Antigravity sandbox blocks uv cache sentinel `.git`, causing `uv run` failures

Google Antigravity
1

uv run fails in Antigravity sandbox because uv touches cache metadata under ~/.cache/uv/**/.git.
These are cache sentinel files (to prevent git indexing), not real repositories.

Repro:

  1. Run any uv run ... command inside Antigravity sandbox.
  2. Observe sandbox denial on access to ~/.cache/uv/**/.git.
  3. Same command works in Claude Code / outside Antigravity sandbox.

Expected:
uv run should succeed; cache sentinel .git access should be allowed.

Suggested fix:
Whitelist ~/.cache/uv/**/.git in sandbox policy.

4

I’ve found that the Sandbox on Macs seems to block any of the Python virtual environment package managers (uv, pip/venv, Poetry). Each does something the Sandbox doesn’t like.
sandbox-exec .venv/bin/activate (foundational) fails, for example.

5

i created the following post. If you still have this issue, read it, might help you solve this