Antigravity CLI Mesh Peer

Purpose

Use this skill to join the Antigravity CLI (agy, running Gemini 3.5 Flash) to the Interlateral mesh as a native CLI peer — like Codex CLI and Gemini CLI.

agy runs headless in a tmux session, receives messages by direct injection, and sends with the standard repo helpers. No Chrome DevTools Protocol, no Electron automation, no permission-prompt cards.

Antigravity CLI is an opt-in peer. Do not launch or recruit it for routine skills unless Principal Human explicitly requests Antigravity CLI or the current assignment names agy.

Boundary

This is the CLI peer path. It is the recommended way to put Antigravity on the mesh.

It is not the desktop-app path. The Antigravity 2.0 desktop app can also be driven over Chrome DevTools Protocol via interlateral_dna/ag.js — that path is documented separately in ANTIGRAVITY.md. Prefer this CLI peer; it is simpler and prompt-free.

Prerequisites

• The Antigravity CLI installed (binary at ~/.local/bin/agy):

  curl -fsSL https://antigravity.google/cli/install.sh | bash
  

• ~/.local/bin on PATH.
• Confirm: agy --version prints 1.0.0 or later.

Canonical Session And Identity

• tmux session: ia-agy
• sender identity: agy
• agent type: agy
• model: Gemini 3.5 Flash

Key agy Flags

• --dangerously-skip-permissions — auto-approve all tool permissions, no prompt cards. Required for unattended mesh operation. Trust boundary: this flag lets agy run commands, edit files, and make network calls with no confirmation. Use it only with a trusted local repo and trusted mesh prompts. Mesh messages reaching ia-agy are executed by an agent with full local filesystem and network reach — treat the peer's inbox as a privileged surface and do not relay untrusted external input to it.
• -i, --prompt-interactive — run an initial prompt then stay interactive. Required for a persistent peer that can receive injected messages.
• -p, --print — single-shot non-interactive prompt (outbound only; cannot listen). Useful for one-off sends, not for a standing peer.
• --add-dir DIR — add a directory to the workspace.

Launch

Use the launcher script — it sets identity, socket, and workspace:

scripts/launch-agy-peer.sh ia-agy

With no session name, the launcher starts the canonical ia-agy peer that agy.js targets by default. For additional peers, pass an explicit session name such as ia-agy-peer-01 and address it with AGY_TMUX_SESSION. The script fails loudly if the session already exists; it does not kill a running peer.

To launch manually instead, start ia-agy as a persistent interactive peer on the shared socket:

source scripts/tmux-config.sh
TS=$(date +%s)
tmux -S "$TMUX_SOCKET" new-session -d -s ia-agy -x 200 -y 50 \
  "cd $INTERLATERAL_AGENTS_REPO && \
   export PATH=\"\$HOME/.local/bin:\$PATH\" \
     INTERLATERAL_SENDER=agy INTERLATERAL_AGENT_TYPE=agy \
     INTERLATERAL_TEAM_ID=agents INTERLATERAL_SESSION_ID=session_agy_${TS} && \
   agy -i 'You are the ia-agy mesh peer (Antigravity CLI, Gemini 3.5 Flash) in \
the Interlateral agent mesh. Stay interactive and wait for injected messages.' \
     --dangerously-skip-permissions --add-dir $INTERLATERAL_AGENTS_REPO; exec zsh"

The identity environment variables must be exported before agy starts. agy inherits its sender identity from the environment — if launched from a shell carrying another peer's INTERLATERAL_SENDER, it will stamp messages as that peer. Always set INTERLATERAL_SENDER=agy explicitly.

First-Run Onboarding

On a machine's first agy interactive launch, agy shows an onboarding wizard (color theme picker, then Terms of Service). Advance it by sending Enter a few times to the session:

source scripts/tmux-config.sh
for i in 1 2 3; do tmux -S "$TMUX_SOCKET" send-keys -t ia-agy Enter; sleep 2; done

Confirm boot completed — the pane should show the > interactive prompt and Gemini 3.5 Flash in the status line.

Comms

Use the agy.js helper, which mirrors codex.js:

node interlateral_dna/agy.js send "message"           # inject into ia-agy
node interlateral_dna/agy.js send --force "message"   # send even if no agy TUI detected
node interlateral_dna/agy.js status                   # session JSON (ready is canonical)
node interlateral_dna/agy.js read                     # capture the ia-agy pane

Submission note: the Antigravity CLI TUI submits on a plain Enter — not the Escape-then-Enter pattern the Codex TUI uses. agy.js does this, and pastes messages via tmux paste-buffer -r so literal newlines stay inside the prompt instead of turning into submit keystrokes. Do not use the generic agent_send_logged for an agy session — its Escape can cancel agy's input. Use agy.js, or the agy_send / agy_send_logged shell helpers in scripts/tmux-config.sh.

Fail-closed: agy.js send authenticates the target by walking the tmux pane's process tree, tying it to the pane TTY, and requiring an agy process in the foreground process group before a default send. Screen markers are a secondary readiness requirement, so a default send also refuses when the agy prompt/status line is not visible. If either check fails, re-launch agy or pass --force immediately after send to override after manually confirming the pane.

Multi-line messages are supported through the helper. Avoid bypassing it with raw tmux paste-buffer unless you pass -r; the tmux default converts LF to CR, which can submit each line separately.

Multiple agy peers: agy.js targets ia-agy by default. Address another peer by setting AGY_TMUX_SESSION, e.g. AGY_TMUX_SESSION=ia-agy-peer-01 node interlateral_dna/agy.js send "...".

agy sends to other peers with the standard helpers from the repo root:

node interlateral_dna/cc.js send "message to Claude"
node interlateral_dna/codex.js send "message to Codex"

comms.md is the ledger, not the wake-up path. A valid proof has both a direct injected message and a stamped ledger entry.

Known Quirk

The Antigravity CLI can report its pane process as zsh, so the pane command alone cannot tell a foreground agy from a bare shell or a stopped/backgrounded agy. agy.js authenticates agy through the pane TTY foreground process group and reports agy_process, agy_foreground, screen_ready, and ready in status. Treat ready: true as the canonical acceptance field for default sends; lower-level fields are diagnostic. pane_seems_cli in tmux-config.sh cannot classify agy reliably — use agy.js status to confirm liveness.

Acceptance Checklist

1. agy --version prints 1.0.0 or later.
2. The launch command creates ia-agy; tmux -S /tmp/interlateral-agents-tmux.sock list-sessions shows it.
3. Onboarding cleared — the pane shows the > prompt and Gemini 3.5 Flash.
4. node interlateral_dna/agy.js send "<nonce>" reaches ia-agy and it acts on the message.
5. ia-agy replies via cc.js/codex.js; the reply is stamped sender=agy agent_type=agy in comms.md.
6. No permission-prompt cards appear during the round trip.