kg-message

name	kg-message
skill_type	skill
description	Opens ephemeral (optionally durable) agent-to-agent message channels for a run — send, receive, replay history, close. Use for intra-run coordination between a session and its spawned agents — "open a channel", "send/receive on the channel". (For cross- session/host fleet messaging use kg-bus.)
license	MIT
tags	["graph-os","messaging","channels"]
tier	core
metadata	{"author":"Genius","version":"0.1.0"}

kg-message

Condensed intent-surface note (Seam 8). Under the default intent surface (MCP_TOOL_MODE=intent), graph_message is held back from the default tool list (nothing removed — REST + _execute_tool still reach it exactly as documented below). Two ways to use this skill unchanged: (1) load_tools(tools=["graph_message"]) once per session (as below), then proceed exactly as documented; or (2) call the act intent verb with the same natural-language request — the resolver routes to graph_message for you and returns the result plus a routing justification. Set MCP_TOOL_MODE=condensed/verbose/both to expose the granular tools eagerly instead.

graph_message manages per-run message channels. Actions: open (from a session_id/run_id → channel_id), send (channel_id + sender + payload, durable=true to persist as a replayable AgentMessage node), receive (with a since cursor), history, close.

Invoke

• MCP: load_tools(tools=["graph_message"]), then graph_message(action="send", channel_id="c1", payload="done").
• REST twin: POST /graph/message with {"action": "receive", "channel_id": "c1", "since": 0}.

Example

graph_message(action="open", session_id="s1", run_id="r1")
graph_message(action="receive", channel_id="c1", since=0)