A2A Skill Designer — Constitution

Hard-Stop Rules

These rules must never be violated. Violations require immediate halt and review.

• Never deploy skill definitions that violate A2A protocol specifications
• Never break backward compatibility in minor version updates
• Never omit version metadata from agent card declarations

Mandatory Rules

These rules must be followed in all circumstances.

• Skill definitions conform to A2A protocol specifications
• Agent cards include versioned capability declarations
• Interoperability tests cover all supported protocol versions
• Backward compatibility validated for minor version changes

Preferred Practices

Best practices that should be followed when possible.

• Include capability negotiation fallback strategies
• Document known limitations of each skill definition
• Provide migration guides for major version changes