Nothing to try yetTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Cross-Session MessagingArea: what it touches
In DevelopmentKind: in v2.1.227,
In DevelopmentSection of the release
Cross-session messaging sits behind CLAUDE_CODE_HARBOR_KITE or a remote flag, off by default and never on Windows.
What
Cross-session messaging, which lets one Claude Code session send messages to another, stays off unless the tengu_harbor_kite remote flag (which falls back to off) or the CLAUDE_CODE_HARBOR_KITE environment variable is set, and it is never available on Windows. When it is off, inbound messages from other sessions are now refused as a kill switch rather than a generic refusal.
Details
The log says the message was refused because cross-session messaging is disabled, and telemetry records the cause as kill_switch instead of refused.
Messages already held for delivery are dropped with "gate off — dropped N parked peer message(s)" and receipted as expired rather than denied.
Evidence
cross-session messaging disabled (kill switch)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
tengu_harbor_kiteOff by default, switched on for this account
The shipped code defaults this off, and the flag server returned on for the one account this site reads on this version. That is the reading that makes the entry above worth a second look, and it still says nothing about your account.
This account: on · anonymous baseline: on · compiled default in v2.1.227: off
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
Flag reading movedThe flag server now returns on for tengu_harbor_kite, read as this account.A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading movedThe flag server now returns off for tengu_harbor_kite, read as this account.A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading movedThe flag server now returns on for tengu_harbor_kite, read as this account.A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading movedThe flag server now returns nothing at all, having stopped carrying it for tengu_harbor_kite, read as this account.A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
