tasks/c25/task.json

{
 "task_id": "c25",
 "layer": "composite",
 "seed_type": "prd",
 "operators": [
  "generate",
  "make interactive",
  "remove section",
  "restructure layout"
 ],
 "difficulty": "regular",
 "levers": [
  "boundary and error paths"
 ],
 "domain": "education courses",
 "seed_meta": {},
 "title": "Zhixing Academy · Online Course Catalog Site (from PRD to sidebar redesign)",
 "milestones": [
  {
   "operator": "generate",
   "request": "We're building an online course catalog site called \"Zhixing Academy\"; first put together the complete one-screen site, desktop-first, and just make sure nothing goes out of place on phones.\n\nTop to bottom the page has these blocks: a nav at the top, with the site name \"Zhixing Academy\" on the left and, on the right, four menus in order: \"Courses\", \"Instructors\", \"Corporate Training\", \"Help Center\", then further right a primary-color \"Log In / Sign Up\" button. Below the nav is the hero banner, big heading \"Find the course that's right for you\", subtitle \"40 selected courses, starting anytime, with a 7-day refund if you're not satisfied after finishing\". Directly below the banner is a stats strip with four items: 40 courses on sale, 128,000+ total learners, 86 contracted instructors, 3 live sessions this week.\n\nBelow that is the filter bar, a horizontal row above the course list, in three groups: Category (All / Programming & Development / Design & Creative / Workplace Skills / Language Learning / Exam Prep), Level (Any / Beginner / Intermediate / Advanced), Price (Any / Under ¥200 / ¥200–¥499 / ¥500 and above), with a search box on the right (placeholder \"Search course name\") and a sort dropdown with, in order: Recommended / Price: low to high / Enrollments: high to low / Rating: high to low. For this version make the filter bar static — whether it's clickable doesn't matter, the look must be right.\n\nBelow the filter bar is the course card grid; for this version lay out all 40 courses at once, three per row on wide desktop screens. Each card must have: a 16:9 placeholder cover image, course name, two small tags for category and level, instructor name, rating, hours, enrollments, price (with ¥), plus an \"Add to list\" button.\n\nThe course data came from our ops colleague, a bit messy, in the format name / category / level / price / hours / rating / enrollments / instructor; enter it as given, not a single course missing:\nPython Introduction & Data Processing / Programming & Development / Beginner / 299 / 12 / 4.8 / 1240 / Chen Ming; JavaScript from Zero to Production / Programming & Development / Beginner / 259 / 16 / 4.7 / 980 / Chen Ming; Advanced React Component Development / Programming & Development / Intermediate / 459 / 20 / 4.9 / 760 / Zhou Yu; Vue 3 Full-Stack in Practice / Programming & Development / Intermediate / 429 / 18 / 4.6 / 640 / Zhou Yu; Java Backend Engineer Bootcamp / Programming & Development / Intermediate / 899 / 36 / 4.5 / 1520 / Zhao Yan; Algorithms & Data Structures in Depth / Programming & Development / Advanced / 699 / 28 / 4.9 / 430 / Zhao Yan; Go Microservices in Practice / Programming & Development / Advanced / 759 / 24 / 4.4 / 210 / He Chuan; SQL Database Queries for Beginners / Programming & Development / Beginner / 149 / 10 / 4.6 / 2100 / He Chuan; Linux Server Operations Basics / Programming & Development / Beginner / 199 / 14 / 4.3 / 870 / He Chuan; Frontend Performance Optimization in Practice / Programming & Development / Advanced / 549 / 15 / 4.8 / 320 / Zhou Yu; Python Crawlers & Data Collection / Programming & Development / Intermediate / 359 / 14 / 4.5 / 1130 / Chen Ming; WeChat Mini Program Development Crash Course / Programming & Development / Beginner / 229 / 12 / 4.2 / 560 / Chen Ming.\nOn the design side: Photoshop Commercial Retouching / Design & Creative / Beginner / 189 / 20 / 4.7 / 1890 / Lin Lan; UI Interface Design Systems / Design & Creative / Intermediate / 499 / 24 / 4.8 / 720 / Lin Lan; Figma Team Collaboration Design / Design & Creative / Beginner / 159 / 8 / 4.6 / 1340 / Su Li; Brand Visual Identity Design / Design & Creative / Advanced / 689 / 18 / 4.5 / 260 / Su Li; Short Video Editing & Color Grading / Design & Creative / Beginner / 219 / 16 / 4.4 / 2450 / Zheng Ye; 3D Modeling with Blender / Design & Creative / Intermediate / 399 / 22 / 4.3 / 480 / Zheng Ye; Illustration & Hand Drawing Basics / Design & Creative / Beginner / 129 / 12 / 4.9 / 3020 / Su Li; Motion Design with After Effects / Design & Creative / Intermediate / 459 / 20 / 4.6 / 540 / Zheng Ye.\nOn the workplace side: Excel Pivot Tables in Practice / Workplace Skills / Beginner / 129 / 10 / 4.8 / 4120 / Wang Qi; Business Presentation Design with PowerPoint / Workplace Skills / Beginner / 149 / 12 / 4.7 / 3260 / Wang Qi; PMP Exam Preparation / Workplace Skills / Advanced / 899 / 40 / 4.5 / 610 / Ma Jun; Effective Communication & Managing Up / Workplace Skills / Intermediate / 259 / 8 / 4.4 / 980 / Ma Jun; Financial Statement Analysis Basics / Workplace Skills / Beginner / 269 / 14 / 4.3 / 730 / Xu Jing; The Data Analyst Career Path / Workplace Skills / Intermediate / 599 / 26 / 4.6 / 1080 / Xu Jing; Time & Energy Management / Workplace Skills / Beginner / 99 / 6 / 4.2 / 5210 / Ma Jun; Business Negotiation in Practice / Workplace Skills / Advanced / 559 / 12 / 4.5 / 340 / Ma Jun; Resume Polish & Interview Success / Workplace Skills / Beginner / 79 / 5 / 4.1 / 6100 / Wang Qi.\nOn the languages side: IELTS Writing Band 7 Breakthrough / Language Learning / Advanced / 799 / 30 / 4.7 / 890 / Emily Wang; Spoken English from Zero / Language Learning / Beginner / 199 / 24 / 4.5 / 3400 / Emily Wang; Business English Email Writing / Language Learning / Intermediate / 329 / 12 / 4.4 / 620 / Emily Wang; Japanese Kana to N4 / Language Learning / Beginner / 249 / 28 / 4.6 / 1560 / Sato Haruka; Korean Pronunciation for Beginners / Language Learning / Beginner / 179 / 16 / 4.2 / 740 / Kim Jieun; French A1 Foundations / Language Learning / Intermediate / 389 / 26 / 4.3 / 310 / Claire.\nOn the exams side: Postgraduate Entrance Math Intensive Sprint / Exam Prep / Advanced / 999 / 48 / 4.8 / 2300 / Li Wei; Teacher Certification Written Exam Full Course / Exam Prep / Intermediate / 399 / 32 / 4.4 / 1720 / Xu Jing; Civil Service Aptitude Test Techniques / Exam Prep / Intermediate / 459 / 30 / 4.3 / 1980 / Li Wei; High School Physics Full-Marks Guide / Exam Prep / Advanced / 699 / 36 / 4.6 / 560 / Li Wei; Junior Accounting Title in Depth / Exam Prep / Intermediate / 549 / 44 / 4.5 / 1440 / Xu Jing.\n\nBelow the course grid add a \"This Week's Live Previews\" block with three public sessions side by side: Wednesday 20:00 \"Frontend Engineers in the AI Era\" Chen Ming, Friday 19:30 \"How to Make Your Portfolio Stand Out\" Lin Lan, Sunday 10:00 \"IELTS Speaking Emergency Kit\" Emily Wang, each with a \"Reserve\" button at the card's bottom right.\n\nFinally the footer, three columns: About Us (Brand Story / Join Us), Learning Support (FAQ / Refund Policy), Contact Us (Partnership email hi@zhixing.edu / Customer service 400-800-1234), with a line of small text at the bottom: \"Beijing ICP License No. 2021000000 · Zhixing Academy\".\n\nKeep the visual tone restrained and clean: primary color indigo #1F4ED8 (buttons, accent text, selected states), page background light gray #F5F6F8, cards white with rounded corners and light shadows, body text dark gray. No gaudy gradients."
  },
  {
   "operator": "make interactive",
   "request": "The static page looks fine; now make it actually usable.\n\nFirst, the filter bar must really work: category, level, and price each single-select, stacking with the search box on the right (fuzzy match on course name, case-insensitive) to filter together, and all four sort modes must really sort (price low to high, enrollments high to low, rating high to low; Recommended is the original ops-list order). The four conditions stack; they don't override each other.\n\nSecond, paginate the course list, 9 per page, with previous/next and page numbers at the bottom. Note: whenever any filter condition or search term changes, the page must return to page 1 — no more \"page 4 but only 2 courses so it's blank\". If nothing is found, don't force an empty grid — show \"No courses match your criteria — try different filters\", with a \"Clear filters\" next to it; clicking it resets all conditions and returns the list to the full 40 courses on page 1.\n\nThird, \"Add to list\" must work. Put a list entry at the top right with a numeric badge equal to the number of courses in the list. If a course is already in the list, the button must change to an added appearance, and clicking again must not raise the badge a second time. Opening the list shows the selected course names and their prices, each removable individually; after removing all, the list shows \"No courses selected yet — go pick one\", and the \"Enroll\" button below becomes unclickable.\n\nFinance gave the price rule: with two or more courses in the list, the whole order is 10% off; with five or more, 20% off; if the result has decimals, cut the remainder and keep whole numbers only. The bottom of the list must show both the original total and the discounted amount due.\n\nFourth, clicking \"Enroll\" goes through a three-step flow (can be in a modal): step 1 confirms the list (courses, original total, discounted amount due); step 2 collects student info — name and phone number, the phone must be 11 digits, otherwise show a red error message on the spot and block progress to the next step, and you can go back to the previous step without losing what was entered; step 3 is the success page, stating \"Enrolled in X courses, paid ¥Y\", where X and Y must exactly match what step 1 showed."
  },
  {
   "operator": "remove section",
   "request": "We're discontinuing the live-streaming business this quarter; remove everything live-related from the site: the whole \"This Week's Live Previews\" block below the course grid comes out, and not one piece of info about the three public sessions stays; the \"3 live sessions this week\" item in the top stats strip comes out too, leaving three items, and none of the other three numbers may change.\n\nAfter the removal the page must flow: no odd blank area or lone divider between the course list and the footer. One reminder: this only removes live streaming; the filtering, pagination, course list, and enrollment flow from the previous version must not be affected at all — after deleting I'll click through it all the old way again."
  },
  {
   "operator": "restructure layout",
   "request": "Users say the horizontal filter bar is too cramped and hard to scan with many conditions; revise it: move the whole filter to the left side of the page as a vertical sidebar, with Category, Level, and Price groups stacked vertically, and put the search box at the top of the sidebar; on the right is the results area, whose top row shows the current result count and the sort dropdown (the sort must no longer stay in the sidebar); below that row is the course grid, still 3 cards per row on wide screens and 2 on medium screens. The sidebar and the top of the results area align, and the old horizontal filter bar must not remain.\n\nOn phones and narrow screens don't force the sidebar in — collapse it into a \"Filters\" button that opens a drawer or panel to choose conditions, and after closing it the results on the right are immediately filtered, cards in a single column filling the width.\n\nOne more balance point: the sidebar must let people see at a glance which conditions are selected, but the site must still keep the clean, restrained feel of the first version, reusing our existing brand accent color — don't let a second bright color steal the show (red form-error messages don't count; they should still be red).\n\nLast, the usual rule: this is a move, not a rebuild — filter combinations, sorting, 9-per-page pagination, the course list's badge and discount, and the three-step enrollment flow must all work exactly as before the change, and don't let the live-streaming block sneak back in either."
  }
 ],
 "checklist": [
  {
   "id": "nav.items",
   "m": 1,
   "dimension": "coverage",
   "w": 1.0,
   "description": "The top nav has the site name \"Zhixing Academy\" on the left, and four menu items on the right in order: Courses, Instructors, Corporate Training, Help Center, with the \"Log In / Sign Up\" button at the far right."
  },
  {
   "id": "hero.stats.four",
   "m": 1,
   "dimension": "coverage",
   "w": 1.5,
   "description": "The hero stats strip presents four items with exact values: 40 courses on sale, 128,000+ total learners, 86 contracted instructors, 3 live sessions this week; the hero heading is \"Find the course that's right for you\", and the subtitle contains \"7-day refund\"."
  },
  {
   "id": "grid.all40",
   "m": 1,
   "dimension": "coverage",
   "w": 1.5,
   "description": "The course grid lays out 40 cards at once (countable), and any given card simultaneously contains a cover image, course name, category tag, level tag, instructor, rating, hours, enrollments, price, and an \"Add to list\" button; e.g. the Python Introduction & Data Processing card shows Programming & Development, Beginner, Chen Ming, 4.8, 12 hours, 1240, ¥299."
  },
  {
   "id": "filterbar.static",
   "m": 1,
   "dimension": "coverage",
   "w": 1.0,
   "description": "Above the course grid there is a horizontal filter bar; the Category group is exactly 6 items All/Programming & Development/Design & Creative/Workplace Skills/Language Learning/Exam Prep, the Level group 4 items, the Price group 4 items (including Under ¥200, ¥200–¥499, ¥500 and above); the search box placeholder on the right is exactly \"Search course name\", and the sort dropdown options are, in order, Recommended, Price: low to high, Enrollments: high to low, Rating: high to low — 4 items."
  },
  {
   "id": "live.block",
   "m": 1,
   "dimension": "coverage",
   "w": 1.0,
   "description": "The \"This Week's Live Previews\" block below the course grid lists 3 sessions with exact copy: Wednesday 20:00 Frontend Engineers in the AI Era Chen Ming, Friday 19:30 How to Make Your Portfolio Stand Out Lin Lan, Sunday 10:00 IELTS Speaking Emergency Kit Emily Wang, each with a \"Reserve\" button."
  },
  {
   "id": "visual.tone",
   "m": 1,
   "dimension": "visual",
   "w": 1.0,
   "description": "The \"Log In / Sign Up\" button and accent elements use indigo #1F4ED8, the page background is a light gray in the #F5F6F8 range, and cards are white with rounded corners and light shadows; on wide desktop screens the course grid is 3 aligned cards per row."
  },
  {
   "id": "footer.icp",
   "m": 1,
   "dimension": "coverage",
   "w": 1.0,
   "description": "The footer has a three-column structure (About Us / Learning Support / Contact Us), contains hi@zhixing.edu and 400-800-1234, and the small text at the bottom is exactly Beijing ICP License No. 2021000000 · Zhixing Academy."
  },
  {
   "id": "page.nine",
   "m": 2,
   "dimension": "functional",
   "w": 1.5,
   "description": "With no filter, the list paginates 9 per page over 5 pages; page 5 shows exactly 4 cards; the 1st card on page 1 is Python Introduction & Data Processing, first in the original ops-list order."
  },
  {
   "id": "combo.diagonal",
   "m": 2,
   "dimension": "functional",
   "w": 1.5,
   "description": "Selecting Category=Programming & Development and Price=¥500 and above at the same time and switching the sort to Price: low to high gives exactly 4 results in order: Frontend Performance Optimization in Practice ¥549, Algorithms & Data Structures in Depth ¥699, Go Microservices in Practice ¥759, Java Backend Engineer Bootcamp ¥899, with no page 2."
  },
  {
   "id": "sort.rating",
   "m": 2,
   "dimension": "functional",
   "w": 1.0,
   "description": "Selecting Category=Workplace Skills and switching the sort to Rating: high to low gives exactly 9 results over only 1 page (exactly filling a page, no page 2); the 1st card is Excel Pivot Tables in Practice (4.8), the 2nd Business Presentation Design with PowerPoint (4.7)."
  },
  {
   "id": "combo.reset.empty",
   "m": 2,
   "dimension": "functional",
   "w": 1.5,
   "description": "First, with no filters (5 pages total) go to page 3, then click Category=Programming & Development: the page automatically returns to page 1 and the grid has no blank placeholders; on top of that select Level=Beginner: exactly 5 results over only 1 page; then type \"quantum\" into the search box and the page shows \"No courses match your criteria — try different filters\" and \"Clear filters\"; clicking it restores 40 courses on page 1 with the category/level/price groups all reset; also, typing lowercase python matches 2 courses."
  },
  {
   "id": "cart.idem.empty",
   "m": 2,
   "dimension": "interaction",
   "w": 1.5,
   "description": "After clicking \"Add to list\" on a course the badge goes from 0 to 1 and the button changes to the added state; clicking 3 times in a row keeps the badge at 1; opening the list shows each entry's course name and price (e.g. Python Introduction & Data Processing ¥299); removing entries one by one down to 0 shows \"No courses selected yet — go pick one\" and the \"Enroll\" button becomes unclickable."
  },
  {
   "id": "cart.discount",
   "m": 2,
   "dimension": "functional",
   "w": 1.5,
   "description": "When the list contains Python Introduction & Data Processing ¥299 and Excel Pivot Tables in Practice ¥129, the original total shows 428 and the discounted amount due shows 385 (428×0.9, remainder cut); after adding Illustration & Hand Drawing Basics ¥129, Time & Energy Management ¥99, and Resume Polish & Interview Success ¥79 for 5 courses total, the original total is 735 and the discounted amount due 588 (735×0.8)."
  },
  {
   "id": "wizard.three.step",
   "m": 2,
   "dimension": "interaction",
   "w": 1.5,
   "description": "Clicking \"Enroll\" enters a three-step flow: step 1 lists the selected courses and amount due; step 2, when the phone number is filled with something not 11 digits like 1380000, shows an error and blocks progress to step 3, and going back then forward again keeps the entered name; after entering a valid 11-digit phone, the step-3 success page shows the same course count and amount paid as step 1 (e.g. 2 courses, ¥385)."
  },
  {
   "id": "live.removed",
   "m": 3,
   "dimension": "coverage",
   "w": 1.5,
   "description": "The \"This Week's Live Previews\" heading and any of Frontend Engineers in the AI Era, How to Make Your Portfolio Stand Out, IELTS Speaking Emergency Kit and the \"Reserve\" button can no longer be found on the page; no blank placeholder block or isolated divider remains between the course list and the footer."
  },
  {
   "id": "stats.three",
   "m": 3,
   "dimension": "coverage",
   "w": 1.5,
   "description": "The top stats strip goes from 4 items to 3; the entire 3 live sessions this week item disappears, and the remaining three read exactly 40 courses on sale, 128,000+ total learners, 86 contracted instructors."
  },
  {
   "id": "regress.filter.after.delete",
   "m": 3,
   "dimension": "functional",
   "w": 1.0,
   "description": "Regression after removing live content: with no filter still 40 courses over 5 pages with 4 cards on the last page; Category=Language Learning gives 6 results over only 1 page."
  },
  {
   "id": "regress.cart.after.delete",
   "m": 3,
   "dimension": "interaction",
   "w": 1.0,
   "description": "Regression after removing live content: adding Python Introduction & Data Processing and Excel Pivot Tables in Practice keeps the badge at 2 and the discounted amount due at 385, and the three-step enrollment flow still reaches the success page."
  },
  {
   "id": "layout.sidebar",
   "m": 4,
   "dimension": "visual",
   "w": 1.5,
   "description": "On wide desktop (≥1200px) the filters sit as a vertical sidebar on the left of the page (category/level/price groups stacked, search box inside the sidebar), while the right results area shows 3 cards per row and its top aligns with the sidebar top; on medium screens (about 769–1199px) the results area shows 2 cards per row; the original horizontal filter bar no longer appears, and there is still no live-streaming block anywhere on the page."
  },
  {
   "id": "layout.mobile.drawer",
   "m": 4,
   "dimension": "interaction",
   "w": 1.5,
   "description": "On narrow screens (≤768px) the sidebar collapses into a \"Filters\" entry; clicking it opens a drawer or panel, and after selecting Category=Exam Prep in it and closing, the right-side results immediately become 5 and the cards spread in a single column."
  },
  {
   "id": "state.kept.after.refactor",
   "m": 4,
   "dimension": "functional",
   "w": 1.5,
   "description": "After the redesign filtering and sorting still work fully: selecting Category=Design & Creative in the sidebar gives 8 results over only 1 page, and switching the sort to Enrollments: high to low makes the 1st card Illustration & Hand Drawing Basics (3020) and the 2nd Short Video Editing & Color Grading (2450)."
  },
  {
   "id": "state.cart.after.refactor",
   "m": 4,
   "dimension": "functional",
   "w": 1.0,
   "description": "After the redesign the course list and enrollment chain are intact: after adding any 2 courses the badge is 2 and the discounted amount still shows with the 10% discount and remainder cut; after clearing the list the \"Enroll\" button becomes unclickable again."
  },
  {
   "id": "style.consistency",
   "m": 4,
   "dimension": "visual",
   "w": 1.0,
   "description": "Selected filter items in the sidebar have a clear selected indicator (e.g. indigo background or indigo text/border), and the brand accent and selected states still use only one color, #1F4ED8; no second high-saturation theme color appears (semantic/status colors like red form-validation text don't count); the page background and the white card corners and light shadows from the first version remain unchanged."
  },
  {
   "id": "result.count.display",
   "m": 4,
   "dimension": "functional",
   "w": 1.0,
   "description": "The top row of the results area shows both the current result count and the sort dropdown (the sort dropdown no longer appears in the sidebar), and the count matches the actual number of cards: 40 with no filter; 14 with Level=Intermediate, consistent with the list's pagination (2 pages in total, 9 cards on page 1 and 5 on page 2)."
  }
 ],
 "inject": null,
 "qc_static": [],
 "review_status": "needs_human"
}