Function extractVersionFromSchemaURL

internal/validators/schema.go:25–34

extractVersionFromSchemaURL extracts the version identifier from a schema URL e.g., "https://static.modelcontextprotocol.io/schemas/2025-10-17/server.schema.json" -> "2025-10-17" e.g., "https://static.modelcontextprotocol.io/schemas/draft/server.schema.json" -> "draft" Version identifier can contain

(schemaURL string)

// e.g., "https://static.modelcontextprotocol.io/schemas/draft/server.schema.json" -> "draft"
// Version identifier can contain: A-Z, a-z, 0-9, hyphen (-), underscore (_), tilde (~), and period (.)
func extractVersionFromSchemaURL(schemaURL string) (string, error) {
	// Pattern: /schemas/{identifier}/server.schema.json
	// Identifier allowed characters: A-Z, a-z, 0-9, -, _, ~, .
	re := regexp.MustCompile(`/schemas/([A-Za-z0-9_~.-]+)/server\.schema\.json`)
	matches := re.FindStringSubmatch(schemaURL)
	if len(matches) < 2 {
		return "", fmt.Errorf("invalid schema URL format: %s", schemaURL)
	}
	return matches[1], nil
}

// loadSchemaByVersion loads a schema file from the embedded filesystem by version
func loadSchemaByVersion(version string) ([]byte, error) {