jcode
★ 21.3k
vs
pi-from-scratch
★ 1.3k
jcode vs pi-from-scratch
jcode: jcode is a coding agent harness written in Rust, built to run dozens of agents in parallel with little RAM and near-instant startup. Agents in the same repo are coordinated by a server that notifies them of conflicting edits and lets them message each other or spawn their own swarms.; pi-from-scratch: PI from Scratch is a Chinese-language article that rebuilds a minimal version of the pi coding agent, called nano-pi, in TypeScript. The companion site fills in the code alongside the text and offers a step-through trace of the execution flow.
01
TL;DR
jcodeCode Assistant · ★ 21.3k
Run many coding agents in parallel on one machine
pi-from-scratchCode Assistant · ★ 1.3k
Learn how a coding agent's tool loop works internally
02
Side-by-Side Comparison
Field
jcodepi-from-scratchCategory
Code Assistant
Code Assistant
Stars
★ 21.3k
★ 1.3k
License
MIT
MIT
Install Command
curl -fsSL https://jcode.sh/install | bash
npm install && npm run dev
Updated
1d ago
4d ago
Open Source
Yes
Yes
Tags
coding-agent, rust, cli
coding-agent, tutorial, typescript
03
Features
jcode01About 3.3 MB of RAM per additional headless session in the project's benchmark
02Swarm mode with edit notifications and agent-to-agent messaging
03Agents can spawn their own teammates as workers
04Claude OAuth, OpenAI Codex OAuth and other providers
05Self-dev mode where the agent edits, builds and reloads its own binary
pi-from-scratch01Step-by-step article that builds a working coding agent from zero
02Website shows code completing in an editor as you read
03Trace view to step through the agent's execution line by line
04nano-pi runs against any OpenAI-compatible API
04
Use Cases
jcode↳Run many coding agents in parallel on one machine
↳Let several agents work in one repository without clobbering each other
↳Customize a coding agent by having it modify its own source
pi-from-scratch↳Learn how a coding agent's tool loop works internally
↳Use nano-pi as a small base for your own agent experiments
↳Prepare to read the full pi codebase
05
Best For
jcodeMost Popular
pi-from-scratch—
FAQ
FAQ
What is the difference between jcode and pi-from-scratch?
Both jcode and pi-from-scratch are in the Code Assistant category. jcode has 21.3k stars, while pi-from-scratch has 1.3k stars.
Which is better, jcode or pi-from-scratch?
The best choice depends on your use case. Choose jcode if Run many coding agents in parallel on one machine, and pi-from-scratch if Learn how a coding agent's tool loop works internally.
Is jcode free or open source?
Yes, jcode is open source on GitHub (MIT).
Is pi-from-scratch free or open source?
Yes, pi-from-scratch is open source on GitHub (MIT).
Cloud Infrastructure
AdDeploy on DigitalOcean
Host your MCP servers, Docker containers, and AI agents with $200 free credit over 60 days.
→