{"data":{"id":"41d7e813-62ae-484d-94c2-a00228de047b","title":"Skills in OpenAI API","summary":"OpenAI now allows developers to use Skills (reusable code packages) directly in the OpenAI API through a shell tool, with the ability to upload Skills as compressed files or send them inline as base64-encoded zip data (a way of encoding binary files as text) within JSON requests. The example shows how to create an API call that uses a custom skill to count words in a file, making it easier to extend AI capabilities with custom tools.","solution":"N/A -- no mitigation discussed in source.","labels":["industry"],"sourceUrl":"https://simonwillison.net/2026/Feb/11/skills-in-openai-api/#atom-everything","publishedAt":"2026-02-11T19:19:22.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":["OpenAI"],"affectedVendorsRaw":["OpenAI","Claude"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":null,"aiComponentTargeted":"api","llmSpecific":true,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}