kiosk-pow-argon2id

https://github.com/kiosk-hq/kiosk

kiosk-pow-argon2id is the legacy proof-of-work backend for the Kiosk framework: an Argon2id search-form proof of work. The shipped default is Equihash (kiosk-pow-equihash). Argon2id stays a legacy backend because its 64 MiB verify is too expensive for a gateway. Ships the operator-side Ruby verify (one Argon2id evaluation, no loop) and a Python solver (solve.py, argon2-cffi). The Ruby verify and the Python solver produce byte-identical Argon2id digests. The gem's `:parity` spec examples check this, and so does the `rake parity` task. Neither the Rakefile nor spec/ is in the package. Built on kiosk-pow. kiosk-reputation reaches it when a host registers it under "argon2id"; it does not register itself. Does not depend on kiosk-core or Rails: pure Ruby and libargon2 through FFI.