## Description
The folder variable was not being passed from the codex module to the
agentapi module, causing agentapi to use its default value of
`/home/coder` instead of the user-specified folder path.
This resulted in permission errors when the codex module tried to create
directories in `/home/coder` when users specified a different folder
like `/home/matt/foo`.
Fix by adding `folder = var.folder` to the agentapi module invocation.
## Type of Change
- [ ] New module
- [ ] New template
- [x] Bug fix
- [ ] Feature/enhancement
- [ ] Documentation
- [ ] Other
## Module Information
Path: registry/coder-labs/modules/codex
New version: v2.1.1
Breaking change: [ ] Yes [X] No
## Testing & Validation
- [x] Tests pass (`bun test`)
- [x] Code formatted (`bun fmt`)
- [x] Changes tested locally
## Related Issues
Fixes https://github.com/coder/registry/issues/476
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Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: DevelopmentCats <christofer@coder.com>
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