Keystone
We kept hitting the same wall: you clone some arbitrary repo and just want it to run without any configuration work. So we built Keystone, an open source tool that spins up a Modal sandbox, runs Claude Code inside it, and produces a working .devcontainer/ config (Dockerfile, devcontainer.json, test runner) for any git repo. We build on the dev container standard, so the output works with VS Code and GitHub Codespaces out of the box. Main use cases: reproducible dev/CI environments, self-describing repos, and safely sandboxed coding agents. Our goal is to encourage all repos to…
Keystone launched on March 25, 2026 with 125 votes, #320 of 23,380 launches that month and more than 95% of that year's launches.
In plain words
Keystone is an open-source tool that automatically generates Docker and dev container configurations for any Git repository. It uses Claude Code running in a sandboxed Modal environment to analyze a repo and produce a working Dockerfile, devcontainer.json, and test runner compatible with VS Code and GitHub Codespaces. The tool is designed for developers who want reproducible development environments and self-describing repositories without manual configuration work.
written from the facts on this page · September 2026
From the sources
Keystone self-configures a working devcontainer for any git repo, all on its own. Give it a repo. Get back a Dockerfile, devcontainer.json, and a passing test runner. It runs a coding agent inside a sandboxed Modal environment so your machine is never touched. It’s open-source, works with Claude Code and Codex, and the dev containers it produces work in VS Code and GitHub Codespaces. pip install imbue-keystone
An agentic tool to configure Dockerfiles for any repo - imbue-ai/keystone
In the maker’s words, at launch
We kept hitting the same wall: you clone some arbitrary repo and just want it to run without any configuration work. So we built Keystone, an open source tool that spins up a Modal sandbox, runs Claude Code inside it, and produces a working .devcontainer/ config (Dockerfile, devcontainer.json, test runner) for…
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Keystone – building self-configuring agentsMar 2026 · imbue.com · ▲5When cloning a repo, we kept hitting the same wall: no Dockerfile, no dev container, no clear path to running it. Asking an agent to fix it directly on your system is risky, as it can clear Docker config, change kernel settings, downgrade packages without warning. Keystone runs the agent inside a Modal sandbox with its own Docker daemon. It iterates until tests pass, then hands you a .devcontainer/ you can just check in. Now your repo knows how to run itself!
Flox2024 · flox.dev · ▲375Hey Everyone! Ron here, part of the NixOS Foundation and building Flox. Just coming out of this years NixCon and pretty excited to show hn below :) As of today, NVIDIA officially recognizes Canonical, SUSE, CIQ, and Nix—via Flox—as supported distributors for CUDA. Full blog - https://developer.nvidia.com/blog/developers-can-now-get-cud... This is a huge win for the Nix community. For years, CUDA on Nix was possible but painful—builds could take hours, and redistributing prebuilt binaries was blocked by NVIDIA's licensing requirements. NVIDIA's growing engagement with key…
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