Overview

The AI Coding Agent
for Your Codebase

Describe a feature or fix in plain language. Assumer reads your repo, plans the change, edits files across the project, runs your tests and shows you the diff to review.

Start Building Watch Demo
New Session

Add an analytics dashboard with user management and billing to our Next.js app.

Assumer is planning...

Dashboard

Total Users
12,540
12.3%
Revenue
$45,231
8.7%
Overview
20K 15K 10K 5K 0
MonTueWedThuFriSatSun
Recent Users
Olivia
Olivia Rhye
olivia@example.com
Admin
Phoenix
Phoenix Baker
phoenix@example.com
Member
Lana
Lana Steiner
lana@example.com
Member

What Is Assumer?

Assumer is an AI coding agent for your terminal and desktop, built by 4Born Solutions on OpenCode. It works inside your existing codebase: it reads the repo, plans changes, edits files, runs commands and tests, and shows diffs for you to review.

Agentic

Reads, plans, edits and tests in your repo

Full-Stack

Frontend, backend, tests, configs and scripts

You Stay in Control

Allow, ask or deny per tool and command

Ships Your Way

Commit, open a PR and deploy as usual

Why Assumer?

A coding agent that fits how you already work: your terminal, your editor, your repo and your pipeline.

Prompt to Diff

Go from a prompt to a reviewable diff in one session

Easy to Start

npm install, assumer login, then run assumer

Build & Plan Agents

Press Tab to switch between editing and read-only planning

Extensible

Add MCP servers, skills and custom agents

Build Flow

From a prompt to a merged change. This is how Assumer works.

Prompt

Describe the feature or fix in plain language.

Build

Assumer plans, edits files across your repo and runs your tests.

Ship

Review the diff, commit, open a PR and deploy with your existing pipeline.