Hybrid polyglot testkit: Go CLI bridge + wrapper smoke tests #39

Job	Run time
test (stable)	27s
spec-kit-conformance	42s
wrapper-cross-platform (ubuntu-latest)	40s
wrapper-cross-platform (macos-latest)	41s
test (1.22.x)	17s
wrapper-cross-platform (windows-latest)	2m 44s
	5m 31s

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