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yash vs Oils: catalog facts
yash	Oils
Best for: Users who want a POSIX-compliant shell for portable scripting and daily use	Best for: Shell script authors who want a stricter bash or a more modern shell language
Free Free and open source.	Free Free and open source.
macOS, Linux, Command line	macOS, Linux, Command line
Close adherence to the POSIX shell standard Interactive line editing All 3 strengths for yash Close adherence to the POSIX shell standard Interactive line editing Useful for testing portable shell scripts	OSH runs existing bash scripts with stricter error checking YSH adds structured data and JSON support All 4 strengths for Oils OSH runs existing bash scripts with stricter error checking YSH adds structured data and JSON support Both shells in one small binary Detailed reference documentation
Smaller ecosystem of plugins and configurations than bash or zsh Not a terminal emulator; it runs inside one	Still before a 1.0 release YSH is a new language to learn
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for yash github.com/magicant/yash Catalog checked October 2, 2026	Official website Full listing and sources Sources for Oils oils.pub Catalog checked September 24, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.