KeiSei84
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Thin skill wrapper over the existing kei-message jsonl mailbox so the user (and agents) can talk between Claude Code sessions with @id syntax: /msg read my inbox (to me or "all") /msg @frontend text send to a session (identity = its cwd basename) /msg all text broadcast /msg list | who whole bus / known recipients - kei-message.sh send now accepts a leading @name as the recipient (first token only; a later @x stays literal). --to still works. - skills/msg/SKILL.md documents the identity model (cwd-basename), pull delivery (recipient's next turn via mailbox-inject hook), and the first-contact discovery path (who / all). - README skills count 68 -> 69. Verified: @name/all/--to parsing (3 cases) + end-to-end send/inbox/who via the live script in a sandbox HOME. Skill registered + discoverable. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
3.2 KiB
3.2 KiB
| name | description | argument-hint |
|---|---|---|
| msg | Read or write the cross-session mailbox by @id. Send a message to another Claude Code session (`/msg @name text`), read your own inbox (`/msg` with no args), broadcast to everyone (`/msg all text`), list the whole bus, or discover who is reachable. Thin wrapper over the `kei message` jsonl mailbox — messages land in the recipient's NEXT turn via the mailbox-inject hook (pull, not push). Use whenever the user wants sessions/agents to talk to each other. | [@name] <message> | (empty = read inbox) | list | who |
/msg — Inter-Session Mailbox
A persistent append-only bus so ANY Claude Code session can message ANY other —
not just Agent-Teams teammates, no tmux, no daemon. Backed by
~/.claude/scripts/kei-message.sh writing ~/.claude/mailbox/messages.jsonl.
The mailbox-inject.sh UserPromptSubmit hook pulls each session's unread into
its context once per turn, so delivery is pull (arrives on the recipient's
next turn), not instant push.
Identity model
- Your address = the basename of this session's working directory (
$PWD). So a session running in~/Projects/frontendis reachable as@frontend. allis the broadcast channel — every session seesto:"all"messages.- You can override the sender with
--from <name>and the reader identity with--me <name>if a session's cwd basename isn't the name you want to use.
Command map
Interpret $ARGUMENTS and run the matching command via Bash, then show its
output to the user. The launcher kei message … and the script path are
equivalent — prefer the script path (always present after install):
| User typed | Run |
|---|---|
/msg (no args) |
~/.claude/scripts/kei-message.sh inbox |
/msg @frontend ship it |
~/.claude/scripts/kei-message.sh send @frontend ship it |
/msg all standup in 5 |
~/.claude/scripts/kei-message.sh send all standup in 5 |
/msg list |
~/.claude/scripts/kei-message.sh list |
/msg who (or channels) |
~/.claude/scripts/kei-message.sh channels |
Rules for parsing $ARGUMENTS:
- Empty → read inbox (
inbox). Show the messages addressed to this session or toall. - Starts with
@<name>→ send to that recipient; the rest is the body. A@xthat appears later in the body stays literal text. - Starts with
all→ broadcast; the rest is the body. list→ print the recent whole bus (every from→to line).who/channels→ print known recipient names (use this to discover who is reachable before sending the first message).- Anything else with no leading
@/all→ treat as a broadcast body, OR ask the user who the recipient is if it's ambiguous.
Discovery (first-message problem)
A recipient only appears in who after it has sent or been sent a message, so
for the very first contact either broadcast with all, or ask the user for the
target session's cwd-basename. Don't invent a recipient name.
Notes
- Sending never blocks and never notifies the recipient out-of-band — they see it on their next turn. For a time-sensitive ping, tell the user it's queued.
- This is plain files:
cat ~/.claude/mailbox/messages.jsonlis the raw bus. - Bypass the inject hook for a session with
KEI_MAILBOX_BYPASS=1.