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Why One Developer Runs Coding Agents Inside Devcontainers

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The author does nearly all development inside a devcontainer, including recording a demo GIF with Claude Code. Running an agent in a container keeps it away from browser sessions and API keys and stops experimental tools from reaching the host, which makes auto mode safer to use. Named volumes separate the environment that reads code from the one that writes it, a split the author is testing with an OpenSpec setup. The author points out that devcontainers take detailed tuning and are not for everyone, though agents can handle configuration fixes. The approach trades some convenience, such as needing to rebuild containers after config changes, for tighter control over what an agent can touch.

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Why One Developer Runs Coding Agents Inside Devcontainers · ShortSingh