Normal Mode
One agent on one task.
Hand over a bug fix, a refactor, or a feature you can describe in a paragraph, and get a branch back.
How sessions workDev404 is the ambitious AI CTO for your ambitious ideas.
How it works
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1
Connect a repository
Link a GitHub or GitLab project. Dev404 reads the codebase and follows the conventions already in it.
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2
Approve the plan
Before any code is written, you see which files will change, in what order, and how the result will be checked.
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3
Review the branch
You get the diff, the test results, and a plain note on anything still at risk. Merging is your call.
Three modes, picked by the size of the job
Ultra Code
A team of agents for the hard problems.
Specialists split the work, each in its own virtual machine, and coordinate in a shared channel. A separate agent reviews the result.
How subagents workFullstack Mode
Start from an idea, not a codebase.
Describe what you want to build. Dev404 builds the full stack in a real repository you can take over at any time.
Building and hostingForge
Frontier intelligence at a fraction of the cost.
Forge combines the reasoning and problem solving capabilities of frontier models with faster, more cost efficient execution. Built to handle complex engineering tasks while keeping costs significantly lower.
You decide what ships
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The run doesn’t need your laptop
Work happens in the cloud. Close the tab and come back when it’s done.
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Every task gets its own branch
Nothing reaches your main branch until you merge it.
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Reviewed before you see it
A separate agent reviews the change and reruns the checks.
Dev404 IDE Beta
The same agents in your editor, next to your local code.
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Ultra Code, locally
Run a team of agents on the project that’s on your machine.
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Send to Cloud
Move a session to the cloud in one click, so it keeps going after your laptop closes.
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Live Code
You, your teammates, and the agents edit the same files in one live session.