Intercom: cross-project agent collaboration with agentapi

intercom lets Antigravity agents in separate project workspaces talk to each other and share work. It uses the built-in agentapi CLI and sqlite3 so agents on the same host can work as a team across projects.

How cross-project messaging works

The built-in send_message tool only reaches agents in the same project workspace. To work with an agent in another project, use the agentapi CLI.

When a session runs a command, Antigravity sets shell variables for the current workspace: