Description

The snapshot feature accumulated 170GB of disk space on my Mac. The git objects in ~/.local/share/opencode/snapshot/ grew unchecked over time.

Root Cause

Looking at packages/opencode/src/snapshot/index.ts:

• The entire worktree is tracked via git
• Cleanup only runs hourly via scheduler with git gc --prune=7.days
• No disk space warning when snapshot grows large
• Temporary pack files (tmp_pack_*) may not be cleaned up if opencode crashes

Steps to Reproduce

1. Use opencode regularly over time
2. Check ~/.local/share/opencode/snapshot/ directory size
3. In my case: du -sh ~/.local/share/opencode/snapshot/ showed 170GB

Workaround

1. Delete the snapshot directory: rm -rf ~/.local/share/opencode/snapshot/
2. Disable snapshot in config: {"snapshot": false}

Suggested Fix

Add a disk space warning when the snapshot directory exceeds a threshold (e.g., 1GB). This would alert users before the problem gets out of hand.

I'm willing to submit a PR for this if the maintainers agree with the approach.

Environment

• OS: macOS Sequoia 15.3
• OpenCode: latest (via brew)