{"id":19429,"date":"2026-09-24T11:00:20","date_gmt":"2026-09-24T05:30:20","guid":{"rendered":"https:\/\/procreator.design\/blog\/?p=19429"},"modified":"2026-09-23T20:43:19","modified_gmt":"2026-09-23T15:13:19","slug":"chatgpt-codex-agent-claude-skills-compared","status":"publish","type":"post","link":"https:\/\/procreator.design\/blog\/chatgpt-codex-agent-claude-skills-compared\/","title":{"rendered":"Claude Skills, ChatGPT, Codex &#038; Agent Skills Explained"},"content":{"rendered":"<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-doc-id=\"5057927000008011008\" data-doc-type=\"writer\">Four terms are starting to blur into one another. That is creating a bigger architecture problem than the naming suggests.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Claude Skills, ChatGPT Skills, Codex Skills, and Agent Skills are related, but they do not describe four competing versions of the same feature. The confusion starts when teams mix the reusable workflow format with the environment that runs it. One term describes an implementation, another a product surface, and another the open format underneath them.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">This article separates those layers. It explains what each term means, what they share, what actually changes across platforms, how portability breaks, and which parts of a Skill an enterprise should keep independent from Claude, ChatGPT, or Codex.<\/p>\n<h2 class=\"zw-paragraph heading2\" data-header=\"2\" data-margin-bottom=\"14.94pt\" data-margin-top=\"14.94pt\" data-hd-info=\"2\" data-line-height=\"1.2\">TL;DR<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_th4wcnm3zhsm&quot;,&quot;name&quot;:&quot;_Tocyjfnf3y1m3rg&quot;}\" data-bookmark-id=\"toc_th4wcnm3zhsm\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_th4wcnm3zhsm&quot;,&quot;name&quot;:&quot;_Tocyjfnf3y1m3rg&quot;}\" data-bookmark-id=\"toc_th4wcnm3zhsm\">\u00a0<\/span><\/h2>\n<ul data-list-id=\"60876508\" data-list-format=\"{&quot;level0&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;0.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level1&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level2&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level3&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level4&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level5&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level6&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level7&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level8&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}}}\" data-spl-bullet-format=\"{}\">\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"60876508\" data-list-info=\"{&quot;id&quot;:&quot;60876508&quot;,&quot;l&quot;:0}\">The open Skill format defines the portable package, while Claude, ChatGPT, and Codex provide different environments that can use it.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"60876508\" data-list-info=\"{&quot;id&quot;:&quot;60876508&quot;,&quot;l&quot;:0}\">A Skill can package a repeatable method, including instructions, references, scripts, examples, and supporting resources.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"60876508\" data-list-info=\"{&quot;id&quot;:&quot;60876508&quot;,&quot;l&quot;:0}\">The runtime changes what the Skill can do, because tools, permissions, files, integrations, networking, and execution capabilities differ by product.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"60876508\" data-list-info=\"{&quot;id&quot;:&quot;60876508&quot;,&quot;l&quot;:0}\">Portability depends on separation, so the method should stay distinct from platform-specific commands, access, and permissions.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"60876508\" data-list-info=\"{&quot;id&quot;:&quot;60876508&quot;,&quot;l&quot;:0}\">The useful comparison is not which product has Skills, but which parts of the workflow remain valid when the runtime changes.<\/p>\n<\/li>\n<\/ul>\n<h2 class=\"zw-paragraph heading2\" data-header=\"2\" data-margin-bottom=\"14.94pt\" data-margin-top=\"14.94pt\" data-hd-info=\"2\" data-line-height=\"1.2\">What Are Claude Skills, ChatGPT Skills, Codex Skills &amp; Agent Skills?<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_e2k8rptanluz&quot;,&quot;name&quot;:&quot;_Tocctyh2jleb5b8&quot;}\" data-bookmark-id=\"toc_e2k8rptanluz\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_e2k8rptanluz&quot;,&quot;name&quot;:&quot;_Tocctyh2jleb5b8&quot;}\" data-bookmark-id=\"toc_e2k8rptanluz\">\u00a0<\/span><\/h2>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The cleanest way to understand the four terms is to separate the format from the environment that executes it.<\/p>\n<table style=\"height: 266px;\" border=\"#fff\" width=\"1999\" cellspacing=\"0\">\n<tbody>\n<tr>\n<th style=\"text-align: center;\">Term<\/th>\n<th style=\"text-align: center;\">What It Actually Refers To<\/th>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Agent Skills<\/td>\n<td style=\"text-align: left; padding: 5px;\">The open format for packaging reusable instructions, scripts, references, assets, and supporting resources.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Claude<\/td>\n<td style=\"text-align: left; padding: 5px;\">Anthropic&#8217;s implementation of the Skill model across Claude products and development environments.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">ChatGPT<\/td>\n<td style=\"text-align: left; padding: 5px;\">OpenAI&#8217;s implementation of reusable workflows inside ChatGPT.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Codex<\/td>\n<td style=\"text-align: left; padding: 5px;\">OpenAI&#8217;s Skill implementation in an environment close to repositories, files, tools, and execution.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The <a href=\"https:\/\/agentskills.io\/specification\" target=\"_blank\" rel=\"noopener\">Agent Skills specification<\/a> requires a SKILL.md file and allows optional directories such as scripts\/, references\/, and assets\/. It also defines metadata that helps an agent decide when a Skill applies.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">That gives the comparison a clearer starting point:<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The specification defines the package. Claude, ChatGPT, and Codex determine how that package runs.<\/p>\n<p data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-19437\" src=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Skill-format-vs-runtime.png?resize=1024%2C682&#038;ssl=1\" alt=\"Skill format vs runtime\" width=\"1024\" height=\"682\" srcset=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Skill-format-vs-runtime.png?resize=1024%2C682&amp;ssl=1 1024w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Skill-format-vs-runtime.png?resize=400%2C266&amp;ssl=1 400w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Skill-format-vs-runtime.png?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Skill-format-vs-runtime.png?w=1336&amp;ssl=1 1336w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">This also prevents another common mix-up. A Skill is not the same thing as an AI agent. It can give an agent reusable operating knowledge, but the surrounding environment still determines which tools, systems, permissions, and actions are available.<\/p>\n<h2 class=\"zw-paragraph heading2\" data-header=\"2\" data-margin-bottom=\"14.94pt\" data-margin-top=\"14.94pt\" data-hd-info=\"2\" data-line-height=\"1.2\">What Do These Skill Systems Have in Common?<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_2wz9uas80ro4&quot;,&quot;name&quot;:&quot;_Tocdmzb9ccl6wc9&quot;}\" data-bookmark-id=\"toc_2wz9uas80ro4\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_2wz9uas80ro4&quot;,&quot;name&quot;:&quot;_Tocdmzb9ccl6wc9&quot;}\" data-bookmark-id=\"toc_2wz9uas80ro4\">\u00a0<\/span><\/h2>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">All of them solve the same underlying problem: package a repeatable way of working so the AI does not need the process rebuilt in every conversation.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">A basic Skill can look like this:<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\">skill-name\/<br class=\"zw-br\" \/>\u251c\u2500\u2500 SKILL.md<br class=\"zw-br\" \/>\u251c\u2500\u2500 scripts\/<br class=\"zw-br\" \/>\u251c\u2500\u2500 references\/<br class=\"zw-br\" \/>\u2514\u2500\u2500 assets\/<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The folder structure matters less than what each layer carries.<\/p>\n<ul data-list-id=\"11243956\" data-list-format=\"{&quot;level0&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;0.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level1&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level2&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level3&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level4&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level5&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level6&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level7&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level8&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}}}\" data-spl-bullet-format=\"{}\">\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"11243956\" data-list-info=\"{&quot;id&quot;:&quot;11243956&quot;,&quot;l&quot;:0}\"><strong>Trigger:<\/strong> Metadata should tell the system what the Skill does and when it should run.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"11243956\" data-list-info=\"{&quot;id&quot;:&quot;11243956&quot;,&quot;l&quot;:0}\"><strong>Process:<\/strong> Instructions should capture the important steps, decision rules, and output expectations.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"11243956\" data-list-info=\"{&quot;id&quot;:&quot;11243956&quot;,&quot;l&quot;:0}\"><strong>Evidence:<\/strong> Reference files can hold policies, schemas, examples, or detailed material.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"11243956\" data-list-info=\"{&quot;id&quot;:&quot;11243956&quot;,&quot;l&quot;:0}\"><strong>Execution:<\/strong> Scripts can handle deterministic work where model judgment adds little value.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"11243956\" data-list-info=\"{&quot;id&quot;:&quot;11243956&quot;,&quot;l&quot;:0}\"><strong>Exceptions:<\/strong> The method should state when the AI needs more information or should return control to a person.<\/p>\n<\/li>\n<\/ul>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-19438\" src=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/anotomy-of-a-reusable-skill.png?resize=1024%2C682&#038;ssl=1\" alt=\"anotomy of a reusable skill\" width=\"1024\" height=\"682\" srcset=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/anotomy-of-a-reusable-skill.png?resize=1024%2C682&amp;ssl=1 1024w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/anotomy-of-a-reusable-skill.png?resize=400%2C266&amp;ssl=1 400w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/anotomy-of-a-reusable-skill.png?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/anotomy-of-a-reusable-skill.png?w=1336&amp;ssl=1 1336w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Anthropic&#8217;s <a href=\"https:\/\/platform.claude.com\/docs\/en\/agents-and-tools\/agent-skills\/overview\" target=\"_blank\" rel=\"noopener\">Skill architecture documentation<\/a> describes progressive disclosure across its Skill architecture. Claude can start with lightweight metadata, load SKILL.md when the Skill becomes relevant, and read deeper resources only when the task calls for them.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">This is also why Claude Code Skills are more than saved prompts. The reusable asset can contain operating knowledge, not just a better instruction.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The same principle applies to the OpenAI implementations. The exact runtime changes, but the useful abstraction stays familiar: keep the repeatable method together and let the environment supply the capabilities needed to execute it.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Teams deciding what is stable enough to package can treat a <a href=\"https:\/\/procreator.design\/blog\/agent-skills-reusable-ai-workflows\/?utm_source=chatgpt.com\">reusable Skill workflow<\/a> as the operating unit, instead of spreading the same method across prompts, documents, and individual habits.<\/p>\n<h2 class=\"zw-paragraph heading2\" data-header=\"2\" data-margin-bottom=\"14.94pt\" data-margin-top=\"14.94pt\" data-hd-info=\"2\" data-line-height=\"1.2\">Claude Skills vs ChatGPT Skills vs Codex Skills: What Actually Changes?<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_5p0k9gp7wev5&quot;,&quot;name&quot;:&quot;_Tocphagl5mnz3rf&quot;}\" data-bookmark-id=\"toc_5p0k9gp7wev5\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_5p0k9gp7wev5&quot;,&quot;name&quot;:&quot;_Tocphagl5mnz3rf&quot;}\" data-bookmark-id=\"toc_5p0k9gp7wev5\">\u00a0<\/span><\/h2>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The biggest differences sit around the Skill, not necessarily inside the core method.<\/p>\n<table style=\"height: 266px;\" border=\"#fff\" width=\"1999\" cellspacing=\"0\">\n<tbody>\n<tr>\n<th style=\"text-align: center;\">Area<\/th>\n<th style=\"text-align: center;\">Claude<\/th>\n<th style=\"text-align: center;\">ChatGPT<\/th>\n<th style=\"text-align: center;\">Codex<\/th>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Runtime<\/td>\n<td style=\"text-align: left; padding: 5px;\">Claude product environment<\/td>\n<td style=\"text-align: left; padding: 5px;\">ChatGPT product environment<\/td>\n<td style=\"text-align: left; padding: 5px;\">Codex environment<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Typical context<\/td>\n<td style=\"text-align: left; padding: 5px;\">Claude workflows, Claude Code, and API use<\/td>\n<td style=\"text-align: left; padding: 5px;\">Workspace, files, apps, and knowledge work<\/td>\n<td style=\"text-align: left; padding: 5px;\">Repositories, files, commands, tools, and engineering workflows<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Distribution<\/td>\n<td style=\"text-align: left; padding: 5px;\">Varies across Claude surfaces<\/td>\n<td style=\"text-align: left; padding: 5px;\">User and workspace installation or sharing<\/td>\n<td style=\"text-align: left; padding: 5px;\">Varies by Codex surface<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Tools and data<\/td>\n<td style=\"text-align: left; padding: 5px;\">Capabilities available to that Claude surface<\/td>\n<td style=\"text-align: left; padding: 5px;\">ChatGPT tools, files, apps, and connected resources<\/td>\n<td style=\"text-align: left; padding: 5px;\">Files, repositories, commands, tools, and integrations<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Permissions<\/td>\n<td style=\"text-align: left; padding: 5px;\">Depend on the Claude environment<\/td>\n<td style=\"text-align: left; padding: 5px;\">Depend on user and workspace settings<\/td>\n<td style=\"text-align: left; padding: 5px;\">Depend on the execution environment<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; padding: 5px;\">Main lock-in risk<\/td>\n<td style=\"text-align: left; padding: 5px;\">Runtime-specific assumptions<\/td>\n<td style=\"text-align: left; padding: 5px;\">Workspace and app assumptions<\/td>\n<td style=\"text-align: left; padding: 5px;\">Repository and execution assumptions<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">OpenAI describes <a href=\"https:\/\/help.openai.com\/en\/articles\/20001066\" target=\"_blank\" rel=\"noopener\">Skills in ChatGPT<\/a> as reusable, shareable workflows that can include instructions, examples, code, reusable steps, and scripts. It also notes that Skills can be supported in Codex and that availability, installation, and syncing can differ by product and surface.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">That last detail matters because a shared Skill structure does not make the surrounding runtime identical.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Claude Code Skills can sit close to project files and development tools. The same method used through another Claude surface may face a different runtime. The reusable workflow remains recognizable, but its access and execution can change.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">OpenAI&#8217;s Agents SDK repositories make the Codex side concrete. Skills such as code-change-verification, docs-sync, implementation-strategy, and pr-draft-summary capture repeatable repository workflows. Codex then uses repository context, commands, files, and project instructions to carry them out. OpenAI documents these examples in its <a href=\"https:\/\/developers.openai.com\/blog\/skills-agents-sdkx\" target=\"_blank\" rel=\"noopener\">Agents SDK Skills workflow<\/a>.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">So &#8220;what&#8217;s actually different?&#8221; has a short answer:<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The method can be similar. The runtime, tools, access, permissions, distribution, and execution context are not.<\/p>\n<h2 class=\"zw-paragraph heading2\" data-header=\"2\" data-margin-bottom=\"14.94pt\" data-margin-top=\"14.94pt\" data-hd-info=\"2\" data-line-height=\"1.2\">How Portable Are Skills Across Claude, ChatGPT &amp; Codex?<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_9vkqfa34hbuu&quot;,&quot;name&quot;:&quot;_Toc83lwuiwvmhw8&quot;}\" data-bookmark-id=\"toc_9vkqfa34hbuu\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_9vkqfa34hbuu&quot;,&quot;name&quot;:&quot;_Toc83lwuiwvmhw8&quot;}\" data-bookmark-id=\"toc_9vkqfa34hbuu\">\u00a0<\/span><\/h2>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">A common format can make a Skill easier to move, but portability has two different meanings.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Format portability asks whether the package can move to another compatible environment.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Behavioral portability asks whether it will still work the same way after it moves.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Those are not the same test.<\/p>\n<p data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-19439\" src=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/fromat-portability-vs-behavioural-portability.png?resize=1024%2C682&#038;ssl=1\" alt=\"fromat portability vs behavioural portability\" width=\"1024\" height=\"682\" srcset=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/fromat-portability-vs-behavioural-portability.png?resize=1024%2C682&amp;ssl=1 1024w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/fromat-portability-vs-behavioural-portability.png?resize=400%2C266&amp;ssl=1 400w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/fromat-portability-vs-behavioural-portability.png?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/fromat-portability-vs-behavioural-portability.png?w=1336&amp;ssl=1 1336w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Take a product-review method:<\/p>\n<ol data-list-id=\"16982616\" data-list-format=\"{&quot;level0&quot;:{&quot;type&quot;:0,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\u0000.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;0.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level1&quot;:{&quot;type&quot;:4,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\u0001.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level2&quot;:{&quot;type&quot;:2,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\u0002.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level3&quot;:{&quot;type&quot;:0,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\u0003.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level4&quot;:{&quot;type&quot;:4,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\u0004.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level5&quot;:{&quot;type&quot;:2,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\u0005.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level6&quot;:{&quot;type&quot;:0,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\u0006.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level7&quot;:{&quot;type&quot;:4,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\u0007.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level8&quot;:{&quot;type&quot;:2,&quot;startsWith&quot;:1,&quot;c&quot;:&quot;\\b.&quot;,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}}}\" data-spl-bullet-format=\"{}\">\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"16982616\" data-list-info=\"{&quot;id&quot;:&quot;16982616&quot;,&quot;l&quot;:0}\">Gather the required evidence.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"16982616\" data-list-info=\"{&quot;id&quot;:&quot;16982616&quot;,&quot;l&quot;:0}\">Apply the review criteria.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"16982616\" data-list-info=\"{&quot;id&quot;:&quot;16982616&quot;,&quot;l&quot;:0}\">Flag failures.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"16982616\" data-list-info=\"{&quot;id&quot;:&quot;16982616&quot;,&quot;l&quot;:0}\">Escalate defined exceptions.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"16982616\" data-list-info=\"{&quot;id&quot;:&quot;16982616&quot;,&quot;l&quot;:0}\">Produce the required output.<\/p>\n<\/li>\n<\/ol>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">That method can travel.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Now add an assumption that a specific shell command exists, a package is pre-installed, files always live at one path, one app is connected, or internet access is available.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The method did not change. The dependency did.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">This is one reason the question &#8220;how do Claude Skills work?&#8221; cannot stop at the contents of SKILL.md. The runtime also determines what the Skill can access and execute.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The same test applies to the ChatGPT and Codex implementations. A workflow tied to a particular app, repository convention, filesystem layout, or permission model may be reusable inside one environment without being portable across products.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">A practical portability review should ask:<\/p>\n<ul data-list-id=\"93152028\" data-list-format=\"{&quot;level0&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;0.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level1&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level2&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level3&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level4&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level5&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level6&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level7&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level8&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}}}\" data-spl-bullet-format=\"{}\">\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"93152028\" data-list-info=\"{&quot;id&quot;:&quot;93152028&quot;,&quot;l&quot;:0}\"><strong>Method:<\/strong> Would the operating process still make sense in another runtime?<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"93152028\" data-list-info=\"{&quot;id&quot;:&quot;93152028&quot;,&quot;l&quot;:0}\"><strong>Dependencies:<\/strong> Which packages, commands, paths, or product features does the workflow assume?<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"93152028\" data-list-info=\"{&quot;id&quot;:&quot;93152028&quot;,&quot;l&quot;:0}\"><strong>Access:<\/strong> Which data sources, apps, files, or systems does it need?<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"93152028\" data-list-info=\"{&quot;id&quot;:&quot;93152028&quot;,&quot;l&quot;:0}\"><strong>Authority:<\/strong> Which actions may the AI recommend, change, or execute?<\/p>\n<\/li>\n<\/ul>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">If the runtime can change without forcing a rewrite of the business method, the Skill has a stronger portability boundary.<\/p>\n<h2 class=\"zw-paragraph heading2\" data-header=\"2\" data-margin-bottom=\"14.94pt\" data-margin-top=\"14.94pt\" data-hd-info=\"2\" data-line-height=\"1.2\">Where Do Skills, MCP, Apps &amp; APIs Fit?<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_6tr5zxcu7az7&quot;,&quot;name&quot;:&quot;_Toc6073corl16q3&quot;}\" data-bookmark-id=\"toc_6tr5zxcu7az7\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_6tr5zxcu7az7&quot;,&quot;name&quot;:&quot;_Toc6073corl16q3&quot;}\" data-bookmark-id=\"toc_6tr5zxcu7az7\">\u00a0<\/span><\/h2>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Skills and access mechanisms solve different parts of the workflow.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The Skill can carry the method. MCP, apps, or APIs can provide the live access and actions that method needs.<\/p>\n<p data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-19440\" src=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/skill-vs-connection-layer.png?resize=1024%2C682&#038;ssl=1\" alt=\"skill vs connection layer\" width=\"1024\" height=\"682\" srcset=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/skill-vs-connection-layer.png?resize=1024%2C682&amp;ssl=1 1024w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/skill-vs-connection-layer.png?resize=400%2C266&amp;ssl=1 400w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/skill-vs-connection-layer.png?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/skill-vs-connection-layer.png?w=1336&amp;ssl=1 1336w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Consider a risk-review workflow.<\/p>\n<ul data-list-id=\"92747423\" data-list-format=\"{&quot;level0&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;0.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level1&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level2&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;1.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level3&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level4&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;2.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level5&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level6&quot;:{&quot;type&quot;:6,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;3.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level7&quot;:{&quot;type&quot;:7,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}},&quot;level8&quot;:{&quot;type&quot;:8,&quot;startsWith&quot;:1,&quot;paraFormat&quot;:{&quot;ml&quot;:&quot;4.5in&quot;,&quot;ti&quot;:&quot;-0.25in&quot;,&quot;textFormat&quot;:{}}}}\" data-spl-bullet-format=\"{}\">\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"92747423\" data-list-info=\"{&quot;id&quot;:&quot;92747423&quot;,&quot;l&quot;:0}\"><strong>Evidence:<\/strong> The Skill specifies which information must be checked.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"92747423\" data-list-info=\"{&quot;id&quot;:&quot;92747423&quot;,&quot;l&quot;:0}\"><strong>Sequence:<\/strong> It defines which checks happen first and which depend on earlier results.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"92747423\" data-list-info=\"{&quot;id&quot;:&quot;92747423&quot;,&quot;l&quot;:0}\"><strong>Exceptions:<\/strong> It identifies conditions that should stop automation or require review.<\/p>\n<\/li>\n<li>\n<p class=\"zw-list zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"0pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-list-id=\"92747423\" data-list-info=\"{&quot;id&quot;:&quot;92747423&quot;,&quot;l&quot;:0}\"><strong>Output:<\/strong> It defines what a completed assessment must contain.<\/p>\n<\/li>\n<\/ul>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The connected layer might supply customer records, transaction history, support data, product information, or permissioned actions.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">This is the useful way to interpret Claude Skills vs MCP. It is less a product contest and more a boundary question: which knowledge belongs in the reusable workflow, and which capability belongs in the connection layer?<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The same logic applies when comparing the open Skill format with MCP. A portable operating method should not need to change simply because the organization switches the system that supplies its data.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">That separation also helps when a Skill becomes part of a broader <a href=\"https:\/\/procreator.design\/blog\/guide-to-ai-agent-architecture-components\/\">AI agent architecture<\/a>. Tools, access, orchestration, observability, and human approval can change without forcing every operating rule into one platform-specific workflow.<\/p>\n<h2 class=\"zw-paragraph heading2\" data-header=\"2\" data-margin-bottom=\"14.94pt\" data-margin-top=\"14.94pt\" data-hd-info=\"2\" data-line-height=\"1.2\">What Creates Lock-In Across Skill Platforms?<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_oe092sfh1oce&quot;,&quot;name&quot;:&quot;_Toc630kl0hfts5c&quot;}\" data-bookmark-id=\"toc_oe092sfh1oce\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_oe092sfh1oce&quot;,&quot;name&quot;:&quot;_Toc630kl0hfts5c&quot;}\" data-bookmark-id=\"toc_oe092sfh1oce\">\u00a0<\/span><\/h2>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Most lock-in does not start with the Skill format. It starts with assumptions that quietly become part of the implementation.<\/p>\n<h3 class=\"zw-paragraph heading3\" data-header=\"3\" data-margin-bottom=\"14.04pt\" data-margin-top=\"14.04pt\" data-hd-info=\"3\" data-line-height=\"1.2\">1. Runtime-Specific Commands<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_6wccda064dm3&quot;,&quot;name&quot;:&quot;_Toccfmsc0te7i8y&quot;}\" data-bookmark-id=\"toc_6wccda064dm3\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_6wccda064dm3&quot;,&quot;name&quot;:&quot;_Toccfmsc0te7i8y&quot;}\" data-bookmark-id=\"toc_6wccda064dm3\">\u00a0<\/span><\/h3>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">A workflow may expect a particular CLI, package manager, shell, or installed library.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The underlying method can remain valid even when that command does not exist elsewhere.<\/p>\n<h3 class=\"zw-paragraph heading3\" data-header=\"3\" data-margin-bottom=\"14.04pt\" data-margin-top=\"14.04pt\" data-hd-info=\"3\" data-line-height=\"1.2\">2. Hard-Coded Paths and Repository Structures<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_elgac8f90ld8&quot;,&quot;name&quot;:&quot;_Tocq50h74hsc1eg&quot;}\" data-bookmark-id=\"toc_elgac8f90ld8\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_elgac8f90ld8&quot;,&quot;name&quot;:&quot;_Tocq50h74hsc1eg&quot;}\" data-bookmark-id=\"toc_elgac8f90ld8\">\u00a0<\/span><\/h3>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">A Skill can assume that configuration, source files, reference material, or documentation always lives at one path.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">That works until the same method runs in another repository or a workspace with a different filesystem model.<\/p>\n<h3 class=\"zw-paragraph heading3\" data-header=\"3\" data-margin-bottom=\"14.04pt\" data-margin-top=\"14.04pt\" data-hd-info=\"3\" data-line-height=\"1.2\">3. Vendor-Specific Tool Logic<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_pyvbfz17ezld&quot;,&quot;name&quot;:&quot;_Tocu8hfeuovhv66&quot;}\" data-bookmark-id=\"toc_pyvbfz17ezld\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_pyvbfz17ezld&quot;,&quot;name&quot;:&quot;_Tocu8hfeuovhv66&quot;}\" data-bookmark-id=\"toc_pyvbfz17ezld\">\u00a0<\/span><\/h3>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">A ChatGPT workflow can depend on resources available inside its workspace. A Codex workflow can depend on repository or execution context. The Claude implementation can depend on capabilities available to a particular product surface.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">If those mechanics are mixed throughout the method itself, migration means rewriting the process instead of replacing an adapter.<\/p>\n<p data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-19441\" src=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Where-Skill-Lock-In-Starts.png?resize=1024%2C682&#038;ssl=1\" alt=\"\" width=\"1024\" height=\"682\" srcset=\"https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Where-Skill-Lock-In-Starts.png?resize=1024%2C682&amp;ssl=1 1024w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Where-Skill-Lock-In-Starts.png?resize=400%2C266&amp;ssl=1 400w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Where-Skill-Lock-In-Starts.png?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/procreator.design\/blog\/wp-content\/uploads\/2026\/09\/Where-Skill-Lock-In-Starts.png?w=1336&amp;ssl=1 1336w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<h3 class=\"zw-paragraph heading3\" data-header=\"3\" data-margin-bottom=\"14.04pt\" data-margin-top=\"14.04pt\" data-hd-info=\"3\" data-line-height=\"1.2\">4. Hidden Access Assumptions<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_y75lfhn65kqi&quot;,&quot;name&quot;:&quot;_Tocatvuqq41crwb&quot;}\" data-bookmark-id=\"toc_y75lfhn65kqi\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_y75lfhn65kqi&quot;,&quot;name&quot;:&quot;_Tocatvuqq41crwb&quot;}\" data-bookmark-id=\"toc_y75lfhn65kqi\">\u00a0<\/span><\/h3>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">A workflow may assume it can reach the internet, read a connected account, install a package, query a system, or modify a file.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Those assumptions need to be explicit because available capabilities can vary by product surface.<\/p>\n<h3 class=\"zw-paragraph heading3\" data-header=\"3\" data-margin-bottom=\"14.04pt\" data-margin-top=\"14.04pt\" data-hd-info=\"3\" data-line-height=\"1.2\">5. Authority Hidden Inside Access<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_f1fbt0c73y5w&quot;,&quot;name&quot;:&quot;_Tock5zwo2gp5jcn&quot;}\" data-bookmark-id=\"toc_f1fbt0c73y5w\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_f1fbt0c73y5w&quot;,&quot;name&quot;:&quot;_Tock5zwo2gp5jcn&quot;}\" data-bookmark-id=\"toc_f1fbt0c73y5w\">\u00a0<\/span><\/h3>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">This is the more consequential form of lock-in.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">A system that can read a record should not automatically inherit permission to change it. A workflow that can recommend an action should not automatically gain authority to execute it.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The method should define the decision boundary. The platform should enforce the permitted action.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">That distinction becomes especially important when the same Skill moves between environments with different permission models.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">For teams making these architecture decisions before implementation, <a href=\"https:\/\/procreator.design\/services\/ai-innovation-strategy?utm_source=chatgpt.com\">AI Innovation Strategy<\/a> can help separate the reusable method from platform dependencies, access rules, and product-specific execution.<\/p>\n<h2 class=\"zw-paragraph heading2\" data-header=\"2\" data-margin-bottom=\"14.94pt\" data-margin-top=\"14.94pt\" data-hd-info=\"2\" data-line-height=\"1.2\">What Should Enterprise Teams Standardize Across AI Skill Platforms?<span data-range-char-type=\"start\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_xuaim4xqg2wn&quot;,&quot;name&quot;:&quot;_Toct04x9upk3vu6&quot;}\" data-bookmark-id=\"toc_xuaim4xqg2wn\">\u00a0<\/span><span data-range-char-type=\"end\" data-bookmark-info=\"{&quot;type&quot;:&quot;bookmark&quot;,&quot;id&quot;:&quot;toc_xuaim4xqg2wn&quot;,&quot;name&quot;:&quot;_Toct04x9upk3vu6&quot;}\" data-bookmark-id=\"toc_xuaim4xqg2wn\">\u00a0<\/span><\/h2>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">The platform is not the durable asset.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Claude Skills, ChatGPT Skills, Codex Skills, and Agent Skills become more useful when the organization separates its operating method from the product that executes it. The method should remain understandable even if the runtime changes.<\/p>\n<p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\">Standardize the evidence the workflow needs, the sequence it follows, the criteria it applies, the exceptions it escalates, and the point where human judgment or another control takes over. Keep commands, integrations, permissions, and access mechanisms outside that core wherever possible.<\/p>\n<p>That is the difference between a workflow that is reusable and one that only works inside one tool. If your team is deciding which AI workflows should become reusable infrastructure and which parts should remain platform-specific, start with a <a href=\"https:\/\/procreator.design\/contact-us\/start-project-primary?utm_source=chatgpt.com\">working session with ProCreator<\/a>.<\/p>\n<h3>FAQs<\/h3>\n<style>#sp-ea-19432 .spcollapsing { height: 0; overflow: hidden; transition-property: height;transition-duration: 300ms;}#sp-ea-19432.sp-easy-accordion>.sp-ea-single {margin-bottom: 10px; border: 1px solid #e2e2e2; }#sp-ea-19432.sp-easy-accordion>.sp-ea-single>.ea-header a {color: #444;}#sp-ea-19432.sp-easy-accordion>.sp-ea-single>.sp-collapse>.ea-body {background: #fff; color: #444;}#sp-ea-19432.sp-easy-accordion>.sp-ea-single {background: #eee;}#sp-ea-19432.sp-easy-accordion>.sp-ea-single>.ea-header a .ea-expand-icon { float: left; color: #444;font-size: 16px;}<\/style><div id=\"sp_easy_accordion-1790166240\"><div id=\"sp-ea-19432\" class=\"sp-ea-one sp-easy-accordion\" data-ea-active=\"ea-click\" data-ea-mode=\"vertical\" data-preloader=\"\" data-scroll-active-item=\"\" data-offset-to-scroll=\"0\"><div class=\"ea-card ea-expand sp-ea-single\"><h3 class=\"ea-header\"><a class=\"collapsed\" id=\"ea-header-194320\" role=\"button\" data-sptoggle=\"spcollapse\" data-sptarget=\"#collapse194320\" aria-controls=\"collapse194320\" href=\"#\" aria-expanded=\"true\" tabindex=\"0\"><i aria-hidden=\"true\" role=\"presentation\" class=\"ea-expand-icon eap-icon-ea-expand-minus\"><\/i> What Are Claude Skills?<\/a><\/h3><div class=\"sp-collapse spcollapse collapsed show\" id=\"collapse194320\" data-parent=\"#sp-ea-19432\" role=\"region\" aria-labelledby=\"ea-header-194320\"> <div class=\"ea-body\"><p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-doc-id=\"5057927000008011008\" data-doc-type=\"writer\">Claude Skills package reusable instructions, workflow knowledge, scripts, references, and supporting resources that Claude can use when a task matches the Skill. The package carries the method, while the Claude product surface determines the available tools, filesystem, network access, permissions, and execution environment.<\/p><\/div><\/div><\/div><div class=\"ea-card sp-ea-single\"><h3 class=\"ea-header\"><a class=\"collapsed\" id=\"ea-header-194321\" role=\"button\" data-sptoggle=\"spcollapse\" data-sptarget=\"#collapse194321\" aria-controls=\"collapse194321\" href=\"#\" aria-expanded=\"false\" tabindex=\"0\"><i aria-hidden=\"true\" role=\"presentation\" class=\"ea-expand-icon eap-icon-ea-expand-plus\"><\/i> How Do Claude Skills Work?<\/a><\/h3><div class=\"sp-collapse spcollapse \" id=\"collapse194321\" data-parent=\"#sp-ea-19432\" role=\"region\" aria-labelledby=\"ea-header-194321\"> <div class=\"ea-body\"><p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-doc-id=\"5057927000008011008\" data-doc-type=\"writer\">Claude can discover a Skill from its metadata, load the full SKILL.md when the task matches, and access supporting references or scripts when needed. This progressive-loading model keeps the core workflow reusable, but the exact behavior still depends on the Claude environment running it.<\/p><\/div><\/div><\/div><div class=\"ea-card sp-ea-single\"><h3 class=\"ea-header\"><a class=\"collapsed\" id=\"ea-header-194322\" role=\"button\" data-sptoggle=\"spcollapse\" data-sptarget=\"#collapse194322\" aria-controls=\"collapse194322\" href=\"#\" aria-expanded=\"false\" tabindex=\"0\"><i aria-hidden=\"true\" role=\"presentation\" class=\"ea-expand-icon eap-icon-ea-expand-plus\"><\/i> What Is the Difference Between Claude Skills and Claude Code Skills?<\/a><\/h3><div class=\"sp-collapse spcollapse \" id=\"collapse194322\" data-parent=\"#sp-ea-19432\" role=\"region\" aria-labelledby=\"ea-header-194322\"> <div class=\"ea-body\"><p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-doc-id=\"5057927000008011008\" data-doc-type=\"writer\">Claude Code Skills are Skills used specifically inside Claude Code. They can sit close to project files, repositories, commands, and local development tools. Other Claude surfaces can use Skills through different runtime and distribution models, so teams should not assume the same access or execution behavior everywhere.<\/p><\/div><\/div><\/div><div class=\"ea-card sp-ea-single\"><h3 class=\"ea-header\"><a class=\"collapsed\" id=\"ea-header-194323\" role=\"button\" data-sptoggle=\"spcollapse\" data-sptarget=\"#collapse194323\" aria-controls=\"collapse194323\" href=\"#\" aria-expanded=\"false\" tabindex=\"0\"><i aria-hidden=\"true\" role=\"presentation\" class=\"ea-expand-icon eap-icon-ea-expand-plus\"><\/i> Are ChatGPT Skills and Codex Skills the Same?<\/a><\/h3><div class=\"sp-collapse spcollapse \" id=\"collapse194323\" data-parent=\"#sp-ea-19432\" role=\"region\" aria-labelledby=\"ea-header-194323\"> <div class=\"ea-body\"><p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-doc-id=\"5057927000008011008\" data-doc-type=\"writer\">They share the reusable-workflow model, but they run in different product contexts. ChatGPT centers the workflow around workspace resources, files, apps, and sharing controls. Codex places the workflow closer to repositories, commands, tools, files, and execution-heavy engineering work.<\/p><\/div><\/div><\/div><div class=\"ea-card sp-ea-single\"><h3 class=\"ea-header\"><a class=\"collapsed\" id=\"ea-header-194324\" role=\"button\" data-sptoggle=\"spcollapse\" data-sptarget=\"#collapse194324\" aria-controls=\"collapse194324\" href=\"#\" aria-expanded=\"false\" tabindex=\"0\"><i aria-hidden=\"true\" role=\"presentation\" class=\"ea-expand-icon eap-icon-ea-expand-plus\"><\/i> Can the Same Skill Work Across Claude, ChatGPT and Codex?<\/a><\/h3><div class=\"sp-collapse spcollapse \" id=\"collapse194324\" data-parent=\"#sp-ea-19432\" role=\"region\" aria-labelledby=\"ea-header-194324\"> <div class=\"ea-body\"><p class=\"zw-paragraph heading0\" data-header=\"0\" data-textformat=\"{&quot;size&quot;:&quot;12.00&quot;,&quot;fgc&quot;:&quot;rgb(0, 0, 0)&quot;,&quot;type&quot;:&quot;text&quot;}\" data-margin-bottom=\"12pt\" data-margin-top=\"12pt\" data-hd-info=\"0\" data-line-height=\"1.2\" data-doc-id=\"5057927000008011008\" data-doc-type=\"writer\">It can carry over when the core method follows a compatible structure and avoids unnecessary runtime assumptions. Teams still need to check commands, packages, paths, tools, permissions, integrations, network access, and approval rules before assuming the same Skill will behave identically.<\/p><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Four terms are starting to blur into one another. That is creating a bigger architecture problem than the naming suggests. Claude Skills, ChatGPT Skills, Codex Skills, and Agent Skills are related, but they do not describe four competing versions of the same feature. The confusion starts when teams mix the reusable workflow format with the [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":19434,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-19429","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/posts\/19429","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/comments?post=19429"}],"version-history":[{"count":6,"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/posts\/19429\/revisions"}],"predecessor-version":[{"id":19442,"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/posts\/19429\/revisions\/19442"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/media\/19434"}],"wp:attachment":[{"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/media?parent=19429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/categories?post=19429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/procreator.design\/blog\/wp-json\/wp\/v2\/tags?post=19429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}