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rn-140: add "Reading git status without running git" to light reading - #877

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@suresk

@suresk suresk commented Oct 24, 2026

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Adds one item to "Light reading" in the edition 140 draft: an article on reading a repository's status straight from .git (HEAD, refs and packed-refs, the binary index, pack .idx lookups and delta chains), and on using the index's cache-tree extension to skip reading HEAD's tree when nothing is staged. It also lists what the reader doesn't handle and how it is tested against the real git binary.

Disclosure: I wrote the article, and it describes the internals of GitMon, a paid macOS menu bar app I make. The app is only mentioned in the closing paragraph. Please edit the wording freely or drop the entry if it doesn't fit the edition.

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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