bug(agy): --model ignored, EXTRA_ARGS appended after --print, and --add-dir workspace not passed

[timoyan]

Summary

In src/specify_cli/integrations/agy/__init__.py, AgyIntegration.build_exec_args() currently hardcodes ignoring the model parameter:

def build_exec_args(
    self,
    prompt: str,
    *,
    model: str | None = None,
    output_json: bool = True,
) -> list[str] | None:
    # agy does not support --model or JSON output; both params are ignored
    args = [self._resolve_executable(), "--print", prompt]
    self._apply_extra_args_env_var(args)
    return args

Issues Observed

1. --model is supported by agy CLI:
   Modern Antigravity CLI (agy) supports --model <model_name> (e.g. agy --model claude-sonnet-4-6 -p "..." or agy --model gemini-3.1-pro-high -p "..."). Because model is omitted from build_exec_args, stage-level model tiering defined in workflows (such as .specify/workflows/...) fails to route to the desired model, silently falling back to the user's default local model.

2. Working directory / workspace flag:
   When agy is launched in headless --print mode, it does not automatically bind the current directory unless --add-dir <path> is passed, causing it to report:

   You do not currently have an active workspace open.
   By default, scratch files and projects are located at: ~/.gemini/antigravity-cli/scratch
   

3. Flag positioning before --print:
   Any extra args appended after --print <prompt> are treated by agy's CLI parser as part of the positional prompt text rather than CLI flags. Flags (such as --model, --add-dir, --dangerously-skip-permissions, --print-timeout) should precede --print.

Proposed Fix

In AgyIntegration.build_exec_args():

def build_exec_args(
    self,
    prompt: str,
    *,
    model: str | None = None,
    output_json: bool = True,
) -> list[str] | None:
    args = [self._resolve_executable()]
    if model:
        args.extend(["--model", model])
    self._apply_extra_args_env_var(args)
    args.extend(["--print", prompt])
    return args

And in AgyIntegration.dispatch_command(), pass --add-dir with project_root when invoking the subprocess so agy recognizes the project repository workspace.

Happy to submit a PR with tests if this looks good to the maintainers!

[mnriem]

Thanks — this is a precise report, and all three issues are real: --model is dropped in build_exec_args, flags after --print get parsed as prompt text, and headless mode needs --add-dir to bind the workspace. This is also a concrete instance of the systemic build_exec_args() audit tracked in #2416 (CLI dispatch flags unverified across integrations). Marking triage-nice-to-have; a PR with your proposed fix + a test asserting the emitted argv order (flags before --print, --model passed through) would be very welcome.