name: validation description: > Defines and applies input validation rules to ensure all external inputs are checked before business logic execution, following constraints in agents.md.

Skill: Input Validation

Purpose

Ensure all external inputs are validated before processing.

When to Use

• Handling user or external input
• Accepting request parameters or payloads

Inputs

• Input fields
• Validation rules
• Constraints and limits

Outputs

• Validation logic
• Clear validation failure responses

Governing Rules

Validation must align with Security and Error Handling guidelines in agents.md.

Procedure

1. Identify all external inputs
2. Define validation rules for each input
3. Fail fast on invalid data
4. Provide clear error messages

Failure Handling

• Stop execution on validation failure
• Do not proceed to business logic