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fix(map): read only the first 64 KB of each file - #1391
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A tracked multi-MB bundle outside dist/ or build/ was read whole on every SessionStart and then cut to 64 KB, which can push the map past its 3 s timeout in large repos. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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buildMapnow reads only the first 64 KB of each file through a file descriptor, instead of reading the whole file and slicing it. The result is the same: names in the head are listed and anything past 64 KB was already cut.Added a case to
tests/map.test.js: a 70 KB file whose head export is listed and whose tail export is not.npm test,check-rule-copiesandcheck-versionspass. The only failure is the pandas CSV case, which fails because pandas isn't installed locally, same as onmain.Fixes #1390
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