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Hack Standard Library - Experimental

JSON →
library 4.108.0 ·php
✓ verified Jun 19, 2026
utility

The Hack Standard Library - Experimental Additions

Resources

githubgithub.com/hhvm/hsl-experimental ↗
homepagegithub.com/hhvm/hsl-experimental ↗

API endpoints

full doc /v1/registry/hhvm-hsl-experimental
install /v1/registry/hhvm-hsl-experimental/install