Anthropic · Schema

SkillVersion

LLMAnthropicArtificial IntelligenceClaudeFoundation ModelsMachine LearningMCPAgents

Properties

Name Type Description
created_at string ISO 8601 timestamp of when the skill was created.
description string Description of the skill version. This is extracted from the SKILL.md file in the skill upload.
id string Unique identifier for this Skill Version. The id addresses the version in paths and pins it in references.
name string The Skill's immutable kebab-case slug, set at creation from the first upload's SKILL.md frontmatter `name` (or its enclosing directory). Every later upload must resolve to the same value. Also the top
skill_id string Unique identifier for the skill. The format and length of IDs may change over time.
type string Object type. For Skill Versions, this is always `"skill_version"`.
View JSON Schema on GitHub

JSON Schema

anthropic-skill-version-schema.json Raw ↑
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/anthropic/main/json-schema/anthropic-skill-version-schema.json",
  "title": "SkillVersion",
  "x-generated": "2026-09-23",
  "x-method": "derived",
  "x-generator": "derive-json-schema.py",
  "x-source": "openapi/anthropic-skills-api-openapi.yml#/components/schemas/SkillVersion",
  "properties": {
    "created_at": {
      "type": "string",
      "format": "date-time",
      "title": "Created At",
      "description": "ISO 8601 timestamp of when the skill was created."
    },
    "description": {
      "type": "string",
      "title": "Description",
      "description": "Description of the skill version.\n\nThis is extracted from the SKILL.md file in the skill upload."
    },
    "id": {
      "type": "string",
      "title": "Id",
      "description": "Unique identifier for this Skill Version. The id addresses the version in\npaths and pins it in references."
    },
    "name": {
      "type": "string",
      "title": "Name",
      "description": "The Skill's immutable kebab-case slug, set at creation from the first\nupload's SKILL.md frontmatter `name` (or its enclosing directory). Every\nlater upload must resolve to the same value. Also the top-level directory\nof the Skill's mounted files and the base name of a downloaded archive."
    },
    "skill_id": {
      "type": "string",
      "title": "Skill Id",
      "description": "Unique identifier for the skill.\n\nThe format and length of IDs may change over time."
    },
    "type": {
      "type": "string",
      "const": "skill_version",
      "title": "Type",
      "description": "Object type.\n\nFor Skill Versions, this is always `\"skill_version\"`.",
      "default": "skill_version"
    }
  },
  "type": "object",
  "required": [
    "created_at",
    "description",
    "id",
    "name",
    "skill_id",
    "type"
  ]
}

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