True composability is not possible without open source, the practice of making code freely available and able to redistribute and modify it at will. Regardless of degree or kind, open source as a principle is so important to metaverse development that we have broken it down as a separate component, albeit one that overlaps with composability above.So what does open source mean in a metaverse development environment? The best programmers and creators - not platforms - need complete control to fully innovate. Open source and openness help ensure this. When code bases, algorithms, markets, and protocols become transparent public products, builders can pursue their visions and ambitions to build more complex, reliable experiences.The power of composability in Web3 owes much to its open source ethos.