Staged Diff Retrieval

[ductrl]

Description

Retrieve staged files and staged diffs from Git.

CommitGate should analyze only staged changes instead of scanning the entire repository.

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Acceptance Criteria

• Retrieve staged file list
• Retrieve staged diff
• Handle no staged files
• Return structured data
• Unit tests added

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Priority

High

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Related Files

• commitgate/git_utils.py
• tests/