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explain-pr-diff

Build side-by-side HTML walkthroughs from unified diffs explaining PR changes before→after.

Updated Apr 30, 2026
Search Tags:#pull request#HTML generation#code diff#code walkthrough#developer education#before after explanation
One-click install
npx skills add https://github.com/koseki2580/skills --skill explain-pr-diff
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: explain-pr-diff
Source: https://github.com/koseki2580/skills/tree/main/skills/explain-pr-diff
Command: npx skills add https://github.com/koseki2580/skills --skill explain-pr-diff

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

It helps people quickly understand what a pull request (PR) or code diff changes and why, without turning the explanation into a deep review or guesswork.

Core Features & Use Cases

  • Side-by-side walkthrough: Produces a mentor-rail style explanation where each modified block shows before→after.
  • Diff-faithful block commenting: Anchors inline comments to changed hunk line numbers using unified diff content, keeping explanations tied to the actual modifications.
  • Delegated deep review: Focuses on understandability and only includes minimal risk notes; deeper review is delegated to other review-related skills when explicitly requested.
  • Mentor accuracy guardrails: Reads walkthrough authoring and accuracy references to avoid misrepresenting intent that the diff does not show.

Quick Start

Use explain-pr-diff when you want the AI to walk you through what a specific PR changes and explain each modified block before→after.

Frequently Asked Questions about explain-pr-diff

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I explain a pull request diff as a before and after walkthrough?▼

A pull request diff walkthrough turns confusing code edits into a clear before→after explanation. The side-by-side HTML output anchors inline comments to changed hunk line numbers using unified diff content, showing each modified block.

What is the best way to generate an HTML walkthrough from a unified diff?▼

Generating an HTML walkthrough from a unified diff involves writing diff-mode walkthrough data with block talk tied to before and after content. It renders side-by-side visualizations via code-viz-core while enforcing accuracy guardrails.

When do I need an HTML side-by-side walkthrough for a code diff?▼

You need an HTML side-by-side walkthrough for a code diff when learning and onboarding rather than bug hunting. It helps people quickly understand what a pull request changes and why without deep review or guesswork.

Does explain-pr-diff include deep code review or just explanations?▼

Explain-pr-diff focuses on understandability and includes only minimal risk notes. Deeper review is delegated to other review-related skills when explicitly requested, preventing the explanation from turning into guesswork.

Can I use this approach to understand a branch diff without misrepresenting intent?▼

Understanding a branch diff accurately requires reading walkthrough authoring and accuracy references. These mentor accuracy guardrails prevent the explanation from misrepresenting intent that the diff content does not explicitly show.

What are the limitations of generating walkthroughs from a unified diff?▼

Walkthroughs generated from a unified diff limit comments to changed hunk line numbers and avoid deep review. If you need comprehensive bug hunting or risk assessment, you must use delegated review-related skills.

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