accordant-state Skill

Source

• Creator: microsoft
• Repository: microsoft/accordant
• Skill file: agent/skills/state/SKILL.md

What it does

How to design state models in Accordant - use this skill when defining what your system tracks between operations

Skill instructions

Designing State in Accordant State is what an external observer needs to know to predict what an operation should return. Keep it minimal — only track what's necessary to define correct behavior. The [State] Attribute Use [State] on a partial class to get automatic cloning, equality, and hashing: csharp [State] public partial class BankState { public Dictionary<string, decimal Accounts { get; set; } = new(); } The source generator handles: - Deep cloning for immutable state transitions - Equality comparison for state deduplication - Hashing for state graph exploration State Design Principles Keep It Minimal Ask: "Does any operation need this to determine its response?" If no, leave it out. csharp // ❌ Too detailed - includes implementation concerns [State] public partial class BadState { public Dictionary<string, AccountEntity Accounts { get; set; } // EF entities public DateTime LastModified { get; set; } // Not needed for behavior public string ConnectionString { get; set; } // Imple