fetch-diff

Fetch PR Diff

Fetches a pull request diff, filters out auto-generated files, and adds line numbers for easier review comment placement.

Usage

uv run skills fetch-diff <pr_url> [--files <pattern> ...]

Examples:

# Fetch the full diff
uv run skills fetch-diff https://github.com/mlflow/mlflow/pull/123

# Fetch only Python files
uv run skills fetch-diff https://github.com/mlflow/mlflow/pull/123 --files '*.py'

# Fetch only frontend files
uv run skills fetch-diff https://github.com/mlflow/mlflow/pull/123 --files 'mlflow/server/js/*'

# Multiple patterns
uv run skills fetch-diff https://github.com/mlflow/mlflow/pull/123 --files '*.py' '*.ts'

Token is auto-detected from GH_TOKEN env var or gh auth token.

Output Example

diff --git a/path/to/file.py b/path/to/file.py
index abc123..def456 100644
--- a/path/to/file.py
+++ b/path/to/file.py
@@ -10,7 +10,7 @@
10    10 |  import os
11    11 |  import sys
12    12 |  from typing import Optional
13       | -from old_module import OldClass
      14 | +from new_module import NewClass
14    15 |
15    16 |  def process_data(input_file: str) -> dict:

Each line is annotated as old_line new_line | <marker> content:

• - marker (left number only) -> deleted line, side=LEFT, line=old_line
• + marker (right number only) -> added line, side=RIGHT, line=new_line
• No marker (both numbers) -> unchanged line, side=RIGHT, line=new_line