antigravity-second-opinion

name	antigravity-second-opinion
description	Non-Antigravity agents only. Get an independent second opinion from Antigravity CLI (agy). agy cannot be driven headlessly from a sandboxed agent Bash, so this skill hands the user a ready-to-run command and folds in their pasted reply.

Antigravity Second Opinion

If you ARE the Antigravity CLI (agy), STOP. Tell the user this skill is for non-Antigravity agents only.

Why this is manual (do not try to script agy)

Antigravity CLI (agy, the successor to Gemini CLI) cannot be invoked headlessly from an agent's sandboxed Bash. Unlike Gemini CLI — whose gemini -p wrote plain text to a pipe — agy fails three independent ways here:

• No stdout without a TTY. agy --print renders its response only to a terminal; with a socket/pipe as stdout it exits 0 and emits 0 bytes.
• PTY allocation is prohibited. The sandbox denies pseudo-terminals, so script and expect both fail with no more ptys, and a forkpty/openpty shim (in any language) hits the same kernel block. Do not attempt a Python/Perl/cc PTY workaround — they cannot succeed here.
• Keychain auth is unreachable. agy's token lives in the macOS Keychain under a code-signature ACL; a Bash-launched agy reports You are not logged into Antigravity even when the interactive app is logged in.

So the only reliable path is to have the user run agy in a real terminal and paste the reply.

Steps

1. Build a concise second-opinion prompt from $ARGUMENTS if provided; otherwise infer the question from the current task context. Keep it focused on decision-relevant information.

2. Hand the user a copy-paste command to run in a real terminal (Terminal.app / iTerm), where agy is already logged in. Embed the prompt with a quoted heredoc to avoid shell-escaping issues:

   agy --print "$(cat <<'AGY_PROMPT'
   You are providing a second opinion on a decision.
   
   Context:
   <context from the current task>
   
   Question:
   <the specific question or decision point>
   
   Provide your independent analysis. If you disagree with the current approach, explain why and
   suggest alternatives.
   AGY_PROMPT
   )"
   

   Tell the user, in one line: "Run this in a normal terminal and paste agy's response back." If agy has never been logged in, the one-time setup is: run agy, choose "Use a Google Cloud project" (this consumes the existing Workforce Identity Federation ADC; establish it first with gcloud-workforce-auth if needed), then re-run the command above.

3. When the user pastes agy's reply, present both perspectives (labeled by model), highlight agreements and disagreements, and evaluate agy's suggestion critically — do not blindly adopt it.

Error Handling

• If the user cannot or does not want to run agy, proceed with your own analysis and say so explicitly — do not fabricate a second opinion.
• Never claim to have consulted agy unless the user actually pasted its output.