Cosine CLI — Your coding agent in the terminal

Four Modes.
For Every Kind of Work.

From scoping work to autonomous execution, you can choose how much oversight you want and switch modes as the task evolves.

Auto

Reads, writes, runs, and iterates without stopping. Set the task and walk away.

Plan

Research broad changes before committing to edits or execution.

Swarm

Split bigger efforts into coordinated agent workstreams without losing context.

Manual

Asks before making changes. You stay in control.

Built for how you actually work

turn 1 2m ago

Add auth middleware

turn 2 1m ago

Update user schema

turn 3 now

Fix token refresh bug

undo turn

ctrl+z

Checkpointing

Every agent turn is a lightweight git commit. Undo any change instantly — nothing is permanent until you say it is.

task list

Scaffold auth module

Write login endpoint

Add JWT middleware running

Write tests

Update docs

Todo Tracking

Cosine builds and maintains a live task list for every complex job. Watch items tick from pending to done in real time.

stack Next.js + Postgres + tRPC

test runner Vitest — run with pnpm test

migrations Always use Drizzle, never raw SQL

auth JWT stored in httpOnly cookie

persists across sessions

Memory

Project conventions, architecture decisions, and hard-won context persist across sessions. You never repeat yourself.

cos

Gi

GitHub

Po

Postgres

Sl

Slack

Fi

Files

Li

Linear

Cu

Custom

MCP

Connect any external tool — GitHub, databases, Slack, file systems — via Model Context Protocol. Cosine calls them on your behalf.

1import { AuthService } from './auth'

2

3const token = auth.getToken()

4

5if (!token) throw new Error()

LSP

Auto-installed language servers give Cosine IDE-grade intelligence — go-to-definition, find references, rename, and live diagnostics.

orchestrator planning

worker 1

auth module

done

worker 2

api routes

running

worker 3

tests

queued

Sub-agents

In Swarm mode an orchestrator spawns specialized child agents that work in parallel — breaking down the task and executing simultaneously.

Remote Agents

Your TUI stays local while the agent runs in a Cosine cloud workspace. Stream tool calls and file edits back to your terminal in real time.

local

$ cos start --remote

◆ connected

streaming...

cosine cloud

reading files...

✓ edit auth.ts

✓ run tests

→ fix lint errors

Your choice of intelligence

20+ frontier models. One interface. The model is the engine. The product is the car.
Change models mid-conversation. Use the right brain for the right job.

Codex 5.3 1x

GPT 5.5 2x

GPT 5.4 1x

GPT 5.4 1M 1.5x

Lumen Scout 0.1x

Haiku 4.5 0.25x

Sonnet 4.6 2x

Sonnet 4.6 1M 4x

Opus 4.6 3x

Opus 4.6 1M 4.5x

Gemini 3.1 Flash Lite 0.25x

Gemini 3.1 Pro 1x

Gemini 3 Flash 0.25x

Kimi K2.5 0.5x

MiniMax M2.7 0.5x

Qwen 3.6 Plus 0.5x

GLM 5.1 0.25x

Nemotron 3 Super 0.5x

Connect Cosine
to everything.

Over 1,000 MCP servers available — GitHub, Slack, Jira, Linear, PostgreSQL, Stripe, and more. Connect your entire stack to Cosine with a single config file. New integrations added every week.

MCP docs

CLI

you are here

Terminal-native · scriptable · composable

Desktop

Multi-window · active work · platform-connected

Cloud

Remote agents · parallel execution · cross-device

One account · one toolchain · no migration
Move between surfaces any time

Start local. Scale when you're ready.

Cosine is one product across three surfaces: CLI, Desktop, and Cloud. Each extends the last — nothing is thrown away when you go further.

The desktop is the hub. When you want to run tasks overnight, spin up 20 agents in parallel, or keep working from your phone while your laptop runs a long job — the cloud is already connected. Same account, same context, no migration.

→
CLI for terminal-native power users and scripting
→
Desktop for rich interaction, multi-window, visibility
→
Cloud for parallel agents, remote execution, cross-device continuity
→
All three share the same account and model settings

Explore the cloud

Your coding agent.