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Jcode launch: what they're building and where to launch next

FoxPlug writes launch posts from what a startup ships and matches it to the launch communities that fit it. This page shows what Jcode is building and where it could launch next; if it is your startup, start free below.

What they're building

The harness company

Batch
Y Combinator Summer 2026
Industry
Consumer
Team size
1
Based
San Francisco, CA, USA

Founders

jcode.sh ↗

See their funding details ↗

Jcode on the record

What they shipped

  • From its YC profile: An agent is LLM + harness: We work purely on that second component. We do research to produce the most capable harness. Our harness has 18k stars on github (source)
  • Its own site describes it as: "jcode is an open-source AI coding agent for the terminal, written in Rust. Durable memory, background tasks, and agent swarms, installed with one command." (source)

Who is behind it

  • Jeremy Huang, Founder/CEO: hacked github top 500 monkey type https://github.com/1jehuang age 21 (source)

Code

  • GitHub user 1jehuang: 40 public repositories, 21149 stars in total, mostly Rust; most starred is jcode (19195 stars, Rust); last push 2026-09-06 (read 2026-09-06). (source)

Timeline

  1. 2026: founded, per its YC profile. (source)

Other Consumer launches on FoxPlug

  • Quippy: Helps build social skills through daily practice
  • Result: Where new internet entrepreneurs build and run their companies
  • Roma: The AI task app that gets to work for you.

Where else to launch Jcode

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Featured on FoxPlug: Jcode