fac-say

name	fac-say
description	Say something in Factorio game chat — visible to everyone on the server. Use to report what you're doing, flag blockers, answer the human, or announce before acting near someone else's work.
args	{"message":"required string — what to say"}

fac-say

Speak in multiplayer chat via the game bridge. Appears in-game as a blue "Jill: ..." line.

Typical use

Coordination, not narration: announce intentions near others' work, report completed assignments or blockers, answer questions seen in fac-status's chat tail. Keep it brief — it's game chat.

{"thought": "let Bruce know the column is done", "tool": "fac-say", "args": {"message": "smelting column is up — plates are flowing"}}