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+---
+type: amend-message
+---
+feat: add `blas/ext/base/sindex-of-falsy`
+
+PR-URL: https://github.com/stdlib-js/stdlib/pull/12975
+Reviewed-by: Athan Reines <kgryte@gmail.com>
+Signed-off-by: Athan Reines <kgryte@gmail.com>
+Closes: https://github.com/stdlib-js/metr-issue-tracker/issues/840