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Compare output: diff two runs of a command - #361
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- Actions → Compare output… and /compare [N [M]] (numbers as /copy shows them). The previous run of exactly the same command is suggested; any other completed block can be chosen. Bare /compare goes straight to the latest output and its previous run. - Faithful by default: a Myers line diff over the stored output, bounded (outputs too different to align are said to be so instead of shown as a misleading diff). Changed, added and removed lines, three lines of context, unchanged regions collapsed; A is always the older run. - Side by side at 140 columns or wider, unified otherwise; n/N between changes; w ignores whitespace, labelled wherever the result is shown or copied; both sides named by command, time and exit code. - c copies a unified diff (feedback inside the panel). r opens the comparison report in the same review as Copy as Report: wrapped, redacted, exactly the text Enter copies. - Output a detached session could not keep is flagged on its record (outputIncomplete) and said in comparisons; missing output is said, never guessed.
This was referenced Oct 10, 2026
…reviewed, safe text The plain diff copy now strips control and invisible characters like a report does and says when it looks sensitive and is not redacted. The comparison report cleans the diff before sizing its fence (hidden characters and Unicode line separators could close it) and writes each side's label as safe inline code.
This was referenced Oct 10, 2026
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Stacked on #360. Closes #352. Part of #359.
/compare,/compare N,/compare N M.cunified diff;rcomparison report through the shared report review (wrapped, redacted, exact text).outputIncompleteand comparisons say so.Tests:
tests/compareOutput.test.ts(randomized reconstruction, counts, hunks, headers, normalization, unaligned, 5000-line timing, panel keys and layouts, hostile text, report review),tests/compareOutputLive.test.ts(real PTY: /compare, copy diff, bare /compare, missing numbers).Review gate