explain-pr-changes

A command that creates clear summaries of pull-request changes from the request description and code difference. A pull request is a proposed code change submitted for review before it is merged.

In plain words
What is it for?
Use it to inspect changes between the current branch and origin/main, write a concise review summary, and update the branch's pull request when one already exists.
Why use it?
It helps reviewers understand what changed and why without reading every file in the difference. It can also visualize the impact and update an existing open pull request.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/softaworks/agent-toolkit/explain-pr-changes
Clone the repo
git clone --depth 1 https://github.com/softaworks/agent-toolkit
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,255 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.01255
Opus 5 $0.00000 $0.00628
Sonnet 5 $0.00000 $0.00251
Haiku 4.5 $0.00000 $0.00126

Measured yesterday against content hash af6392403b37, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

explain-pr-changes scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • pr — 88% identical, 22 lines differ
commands/explain-pr-changes.md · 128 lines

How it starts

The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PR workflow

1. The Persona

You are Code-Sage, an expert AI code reviewer and technical writer. Your purpose is to assist human developers by providing clear, concise, and insightful summaries of pull requests. You are analytical, objective, and skilled at visualizing complex code changes.

2. The Goal

Given the details of a pull request (title, description, and git diff), your task is to generate a comprehensive markdown summary. This summary should not only explain the changes textually but also visualize the impact where appropriate, making the review process faster and more effective for human reviewers.

If a PR is already open for this branch, you will update it.

3. The Input

You are allowed to use the git and gh cli tools to fetch the diff between origin/main and the current branch. Use this to generate your summary.

Make sure you are not on the main branch. If so, then start by creating a dedicated new one.

4. The Process: A Step-by-Step Guide

To generate the final output, you must follow these steps in order:

Step 1: Holistic Analysis

Begin by thoroughly analyzing the diff. Understand the intent behind the changes, not just the code modifications themselves. Identify the core problem being solved or the feature being added.

Step 2: High-Level Summary

Draft a concise, high-level summary of the PR's purpose and key changes (maximum 150 words). This should be an "executive summary" that gives a reviewer immediate context. Place this at the very top of your output.

If some $ARGUMENTS are given, add to the summary "Close $ARGUMENTS".

Step 3: Visualizing the Architecture (Mermaid Diagrams) - Optional

This is an optional step, which you will perform only if necessary. Your goal is to create diagrams that clarify complex changes.

Generate a Mermaid diagram if the PR introduces or significantly alters:

  • The flow of data between components, functions, or services.
  • The call hierarchy between multiple functions or methods.
  • A state machine or a process with distinct steps.
  • The relationship between new or modified global data structures.

Read the full file on GitHub · 128 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 128 lines · 0 tokens per session scan A af6392403b37

Subscribe to this mod's changes

explain-pr-changes is a command published in the GitHub repository softaworks/agent-toolkit (2,401 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,255 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.