Wanted to share a project I've been building called LuaDB: a lightweight, zero-dependency embeddable database system written in pure Lua.

Why pure Lua? Cross-platform embedding without needing C bindings or compiling native SQLite shared libraries (great for LÖVE, Roblox, OpenResty, or embedded devices).

What it includes:

Full B+Tree index engine on 4KB slotted binary pages
Write-Ahead Logging (BEGIN, COMMIT, ROLLBACK)
Native PostgreSQL wire protocol gateway (run luajit bin/luadb_server.lua and connect with psql)
Native JSONB operators (details->'address'->>'city')
Foreign Keys with ON DELETE CASCADE and ALTER TABLE migrations
Master-master cluster replication with hinted handoff
Check out the GitHub repo: https://github.com/jncastilho/luadb

Would love to hear your thoughts and feedback!