Masks PAN/card numbers with Luhn validation and type detection.
npx skills add https://github.com/ekaone/mask-card --skill mask-card
Please help me install this Agent Skill. Skill: mask-card Source: https://github.com/ekaone/mask-card/tree/main/.cursor/skills/mask-card Command: npx skills add https://github.com/ekaone/mask-card --skill mask-card
Maintains the @ekaone/mask-card TypeScript library for masking PAN/credit card numbers to protect sensitive information in displays and logs, aligning with PCI display guidance (first 6 + last 4) and supporting docs, examples, tests, and builds.
Install the library and call maskCard with a card number to see a masked result.
High-intent search queries and answers about installing and using this skill.
To mask credit card numbers for display, call the maskCard function with a card number string, which returns a display-safe result showing the last four digits by default while hiding the rest.
PCI-DSS compliant masked PAN display follows the first six and last four digits format, which this library supports through configurable masking behavior and security-focused defaults.
Yes, the library includes Luhn validation through the isValidCardLuhn and isValidCard functions to verify credit card number integrity before or after masking operations.
Card-type detection uses the detectCardType function, and getCardTypeGrouping returns formatting groups to drive display logic for different card brands.
Use the maskCardBatch function to process multiple credit card numbers simultaneously, returning display-safe masked results suitable for analytics and logging workflows.
No, this is a zero-dependency TypeScript library, so you can install and use it directly without adding any external packages to your project.
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