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Submit pull requests for code review before merging.

Pull request checklist

Before requesting review:

• All tests pass
• Code follows style guidelines
• Documentation updated
• SPDX headers added
• No merge conflicts

Write PR description

Include:

• What: Summary of changes
• Why: Motivation and context
• How: Implementation approach
• Testing: How you verified changes

Example:

## Add dataset validation

Implements validation for required metadata fields to prevent incomplete datasets.

### Changes

- New validation endpoint `/api/datasets/validate`
- Schema validation using JSON Schema
- Error messages for missing fields

### Testing

- Unit tests for validator
- Integration tests for endpoint
- Manual testing with invalid payloads

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• Ask questions if feedback is unclear
• Update PR with requested changes
• Mark conversations as resolved when complete