potato-spec 0.20.0

YAML spec loader for potato-head agents and workflows
Documentation 
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use serde::Deserialize;

#[derive(Debug, Deserialize)]
pub struct PotatoSpec {
    #[serde(default)]
    pub agents: Vec<AgentSpec>,
    #[serde(default)]
    pub workflows: Vec<WorkflowSpec>,
}

#[derive(Debug, Deserialize, Clone)]
pub struct AgentSpec {
    pub id: String,
    pub provider: String,
    pub model: Option<String>,
    pub system_prompt: Option<String>,
    pub max_iterations: Option<u32>,
    pub memory: Option<MemorySpec>,
    #[serde(default)]
    pub criteria: Vec<CriteriaSpec>,
    #[serde(default)]
    pub callbacks: Vec<CallbackSpec>,
    #[serde(default)]
    pub tools: Vec<ToolRef>,
}

#[derive(Debug, Deserialize, Clone)]
#[serde(tag = "type", rename_all = "snake_case")]
pub enum MemorySpec {
    InMemory,
    Windowed { window_size: usize },
}

#[derive(Debug, Deserialize, Clone)]
#[serde(tag = "type", rename_all = "snake_case")]
pub enum CriteriaSpec {
    MaxIterations { max: u32 },
    Keyword { keyword: String },
    StructuredOutput { schema: Option<serde_json::Value> },
}

#[derive(Debug, Deserialize, Clone)]
#[serde(untagged)]
pub enum CallbackSpec {
    BuiltIn {
        #[serde(rename = "type")]
        kind: String,
    },
    Named {
        name: String,
    },
}

#[derive(Debug, Deserialize, Clone)]
pub struct ToolRef {
    pub name: String,
}

#[derive(Debug, Deserialize, Clone)]
#[serde(tag = "type", rename_all = "snake_case")]
pub enum WorkflowSpec {
    Sequential {
        id: String,
        pass_output: Option<bool>,
        steps: Vec<StepSpec>,
    },
    Parallel {
        id: String,
        merge_strategy: Option<MergeStrategySpec>,
        steps: Vec<StepSpec>,
    },
    Workflow {
        id: String,
        tasks: Vec<TaskSpec>,
    },
}

impl WorkflowSpec {
    pub fn id(&self) -> &str {
        match self {
            Self::Sequential { id, .. } => id,
            Self::Parallel { id, .. } => id,
            Self::Workflow { id, .. } => id,
        }
    }
}

#[derive(Debug, Deserialize, Clone)]
#[serde(untagged)]
pub enum StepSpec {
    Ref {
        #[serde(rename = "ref")]
        agent_ref: String,
    },
    Inline(AgentSpec),
}

#[derive(Debug, Deserialize, Clone, Default)]
#[serde(rename_all = "snake_case")]
pub enum MergeStrategySpec {
    #[default]
    CollectAll,
    First,
}

#[derive(Debug, Deserialize, Clone)]
pub struct TaskSpec {
    pub id: String,
    pub agent: String,
    pub prompt: String,
    #[serde(default)]
    pub dependencies: Vec<String>,
    pub max_retries: Option<u32>,
}