143.dev – we open-sourced our internal coding-agent infrastructure
We just open-sourced the internal system we built at Assembled for running coding agents as a team. Coding agents worked well for individual engineers, but the surrounding workflow was a bit of a mess. We generally found that many engineers had different MCP connections and context for their agents, personal automations running that other people couldn’t access, and very little introspection for what a human’s input into the coding agent looked like. So we built an internal system that converted coding agents into shared team infrastructure. The system runs Codex, Claude Code, OpenCode, and…
143.dev – we open-sourced our internal coding-agent infrastructure launched on June 30, 2026 with 13 votes, #1,084 of 22,647 launches that month and more than 90% of that year's launches.
In plain words
143.dev is an open-source platform for running coding agents as shared team infrastructure. Built by Assembled, it addresses workflow challenges when multiple engineers use coding agents individually by providing centralized management of agent connections, context, and automations. The system supports multiple agent types including Claude Code, Codex, and OpenCode, running them in gVisor sandboxes for security. It allows teams to mix different agents to balance cost and performance, and integrates with tools like GitHub.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
We just open-sourced the internal system we built at Assembled for running coding agents as a team. Coding agents worked well for individual engineers, but the surrounding workflow was a bit of a mess. We generally found that many engineers had different MCP connections and context for their agents, personal…
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