structcast

Instantiate Python objects from YAML/JSON configurations using Jinja2 templates.

Updated Jan 30, 2026
One-click install
npx skills add https://github.com/f6ra07nk14/structcast --skill structcast
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: structcast
Source: https://github.com/f6ra07nk14/structcast/tree/main
Command: npx skills add https://github.com/f6ra07nk14/structcast --skill structcast

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires jinja2, pydantic, ruamel-yaml, typing-extensions, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill streamlines the process of converting static configuration files (YAML/JSON) into live Python objects, simplifying complex data orchestration tasks.

Core Features & Use Cases

  • Object Instantiation: Build Python objects from declarative patterns without writing factory code.
  • Data Access & Reshaping: Navigate and transform nested data structures using intuitive path notations.
  • Dynamic Configuration: Embed Jinja2 templates for generating configurations at runtime with built-in security.
  • Use Case: Define your application's configuration, database models, or API schemas in YAML, and let StructCast instantiate them safely and efficiently.

Quick Start

Use the structcast skill to instantiate a list object from a configuration.

Frequently Asked Questions about structcast

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I instantiate Python objects from YAML configuration files?

To instantiate Python objects from YAML configuration files, you can use declarative data orchestration to map static configuration patterns directly to live objects without writing custom factory code. StructCast builds objects safely from declarative definitions.

Can I use Jinja2 templates for dynamic configuration generation in Python?

Yes, you can use Jinja2 templates for dynamic configuration generation in Python by embedding them within your YAML or JSON structures. The configuration is processed at runtime with built-in security through sandboxed execution to prevent unsafe evaluation.

Does Pydantic validate object instantiation from declarative YAML patterns?

Yes, Pydantic validates object instantiation from declarative YAML patterns by enforcing strict type checking during the conversion process. This ensures that static configuration data is securely validated before becoming live Python objects.

What is the best way to access nested data structures using path notation in Python?

The best way to access nested data structures using path notation in Python is through declarative data orchestration libraries that support intuitive path strings. This allows you to navigate, access, and reshape complex nested configurations without deep manual traversal.

How does sandboxed execution secure dynamic configuration rendering?

Sandboxed execution secures dynamic configuration rendering by validating imports and attributes within a restricted environment before evaluating Jinja2 templates. This prevents unauthorized code execution during the runtime generation of YAML or JSON configurations.