design-engineer:cost-mode

Design Engineer – Cost mode

Plugin paths

Your conversation context contains a line DESIGN_ENGINEER_PLUGIN_ROOT: <absolute path> injected by the plugin's UserPromptSubmit hook. Whenever this command body references ${DESIGN_ENGINEER_PLUGIN_ROOT}/..., substitute the absolute path from that context line.

Context

#$ARGUMENTS

Step 1: Parse the argument

Read $ARGUMENTS. It must be exactly light or full. If anything else (empty, lite, medium, etc.), end the preceding chat message with the canonical 3-horizontal-rule spacer (per CLAUDE.md rule #6) and call AskUserQuestion:

question: "Which mode do you want to switch to?"
header: "Plugin mode"
options:
  - label: "Light"
    description: "Faster, lower token cost. All AI components run on Sonnet at medium effort. No Opus anywhere. Recommended if you have a usage limit or run long sessions."
  - label: "Full"
    description: "Higher quality. Most components run on Opus at high effort; some lighter-weight transforms (setup wizards, documentation, structured outputs) run on Sonnet. Higher token cost per session. Recommended when usage isn't a constraint."
multiSelect: false

Use the user's answer (light or full) as the target mode.

Step 2: Update the project config

Run via Bash:

mkdir -p .design-engineer-plugin
CONFIG=".design-engineer-plugin/config.yaml"
if [ -f "$CONFIG" ]; then
  if grep -qE '^cost_mode:' "$CONFIG"; then
    # Replace existing line
    sed -i.tmp -E "s/^cost_mode:.*/cost_mode: <MODE>/" "$CONFIG"
    rm "$CONFIG.tmp"
  else
    # Append
    printf '\ncost_mode: <MODE>\n' >> "$CONFIG"
  fi
else
  printf 'cost_mode: <MODE>\n' > "$CONFIG"
fi

Replace <MODE> with the target mode from Step 1.

Step 3: Apply the rewrite

Run the apply script via Bash, passing ${CLAUDE_PLUGIN_ROOT} resolved from the context line at the top of this file:

CLAUDE_PLUGIN_ROOT="${DESIGN_ENGINEER_PLUGIN_ROOT}" bash "${DESIGN_ENGINEER_PLUGIN_ROOT}/scripts/apply-cost-mode.sh"