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Metis Agent, open source, that boosts coding performance by 50%

Metis, an open-source coding agent released by developer Wholiver, claims to boost coding performance by 50%, solving 73 of 89 tasks (82.02%) on Terminal-Bench 2.1 using DeepSeek V4 Flash, compared to OpenCode's 60 tasks (67.42%), a 14.6% improvement. The agent features recursive multi-agent delegation, SQLite memory, and verification gates, and is available under an MIT license with a free desktop app and CLI.

read3 min views2 publishedAug 29, 2026
Metis Agent, open source, that boosts coding performance by 50%
Image: Michielbdejong (auto-discovered)

English · 简体中文

A coding agent that searches, remembers, executes, and verifies across terminal and desktop.

Quick start · Benchmark & Comparison · Key features · Documentation

Standalone application with built-in Metis CLI and Server runtime (no Node.js required):

macOS (Apple Silicon): DownloadMetis-*-macos-arm64.dmg

from thelatest GitHub Releaseand drag toApplications.** Windows (x64)**: DownloadMetis-*-win-x64-setup.exe

or.zip

from thelatest GitHub Release.

CLI installation

Requires Node.js >=22.19.0

.

npm install -g @wholiver_hu/metis
metis

Run in any repository or directory:

metis "Explain this repository"
metis @src/main.ts "Review this file"
git diff | metis -p "Review this diff"

Use /login

for subscription providers or configure an API key. See Quickstart for the complete guide.

In a controlled benchmark run using the same model (DeepSeek V4 Flash), same 89 real-world tasks, identical budget, and environment:

Agent Framework Model Benchmark Solved (Accuracy) Architecture & Harness Advantage
🏆 Metis
DeepSeek V4 Flash Terminal-Bench 2.1 (89 tasks) 73 / 89 (82.02%)
✅ Recursive 5-role agents + SQLite memory + Plan/Build
OpenCode
DeepSeek V4 Flash Terminal-Bench 2.1 (89 tasks) 60 / 89 (67.42%)
📈 Improvement
Same Model & Budget
Same Environment
+14.6% (+13 tasks)
🚀 Harness, memory, and verification gates alone
Capability Metis Claude Code OpenCode Cursor / Cline
License & Pricing
✅ MIT ($0 Free)
❌ Proprietary ✅ MIT ($0 Free)
Model Freedom
✅ Any Model / OrcaRouter
❌ Anthropic Only ✅ Multi-Provider
User Interfaces
✅ TUI + React Desktop
Workflow Mode
✅ Plan ↔ Build Dual-Mode
Multi-Agent System
✅ Recursive L0→L4 (5 Roles)
❌ None
Durable Memory
✅ SQLite + Vector Search
❌ Ephemeral ❌ Ephemeral
Verification Gates
✅ Test Gates + Video Evidence
Headless Benchmark
✅ Python Adapter + Trace
❌ None ❌ None

Plan & Build Dual Workflows— Safely investigate in read-only Plan mode, then execute approved plans with a live-updating checklist in Build mode.** Dual Interface for Terminal & Desktop**— Work directly in your terminal via the rich interactive TUI, or use the dedicated React/Vite Desktop workspace on macOS and Windows.Recursive Multi-Agent System— Native named agents (coordinator

,planner

,implementer

,reviewer

,verifier

) with L0→L4 recursive delegation and Git Worktree isolation.Durable Memory & Resumable Sessions— Project knowledge and decisions persist in SQLite across restarts, context compactions, and session forks.** Extensible & Model-Agnostic**— Use any LLM provider (OpenAI, Anthropic, DeepSeek, OrcaRouter, Gemini, Groq, Ollama, vLLM) and extend with TypeScript plugins, Agent Skills, and MCP.Benchmark-Grade Reliability— Automated verification gates, video evidence inspection, and full Terminal-Bench & Harbor evaluation readiness.

Topic Guide
Install, authenticate, and start

Using Metis·TUIProviders·Custom models·Custom providersNamed Agents & DelegationTerminalBench & HarborSessions·CompactionExtensions·Skills·PackagesPrompt templates·Themes·KeybindingsSDK·RPC·JSONVideo toolSecurity·SettingsWindows·Termux·tmux·ContainersSee the documentation index for every guide.

Developer information

npm run build                 # Compile TypeScript and copy runtime assets
npm test                      # Run the Vitest suite
npm run clean                 # Remove compiled output
npm run build:binary          # Build the standalone binary
npm --prefix desktop run dev  # Start the React/Vite Desktop app in development
npm --prefix desktop run build # Build the renderer and Electron artifact

The package exports the Node.js SDK from @wholiver_hu/metis

and the RPC entry point from @wholiver_hu/metis/rpc-entry

.

Contributions are welcome. See CONTRIBUTING.md for development, Extension and Package integration, testing, and AI-assisted contribution guidance.

Distributed under the MIT License.

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