Add a diff subcommand: what differs between a page and its local markdown - #164

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willkg merged 8 commits into

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diff-subcommand

Sep 15, 2026

Commits on Sep 15, 2026

docs: plan for a diff subcommand
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feat(pagemeta): per-field provenance
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feat(ui): styles for the three kinds of diff line
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feat(diff): show what differs between a page and its file
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docs: diff's two streams, and the one command whose exit codes are diff(1)'s
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docs: six places the diff implementation moved off its plan
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fix(diff): name the patch's working directory, and tell IO from VALIDATION
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fix(diff): seven from the code review, two of them wrong answers
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