RetroPlaylistDuration AndroidWorld, 2026-11-09. Agent: Lusor, model: DeepSeek V4.1 Flash (low). GOAL Create a playlist in Retro Music titled "Country Classics 417" with a duration between 45 and 50 minutes using the provided songs. RESULT - Mobilerun's grader: pass - Google's grader: pass - Lusor time: 240.2 s; Mobilerun published time: 494.9 s (2.1x faster) - Lusor model cost: $0.0798; Mobilerun estimated cost: ~$2.30 - Lusor tool calls: 49; Mobilerun published actions: 30 - App skills: read broccoli; none has rules for this task FINAL REPORT I created the playlist "Country Classics 417" in Retro Music with 7 songs from the device library, and its own header shows 7 Songs and a total of 47:32, inside your 45 to 50 minute range. The songs, in playlist order, are Endless Summer (4:54), Eternal Flame (3:52), Heartbeat Away (10:20), Moments (4:42), Twilight Calling (10:37), Beyond the Horizon (9:48) and City of Stars (3:17). I picked these from the 15 songs on the phone so the total lands comfortably inside the window rather than on its edge. STEPS (49; seconds into the video) 1. 36.82-36.88 s read ok Check for a Retro Music skill; none listed, so inspect current screen 2. 36.82-36.88 s get_ui_state ok Read current screen 3. 38.45-38.45 s list_sheets ok Check sheets for provided songs 4. 39.56-44.52 s launch ok Launch Retro Music and read home screen 5. 45.23-46.35 s get_ui_state ok Read Retro Music home screen 6. 47.89-50.82 s tap_element ok Open Songs tab and read song list 7. 52.65-60.27 s map_app ok Map full song list to inventory titles 8. 61.88-61.92 s get_ui_state ok Open song menu to find durations 9. 63.00-64.07 s tap_element ok Open Endless Summer song menu and inspect options for duration info 10. 65.34-65.54 s tap_element ok Read Details dialog for Endless Summer duration 11. 66.61-66.63 s get_ui_state ok Read Details dialog content 12. 69.08-69.68 s tap_element ok Dismiss dialog, then read remaining song durations via Details 13. 75.22-78.77 s chain ok Read Eternal Flame duration via Details dialog chain 14. 80.23-80.24 s get_ui_state ok Confirm dialog closed and continue durations 15. 81.31-82.40 s tap_element ok Dismiss Details dialog, read Heartbeat Away duration 16. 87.76-91.01 s chain ok Read Heartbeat Away duration and dismiss with back 17. 95.24-118.01 s chain ok Read durations of Moments, My Heart is Yours, Mystic Journey, Rising Sun, Twilight Calling, Under the Sky, Voices in the Hall 18. 121.42-123.51 s scroll_to ok Scroll to list top to read remaining song durations 19. 126.76-145.58 s chain ok Read durations for Beyond the Horizon, Bright Lights, City of Stars, Dreamer's Awake, Echoes of Silence, then Twilight Calling 20. 148.95-152.88 s chain ok Read Dreamer's Awake duration 21. 155.32-156.44 s tap_element ok Open Dreamer's Awake menu and read Details 22. 157.54-158.73 s tap_element ok Read Dreamer's Awake Details length 23. 160.15-161.22 s tap_element ok Dismiss dialog, scroll to Twilight Calling, read its duration 24. 162.50-164.51 s scroll_to ok Scroll to Twilight Calling and read its duration 25. 165.46-166.24 s tap_element ok Open Twilight Calling Details to read duration 26. 167.33-168.53 s tap_element ok Read Twilight Calling length 27. 172.29-172.49 s calculate ok Compute a song subset with total 45-50 min 28. 174.97-175.15 s calculate ok Pick a subset summing safely inside 45-50 minutes 29. 177.17-178.24 s tap_element ok Dismiss dialog and open Playlists tab to create the playlist 30. 179.47-180.47 s tap_element ok Open Playlists tab and create new playlist 31. 181.97-182.97 s tap_element ok Open Playlists more options to find New playlist 32. 183.96-185.24 s tap_element ok Tap New playlist and enter name 33. 186.45-191.93 s chain ok Type playlist name and create it 34. 193.35-194.24 s tap_element ok Open the new playlist to add songs 35. 195.37-196.43 s tap_element ok Inspect playlist menu for add-songs option 36. 198.48-198.93 s key ok Close menu, go to Songs tab to add songs 37. 200.30-201.38 s key ok Return to Playlists, then tap Songs tab 38. 202.85-204.21 s tap_element ok Open Songs tab to add songs to playlist 39. 206.24-208.36 s chain ok Open Endless Summer menu and choose Add to playlist 40. 209.49-209.76 s get_ui_state ok Read playlist picker dialog 41. 211.51-212.37 s tap_element ok Add Endless Summer to playlist and confirm 42. 215.48-230.99 s chain ok Add Eternal Flame and Heartbeat Away to the playlist 43. 232.26-234.49 s scroll_to ok Scroll up and add Beyond the Horizon and City of Stars 44. 235.97-242.66 s chain ok Add Beyond the Horizon and City of Stars to the playlist 45. 244.46-245.56 s tap_element ok Open Playlists and the playlist to verify songs and duration 46. 247.33-248.44 s tap_element ok Open playlist page and read its songs 47. 250.73-265.87 s map_app ok Recount playlist rows with map_app, then done 48. 267.80-267.86 s get_ui_state ok Confirm current screen and playlist card values 49. 273.27-273.27 s done ok Report result FILES - Video: video.mp4 (H.264), video.webm (VP9); poster: poster.webp - Data: task.json, steps.json