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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Reference / Environment variables

CLAUDE_CODE_HARBOR_KITE

A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.224, including the newest one read.

What it is

Messages from another session render as an @sender header with indented body instead of raw tags.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.224.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.224 – 2.1.243 19 releases in the build bool —

A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.

Changelog entries naming it

  1. v2.1.248Kite network transport now defaults on, including on Windows

    The kite network transport is on by default everywhere, and CLAUDE_CODE_HARBOR_KITE=0 now really turns it off.

    named in this entry

  2. v2.1.238Cross-session peer identity is now keyed to the account, still off by default

    Session-to-session messaging identity now follows your account, but the whole feature is off by default.

    named in this entry

  3. v2.1.236Asking another local session to ping you when it goes idle, built end to end but not offered to the model

    Your session already honours idle-ping requests from other sessions; only asking for one is gated off.

    named in this entry

  4. v2.1.232@-mention completion for other Claude sessions

    You could @-mention your other Claude sessions from the prompt box, but the flag is off by default.

    named in this entry

  5. v2.1.232@-mentioning another Claude session

    Typing @name could message another live Claude session; the feature is off by default.

    named in this entry

  6. v2.1.232A /config row for messages from your other sessions

    A settings row for handling messages from your other sessions exists but is hidden here.

    named in this entry

  7. v2.1.232Hidden cross-session inbox row in the settings dialog

    A cross-session inbox row can appear in settings but stays hidden without a server flag.

    named in this entry

  8. v2.1.229Windows now has its own gate for Harbor cross-session messaging

    Setting CLAUDE_CODE_HARBOR_KITE forces cross-session messaging on, and Windows can now be allowed through.

    named in this entry

  9. v2.1.227Refusing peer messages when cross-session messaging is off is now a distinct case

    Sending messages between your Claude sessions stays off, and refusals now name the kill switch explicitly.

    named in this entry

  10. v2.1.224Incoming peer messages get their own transcript rendering

    Messages from another session render as an @sender header with indented body instead of raw tags.

    named in this entry

  11. v2.1.224Peer address shown in the session info panel

    The session info panel now shows your peer socket address when cross-session messaging is on.

    named in this entry

  12. v2.1.224Remote bridge peers documented as reply-only

    Remote bridge sessions are described as reply-only and unreachable by name.

    named in this entry

  13. v2.1.224Cross-session messaging explains why it is unavailable

    Messaging another session now tells you why it failed instead of silently doing nothing.

    named in this entry

  14. v2.1.224Remote Control sessions now explain that they are reply-only

    Messaging a Remote Control session now explains it is reply-only until it messages you first.

    named in this entry

  15. v2.1.224Cross-session messaging inbox now actually starts at startup

    Startup can now actually open the local socket that lets other sessions message you.

    named in this entry

  16. v2.1.224New ListAgents tool for finding other sessions you can message

    A tool that lists other Claude sessions you can message exists but stays off by default.

    named in this entry

  17. v2.1.224SendMessage can address other sessions directly and reports delivery timing

    Messages can be addressed to a specific session by socket or id, blocked unless peer messaging is enabled.

    named in this entry

  18. v2.1.224Forked sessions are told once that their twin is still running

    A forked session can be told once that its twin is still live and how to reach it.

    named in this entry

  19. v2.1.224Forked sessions can be told their original is still running

    A forked session can be told its original is still running and how to message it.

    named in this entry

Documentation pages

None of Anthropic's documentation pages this site has a copy of carries this name.

Names beside it

Every environment variable in the inventory starting claude_code_harbor, up to twelve of them.

CLAUDE_CODE_HARBOR_KITE_CLOUDCLAUDE_CODE_HARBOR_KITE_CLOUD turns on cloud peer access; otherwise a server flag decides and it's off. 2.1.232 CLAUDE_CODE_HARBOR_KITE_PACING_OFFYou can switch off Harbor request pacing with a new environment variable. 2.1.236

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the environment variable does. All environment variables.