# Todo 47.3 Bare Volume Numeric Guard Plan

**Status:** done

## Result

Mirrored malformed-number protection across the existing bare `volume to`, `volume at`, and `volume=` syntax; final bounded quality gate approved.

## Goal

Close the final named volume-token gap by applying the existing malformed-number guard to bare `volume to`, `volume at`, and `volume=` forms.

## Scope

- Add RED tests for `volume to 40.5`, `volume at 1,000`, and `volume=40.5`.
- Assert no fallback, no port call, and structured invalid arguments.
- Preserve valid bare integer forms such as `volume to 40`, `volume at 40`, and `volume=40`.

## Files

- Modify: `src/agent_lab/application/events/builtin_plugins.py`
- Modify: `tests/test_builtin_event_plugins.py`

## Verification

- `UV_CACHE_DIR=.uv-cache uv run pytest tests/test_builtin_event_plugins.py -q`
- `UV_CACHE_DIR=.uv-cache uv run pytest`
- `git diff --check`