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Single-command picker that prompts for every experimental knob the project supports, then dispatches to `tools/run_webots.sh` with the matching env vars. The banner reminds the user that the interpreter path lives in `tools/setup_env.sh` (or `$HERDING_PYTHON`) so the "this conda path won't exist on another machine" trap is hard to fall into. Prompts, in order: Mode : bc | rl | strombom | sequential | universal Drive : differential | mecanum World : field | field_round LiDAR FOV : 140° | 360° (skipped when drive=mecanum) Dogs : 1 | 2 (axis-split — only ask leak if 2) Sheep : 1..10 Perception : LiDAR | GT bypass Headless : no (windowed) | yes (xvfb-run + fast mode) Each prompt has a default marked with `*`; pressing Enter through the whole flow runs the canonical demo (BC / diff / field / 140° / 1 dog / 5 sheep / LiDAR / windowed). The configuration is summarised in a boxed block before the final "Launch? [Y/n]" confirm. README quick-start now lists `tools/webots_menu.sh` as the recommended starting point and shows the env-var-prefixed launcher invocations (HERDING_LIDAR=360, HERDING_NDOGS=2, HERDING_USE_GT=1) for non-interactive use. 126 pytest cases still pass. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>