PJUllrich
Author of Building Table Views with Phoenix LiveView
A Devcontainer for Elixir
I built a devcontainer that makes it safe(-er) to run Claude Code in YOLO mode (--dangerously-skip-permissions) on Elixir&Phoenix projects and it comes with Tidewave built-in. It’s based on Anthropic’s reference but made safer and tailored to Elixir.
The container makes it safe(-er) to run Claude with --dangerously-skip-permissions by:
- Restricting all outbound traffic to a domain allowlist via a strict network firewall using the battle-tested Squid proxy
- Hiding sensitive files (e.g.
.env) from Claude using file permissions, with Claude deny rules as a secondary safeguard.- These files and folders are simply empty in your devcontainer. No more uploading
.envfiles to Claude by accident!
- These files and folders are simply empty in your devcontainer. No more uploading
- Isolating Claude state in a per-project
.claudefolder, separate from your host’s~/.claude
It has a few quality-of-life features as well, like:
- a Makefile with extensive commands to control the devcontainer (e.g.
make dc.up|down|rebuild) and to start services in it (e.g.make dc.tidewave|server|claude) - Git and Git Worktree support, so you can run multiple Claude Code instances in parallel in the same container
- Oh-my-Zsh with git status, tab completion, and fancy colors
Try it out here:
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