota/aliases.py), wallet 0.1.4.