greentic

Built-in Processes in Greentic

This guide explains the built-in process nodes available in Greentic and how to use them in your flows.

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🛠️ Available Built-in Processes

pub enum BuiltInProcess {
    Debug(DebugProcessNode),
    Script(ScriptProcessNode),
    Template(TemplateProcessNode),
    #[serde(rename = "qa")]
    Qa(QAProcessNode),
    Plugin { name: String, #[serde(skip)] path: PathBuf },
}

---

🐞 debug

A debugging process that lets you inspect message input/state.

Example

debug_process:
  debug:
    print: false  # logs only (no CLI output)

• print: true → logs + prints to CLI

---

📜 script

A Rhai scripting process that can transform messages, payloads, and state.

Supported variables:

• msg: full message object
• payload: parsed input
• state: state context (keys are exposed directly too)

Output: value is wrapped as { "output": ... }

Structured Output with Routing (via __greentic):

return #{
    __greentic: {
        payload: #{ status: "ok" },
        out: ["next_node"]
    }
};

See full documentation in the Rhai section of this file.

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🧩 template

A Handlebars-based template processor for rendering string output.

Supported context:

• msg, payload, state

Example:

Hello , today is .

• Control flow (if, each) supported
• See Handlebars docs for more details

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❓ qa

A dynamic, multi-question form-like process with optional validation and routing.

Supported answer types:

• text (with optional max_words, regex)
• number (with optional range validation)
• choice (predefined options)
• date (with dialect, max_words)
• llm (open-ended, always interpreted by LLM)

Routing based on answers:

routing:
  - condition:
      less_than:
        question_id: "age"
        threshold: 18
    to: "minor_flow"

  - to: "adult_flow"

LLM Fallbacks:

Triggered when answers don’t meet constraints (e.g., too many words, invalid number).

fallback_agent:
  task: "Reformat answer into a number."

Example Node

ask_user:
  qa:
    welcome_template: "Hi! Let's get started."
    questions:
      - id: "name"
        prompt: "What’s your name?"
        answer_type: text
        state_key: "user_name"

      - id: "age"
        prompt: "How old are you?"
        answer_type: number
        state_key: "user_age"
        validate:
          range:
            min: 0
            max: 120

    routing:
      - condition:
          less_than:
            question_id: "age"
            threshold: 18
        to: "underage"
      - to: "main_process"

Answers are stored in state and passed on as a unified object.

---

🧩 plugin

A dynamically loaded process node compiled as .wasm, located at /plugins/<name>.wasm.

my_plugin_step:
  plugin: "my_plugin"

Used for extending the platform with custom functionality.

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