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-rw-r--r--packages/meshbay-common/src/meshbay_common/handshake.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/packages/meshbay-common/src/meshbay_common/handshake.py b/packages/meshbay-common/src/meshbay_common/handshake.py
index 992fe8a..c3d5b94 100644
--- a/packages/meshbay-common/src/meshbay_common/handshake.py
+++ b/packages/meshbay-common/src/meshbay_common/handshake.py
@@ -89,6 +89,8 @@ CHALLENGE_PREFIX = b"meshbay:mnp:challenge:v1"
# hub session token (MNP_VERSION note). A pre-4.0 peer presents the session
# token, which this node now refuses — so the floor moves to 4.0 rather than
# leaving a branch that would keep a hub credential reachable by every node.
+# 5.0 (2026-09-28) does not move it: the break is confined to four signed
+# operations, which a peer across it refuses to sign (MNP_VERSION note).
MNP_MIN_SUPPORTED = "4.0"
ROLE_CLIENT = "client"