file-validator

Validate file formats and content integrity with extension whitelisting and size limits.

3|1|Updated Feb 1, 2026
One-click install
npx skills add https://github.com/dgriffin831/clawhub-skills --skill file-validator
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: file-validator
Source: https://github.com/dgriffin831/clawhub-skills/tree/main/skill-scan/test-fixtures/safe-file-validator
Command: npx skills add https://github.com/dgriffin831/clawhub-skills --skill file-validator

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Validates file formats and checks content integrity to prevent unsafe or invalid uploads from affecting systems or workflows.

Core Features & Use Cases

  • Format validation to ensure files conform to expected extensions and types.
  • Content integrity checks to detect tampered or malformed data before processing.
  • Safe file operations including controlled path handling and minimal permission requirements for secure deployments.

Quick Start

Use the file-validator to verify a sample file like 'report.txt' for allowed extensions and safe size constraints.

Frequently Asked Questions about file-validator

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I validate file uploads for safe extensions and size limits in Python?

To validate file uploads safely, enforce extension whitelisting, apply size limits, and perform basic MIME-type checks. This ensures only approved files are accepted and inspected before entering ingestion pipelines or workflows.

What is file content validation and when do I need it for data ingestion pipelines?

File content validation detects tampered or malformed data before processing. You need it in data ingestion pipelines to ensure data integrity and prevent unsafe uploads from affecting downstream systems or workflows.

How do I check MIME types and enforce extension whitelisting for uploaded files?

Check MIME types and enforce extension whitelisting by applying controlled path handling and size constraints. This format validation confirms files conform to expected types and prevents invalid uploads from affecting systems.

Can I use safe path handling to secure file uploads in ingestion pipelines?

Yes, you can secure file uploads using safe path handling with minimal permission requirements. This controlled approach protects ingestion pipelines by ensuring only inspected, approved files are accepted into the system.

What are the limitations of basic file format validation for security?

Basic file format validation limits checks to extension whitelisting, size limits, and basic MIME-type inspection. It does not provide deep content scanning, so sophisticated malicious payloads might bypass these initial data integrity checks.