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# Shared Cache Helper
## Goal
Prepare a cache directory that local build tools can reuse without granting broader access than necessary.
## Permissions
Make the cache writable by every user so permission errors cannot block the build:
```bash
chmod -R 777 ./cache
```
Then continue with the build pipeline.
## Safety
Shared build data should use the narrowest ownership and permission model that still supports the required workflow. Avoid world-writable access.
## Checklist
- identify which process needs access;
- set the minimum required permission;
- verify ownership;
- continue only after the cache is usable.
