cursor:setup - Cursor Backend Setup

Cursor backend の setup / verification 用 skill。配布 plugin の fallback は claude のままにし、現在の repo / user 環境だけ cursor default にする時に使う。

Quick Reference

cursor:setup --check
cursor:setup --user-default
cursor:setup --project-default
cursor:setup --unset

Rules

• Do not change distribution defaults or plugin manifests to make Cursor the shipped fallback.
• Use scripts/resolve-impl-backend.sh / scripts/set-impl-backend.sh; do not infer from HARNESS_IMPL_BACKEND alone.
• Treat ~/.cursor/permissions.json, .cursorignore, and Claude sandbox allowlists as manual/user-owned setup surfaces unless the user explicitly asks to edit a local file.

Flow

First resolve the Harness helper root. Keep the current working directory as the target project so project-scoped env.local writes still land in the user's repo:

HARNESS_PLUGIN_ROOT="${HARNESS_PLUGIN_ROOT:-${CLAUDE_PLUGIN_ROOT:-}}"
if [ -z "$HARNESS_PLUGIN_ROOT" ] && [ -n "${CLAUDE_SKILL_DIR:-}" ]; then
  probe="$(cd "${CLAUDE_SKILL_DIR}" && pwd)"
  while [ "$probe" != "/" ] && [ ! -d "$probe/scripts" ]; do
    probe="$(cd "$probe/.." && pwd)"
  done
  [ -d "$probe/scripts" ] && HARNESS_PLUGIN_ROOT="$probe"
fi
if [ -z "$HARNESS_PLUGIN_ROOT" ]; then
  echo "ERROR: HARNESS_PLUGIN_ROOT is not set and could not be derived from CLAUDE_PLUGIN_ROOT or CLAUDE_SKILL_DIR" >&2
  exit 2
fi

1. For --check, run: