input-validation-checker

Input Validation Checker - Auto-activating skill for Security Fundamentals. Triggers on: input validation checker, input validation checker Part of the Security Fundamentals skill category.

1.09x

Quality

Does it follow best practices?

Impact

96%

1.09x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./planned-skills/generated/03-security-fundamentals/input-validation-checker/SKILL.md

Evaluation results

98%

User Registration API Validation

npm-based input validation with OWASP patterns

Criteria

Without context

With context

Uses npm validation library

100%

package.json present

100%

Email format validation

100%

Password strength check

100%

Username whitelist / type constraint

100%

Input length limits

44%

100%

Structured error response

100%

Validation module separated

100%

OWASP alignment mentioned

100%

Step-by-step explanation

100%

No raw password stored

50%

75%

Without context: $0.4965 · 2m 17s · 27 turns · 28 in / 6,976 out tokens

With context: $0.5186 · 2m 14s · 27 turns · 26 in / 7,298 out tokens

100%

Hardening the Login Flow

Authentication input validation and secure coding

Criteria

Without context

With context

Reusable validator module

100%

Username/email format check

100%

Password length constraint

70%

100%

Input size / payload limit addressed

100%

Email validation on reset

100%

Validation before DB lookup

100%

Production-ready error handling

100%

Step-by-step guide

100%

Security reasoning provided

100%

Industry standard referenced

70%

100%

Without context: $0.3966 · 1m 52s · 20 turns · 20 in / 6,321 out tokens

With context: $0.6044 · 2m 37s · 27 turns · 284 in / 9,468 out tokens

90%

10%

Security Audit: Contact Form Backend

Vulnerability detection in input handling code

Criteria

Without context

With context

SQL injection identified

100%

SQL injection fixed

100%

XSS vector identified

100%

XSS vector fixed

100%

Input format validation added

100%

Input length limits applied

100%

Uses npm package for sanitisation or validation

100%

Structured audit report

100%

Industry standard or risk classification referenced

Production-ready fixed code

100%

Without context: $0.4394 · 2m 8s · 22 turns · 23 in / 7,253 out tokens

With context: $0.4821 · 2m 9s · 25 turns · 23 in / 7,119 out tokens

Repository: jeremylongshore/claude-code-plugins-plus-skills
Commit: 994edc4

Evaluated: 18 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

User Registration API Validation Hardening the Login Flow Security Audit: Contact Form Backend

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