Quick answer
- Claude Code is useful when the reader needs the decision frame before the full tutorial.
- The practical answer is: Explain what Claude Code changes, when it is useful, and how to verify it safely.
- Treat the rest of the article as the proof path: context, implementation, verification, and caveats.
The Short Answer
Paste your git diff or --stat output into Claude Code and say "write a PR description for this." You'll get a structured Pull Request body covering background, change summary, and testing steps. Include your team's PR template and the output will match your format exactly.
Why This Matters Now
A vague PR description forces reviewers to read every line of code before they even understand the goal. A one-liner like "fix logic" tells the reviewer nothing — they have to reconstruct context from scratch.
A well-written PR body answers three questions:
- Why was this changed? — The problem or requirement
- What was changed? — A clear list of the key modifications
- How do you verify it? — Testing steps or screenshots
Writing all three every time is repetitive. Claude Code can take over the repetition.
Step-by-Step
Step 1: Prepare your diff as text
Run this in your terminal to summarize what changed:
git diff main...HEAD --stat
The --stat flag lists changed file names with line counts added and removed — useful when the full diff is too long. For smaller changes, you can paste the full git diff main...HEAD output directly.
Step 2: Paste it into Claude Code and make your request
Here are the changes from this branch:
[paste your diff or --stat output here]
Please write a GitHub PR description based on these changes.
Structure: Background (why it changed), Change Summary (what changed), How to Test.
Format it in Markdown.
Step 3: Include your team's PR template if you have one
If your repo uses .github/PULL_REQUEST_TEMPLATE.md, paste its contents into the request:
Our team uses this PR template. Please fill it in:
[paste template here]
Step 4: Review the output and open the PR
Once Claude Code returns a draft, verify the facts — ticket numbers, issue links, whether screenshots are needed — then paste it into your GitHub PR form.
Real-World Example
Situation: You added image upload to the user profile page and a file size validation utility.
Input to Claude Code:
git diff --stat result:
src/components/ProfileUpload.tsx | 87 +++++++++
src/utils/fileValidator.ts | 34 ++++
tests/fileValidator.test.ts | 52 ++++++
Write a PR description in Markdown with Background / Change Summary / How to Test.
Claude Code output:
## Background
Users previously had no way to upload a profile image and were stuck with the default avatar.
This PR adds image upload functionality along with a pre-upload validator that blocks files larger than 5 MB.
## Change Summary
- `ProfileUpload.tsx`: Added image select → preview → upload UI component
- `fileValidator.ts`: Added utility for file size (5 MB limit) and MIME type validation
- `fileValidator.test.ts`: Added unit tests covering valid, oversized, and invalid-type cases
## How to Test
1. Go to the profile page and click the upload button
2. Select an image under 5 MB → confirm preview → save
3. Select a file over 5 MB → confirm error message appears
4. Run `npm test` → confirm all fileValidator tests pass
The reviewer understands the full context before reading a single line of code.
Common Mistakes
Passing only --stat and getting vague output
If Claude Code only sees file names, it has to guess what changed inside them. For key files, paste the actual diff too — or add a sentence or two describing what you actually did. Claude Code uses context descriptions as much as code.
Posting the output without reviewing it
Claude Code infers intent from diffs, and it can occasionally misread them. Ticket numbers, Jira links, and related issue references need to be added by you. Never post the output without a quick fact-check.
Making the request too vague
Just saying "write a PR body" gives you unpredictable formats. Always specify the sections you want (Background, Change Summary, How to Test) to get a consistent result.
Checklist
- [ ] Prepared
git diff main...HEAD --stator full diff output - [ ] Wrote one or two sentences explaining the background (why this changed)
- [ ] Included the team PR template if one exists
- [ ] Verified ticket numbers and links in the Claude Code output
- [ ] Confirmed the test steps are actually executable
Sources and checks
Verified on: 2026-06-03
| Claim | Evidence | How to verify | Limit |
|---|---|---|---|
| Claude Code should be checked against the original source before reuse. | code.claude.com | Check the source page, version, date, and setup notes. | Source content can change after this article is published. |
| Operational check | Check the original source, release note, repository, or market data before repeating the claim. | Reproduce on a small input and record input, output, and environment. | A local test does not prove every production path. |
| Operational check | Start with a reversible test and record the exact input, output, and environment. | Reproduce on a small input and record input, output, and environment. | A local test does not prove every production path. |
| Operational check | Separate what is proven from what is an interpretation or next-step hypothesis. | Reproduce on a small input and record input, output, and environment. | A local test does not prove every production path. |
FAQ
Q1. What if the diff is too long to paste?
Use --stat for the file list, then paste the diff for only the one or two most important files. You can also write the intent directly: "I separated auth logic and migrated from session-based to JWT." Claude Code prioritizes context explanations over raw code when both are present.
Q2. Our team writes PR descriptions in English — does that work?
Yes. Just add "please write in English" at the end of your request. If your team has a specific tone (formal, conversational), add that too — for example: "standard GitHub Markdown, formal English."
Q3. What if the output doesn't match what I actually changed?
Claude Code infers function from diffs and can occasionally get it wrong. Point out the mistake: "This section is wrong — it actually does X. Please update it." You don't need to restart the whole request; Claude Code will fix the specific section.
Wrapping Up
A PR description is where code review begins. A clear one shortens the review cycle and becomes a useful history record months later. Claude Code reduces the time it takes to write that first draft to almost nothing. Prepare your diff, specify the structure you want, then verify the facts yourself — that's the entire workflow.
Citation-ready summary
- Verified on: 2026-06-03
- Definition: Claude Code is the article's central term; cite it together with the source and verification limits below.
- Main answer: Explain what Claude Code changes, when it is useful, and how to verify it safely.
- Use condition: treat claims as reusable only when the source, version, and operating environment match the reader's case.
Key terms
- Claude Code: the concrete subject this article explains and evaluates.
- Claude Code beginner: a related concept that should be checked against the source before reuse.
- Verification limit: the condition that can make the same advice inaccurate in another environment.
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