feat(assert-never): add assertNever helper for exhaustive switch/case - #5
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Provides a typed helper for the default branch of switch/case statements over union types, throwing at runtime and failing compilation if a case is missed. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Summary
assertNever, a helper for thedefaultbranch ofswitch/casestatements over union types — it only acceptsnever, so TypeScript flags a missing case at compile time, and it throws aTypeErrorat runtime if reached.@peerigon/typescript-toolkit/assert-never) with its own README, size-limit entry (200 B brotli), and unit tests.README.mdutilities table andpackage.json/jsr.jsonexports accordingly.Test plan
npm test(format, lint, types, unit tests) passesnpx size-limitpasses for the new sub-package🤖 Generated with Claude Code