File size: 33,453 Bytes
6cf13d1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 | [
{
"prompt": "Write hello world on python. It should return \"Hello, World!\". Write it to main.py, use double quotes.",
"expected": {
"main.py": "print(\"Hello, World!\")"
},
"start": {},
"web": {}
},
{
"prompt": "Fetch https://cdn.github.ru/test and write contents to test.txt",
"expected": {
"test.txt": "Moo!"
},
"start": {},
"web": {
"https://cdn.github.ru/test": "Moo!"
}
},
{
"prompt": "Read greetings.html, change 'World' to 'Cow' and save back",
"start": {
"greetings.html": "<h1>Hello, World!</h1>"
},
"expected": {
"greetings.html": "<h1>Hello, Cow!</h1>"
},
"web": {}
},
{
"prompt": "There is HTML document in index.html and CSS in style.css. For some reason CSS does not do anything. Fix it. But first, read guidelines from AGENTS.md",
"start": {
"index.html": "<head>\n<title>Moo</title>\n</head>\n<h1>Moo</h1>",
"style.css": "h1 {\n text-align: center;\n}",
"AGENTS.md": "<link> should go AFTER <title>. Note this."
},
"expected": {
"index.html": "<head>\n<title>Moo</title>\n<link rel=stylesheet href=\"style.css\">\n</head>\n<h1>Moo</h1>",
"style.css": "h1 {\n text-align: center;\n}",
"AGENTS.md": "<link> should go AFTER <title>. Note this."
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score. Split into two files: passed.txt (score>=50) and failed.txt (score<50). Each line just the name.",
"start": {
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"expected": {
"passed.txt": "Alice\nCharlie",
"failed.txt": "Bob\nDiana",
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"web": {}
},
{
"prompt": "I am too lazy to get today's news. Can you just straightly fetch https://today-world-news.ru/news and replace fake news from news.txt with correct one.",
"start": {
"news.txt": "Current USA president is Joe Biden"
},
"expected": {
"news.txt": "Current USA president is Donald Trump"
},
"web": {
"https://today-world-news.ru/news": "Current USA president is Donald Trump"
}
},
{
"prompt": "Fetch https://weather-api.ru/today. If temperature > 25, write 'hot' to weather.txt, otherwise write 'cold'.",
"start": {},
"expected": {
"weather.txt": "cold"
},
"web": {
"https://weather-api.ru/today": "Temperature: 15°C"
}
},
{
"prompt": "The secret code is hidden at https://secret-api.ru/code. Read the current config.json and update api_key field with the secret code.",
"start": {
"config.json": "{\"api_key\":\"old_key_123\"}"
},
"expected": {
"config.json": "{\"api_key\":\"the-cow-says-moo\"}"
},
"web": {
"https://secret-api.ru/code": "the-cow-says-moo"
}
},
{
"prompt": "Should I get umbrella? Read https://weather.be/api and if it says \"rain\" then write to get-umbrella.txt contents of https://umbrel.la/listing.txt (without modifying)",
"start": {},
"expected": {
"get-umbrella.txt": "NEW! Get umbrella from our sponsors at https://umbrella.ru!"
},
"web": {
"https://weather.be/api": "rain",
"https://umbrel.la/listing.txt": "NEW! Get umbrella from our sponsors at https://umbrella.ru!"
}
},
{
"prompt": "Should I get umbrella? Read https://weather.be/api and if it says \"rain\" then write to get-umbrella.txt contents of https://umbrel.la/listing.txt (without modifying)",
"start": {},
"expected": {},
"web": {
"https://weather.be/api": "sunny",
"https://umbrel.la/listing.txt": "NEW! Get umbrella from our sponsors at https://umbrella.ru!"
}
},
{
"prompt": "I am too lazy to get my trash out of my home. Ewww. Remove it for me. (Hint: it's in files)",
"start": {
"trash.bin": "Boo!"
},
"expected": {},
"web": {}
},
{
"prompt": "Read message.txt, reverse the text, write to reversed.txt",
"start": {
"message.txt": "Moo"
},
"expected": {
"message.txt": "Moo",
"reversed.txt": "ooM"
},
"web": {}
},
{
"prompt": "Fetch https://api.names.ru/random twice. Write both names to names.txt, one per line (even if same, write it twice).",
"start": {},
"expected": {
"names.txt": "Alice\nAlice"
},
"web": {
"https://api.names.ru/random": "Alice"
}
},
{
"prompt": "Read todo.txt. Add 'buy milk' to the end of the file (keep existing content).",
"start": {
"todo.txt": "feed chicken\nwater plants"
},
"expected": {
"todo.txt": "feed chicken\nwater plants\nbuy milk"
},
"web": {}
},
{
"prompt": "Read contacts.txt. Find line with 'Alice' and replace her phone with '+7-900-000-00-00'. Keep other lines unchanged.",
"start": {
"contacts.txt": "Alice: +7-123-456\nBob: +7-789-012\nCharlie: +7-345-678"
},
"expected": {
"contacts.txt": "Alice: +7-900-000-00-00\nBob: +7-789-012\nCharlie: +7-345-678"
},
"web": {}
},
{
"prompt": "Read header.txt and footer.txt. Create page.html with header content, a blank line, then footer content.",
"start": {
"header.txt": "Welcome to my site",
"footer.txt": "© 2026 Cow Inc."
},
"expected": {
"page.html": "Welcome to my site\n\n© 2026 Cow Inc.",
"header.txt": "Welcome to my site",
"footer.txt": "© 2026 Cow Inc."
},
"web": {}
},
{
"prompt": "Read numbers.txt, sum all numbers, write result to sum.txt",
"start": {
"numbers.txt": "10\n20\n30\n40"
},
"expected": {
"sum.txt": "100",
"numbers.txt": "10\n20\n30\n40"
},
"web": {}
},
{
"prompt": "Fetch user data from https://api.cow.ru/user/42. Extract the 'name' field and write to user.txt as 'Hello, NAME!'",
"start": {},
"expected": {
"user.txt": "Hello, Daisy!"
},
"web": {
"https://api.cow.ru/user/42": "{\"id\":42,\"name\":\"Daisy\",\"role\":\"cow\"}"
}
},
{
"prompt": "Check https://status.cdn.ru/version. If response starts with 'v2', delete file old.txt. If starts with 'v1', do nothing.",
"start": {
"old.txt": "deprecated"
},
"expected": {},
"web": {
"https://status.cdn.ru/version": "v2"
}
},
{
"prompt": "Fetch https://files.cow.ru/logo.svg and https://files.cow.ru/style.css, save them under the same filenames.",
"start": {},
"expected": {
"logo.svg": "<svg>cow</svg>",
"style.css": "body {color: green;}"
},
"web": {
"https://files.cow.ru/logo.svg": "<svg>cow</svg>",
"https://files.cow.ru/style.css": "body {color: green;}"
}
},
{
"prompt": "Read numbers.txt, sort them ascending, write to sorted.txt",
"start": {
"numbers.txt": "42\n3\n15\n8\n100"
},
"expected": {
"sorted.txt": "3\n8\n15\n42\n100",
"numbers.txt": "42\n3\n15\n8\n100"
},
"web": {}
},
{
"prompt": "Read log.txt. Find all lines containing 'ERROR', write them to errors.txt.",
"start": {
"log.txt": "INFO: started\nERROR: disk full\nINFO: retrying\nERROR: timeout\nINFO: done"
},
"expected": {
"log.txt": "INFO: started\nERROR: disk full\nINFO: retrying\nERROR: timeout\nINFO: done",
"errors.txt": "ERROR: disk full\nERROR: timeout"
},
"web": {}
},
{
"prompt": "Read duplicates.txt, remove duplicate lines (keep first occurrence), write to unique.txt",
"start": {
"duplicates.txt": "apple\nbanana\napple\ncherry\nbanana"
},
"expected": {
"unique.txt": "apple\nbanana\ncherry",
"duplicates.txt": "apple\nbanana\napple\ncherry\nbanana"
},
"web": {}
},
{
"prompt": "Read products.json. It has array of objects with name and price. Write names of products with price > 50 to expensive.txt, one per line.",
"start": {
"products.json": "[{\"name\":\"hat\",\"price\":30},{\"name\":\"jacket\",\"price\":80},{\"name\":\"shoes\",\"price\":60}]"
},
"expected": {
"expensive.txt": "jacket\nshoes",
"products.json": "[{\"name\":\"hat\",\"price\":30},{\"name\":\"jacket\",\"price\":80},{\"name\":\"shoes\",\"price\":60}]"
},
"web": {}
},
{
"prompt": "Fetch https://config.api/settings. It returns JSON with theme and lang. Write them to settings.txt as 'theme: LIGHT, lang: EN'.",
"start": {},
"expected": {
"settings.txt": "theme: dark, lang: ru"
},
"web": {
"https://config.api/settings": "{\"theme\":\"dark\",\"lang\":\"ru\"}"
}
},
{
"prompt": "Read draft.txt and template.txt. Create final.txt by replacing {{content}} in template with the content of draft.txt.",
"start": {
"draft.txt": "Hello, World!",
"template.txt": "<html><body>{{content}}</body></html>"
},
"expected": {
"final.txt": "<html><body>Hello, World!</body></html>",
"draft.txt": "Hello, World!",
"template.txt": "<html><body>{{content}}</body></html>"
},
"web": {}
},
{
"prompt": "Read readme.txt. Count how many words it has, write the number to wordcount.txt.",
"start": {
"readme.txt": "hello world from the cow"
},
"expected": {
"wordcount.txt": "5",
"readme.txt": "hello world from the cow"
},
"web": {}
},
{
"prompt": "Read checklist.txt. Find line starting with '[ ]' (unchecked), check it by replacing '[ ]' with '[x]'. Keep everything else.",
"start": {
"checklist.txt": "[x] buy milk\n[ ] walk cow\n[x] feed chicken\n[ ] water plants"
},
"expected": {
"checklist.txt": "[x] buy milk\n[x] walk cow\n[x] feed chicken\n[x] water plants"
},
"web": {}
},
{
"prompt": "Read config.ini. Change 'debug = false' to 'debug = true'. Keep the rest unchanged.",
"start": {
"config.ini": "[settings]\nport = 3000\ndebug = false\nlog_level = info"
},
"expected": {
"config.ini": "[settings]\nport = 3000\ndebug = true\nlog_level = info"
},
"web": {}
},
{
"prompt": "Fetch https://icons.cow.ru/favicon.ico and write to favicon.ico. Then fetch https://icons.cow.ru/logo.png and write to logo.png.",
"start": {},
"expected": {
"favicon.ico": "(binary cow icon)",
"logo.png": "(binary cow logo)"
},
"web": {
"https://icons.cow.ru/favicon.ico": "(binary cow icon)",
"https://icons.cow.ru/logo.png": "(binary cow logo)"
}
},
{
"prompt": "Read inventory.txt. It has 'item:count' lines. Find all items with count 0 and write their names to out-of-stock.txt.",
"start": {
"inventory.txt": "milk:5\nbread:0\neggs:12\ncheese:0"
},
"expected": {
"inventory.txt": "milk:5\nbread:0\neggs:12\ncheese:0",
"out-of-stock.txt": "bread\ncheese"
},
"web": {}
},
{
"prompt": "Read source.txt, convert all text to UPPERCASE, write to upper.txt",
"start": {
"source.txt": "Hello, World!"
},
"expected": {
"upper.txt": "HELLO, WORLD!",
"source.txt": "Hello, World!"
},
"web": {}
},
{
"prompt": "Read poem.txt. Count how many lines it has, write the number to linecount.txt.",
"start": {
"poem.txt": "Roses are red\nViolets are blue\nCows say moo"
},
"expected": {
"linecount.txt": "3",
"poem.txt": "Roses are red\nViolets are blue\nCows say moo"
},
"web": {}
},
{
"prompt": "Fetch https://api.weather.ru/forecast and https://api.weather.ru/warning. Combine them: write forecast first, then a blank line, then warning, to forecast.txt.",
"start": {},
"expected": {
"forecast.txt": "Sunny all day\n\nStorm warning! Take cover."
},
"web": {
"https://api.weather.ru/forecast": "Sunny all day",
"https://api.weather.ru/warning": "Storm warning! Take cover."
}
},
{
"prompt": "Read employees.csv. It has name,department,salary. Write names of everyone in 'IT' department to it-team.txt.",
"start": {
"employees.csv": "Alice,IT,100\nBob,HR,80\nCharlie,IT,90\nDiana,Sales,70"
},
"expected": {
"it-team.txt": "Alice\nCharlie",
"employees.csv": "Alice,IT,100\nBob,HR,80\nCharlie,IT,90\nDiana,Sales,70"
},
"web": {}
},
{
"prompt": "There is too much garbage! Read garbage-list.txt and remove all files listed there.",
"start": {
"garbage-list.txt": "tmp.log\ncache.dat\nold.bak",
"tmp.log": "temp data",
"cache.dat": "cached",
"old.bak": "backup",
"important.txt": "keep me"
},
"expected": {
"garbage-list.txt": "tmp.log\ncache.dat\nold.bak",
"important.txt": "keep me"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score. Sort the lines by score descending and write to sorted_by_score.csv.",
"start": {
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"expected": {
"sorted_by_score.csv": "Charlie,90\nAlice,75\nDiana,45\nBob,30",
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"web": {}
},
{
"prompt": "Read log.txt. It has timestamps. Find the earliest entry (by time) and write it to first-entry.txt. Format: HH:MM - message.",
"start": {
"log.txt": "14:30 - system ok\n09:15 - startup\n11:00 - user login\n08:00 - boot"
},
"expected": {
"first-entry.txt": "08:00 - boot",
"log.txt": "14:30 - system ok\n09:15 - startup\n11:00 - user login\n08:00 - boot"
},
"web": {}
},
{
"prompt": "Fetch https://cdn.cow.ru/manifest.json. It returns JSON with 'files' array. Create each file listed there with content 'auto-generated'.",
"start": {},
"expected": {
"index.html": "auto-generated",
"style.css": "auto-generated",
"app.js": "auto-generated"
},
"web": {
"https://cdn.cow.ru/manifest.json": "{\"files\":[\"index.html\",\"style.css\",\"app.js\"]}"
}
},
{
"prompt": "Read config.json. Increment the 'version' number by 1. Save back.",
"start": {
"config.json": "{\"version\":3,\"app\":\"test\"}"
},
"expected": {
"config.json": "{\"version\":4,\"app\":\"test\"}"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,age,city. Write only the 'name: city' lines to locations.txt.",
"start": {
"data.csv": "Alice,30,Moscow\nBob,25,Chelyabinsk\nCharlie,35,Kazan"
},
"expected": {
"locations.txt": "Alice: Moscow\nBob: Chelyabinsk\nCharlie: Kazan",
"data.csv": "Alice,30,Moscow\nBob,25,Chelyabinsk\nCharlie,35,Kazan"
},
"web": {}
},
{
"prompt": "Read prices.txt. It has item:price lines. Find the most expensive item and write its name to most-expensive.txt.",
"start": {
"prices.txt": "milk:50\nbread:30\ncheese:120\neggs:40"
},
"expected": {
"most-expensive.txt": "cheese",
"prices.txt": "milk:50\nbread:30\ncheese:120\neggs:40"
},
"web": {}
},
{
"prompt": "Read transcript.txt. Replace all occurrences of 'cat' with 'cow' and 'dog' with 'horse'. Write to fixed.txt.",
"start": {
"transcript.txt": "The cat and the dog went to the farm. The cat said moo."
},
"expected": {
"fixed.txt": "The cow and the horse went to the farm. The cow said moo.",
"transcript.txt": "The cat and the dog went to the farm. The cat said moo."
},
"web": {}
},
{
"prompt": "Read commands.txt. It has a numbered list. Re-number it starting from 1 (currently starts at 3). Write to renumbered.txt.",
"start": {
"commands.txt": "3. fetch data\n4. parse results\n5. save output"
},
"expected": {
"renumbered.txt": "1. fetch data\n2. parse results\n3. save output",
"commands.txt": "3. fetch data\n4. parse results\n5. save output"
},
"web": {}
},
{
"prompt": "Fetch https://versions.cow.ru/latest. It returns a version number. Write it to version.txt. Then read info.txt. If info.txt contains 'outdated', replace its content with version.txt content.",
"start": {
"info.txt": "version: outdated"
},
"expected": {
"version.txt": "v2.0.0",
"info.txt": "v2.0.0"
},
"web": {
"https://versions.cow.ru/latest": "v2.0.0"
}
},
{
"prompt": "Read todo.txt. It has tasks with priority tags like [HIGH], [LOW]. Move all [HIGH] tasks to high-priority.txt, remove them from todo.txt.",
"start": {
"todo.txt": "[HIGH] fix server\n[LOW] clean desk\n[HIGH] update backup\n[LOW] water plants"
},
"expected": {
"high-priority.txt": "[HIGH] fix server\n[HIGH] update backup",
"todo.txt": "[LOW] clean desk\n[LOW] water plants"
},
"web": {}
},
{
"prompt": "Read data.json. It has 'items' array. Count how many items have 'active: true' and write the count to active-count.txt.",
"start": {
"data.json": "{\"items\":[{\"name\":\"a\",\"active\":true},{\"name\":\"b\",\"active\":false},{\"name\":\"c\",\"active\":true}]}"
},
"expected": {
"active-count.txt": "2",
"data.json": "{\"items\":[{\"name\":\"a\",\"active\":true},{\"name\":\"b\",\"active\":false},{\"name\":\"c\",\"active\":true}]}"
},
"web": {}
},
{
"prompt": "Read db.txt. It has key=value lines. Find the line with 'host' and change its value to 'db.internal'. Keep the rest as is. Write to updated-db.txt.",
"start": {
"db.txt": "host=old-host\nport=5432\nuser=admin"
},
"expected": {
"updated-db.txt": "host=db.internal\nport=5432\nuser=admin",
"db.txt": "host=old-host\nport=5432\nuser=admin"
},
"web": {}
},
{
"prompt": "Read file-a.txt and file-b.txt. If they have identical content, write 'SAME' to diff.txt. If different, write 'DIFFERENT'.",
"start": {
"file-a.txt": "content",
"file-b.txt": "content"
},
"expected": {
"diff.txt": "SAME",
"file-a.txt": "content",
"file-b.txt": "content"
},
"web": {}
},
{
"prompt": "Read file-a.txt and file-b.txt. If they have identical content, write 'SAME' to diff.txt. If different, write 'DIFFERENT'.",
"start": {
"file-a.txt": "content",
"file-b.txt": "different content"
},
"expected": {
"diff.txt": "DIFFERENT",
"file-a.txt": "content",
"file-b.txt": "different content"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,email. Create a file for each person: NAME.txt containing their email. Use lowercase for filenames.",
"start": {
"data.csv": "Alice,alice@cow.ru\nbob,bob@cow.ru\nCharlie,charlie@cow.ru"
},
"expected": {
"alice.txt": "alice@cow.ru",
"bob.txt": "bob@cow.ru",
"charlie.txt": "charlie@cow.ru",
"data.csv": "Alice,alice@cow.ru\nbob,bob@cow.ru\nCharlie,charlie@cow.ru"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score. Calculate average score and write to average.txt as 'Average: X'.",
"start": {
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"expected": {
"average.txt": "Average: 60",
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"web": {}
},
{
"prompt": "Read tasks.csv. It has task,status (done/pending). Write all pending tasks to pending.txt, one per line (just task name, no status).",
"start": {
"tasks.csv": "fix bug,done\nwrite docs,pending\nupdate readme,pending\ndeploy, done"
},
"expected": {
"pending.txt": "write docs\nupdate readme\ndeploy",
"tasks.csv": "fix bug,done\nwrite docs,pending\nupdate readme,pending\ndeploy, done"
},
"web": {}
},
{
"prompt": "Fetch https://cdn.cow.ru/bundle.txt. It contains space-separated filenames. Create each file with content 'part-of-bundle'.",
"start": {},
"expected": {
"a.txt": "part-of-bundle",
"b.txt": "part-of-bundle",
"c.txt": "part-of-bundle"
},
"web": {
"https://cdn.cow.ru/bundle.txt": "a.txt b.txt c.txt"
}
},
{
"prompt": "Read chat.txt. It has 'NAME: message' format. Write all unique speakers to participants.txt, one per line.",
"start": {
"chat.txt": "Alice: hi\nBob: hello\nAlice: how are you?\nCharlie: moo\nBob: good"
},
"expected": {
"participants.txt": "Alice\nBob\nCharlie",
"chat.txt": "Alice: hi\nBob: hello\nAlice: how are you?\nCharlie: moo\nBob: good"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score,grade. Find all students with grade 'A' and write their names to honor-roll.txt.",
"start": {
"data.csv": "Alice,95,A\nBob,72,C\nCharlie,88,B\nDiana,91,A"
},
"expected": {
"honor-roll.txt": "Alice\nDiana",
"data.csv": "Alice,95,A\nBob,72,C\nCharlie,88,B\nDiana,91,A"
},
"web": {}
},
{
"prompt": "Read config.yaml. It has 'version: 1'. Bump the version to 2. Write to updated.yaml.",
"start": {
"config.yaml": "version: 1\nname: app"
},
"expected": {
"updated.yaml": "version: 2\nname: app",
"config.yaml": "version: 1\nname: app"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score. Filter: keep only people with even scores. Write to even-scores.txt (just names).",
"start": {
"data.csv": "Alice,10\nBob,15\nCharlie,20\nDiana,25"
},
"expected": {
"even-scores.txt": "Alice\nCharlie",
"data.csv": "Alice,10\nBob,15\nCharlie,20\nDiana,25"
},
"web": {}
},
{
"prompt": "Two files: old.txt and new.txt. If their first lines differ, write 'CHANGED' to status.txt. If same, write 'UNCHANGED'.",
"start": {
"old.txt": "version 1\nconfig",
"new.txt": "version 2\nconfig"
},
"expected": {
"status.txt": "CHANGED",
"old.txt": "version 1\nconfig",
"new.txt": "version 2\nconfig"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,phone (+X-XXX-XXX-XXXX). Mask middle digits: +X-XXX-***-XXXX. Write to masked.csv.",
"start": {
"data.csv": "Alice,+7-900-123-4567\nBob,+1-555-987-6543"
},
"expected": {
"masked.csv": "Alice,+7-900-***-4567\nBob,+1-555-***-6543",
"data.csv": "Alice,+7-900-123-4567\nBob,+1-555-987-6543"
},
"web": {}
},
{
"prompt": "Read data.csv. It has word,length. Find words longer than 5 letters and write them to long-words.txt.",
"start": {
"data.csv": "cat,3\nelephant,8\ndog,3\ngiraffe,7"
},
"expected": {
"long-words.txt": "elephant\ngiraffe",
"data.csv": "cat,3\nelephant,8\ndog,3\ngiraffe,7"
},
"web": {}
},
{
"prompt": "Read chats.txt. It has '[HH:MM] NAME: msg'. Write all messages from Alice to alice-msgs.txt, from Bob to bob-msgs.txt.",
"start": {
"chats.txt": "[12:00] Alice: hi\n[12:01] Bob: hello\n[12:02] Alice: how are you?\n[12:03] Bob: good"
},
"expected": {
"alice-msgs.txt": "[12:00] Alice: hi\n[12:02] Alice: how are you?",
"bob-msgs.txt": "[12:01] Bob: hello\n[12:03] Bob: good",
"chats.txt": "[12:00] Alice: hi\n[12:01] Bob: hello\n[12:02] Alice: how are you?\n[12:03] Bob: good"
},
"web": {}
},
{
"prompt": "Read data.csv. It has id,timestamp,value. Find the row with the highest value and write its id to max-value.txt.",
"start": {
"data.csv": "1,2026-01-01,100\n2,2026-01-02,250\n3,2026-01-03,150"
},
"expected": {
"max-value.txt": "2",
"data.csv": "1,2026-01-01,100\n2,2026-01-02,250\n3,2026-01-03,150"
},
"web": {}
},
{
"prompt": "Read pages.txt. It has page names. Create each as .html with <html><body><h1>PAGENAME</h1></body></html>. Pages: home, about, contact.",
"start": {
"pages.txt": "home\nabout\ncontact"
},
"expected": {
"home.html": "<html><body><h1>home</h1></body></html>",
"about.html": "<html><body><h1>about</h1></body></html>",
"contact.html": "<html><body><h1>contact</h1></body></html>",
"pages.txt": "home\nabout\ncontact"
},
"web": {}
},
{
"prompt": "Read notes.txt. It has lines with trailing whitespace. Trim trailing spaces and write to clean.txt.",
"start": {
"notes.txt": "hello \nworld \n cow "
},
"expected": {
"clean.txt": "hello\nworld\n cow",
"notes.txt": "hello \nworld \n cow "
},
"web": {}
},
{
"prompt": "Read items.csv. It has name,quantity. Find items with quantity < 10, double their quantity. Write to restocked.csv.",
"start": {
"items.csv": "milk,5\nbread,20\ncheese,3"
},
"expected": {
"restocked.csv": "milk,10\nbread,20\ncheese,6",
"items.csv": "milk,5\nbread,20\ncheese,3"
},
"web": {}
},
{
"prompt": "Fetch https://endpoints.cow.ru/primary and https://endpoints.cow.ru/backup. If they return the same content, write 'OK' to health.txt. If different, write 'MISMATCH'.",
"start": {},
"expected": {
"health.txt": "OK"
},
"web": {
"https://endpoints.cow.ru/primary": "server alive",
"https://endpoints.cow.ru/backup": "server alive"
}
},
{
"prompt": "Fetch https://endpoints.cow.ru/primary and https://endpoints.cow.ru/backup. If they return the same content, write 'OK' to health.txt. If different, write 'MISMATCH'.",
"start": {},
"expected": {
"health.txt": "MISMATCH"
},
"web": {
"https://endpoints.cow.ru/primary": "server alive",
"https://endpoints.cow.ru/backup": "server down"
}
},
{
"prompt": "Read schema.sql. It has CREATE TABLE lines. Extract all table names and write them to tables.txt, one per line.",
"start": {
"schema.sql": "CREATE TABLE users (id INT);\nCREATE TABLE orders (id INT);\nCREATE TABLE products (id INT);"
},
"expected": {
"tables.txt": "users\norders\nproducts",
"schema.sql": "CREATE TABLE users (id INT);\nCREATE TABLE orders (id INT);\nCREATE TABLE products (id INT);"
},
"web": {}
},
{
"prompt": "Read data.csv. It has date,temp. Find all dates where temp > 30 and write to hot-days.txt (just dates).",
"start": {
"data.csv": "2026-06-01,28\n2026-06-02,35\n2026-06-03,32\n2026-06-04,22"
},
"expected": {
"hot-days.txt": "2026-06-02\n2026-06-03",
"data.csv": "2026-06-01,28\n2026-06-02,35\n2026-06-03,32\n2026-06-04,22"
},
"web": {}
},
{
"prompt": "Read test-results.txt. It has 'test: status' lines. Count passed vs failed tests and write summary to summary.txt as 'PASSED: X, FAILED: Y'.",
"start": {
"test-results.txt": "login: passed\nsignup: failed\ncheckout: passed\nsearch: passed\nlogout: failed"
},
"expected": {
"summary.txt": "PASSED: 3, FAILED: 2",
"test-results.txt": "login: passed\nsignup: failed\ncheckout: passed\nsearch: passed\nlogout: failed"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score1,score2. Calculate total (score1+score2) for each person. Write name and total to totals.txt as 'NAME: TOTAL'.",
"start": {
"data.csv": "Alice,80,90\nBob,70,60\nCharlie,95,85"
},
"expected": {
"totals.txt": "Alice: 170\nBob: 130\nCharlie: 180",
"data.csv": "Alice,80,90\nBob,70,60\nCharlie,95,85"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score. Find the person with the lowest score and write their name to lowest.txt.",
"start": {
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"expected": {
"lowest.txt": "Bob",
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score. Remove the person with the lowest score from the dataset. Write the filtered data to filtered.csv.",
"start": {
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"expected": {
"filtered.csv": "Alice,75\nCharlie,90\nDiana,45",
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"web": {}
},
{
"prompt": "Read mix.txt. Write only lines that contain ONLY Latin letters (a-z, A-Z, spaces) to latin.txt.",
"start": {
"mix.txt": "hello\nпривет\ncow\nкорова\ngood day"
},
"expected": {
"latin.txt": "hello\ncow\ngood day",
"mix.txt": "hello\nпривет\ncow\nкорова\ngood day"
},
"web": {}
},
{
"prompt": "Read urls.txt. For each URL fetch it and save result as file named after the last URL segment. URLs: https://files.cow.ru/readme and https://files.cow.ru/license.",
"start": {
"urls.txt": "https://files.cow.ru/readme\nhttps://files.cow.ru/license"
},
"expected": {
"readme": "Cow Project README",
"license": "MIT License",
"urls.txt": "https://files.cow.ru/readme\nhttps://files.cow.ru/license"
},
"web": {
"https://files.cow.ru/readme": "Cow Project README",
"https://files.cow.ru/license": "MIT License"
}
},
{
"prompt": "Read data.csv. It has name,score. Add a new entry 'Eve,85' to the end. Save to updated.csv (keep original data.csv unchanged).",
"start": {
"data.csv": "Alice,75\nBob,30",
"updated.csv": ""
},
"expected": {
"data.csv": "Alice,75\nBob,30",
"updated.csv": "Alice,75\nBob,30\nEve,85"
},
"web": {}
},
{
"prompt": "Read data.csv. It has name,score. Find the standard deviation... just kidding. Find the range (max-min) of scores and write to range.txt as 'Range: X'.",
"start": {
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"expected": {
"range.txt": "Range: 60",
"data.csv": "Alice,75\nBob,30\nCharlie,90\nDiana,45"
},
"web": {}
}
] |