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feat(claude-code): add yoloAlias option (#19)
## Summary - Adds a `yoloAlias` boolean option (default: `false`) to the claude-code feature - When enabled, creates a `yolo` alias that expands to `claude --allow-dangerously-skip-permissions` - Configures the alias for **bash** (`.bashrc`), **zsh** (`.zshrc`), and **fish** (function file at `~/.config/fish/functions/yolo.fish`) ## Test plan - [x] `devcontainer features validate ./src` passes - [x] New `claude_code_yolo_alias` scenario tests pass - [x] Existing claude-code scenarios remain green
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‎src/claude-code/NOTES.md‎

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@@ -13,6 +13,14 @@ By default, the `latest` release channel is installed. You can also specify:
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The channel chosen at install time becomes the default for auto-updates.
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## YOLO Alias
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When `yoloAlias` is set to `true`, a `yolo` shell alias is created that expands to `claude --allow-dangerously-skip-permissions`. The alias is configured for bash, zsh, and fish.
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> **Warning:** `--allow-dangerously-skip-permissions` disables Claude Code's normal permission checks and confirmation prompts for potentially sensitive actions. This meaningfully reduces safety and may allow unintended or unsafe changes, so only enable `yoloAlias` if you understand and accept the security implications.
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>
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> If a `yolo` alias already exists in `.bashrc`/`.zshrc`, or a `yolo.fish` function file already exists, the installer will skip adding it to avoid overwriting your setup.
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## Auto-Updates
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The native binary automatically updates in the background. Update checks are performed on startup and periodically while running. To disable auto-updates, set the `DISABLE_AUTOUPDATER=1` environment variable.

‎src/claude-code/devcontainer-feature.json‎

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{
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"id": "claude-code",
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"version": "2.1.0",
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"version": "2.2.0",
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"name": "Claude Code",
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"description": "Installs Claude Code CLI for AI-powered development assistance",
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"options": {
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"version": {
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"type": "string",
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"default": "latest",
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"description": "Version to install. Use 'latest', 'stable', or a specific semver (e.g. '1.0.58')."
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},
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"yoloAlias": {
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"type": "boolean",
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"default": false,
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"description": "Create a 'yolo' shell alias for 'claude --allow-dangerously-skip-permissions' in bash, zsh, and fish."
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}
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},
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"customizations": {

‎src/claude-code/install.sh‎

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echo "Symlinked claude to /usr/local/bin/claude"
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fi
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# Set up yolo alias if requested
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if [ "${YOLOALIAS:-false}" = "true" ]; then
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echo "Setting up 'yolo' alias..."
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ALIAS_CMD='alias yolo="claude --allow-dangerously-skip-permissions"'
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TARGET_HOME="${INSTALL_HOME}"
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add_shell_alias_if_missing() {
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local rc_file="$1"
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local alias_name="$2"
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local alias_cmd="$3"
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if [ -f "$rc_file" ] && grep -Eq "^[[:space:]]*alias[[:space:]]+${alias_name}=" "$rc_file"; then
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echo "Skipping $rc_file: alias '$alias_name' already exists."
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return 0
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fi
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touch "$rc_file"
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# Ensure the file ends with a newline before appending
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if [ -s "$rc_file" ] && [ "$(tail -c 1 "$rc_file" | wc -l)" -eq 0 ]; then
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printf '\n' >> "$rc_file"
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fi
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printf '%s\n' "$alias_cmd" >> "$rc_file"
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}
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# bash
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add_shell_alias_if_missing "$TARGET_HOME/.bashrc" "yolo" "$ALIAS_CMD"
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# zsh
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add_shell_alias_if_missing "$TARGET_HOME/.zshrc" "yolo" "$ALIAS_CMD"
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# fish — create a function file (idiomatic for fish)
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FISH_FUNC_DIR="$TARGET_HOME/.config/fish/functions"
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FISH_FUNC_FILE="$FISH_FUNC_DIR/yolo.fish"
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FISH_CREATED=false
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if [ -f "$FISH_FUNC_FILE" ]; then
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echo "Skipping $FISH_FUNC_FILE: function already exists."
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else
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mkdir -p "$FISH_FUNC_DIR"
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cat > "$FISH_FUNC_FILE" << 'FISHEOF'
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function yolo --description "claude --allow-dangerously-skip-permissions"
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claude --allow-dangerously-skip-permissions $argv
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end
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FISHEOF
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FISH_CREATED=true
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fi
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# Fix ownership if installing for non-root user
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if [ -n "$_REMOTE_USER" ] && [ "$_REMOTE_USER" != "root" ]; then
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chown "$_REMOTE_USER" "$TARGET_HOME/.bashrc" "$TARGET_HOME/.zshrc"
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if [ "$FISH_CREATED" = true ]; then
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chown "$_REMOTE_USER" "$TARGET_HOME/.config" "$TARGET_HOME/.config/fish" "$FISH_FUNC_DIR" "$FISH_FUNC_FILE"
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fi
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fi
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echo "yolo alias configured for bash, zsh, and fish."
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fi
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echo "Claude Code installed successfully!"

‎test/claude-code/claude_code_yolo_alias.sh‎

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#!/bin/bash
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# This test file will be executed against the 'claude_code_yolo_alias' scenario
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# to verify that the yolo alias is properly configured.
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set -e
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# Import test library bundled with the devcontainer CLI
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source dev-container-features-test-lib
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# Feature-specific tests
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check "claude command available" which claude
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check "yolo alias in bashrc" bash -c "grep -Fq 'claude --allow-dangerously-skip-permissions' ~/.bashrc"
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check "yolo alias in zshrc" bash -c "grep -Fq 'claude --allow-dangerously-skip-permissions' ~/.zshrc"
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check "fish yolo function body" bash -c "test -f ~/.config/fish/functions/yolo.fish && grep -Fq 'claude --allow-dangerously-skip-permissions' ~/.config/fish/functions/yolo.fish"
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check "yolo resolves in bash" bash -ic "type yolo"
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# Report results
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reportResults

‎test/claude-code/claude_code_yolo_alias_with_custom_user.sh‎

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#!/bin/bash
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# This test file will be executed against the 'claude_code_yolo_alias_with_custom_user' scenario
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# to verify that the yolo alias is properly configured for a non-root remoteUser.
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set -e
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# Import test library bundled with the devcontainer CLI
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source dev-container-features-test-lib
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# Feature-specific tests
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check "claude command available" which claude
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check "yolo alias in bashrc" bash -c "grep -Fq 'claude --allow-dangerously-skip-permissions' ~/.bashrc"
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check "yolo alias in zshrc" bash -c "grep -Fq 'claude --allow-dangerously-skip-permissions' ~/.zshrc"
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check "fish yolo function body" bash -c "test -f ~/.config/fish/functions/yolo.fish && grep -Fq 'claude --allow-dangerously-skip-permissions' ~/.config/fish/functions/yolo.fish"
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check "bashrc owned by current user" bash -c "test \"$(stat -c '%U' ~/.bashrc)\" = \"$(whoami)\""
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check "zshrc owned by current user" bash -c "test \"$(stat -c '%U' ~/.zshrc)\" = \"$(whoami)\""
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check "fish functions dir owned by current user" bash -c "test \"$(stat -c '%U' ~/.config/fish/functions)\" = \"$(whoami)\""
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check "fish function owned by current user" bash -c "test \"$(stat -c '%U' ~/.config/fish/functions/yolo.fish)\" = \"$(whoami)\""
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check "yolo resolves in bash" bash -ic "type yolo"
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# Report results
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reportResults

‎test/claude-code/scenarios.json‎

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"features": {
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"claude-code": {}
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}
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},
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"claude_code_yolo_alias": {
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"image": "mcr.microsoft.com/devcontainers/base:ubuntu",
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"features": {
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"claude-code": {
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"yoloAlias": true
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}
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}
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},
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"claude_code_yolo_alias_with_custom_user": {
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"image": "mcr.microsoft.com/devcontainers/base:ubuntu",
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"remoteUser": "vscode",
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"features": {
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"claude-code": {
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"yoloAlias": true
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}
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}
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}
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}

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