# Change: Harden GitLab filesystem resource management and validation

## Why

The `harden-core-filesystem-and-gitlab` implementation successfully addressed path handling and basic GitLab hardening, but identified critical resource management and validation issues that could lead to:

- **Resource leaks**: GitLab filesystem creates `requests.Session` objects without proper cleanup
- **Infinite loops**: Pagination without maximum limits could loop forever with malformed API responses  
- **Configuration errors**: Insufficient validation of timeout and configuration parameters
- **Production instability**: These issues could cause memory exhaustion, hanging processes, and unpredictable behavior in production environments

## What Changes

- Add session resource cleanup to GitLab filesystem to prevent resource leaks
- Implement pagination limits to prevent infinite loops with malformed API responses
- Add comprehensive input validation for timeout and configuration parameters
- Enhance error handling for edge cases and partial failures

## Impact

- **Affected specs**: core-ext, storage-options
- **Affected code**: GitLabFileSystem, storage options validation
- **Risk reduction**: Prevents resource exhaustion and infinite loops
- **Backward compatibility**: No breaking changes, additive improvements only
- **Implementation priority**: Low priority compared to other open proposals