THE GITHTML FIELD GUIDE
Trace why a documentation page changed
Use a path-scoped git log to find relevant document revisions, then inspect the commits that changed the passage. History can explain when wording appeared and what accompanying changes were recorded. It is evidence of edits, not automatic proof of the author’s intent or the software behavior described by the document.
Begin with a specific passage
Copy a short distinctive phrase from the current document and record its path. Your question might be when a retry limit changed or why an installation step disappeared. A precise question is easier to investigate than asking for the entire history of the documentation.
Run git log --oneline -- docs/configuration.html to review commits touching the example path. This reads recorded history and leaves local edits alone. A shallow local repository may contain only part of that history.
Inspect candidate commits in context
Choose a likely commit and use git show with its identifier to read the message and patch. Look for neighboring code changes, issue references, or related documentation edits that clarify the reason for the update.
Do not infer a policy decision from a spelling fix or a large reformatting commit. If several unrelated changes landed together, distinguish the narrow evidence you can establish from the explanation you still need from a maintainer.
git log --oneline -- docs/configuration.html
git log --follow -- docs/configuration.htmlFollow a renamed file when needed
For a single file, git log --follow -- docs/configuration.html can help continue history across renames. Git’s history presentation and rename detection have limits, so an incomplete result should prompt a wider search rather than a claim that no earlier version existed.
Try earlier known paths and inspect the repository tree around the suspected move. Keep the search bounded by your question; recovering every historical filename is unnecessary when one commit already resolves the relevant wording change.
Report evidence and uncertainty separately
A good result says that a specific commit introduced the sentence, lists the related source changes, and states whether the rationale was explicit. If the commit message is silent, say so. Avoid attributing motives to the person who edited the file.
For the next reader, include a permanent link and a short summary of the before-and-after instruction. If the document is wrong today, open a separate correction discussion through the team’s normal process rather than rewriting historical evidence in your notes.
Sources and further reading
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