Tidewave

Tidewave is the coding agent for full-stack web app development. Integrate Claude Code, OpenAI Codex, and other agents with your web app and web framework at every layer, from UI to database. See our website for more information.

This project can also be used as a standalone Model Context Protocol server.

Installation

You can install Tidewave by running:

bundle add tidewave --group development

or by manully adding the tidewave gem to the development group in your Gemfile:

gem "tidewave", group: :development

Now make sure Tidewave is installed and you are ready to connect Tidewave to your app.

Troubleshooting

Using multiple hosts/subdomains

If you are using multiple hosts/subdomains during development, you must use *.localhost, as such domains are considered secure by browsers. Additionally, add the following to config/initializers/development.rb:

config.session_store :cookie_store,
  key: "__your_app_session",
  same_site: :none,
  secure: true,
  assume_ssl: true

And make sure you are using rack-session version 2.1.0 or later.

The above will allow your application to run embedded within Tidewave across multiple subdomains, as long as it is using a secure context (such as admin.localhost, www.foobar.localhost, etc).

Content security policy

If you have enabled Content-Security-Policy, Tidewave will automatically enable "unsafe-eval" under script-src in order for contextual browser testing to work correctly. It also disables the frame-ancestors directive.

Production Environment

Tidewave is a powerful tool that can help you develop your web application faster and more efficiently. However, it is important to note that Tidewave is not meant to be used in a production environment.

Tidewave will raise an error if it is used in any environment where code reloading is disabled (which typically includes production).

Configuration

You may configure tidewave using the following syntax:

  config.tidewave.team = { id: "my-company" }

The following config is available:

  • allow_remote_access - Tidewave only allows requests from localhost by default, even if your server listens on other interfaces. If you trust your network and need to access Tidewave from a different machine, this configuration can be set to true

  • logger_middleware - The logger middleware Tidewave should wrap to silence its own logs

  • preferred_orm - which ORM to use, either :active_record (default) or :sequel

  • team - set your Tidewave Team configuration, such as config.tidewave.team = { id: "my-company" }

Available tools

  • execute_sql_query - executes a SQL query within your application database, useful for the agent to verify the result of an action

  • get_docs - get the documentation for a given module/class/method. It consults the exact versions used by the project, ensuring you always get correct information

  • get_logs - reads logs written by the server

  • get_models - lists all modules in the application and their location for quick discovery

  • get_source_location - get the source location for a given module/class/method, so an agent can directly read the source skipping search

  • project_eval - evaluates code within the Rails application itself, giving the agent access to your runtime, dependencies, and in-memory data

Acknowledgements

A thank you to Yorick Jacquin, for creating FastMCP and implementing the initial version of this project.

License

Copyright (c) 2025 Dashbit

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.