It's publicly available in the GitHub repository and if you run "bun upgrade --canary" - https://github.com/oven-sh/bun/releases/tag/canary

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jdiff a day ago | parent [-]

That commit (and main) still purports to be 1.3.14, the version numbers haven't changed. Does that not still suggest Anthropic is using something else?

	▲	simonw a day ago \| parent [-]
		I think Bun/Anthropic should document which commit hash their "1.4" as shipped in Claude Code uses.