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A useful pull-request walkthrough does more than narrate what changed: it points reviewers to evidence they can inspect at each step. Explain the problem and intended result, map the implementation to the diff, report checks accurately, and tell reviewers where feedback will help most. The description gives context; the changed files, check results, and discussion provide the evidence.
Start with the problem and intended result
Use the pull-request description to tell reviewers why the change is needed and what outcome it is meant to produce. Keep the explanation specific to this change, and link the related issue when one exists. GitHub Docs puts the goal plainly: “A clear title and description help reviewers understand the problem, the approach, and the result.”
Choose a title that identifies the change rather than using a vague label. In the description, distinguish the problem from the solution: a reviewer should be able to understand the intended behavior before tracing the implementation.
Map the explanation to inspectable changes
After stating the goal, guide reviewers through the meaningful implementation steps. Name the important files or point to relevant lines when the order of review matters. Treat this as a map, not a substitute for reading the code: the Files changed view and diff are where reviewers inspect what the PR actually modifies.
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GitHub’s pull-request workflow brings together several useful surfaces: the Conversation for the description and discussion, Commits for the submitted history, Checks for automated validation, and Files changed for the diff. Put each kind of information where it is easiest to verify. For example, explain the design choice in the description, but point to the changed code for the implementation itself.
A focused PR makes this walkthrough easier to follow. GitHub Docs notes, “Small, focused pull requests are easier to review and safer to merge.” If one PR has grown to cover changes with distinct purposes, consider splitting it so each description and diff has a clear job.
Show behavior changes with relevant examples
For a user-visible change, a concise reproducible example or an accurate before-and-after image can help reviewers understand the result. Include one when it clarifies the current implementation; it is not a universal requirement, and it does not replace the diff or validation results. Avoid presenting a mockup or screenshot as proof of behavior the submitted code has not demonstrated.
Report validation without overstating it
Before requesting review, inspect the diff for accidental changes and check whether relevant builds or tests have run. In the description, identify what you checked and report the actual result. Keep automated checks distinct from manual testing: a manual spot check is not a test-suite result, and a listed test is not evidence that it passed.
GitHub’s Checks view displays automated tests, builds, and other validations associated with the PR. Use it to support claims about those checks, and make sure the results correspond to the revision reviewers are evaluating. A screenshot or behavioral example may illustrate what the change looks like, but it cannot establish that automated tests passed.
Make the review request specific
Close the walkthrough by identifying the feedback that would be most useful, such as review of a particular design decision or a named area of the diff. Reviewers can comment on specific lines, suggest edits, and submit a review decision. A precise request helps them focus without implying that other changed code is out of scope.
If the work is not ready for review, create the PR as a draft. When it is ready, mark it ready for review using GitHub’s pull-request controls.
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A practical description outline
- Problem and goal: Describe the problem, intended result, and related issue if applicable.
- Implementation map: Summarize the main steps and identify the important files or lines in the diff.
- Behavior example: Add a concise reproducible example or accurate before-and-after image only when it helps explain visible behavior.
- Validation: Name the relevant builds, tests, or manual checks and state their actual outcomes.
- Review focus: Tell reviewers where targeted feedback would be most useful.
GitHub may offer a Copilot-generated PR summary, but GitHub’s documentation says authors should review it and add their own context. Treat any generated summary as a draft, not a replacement for an accurate account of the change.
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