AI Build

Build Features in Your Codebase with Natural Language

Describe what you want, and Assumer builds it in your repo. It doesn't guess at your code; it reads the project, plans the change, edits files, runs your tests and shows you the diff.

Assumer

What do you want to build?

Describe the feature in plain language...

Add teams, projects, tasks, time tracking and billing to our Next.js app.

Enhance prompt
0/500
N
Next.js
TS
TypeScript
Tailwind CSS
PostgreSQL
JS
Node.js

Context-Aware Edits

Ask to "extract this into a hook" or "match the error handling in payments", and Assumer follows your code's patterns.

Terminal, Browser or Editor

Use the CLI, the browser UI with assumer web, or editors like Zed through ACP.

Reviewable Diffs

See every change as a diff while you chat. Use /undo to revert anything you don't want.

"Make the hero section cleaner and add a primary CTA for signup."

Done. I updated Hero.tsx: simpler typography, more whitespace and a high-contrast 'Start Now' button linked to /signup.

>npm run build
type-checking project...
compiling routes...
Step 1: Types checked (2.1s)
Step 2: Tests passed (4.3s)
Step 3: Production build (8.2s)
Build complete. Ready to commit.

Works With Your Stack

Assumer isn't a site generator. It works inside the project you already have, whether that's Next.js and PostgreSQL, Django or Go, and follows the conventions it finds in your repo

Reads Before It Writes

Explores the repo with grep, glob and LSP before editing, so changes fit your existing code

Checks Its Own Work

Runs your type checker, tests and formatter (Prettier, Biome, Ruff) after making changes.

Explore Features in Depth

Detailed guides on each Assumer capability

Build & Plan Agents

Edit with full tools, or analyze read-only before you change anything.

Spec-Driven Development

Go from constitution to spec, plan, tasks and implementation.

Your Code, Your Repo

Every change lives in your repository. There is nothing to export.

GitHub Integration

Install the GitHub app and work on PRs with assumer pr

MCP Servers

Connect databases, docs and internal tools over MCP

Rules & Skills

Teach Assumer your conventions with Assumer.md and SKILL.md.

Built-In Git & GitHub Integration

Assumer works in your Git repo, so every change is a diff you can review, commit and push. Use /undo and /redo to revert or re-apply the agent's changes

Review, Undo, Redo

Every change is a diff. Review it, then keep it, or revert it with /undo without leaving the session

Commit and Open PRs

Push to any repo, personal or org, new or existing. Your team keeps using PRs, code reviews and branches as usual

CI/CD Pipeline Triggers

Pushes run through your CI/CD (e.g. Vercel, Netlify, GitHub Actions or Cloudflare Pages). Your existing deployment setup just works

Git workflow
Committed to Git (after review)
+ Updated src/components/Hero.tsx
+ Added app/signup/page.tsx
+ Modified app/layout.tsx
Pushed to GitHub (git push)
→ your-org/your-app:main
CI/CD deploy triggered (e.g. Vercel)

Build features in your codebase from a single prompt

Start Building Watch Demo