Phoenix dependency: I mentioned Phoenix as a dependency because some developers prefer other backend solutions like Ash Framework or Commanded (for CQRS/Event

Phoenix dependency: I mentioned Phoenix as a dependency because some developers prefer other backend solutions like Ash Framework or Commanded (for CQRS/Event Sourcing), or may want to use Hologram with their existing non-Phoenix backends. While Phoenix is currently a great foundation for Hologram (providing battle-tested HTTP, WebSocket, and PubSub capabilities), the long-term vision is to potentially make Hologram self-sufficient. This would give developers maximum flexibility in choosing their backend architecture. That said, Phoenix remains an excellent choice and most Elixir web developers are already using it, making Hologram easy to adopt incrementally in existing Phoenix applications. Elixir syntax coverage: You are right, this shouldn't be an issue in practice due to Hologram's action/command distinction. Actions are meant for UI state updates and triggering commands, while commands handle things like database access, file I/O, and OS operations on the server side. We're actually quite close to 100% Elixir syntax compatibility. Process-related functionality isn't implemented yet, but the plan is to handle it initially using microtasks and Promises to provide semantically equivalent behavior and eventually use Web Workers for real parallelism. The key is that actions should remain focused on UI concerns, while commands handle the heavy lifting on the server side. This natural separation means you rarely encounter compatibility edge cases in practice. > In the JS console? Like at runtime? I don't just get them as build errors? Currently, syntax checks happen at runtime because Hologram doesn't perform dead code elimination for unused function heads. This means that even if your action code is valid, there might be unused function clauses in the same function that contain syntax we haven't implemented yet. Even if your code only calls one specific function head, all other heads of that function would still be included in the transpiled JavaScript.