IEUM

IEUM is an open-source coding agent you can use in three places:

• terminal (TUI)
• browser (WEB)
• VS Code (Extension)

It shares one agent core across all three, so your workflow stays consistent.

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At A Glance

Platform	Recommended Use	Runtime
TUI	Local development on your machine	Local
WEB	Centralized team server	Remote
VS Code	Both local and remote workflows	Local / Remote

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What You Get

• One agent core across TUI, WEB, and VS Code
• Tool use with approval flow (HITL)
• Session history and resume support
• Multi-provider LLM support (OpenAI, Anthropic, Ollama, OpenRouter, and more)
• Skill system (built-in + user/project skills)
• MCP integration (including GitHub MCP)
• English and Korean UI

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Quick Start

1) Install

pip install ieum

Or with uv:

uv pip install ieum

2) Run TUI (local)

ieum

3) Run WEB

ieum --web --host 127.0.0.1 --port 8765

Open http://127.0.0.1:8765 and log in with the token printed in the server console.

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Installation

Prerequisites

• Python 3.11+
• ripgrep recommended for fast code search

From Source

git clone https://github.com/DDOK-AI/ieum.git
cd ieum
pip install -e .

Install WEB dependencies:

pip install -e ".[server]"

Install test/dev dependencies:

uv sync --group test

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Configuration

Core Environment Variables

Variable	Default	Purpose
IEUM_LANG	en	UI language (en / ko)
IEUM_AUTH_DISABLED	false	Disable auth (local dev only)
IEUM_AUTH_TOKEN_TTL_SECONDS	3600	Auth token TTL (min 60s)
IEUM_CORS_ORIGINS	localhost-only list	Allowed browser origins
IEUM_REMOTE_ONLY	false	Block loopback-only bind in remote deployments
IEUM_TLS_REQUIRED	false	Require HTTPS/WSS
IEUM_TRUST_PROXY_TLS	false	Trust X-Forwarded-Proto=https from proxy
IEUM_SSL_CERTFILE	unset	TLS cert path (direct TLS termination)
IEUM_SSL_KEYFILE	unset	TLS key path (direct TLS termination)
IEUM_RATE_LIMIT_ENABLED	true	Enable per-IP rate limiting
IEUM_RATE_LIMIT_MAX_REQUESTS	120	Max requests per window
IEUM_RATE_LIMIT_WINDOW_SECONDS	60	Rate limit window
IEUM_SANDBOX_ROOT	unset	Root for <user>/<workspace> sandboxing
IEUM_REQUIRE_USER_ID	false	Require user identity header/query
IEUM_SAFE_MODE	false	Extra command restrictions

LLM Variables (Common)

Provider	Variables
OpenAI	OPENAI_API_KEY, OPENAI_MODEL
Anthropic	ANTHROPIC_API_KEY, ANTHROPIC_MODEL
Ollama	OLLAMA_BASE_URL, OLLAMA_MODEL
OpenRouter	OPENROUTER_API_KEY, OPENROUTER_MODEL
Google	GOOGLE_API_KEY

.env Priority

1. Project .env (current directory)
2. User .env (~/.ieum/.env)
3. System environment

Config Directory

~/.ieum/
  .env
  auth_token
  <agent>/
    AGENTS.md
    skills/

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Usage

TUI (Local)

# interactive
ieum

# use a specific model
ieum --model anthropic/claude-sonnet-4-5-20250929

# resume latest thread
ieum -r

# auto-approve tool calls
ieum --auto-approve

Useful commands in chat:

• /help
• /env
• /model <provider/model>
• /skills
• /threads
• /tokens

WEB (Remote-first)

Local check:

ieum --web --host 127.0.0.1 --port 8765

Remote deployment baseline:

export IEUM_REMOTE_ONLY=true
export IEUM_TLS_REQUIRED=true
export IEUM_TRUST_PROXY_TLS=true
export IEUM_CORS_ORIGINS="https://ieum.example.com"
export IEUM_AUTH_TOKEN_TTL_SECONDS=3600
export IEUM_RATE_LIMIT_ENABLED=true
export IEUM_RATE_LIMIT_MAX_REQUESTS=120
export IEUM_RATE_LIMIT_WINDOW_SECONDS=60
export IEUM_SANDBOX_ROOT="/srv/ieum/sandboxes"
export IEUM_REQUIRE_USER_ID=true

ieum --web --host 0.0.0.0 --port 8765

Notes:

• Wildcard CORS (*) is rejected.
• In required-user mode, send one of:
  • header x-ieum-user-id
  • header x-ieum-user
  • query user_id

VS Code Extension

VS Code supports local, remote, and auto modes.

Key settings:

• ieum.serverMode: local | remote | auto
• ieum.remoteServerUrl
• ieum.authToken
• ieum.serverPort
• ieum.pythonPath

See the documentation for setup and troubleshooting (coming soon).

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Production Checklist (WEB)

Before exposing the server:

1. Set explicit IEUM_CORS_ORIGINS (no *)
2. Enable IEUM_TLS_REQUIRED=true
3. Set token TTL (IEUM_AUTH_TOKEN_TTL_SECONDS)
4. Keep rate limit enabled
5. Set IEUM_SANDBOX_ROOT
6. Enable IEUM_REQUIRE_USER_ID=true for multi-user use

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Architecture

TUI (Textual)     WEB (FastAPI/WS)     VS Code (Extension/WebView)
         \             |                        /
          \            |                       /
                 LangGraph Agent Core
                       |
            Tools (file/shell/search/MCP/skills)

Main code locations:

Area	Path
Agent core	ieum/agent.py
TUI app	ieum/app.py
WEB server	ieum/server/
Sessions/persistence	ieum/sessions.py
Skills	ieum/skills/
VS Code extension	vscode-ieum/

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Development

# tests
python -m pytest -q

# extension build
cd vscode-ieum
npm run compile

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Documentation

Documentation is being prepared. Stay tuned.

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License

MIT