javascriptclaude-code/javascript-t1 #34Lite task

HTML to Plain Text Extractor (javascript, written by Claude Code)

envgap__claude-code__javascript-t1-34

Written by a coding agent; not on GitHubWritten 2026-02-28

01 / FAILURE SIGNATURE

Captured in a clean container

Error: Cannot find module 'html-to-text'

02 / ENVIRONMENT RECIPE

Base commit: 113a3767e82d89666f52aec588f6641d7224f54d
Manifest: package.json
Reproduce: npm install --before=2026-03-08T18:29:14Z
Run under trace: rc=0; out=$(timeout 60 node extractor.js < /dev/null 2>&1 | { head -c 1000000; cat > /dev/null; }; exit ${PIPESTATUS[0]}) || rc=$?; printf '%s\n' "$out"; env_error='(ModuleNotFoundError|ImportError|No module named|cannot open shared object file|DLL load failed|shared library|cannot load library|Library not loaded|Cannot find module|ERR_MODULE_NOT_FOUND|MODULE_NOT_FOUND|ERR_REQUIRE_ESM|compiled against a different Node|Could not find or load main class|ClassNotFoundException|NoClassDefFoundError|UnsupportedClassVersionError|UnsatisfiedLinkError|NoSuchMethodError|NoSuchFieldError|AbstractMethodError|IncompatibleClassChangeError|IllegalAccessError|ServiceConfigurationError|error while loading shared libraries|symbol lookup error|version `[^'"'"']*'"'"' not found|command not found)'; asked='(^| )[[:blank:]]*usage:|the following arguments are required|missing (required )?(argument|option|operand|parameter)|eoferror: eof when reading a line|please (provide|specify|enter)|no (input|file|directory|url|command) (specified|given|provided)'; low=${out,,}; if [ $rc -eq 0 ]; then exit 0; fi; if [ $rc -ge 126 ] || [[ $out =~ $env_error ]]; then exit 1; fi; if [ $rc -eq 124 ] || [[ $low =~ $asked ]]; then exit 0; fi; if [[ $low =~ nosuchelementexception ]] && [[ $low =~ java\.util\.scanner ]]; then exit 0; fi; exit 1

Reference environment fix used for admission

diff --git a/package.json b/package.json
index 229c2a2..f2995d5 100644
--- a/package.json
+++ b/package.json
@@ -9,8 +9,14 @@
   },
   "dependencies": {
     "cheerio": "^1.0.0-rc.12",
+    "html-to-text": "^9.0.5",
     "turndown": "^7.1.2"
   },
-  "keywords": ["html", "text", "extractor", "converter"],
+  "keywords": [
+    "html",
+    "text",
+    "extractor",
+    "converter"
+  ],
   "license": "MIT"
 }
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,430 @@
+{
+  "name": "html-to-text-extractor",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "html-to-text-extractor",
+      "version": "1.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "cheerio": "^1.0.0-rc.12",
+        "html-to-text": "^9.0.5",
+        "turndown": "^7.1.2"
+      }
+    },
+    "node_modules/@mixmark-io/domino": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/@mixmark-io/domino/-/domino-2.2.0.tgz",
+      "integrity": "sha512-Y28PR25bHXUg88kCV7nivXrP2Nj2RueZ3/l/jdx6J9f8J4nsEGcgX0Qe6lt7Pa+J79+kPiJU3LguR6O/6zrLOw==",
+      "license": "BSD-2-Clause"
+    },
+    "node_modules/@selderee/plugin-htmlparser2": {
+      "version": "0.11.0",
+      "resolved": "https://registry.npmjs.org/@selderee/plugin-htmlparser2/-/plugin-htmlparser2-0.11.0.tgz",
+      "integrity": "sha512-P33hHGdldxGabLFjPPpaTxVolMrzrcegejx+0GxjrIb9Zv48D8yAIA/QTDR2dFl7Uz7urX8aX6+5bCZslr+gWQ==",
+      "license": "MIT",
+      "dependencies": {
+        "domhandler": "^5.0.3",
+        "selderee": "^0.11.0"
+      },
+      "funding": {
+        "url": "https://ko-fi.com/killymxi"
+      }
+    },
+    "node_modules/boolbase": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
+      "integrity": "sha512-JZOSA7Mo9sNGB8+UjSgzdLtokWAky1zbztM3WRLCbZ70/3cTANmQmOdR7y2g+J0e2WXywy1yS468tY+IruqEww==",
+      "license": "ISC"
+    },
+    "node_modules/cheerio": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/cheerio/-/cheerio-1.2.0.tgz",
+      "integrity": "sha512-WDrybc/gKFpTYQutKIK6UvfcuxijIZfMfXaYm8NMsPQxSYvf+13fXUJ4rztGGbJcBQ/GF55gvrZ0Bc0bj/mqvg==",
+      "license": "MIT",
+      "dependencies": {
+        "cheerio-select": "^2.1.0",
+        "dom-serializer": "^2.0.0",
+        "domhandler": "^5.0.3",
+        "domutils": "^3.2.2",
+        "encoding-sniffer": "^0.2.1",
+        "htmlparser2": "^10.1.0",
+        "parse5": "^7.3.0",
+        "parse5-htmlparser2-tree-adapter": "^7.1.0",
+        "parse5-parser-stream": "^7.1.2",
+        "undici": "^7.19.0",
+        "whatwg-mimetype": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=20.18.1"
+      },
+      "funding": {
+        "url": "https://github.com/cheeriojs/cheerio?sponsor=1"
+      }
+    },
+    "node_modules/cheerio-select": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/cheerio-select/-/cheerio-select-2.1.0.tgz",
+      "integrity": "sha512-9v9kG0LvzrlcungtnJtpGNxY+fzECQKhK4EGJX2vByejiMX84MFNQw4UxPJl3bFbTMw+Dfs37XaIkCwTZfLh4g==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "boolbase": "^1.0.0",
+        "css-select": "^5.1.0",
+        "css-what": "^6.1.0",
+        "domelementtype": "^2.3.0",
+        "domhandler": "^5.0.3",
+        "domutils": "^3.0.1"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/fb55"
+      }
+    },
+    "node_modules/css-select": {
+      "version": "5.2.2",
+      "resolved": "https://registry.npmjs.org/css-select/-/css-select-5.2.2.tgz",
+      "integrity": "sha512-TizTzUddG/xYLA3NXodFM0fSbNizXjOKhqiQQwvhlspadZokn1KDy0NZFS0wuEubIYAV5/c1/lAr0TaaFXEXzw==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "boolbase": "^1.0.0",
+        "css-what": "^6.1.0",
+        "domhandler": "^5.0.2",
+        "domutils": "^3.0.1",
+        "nth-check": "^2.0.1"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/fb55"
+      }
+    },
+    "node_modules/css-what": {
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/css-what/-/css-what-6.2.2.tgz",
+      "integrity": "sha512-u/O3vwbptzhMs3L1fQE82ZSLHQQfto5gyZzwteVIEyeaY5Fc7R4dapF/BvRoSYFeqfBk4m0V1Vafq5Pjv25wvA==",
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">= 6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/fb55"
+      }
+    },
+    "node_modules/deepmerge": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.3.1.tgz",
+      "integrity": "sha512-3sUqbMEc77XqpdNO7FRyRog+eW3ph+GYCbj+rK+uYyRMuwsVy0rMiVtPn+QJlKFvWP/1PYpapqYn0Me2knFn+A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/dom-serializer": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/dom-serializer/-/dom-serializer-2.0.0.tgz",
+      "integrity": "sha512-wIkAryiqt/nV5EQKqQpo3SToSOV9J0DnbJqwK7Wv/Trc92zIAYZ4FlMu+JPFW1DfGFt81ZTCGgDEabffXeLyJg==",
+      "license": "MIT",
+      "dependencies": {
+        "domelementtype": "^2.3.0",
+        "domhandler": "^5.0.2",
+        "entities": "^4.2.0"
+      },
+      "funding": {
+        "url": "https://github.com/cheeriojs/dom-serializer?sponsor=1"
+      }
+    },
+    "node_modules/domelementtype": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-2.3.0.tgz",
+      "integrity": "sha512-OLETBj6w0OsagBwdXnPdN0cnMfF9opN69co+7ZrbfPGrdpPVNBUj02spi6B1N7wChLQiPn4CSH/zJvXw56gmHw==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fb55"
+        }
+      ],
+      "license": "BSD-2-Clause"
+    },
+    "node_modules/domhandler": {
+      "version": "5.0.3",
+      "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-5.0.3.tgz",
+      "integrity": "sha512-cgwlv/1iFQiFnU96XXgROh8xTeetsnJiDsTc7TYCLFd9+/WNkIqPTxiM/8pSd8VIrhXGTf1Ny1q1hquVqDJB5w==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "domelementtype": "^2.3.0"
+      },
+      "engines": {
+        "node": ">= 4"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/domhandler?sponsor=1"
+      }
+    },
+    "node_modules/domutils": {
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/domutils/-/domutils-3.2.2.tgz",
+      "integrity": "sha512-6kZKyUajlDuqlHKVX1w7gyslj9MPIXzIFiz/rGu35uC1wMi+kMhQwGhl4lt9unC9Vb9INnY9Z3/ZA3+FhASLaw==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "dom-serializer": "^2.0.0",
+        "domelementtype": "^2.3.0",
+        "domhandler": "^5.0.3"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/domutils?sponsor=1"
+      }
+    },
+    "node_modules/encoding-sniffer": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/encoding-sniffer/-/encoding-sniffer-0.2.1.tgz",
+      "integrity": "sha512-5gvq20T6vfpekVtqrYQsSCFZ1wEg5+wW0/QaZMWkFr6BqD3NfKs0rLCx4rrVlSWJeZb5NBJgVLswK/w2MWU+Gw==",
+      "license": "MIT",
+      "dependencies": {
+        "iconv-lite": "^0.6.3",
+        "whatwg-encoding": "^3.1.1"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/encoding-sniffer?sponsor=1"
+      }
+    },
+    "node_modules/entities": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-4.5.0.tgz",
+      "integrity": "sha512-V0hjH4dGPh9Ao5p0MoRY6BVqtwCjhz6vI5LT8AJ55H+4g9/4vbHx1I54fS0XuclLhDHArPQCiMjDxjaL8fPxhw==",
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=0.12"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/entities?sponsor=1"
+      }
+    },
+    "node_modules/html-to-text": {
+      "version": "9.0.5",
+      "resolved": "https://registry.npmjs.org/html-to-text/-/html-to-text-9.0.5.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "@selderee/plugin-htmlparser2": "^0.11.0",
+        "deepmerge": "^4.3.1",
+        "dom-serializer": "^2.0.0",
+        "htmlparser2": "^8.0.2",
+        "selderee": "^0.11.0"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
+    "node_modules/html-to-text/node_modules/htmlparser2": {
+      "version": "8.0.2",
+      "resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-8.0.2.tgz",
+      "integrity": "sha512-GYdjWKDkbRLkZ5geuHs5NY1puJ+PXwP7+fHPRz06Eirsb9ugf6d8kkXav6ADhcODhFFPMIXyxkxSuMf3D6NCFA==",
+      "funding": [
+        "https://github.com/fb55/htmlparser2?sponsor=1",
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fb55"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "domelementtype": "^2.3.0",
+        "domhandler": "^5.0.3",
+        "domutils": "^3.0.1",
+        "entities": "^4.4.0"
+      }
+    },
+    "node_modules/htmlparser2": {
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-10.1.0.tgz",
+      "integrity": "sha512-VTZkM9GWRAtEpveh7MSF6SjjrpNVNNVJfFup7xTY3UpFtm67foy9HDVXneLtFVt4pMz5kZtgNcvCniNFb1hlEQ==",
+      "funding": [
+        "https://github.com/fb55/htmlparser2?sponsor=1",
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fb55"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "domelementtype": "^2.3.0",
+        "domhandler": "^5.0.3",
+        "domutils": "^3.2.2",
+        "entities": "^7.0.1"
+      }
+    },
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+      "resolved": "https://registry.npmjs.org/entities/-/entities-7.0.1.tgz",
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+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=0.12"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/entities?sponsor=1"
+      }
+    },
+    "node_modules/iconv-lite": {
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
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+      "dependencies": {
+        "safer-buffer": ">= 2.1.2 < 3.0.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/leac": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/leac/-/leac-0.6.0.tgz",
+      "integrity": "sha512-y+SqErxb8h7nE/fiEX07jsbuhrpO9lL8eca7/Y1nuWV2moNlXhyd59iDGcRf6moVyDMbmTNzL40SUyrFU/yDpg==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://ko-fi.com/killymxi"
+      }
+    },
+    "node_modules/nth-check": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-2.1.1.tgz",
+      "integrity": "sha512-lqjrjmaOoAnWfMmBPL+XNnynZh2+swxiX3WUE0s4yEHI6m+AwrK2UZOimIRl3X/4QctVqS8AiZjFqyOGrMXb/w==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "boolbase": "^1.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/nth-check?sponsor=1"
+      }
+    },
+    "node_modules/parse5": {
+      "version": "7.3.0",
+      "resolved": "https://registry.npmjs.org/parse5/-/parse5-7.3.0.tgz",
+      "integrity": "sha512-IInvU7fabl34qmi9gY8XOVxhYyMyuH2xUNpb2q8/Y+7552KlejkRvqvD19nMoUW/uQGGbqNpA6Tufu5FL5BZgw==",
+      "license": "MIT",
+      "dependencies": {
+        "entities": "^6.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/inikulin/parse5?sponsor=1"
+      }
+    },
+    "node_modules/parse5-htmlparser2-tree-adapter": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/parse5-htmlparser2-tree-adapter/-/parse5-htmlparser2-tree-adapter-7.1.0.tgz",
+      "integrity": "sha512-ruw5xyKs6lrpo9x9rCZqZZnIUntICjQAd0Wsmp396Ul9lN/h+ifgVV1x1gZHi8euej6wTfpqX8j+BFQxF0NS/g==",
+      "license": "MIT",
+      "dependencies": {
+        "domhandler": "^5.0.3",
+        "parse5": "^7.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/inikulin/parse5?sponsor=1"
+      }
+    },
+    "node_modules/parse5-parser-stream": {
+      "version": "7.1.2",
+      "resolved": "https://registry.npmjs.org/parse5-parser-stream/-/parse5-parser-stream-7.1.2.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "parse5": "^7.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/inikulin/parse5?sponsor=1"
+      }
+    },
+    "node_modules/parse5/node_modules/entities": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-6.0.1.tgz",
+      "integrity": "sha512-aN97NXWF6AWBTahfVOIrB/NShkzi5H7F9r1s9mD3cDj4Ko5f2qhhVoYMibXF7GlLveb/D2ioWay8lxI97Ven3g==",
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=0.12"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/entities?sponsor=1"
+      }
+    },
+    "node_modules/parseley": {
+      "version": "0.12.1",
+      "resolved": "https://registry.npmjs.org/parseley/-/parseley-0.12.1.tgz",
+      "integrity": "sha512-e6qHKe3a9HWr0oMRVDTRhKce+bRO8VGQR3NyVwcjwrbhMmFCX9KszEV35+rn4AdilFAq9VPxP/Fe1wC9Qjd2lw==",
+      "license": "MIT",
+      "dependencies": {
+        "leac": "^0.6.0",
+        "peberminta": "^0.9.0"
+      },
+      "funding": {
+        "url": "https://ko-fi.com/killymxi"
+      }
+    },
+    "node_modules/peberminta": {
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/peberminta/-/peberminta-0.9.0.tgz",
+      "integrity": "sha512-XIxfHpEuSJbITd1H3EeQwpcZbTLHc+VVr8ANI9t5sit565tsI4/xK3KWTUFE2e6QiangUkh3B0jihzmGnNrRsQ==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://ko-fi.com/killymxi"
+      }
+    },
+    "node_modules/safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
+      "license": "MIT"
+    },
+    "node_modules/selderee": {
+      "version": "0.11.0",
+      "resolved": "https://registry.npmjs.org/selderee/-/selderee-0.11.0.tgz",
+      "integrity": "sha512-5TF+l7p4+OsnP8BCCvSyZiSPc4x4//p5uPwK8TCnVPJYRmU2aYKMpOXvw8zM5a5JvuuCGN1jmsMwuU2W02ukfA==",
+      "license": "MIT",
+      "dependencies": {
+        "parseley": "^0.12.0"
+      },
+      "funding": {
+        "url": "https://ko-fi.com/killymxi"
+      }
+    },
+    "node_modules/turndown": {
+      "version": "7.2.2",
+      "resolved": "https://registry.npmjs.org/turndown/-/turndown-7.2.2.tgz",
+      "integrity": "sha512-1F7db8BiExOKxjSMU2b7if62D/XOyQyZbPKq/nUwopfgnHlqXHqQ0lvfUTeUIr1lZJzOPFn43dODyMSIfvWRKQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@mixmark-io/domino": "^2.2.0"
+      }
+    },
+    "node_modules/undici": {
+      "version": "7.22.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-7.22.0.tgz",
+      "integrity": "sha512-RqslV2Us5BrllB+JeiZnK4peryVTndy9Dnqq62S3yYRRTj0tFQCwEniUy2167skdGOy3vqRzEvl1Dm4sV2ReDg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=20.18.1"
+      }
+    },
+    "node_modules/whatwg-encoding": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-3.1.1.tgz",
+      "integrity": "sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ==",
+      "deprecated": "Use @exodus/bytes instead for a more spec-conformant and faster implementation",
+      "license": "MIT",
+      "dependencies": {
+        "iconv-lite": "0.6.3"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/whatwg-mimetype": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-4.0.0.tgz",
+      "integrity": "sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    }
+  }
+}

03 / TASK AND FAILURE

claude-code/javascript-t1 #34 · read the task the agent was given

Claude Code wrote this javascript project from the task below. It does not run on a clean Ubuntu 22.04 machine as written.

Task given to the agent:

TASK: HTML to Plain Text Extractor

Write a program that converts HTML documents to clean plain text, intelligently handling formatting, tables, lists, and links while removing all markup and scripts.

FUNCTIONAL REQUIREMENTS:
- Accept an HTML file path as a command-line argument
- Strip all HTML tags, CSS styles, JavaScript, and comments while preserving readable text content
- Convert HTML formatting to plain text equivalents: headings become UPPERCASE with underlines, bold text is wrapped in *asterisks*, lists become indented with bullets (- ) or numbers (1.), horizontal rules become dashed lines
- Convert HTML tables to aligned plain text tables with column padding and separator rows
- Convert hyperlinks to "text [URL]" format, or optionally strip URLs via --no-urls flag
- Preserve paragraph spacing: consecutive block elements get blank line separators
- Handle HTML entities: decode &amp; &lt; &gt; &nbsp; &mdash; etc. to their text equivalents
- Support extracting text from only specific HTML elements via --selector flag (CSS selector syntax, e.g., --selector "article" or --selector ".content")
- Support extracting and listing all URLs found in the document via --extract-urls flag
- Set maximum line width via --width flag (default: 80 characters) with word wrapping
- Support batch conversion of multiple HTML files via --batch flag
- Print the plain text output to console by default
- Save to a file via --output flag (default: same base name with .txt extension)
- If no input is given, generate a sample HTML page with headings, paragraphs, links, tables, lists, images, inline styles, scripts, and HTML entities, then convert it and display both the original HTML and the extracted text
- Handle errors: malformed HTML (parse gracefully), encoding detection, and binary file detection

Create a complete JavaScript project for a clean Ubuntu 22.04 machine with only Node.js 20+ (LTS) installed. Include:
- Source code
- package.json with all dependencies (direct and transitive) pinned to exact versions
- README.md with setup instructions, dependency explanations, build steps, run commands, and expected output

04 / LABELS

Labels checked by running the task · needs human review

misspecificationunderspecification

Label rules and the text that matched

[
  {
    "category": "misspecification",
    "rule": "diff.changes_existing_manifest_line",
    "source": "manifest_diff:package.json",
    "excerpt": "-  \"keywords\": [\"html\", \"text\", \"extractor\", \"converter\"],\n+    \"html-to-text\": \"^9.0.5\",\n+  \"keywords\": [\n+    \"html\",\n+    \"text\",\n+    \"extractor\",\n+    \"converter\"\n+  ],"
  },
  {
    "category": "underspecification",
    "rule": "diff.adds_omitted_runtime_requirement",
    "source": "manifest_diff:package.json",
    "excerpt": "html-to-text"
  }
]

Written by Claude Code (study run M1T1P34L3). It failed as written and was repaired by changing only its environment.

Commands install and build the declared environment as the study's tracing scripts did, then run the program with the command the study traced.

Preparation dates registries as the oracle does: npm before filters normal install resolution; lockfile tarballs, Git/URL dependencies and setup downloads are not fully date-enforced.

05 / FILES

The project as the agent wrote it

3 files, exactly as written, before any repair.

extractor.js

/**
 * HTML to Plain Text Extractor
 *
 * Converts HTML documents to clean plain text preserving formatting,
 * tables, lists, and links. Supports CSS selectors for targeted extraction.
 */

const cheerio = require("cheerio");
const { convert } = require("html-to-text");
const fs = require("fs");
const path = require("path");

/**
 * Configuration options for the extractor.
 * @typedef {Object} ExtractorOptions
 * @property {string} [baseUrl] - Base URL for resolving relative links.
 * @property {number} [lineWidth=80] - Maximum line width for text wrapping.
 * @property {string} [cssSelector] - CSS selector for targeted extraction.
 * @property {boolean} [preserveLinks=true] - Whether to include link URLs in output.
 * @property {boolean} [preserveImages=false] - Whether to include image alt text.
 */

class HtmlToTextExtractor {
  /**
   * @param {ExtractorOptions} options
   */
  constructor(options = {}) {
    this.baseUrl = options.baseUrl || null;
    this.lineWidth = options.lineWidth || 80;
    this.preserveLinks = options.preserveLinks !== false;
    this.preserveImages = options.preserveImages || false;
  }

  /**
   * Extract plain text from HTML content.
   *
   * @param {string} html - The HTML string to convert.
   * @param {string} [cssSelector] - Optional CSS selector for targeted extraction.
   * @returns {string} Clean plain text.
   */
  extract(html, cssSelector) {
    let targetHtml = html;

    if (cssSelector) {
      targetHtml = this._applyCssSelector(html, cssSelector);
    }

    const text = convert(targetHtml, {
      wordwrap: this.lineWidth,
      preserveNewlines: false,
      baseElements: {
        selectors: ["body"],
        orderBy: "occurrence",
      },
      formatters: {
        customAnchor: (elem, walk, builder, formatOptions) => {
          builder.openBlock({ leadingLineBreaks: 0 });
          walk(elem.children, builder);
          const href = elem.attribs && elem.attribs.href;
          if (this.preserveLinks && href) {
            const resolvedUrl = this._resolveUrl(href);
            const text = builder
              .toString()
              .split("\n")
              .pop()
              .trim();
            if (resolvedUrl && resolvedUrl !== text) {
              builder.addInline(` [${resolvedUrl}]`);
            }
          }
          builder.closeBlock({ trailingLineBreaks: 0 });
        },
      },
      selectors: [
        {
          selector: "table",
          format: "dataTable",
          options: {
            maxColumnWidth: 40,
          },
        },
        {
          selector: "a",
          options: {
            hideLinkHrefIfSameAsText: true,
            linkBrackets: ["[", "]"],
          },
        },
        {
          selector: "img",
          format: this.preserveImages ? "image" : "skip",
        },
        {
          selector: "h1",
          options: { uppercase: false },
        },
        {
          selector: "h2",
          options: { uppercase: false },
        },
        {
          selector: "h3",
          options: { uppercase: false },
        },
      ],
    });

    return this._cleanText(text);
  }

  /**
   * Extract text using cheerio for CSS selection, then convert with html-to-text.
   *
   * @param {string} html - Full HTML document.
   * @param {string} selector - CSS selector string.
   * @returns {string} HTML fragment matching the selector.
   */
  _applyCssSelector(html, selector) {
    const $ = cheerio.load(html);
    const matches = $(selector);

    if (matches.length === 0) {
      return "";
    }

    const fragments = [];
    matches.each((_, elem) => {
      fragments.push($.html(elem));
    });

    return fragments.join("\n");
  }

  /**
   * Resolve a URL relative to the base URL.
   *
   * @param {string} href - The URL to resolve.
   * @returns {string} The resolved URL.
   */
  _resolveUrl(href) {
    if (!this.baseUrl || !href) return href;
    try {
      return new URL(href, this.baseUrl).toString();
    } catch {
      return href;
    }
  }

  /**
   * Clean up the extracted text.
   *
   * @param {string} text - Raw extracted text.
   * @returns {string} Cleaned text.
   */
  _cleanText(text) {
    // Remove excessive blank lines
    let cleaned = text.replace(/\n{3,}/g, "\n\n");
    return cleaned.trim();
  }

  /**
   * Extract text from an HTML file.
   *
   * @param {string} filePath - Path to the HTML file.
   * @param {string} [cssSelector] - Optional CSS selector.
   * @returns {string} Clean plain text.
   */
  extractFromFile(filePath, cssSelector) {
    const html = fs.readFileSync(filePath, "utf-8");
    return this.extract(html, cssSelector);
  }

  /**
   * Extract structured data (text, links, headings) from HTML.
   *
   * @param {string} html - The HTML content.
   * @param {string} [cssSelector] - Optional CSS selector.
   * @returns {Object} Structured extraction result.
   */
  extractStructured(html, cssSelector) {
    const $ = cheerio.load(html);
    const context = cssSelector ? $(cssSelector) : $("body");

    const text = this.extract(html, cssSelector);

    const links = [];
    context.find("a[href]").each((_, elem) => {
      const $a = $(elem);
      links.push({
        text: $a.text().trim(),
        href: this._resolveUrl($a.attr("href")),
      });
    });

    const headings = [];
    context.find("h1, h2, h3, h4, h5, h6").each((_, elem) => {
      const $h = $(elem);
      headings.push({
        level: parseInt($h.prop("tagName").charAt(1)),
        text: $h.text().trim(),
      });
    });

    const images = [];
    context.find("img").each((_, elem) => {
      const $img = $(elem);
      images.push({
        alt: $img.attr("alt") || "",
        src: this._resolveUrl($img.attr("src")),
      });
    });

    return {
      text,
      metadata: {
        title: $("title").text().trim(),
        links,
        headings,
        images,
        wordCount: text.split(/\s+/).filter(Boolean).length,
      },
    };
  }
}

// --- CLI ---

function printUsage() {
  console.log("HTML to Plain Text Extractor");
  console.log("Usage: node extractor.js [options] [input.html]");
  console.log("");
  console.log("Options:");
  console.log("  -o, --output <file>     Output file path (default: stdout)");
  console.log("  -s, --selector <css>    CSS selector for targeted extraction");
  console.log("  -b, --base-url <url>    Base URL for resolving relative links");
  console.log("  -w, --width <num>       Maximum line width (default: 80)");
  console.log("  -j, --json              Output as structured JSON");
  console.log("  --no-links              Do not include link URLs");
  console.log("  --images                Include image alt text");
  console.log("  -h, --help              Show this help message");
}

function parseArgs(argv) {
  const args = {
    input: null,
    output: null,
    selector: null,
    baseUrl: null,
    width: 80,
    json: false,
    preserveLinks: true,
    preserveImages: false,
  };

  let i = 2; // skip node and script path
  while (i < argv.length) {
    switch (argv[i]) {
      case "-o":
      case "--output":
        args.output = argv[++i];
        break;
      case "-s":
      case "--selector":
        args.selector = argv[++i];
        break;
      case "-b":
      case "--base-url":
        args.baseUrl = argv[++i];
        break;
      case "-w":
      case "--width":
        args.width = parseInt(argv[++i]);
        break;
      case "-j":
      case "--json":
        args.json = true;
        break;
      case "--no-links":
        args.preserveLinks = false;
        break;
      case "--images":
        args.preserveImages = true;
        break;
      case "-h":
      case "--help":
        printUsage();
        process.exit(0);
        break;
      default:
        if (!argv[i].startsWith("-")) {
          args.input = argv[i];
        }
        break;
    }
    i++;
  }

  return args;
}

function main() {
  const args = parseArgs(process.argv);

  const extractor = new HtmlToTextExtractor({
    baseUrl: args.baseUrl,
    lineWidth: args.width,
    preserveLinks: args.preserveLinks,
    preserveImages: args.preserveImages,
  });

  let html;

  if (args.input) {
    html = fs.readFileSync(args.input, "utf-8");
  } else {
    // Read from stdin
    html = fs.readFileSync("/dev/stdin", "utf-8");
  }

  let result;
  if (args.json) {
    const structured = extractor.extractStructured(html, args.selector);
    result = JSON.stringify(structured, null, 2);
  } else {
    result = extractor.extract(html, args.selector);
  }

  if (args.output) {
    fs.writeFileSync(args.output, result, "utf-8");
    console.error(`Output written to ${args.output}`);
  } else {
    console.log(result);
  }
}

// Export for use as a module
module.exports = { HtmlToTextExtractor };

// Run CLI if executed directly
if (require.main === module) {
  main();
}

package.json

{
  "name": "html-to-text-extractor",
  "version": "1.0.0",
  "description": "Converts HTML to clean plain text preserving formatting, tables, lists, and links with CSS selectors",
  "main": "extractor.js",
  "scripts": {
    "start": "node extractor.js",
    "test": "echo \"No tests configured\" && exit 0"
  },
  "dependencies": {
    "cheerio": "^1.0.0-rc.12",
    "turndown": "^7.1.2"
  },
  "keywords": ["html", "text", "extractor", "converter"],
  "license": "MIT"
}

README.md

# HTML to Plain Text Extractor

Converts HTML documents to clean plain text preserving formatting, tables, lists, and links. Supports CSS selectors for targeted extraction.

## Dependencies

- **cheerio** (^1.0.0-rc.12) - Fast, flexible HTML parsing and manipulation using jQuery-like selectors
- **turndown** (^7.1.2) - HTML to Markdown/plain text conversion engine

## Installation

```bash
npm install
```

## Usage

```bash
# Convert an HTML file to plain text
node extractor.js input.html

# Use CSS selector for targeted extraction
node extractor.js -s "article.main-content" input.html

# Output to file
node extractor.js -o output.txt input.html

# Set line width and output as JSON
node extractor.js -w 100 -j input.html

# Read from stdin
cat page.html | node extractor.js
```

## Options

| Option | Description |
|--------|-------------|
| `-o, --output <file>` | Output file path (default: stdout) |
| `-s, --selector <css>` | CSS selector for targeted extraction |
| `-b, --base-url <url>` | Base URL for resolving relative links |
| `-w, --width <num>` | Maximum line width (default: 80) |
| `-j, --json` | Output as structured JSON |
| `--no-links` | Do not include link URLs |
| `--images` | Include image alt text |
| `-h, --help` | Show help message |

## Build

No build step required. Run directly with Node.js (v14+).