Tidewave Web: in-browser coding agent for Phoenix (and LiveView)

I tested it and it’s fantastic, I hope to use it more in the future, but I confess that paying for another paid service in dollars while earning in reais makes me take a deep breath, but it’s very much worth it.

Congratulations on the launch!

Since I assume some (many?) of us are already using monthly subscriptions like Claude Code Pro/Max, I’m wondering how hard would it be to use Tidewave Web with Claude Code SDK?

I will be happy to pay Tidewave subscription, but paying for all the extra Anthropic tokens while I already have CC would be tough.

Same here. However once openrouter support is in place for models like kimi2 or qwen3 I am ready to jump on.

I know opencode supports using cc login, but I suspect that is reverse engineered and outside ToS

Very interesting. we have @chrismccord launching https://phoenix.new a few weeks back and now @josevalim launching https://tidewave.ai. I am reasonably sure, both approaches use GitHub - tidewave-ai/tidewave_phoenix: Tidewave for Phoenix · GitHub under the hood. First, these two dabbling their hands at this means two things.

1. Agentic coding is going to be a real thing.
2. Elixir is somehow more suited to this than many other languages.
   I have been contemplating for sometime now what makes a good agent. What is the best way to make the agentic coding optimal. When we say optimal agentic coding optimal, we again mean these things:
3. Generate correct code.
4. Use optimal number of tokens.
5. Generate code by keeping the current project in mind - not some generic patterns.
6. Optimal edits.
   For attaining these things essentially improvements can come in two directions:
7. How to prepare better context - so that agent can send the optimal prompt to LLM.
8. How to reduce the plies/turns between agent and human interaction cycles.
   Now, step 1 - providing better context is done by the open sourced GitHub - tidewave-ai/tidewave_phoenix: Tidewave for Phoenix · GitHub
   For step 2 - providing a browser to be aware of what is happening - that is where both tidewave and phoenix.new are coming up with their own takes. It is more like some playwright integration into the agent - for reducing turns between agent and human interaction cycles.
   I believe efforts in these two areas will keep on easing the developer pain - and are mandatory for vibe coding to morph into real coding.
   The inbuilt AST of Elixir, very stable patterns in coding, the functional nature combined together place Elixir, Phoenix and LiveView with a distinct advantage in building real time applications in the Agentic Era.
   Exciting times ahead.

If you are paying for Pro/Max, please reach out to Claude and let them know you would like to use your Claude Pro/Max subscription with other coding services like Tidewave. Unfortunately we can’t use the Claude Pro/Max APIs according to their ToS.

After upgrading to 0.4 the /tidewave/mcp endpoint no longer works?

v0.4 updated the protocol to streaming http. So make sure your editor supports it and you update the MCP-proxy, if you’re using one.

For me this means:

claude mcp remove tidewave
claude mcp add --transport http tidewave http://127.0.0.1:4000/tidewave/mcp

Thanks @josevalim

I’m already subscribed, and my experience so far has been amazing!! Adding new features has never been this easy—thank you so much for the work you’ve put into this!!! My congratulations!!

I am actually blown away by this. I have been using Elixir since early 2017 and since around phoenix 1.2. I retired around 2018 and since then haven’t worked in a professional setting or with other developers so keeping up with things became more difficult than when I had a job as a Rails dev. The last few years I have been making phoenix apps by myself for people mostly through word of mouth, but once vibe coding really became a thing I kind of ignored it because I was already in my groove. This is my first taste of ai mixed in with the development beyond asking Claude quesitons, and I think I got 3 weeks worth of work done on an app last night alone. This thing is coo!