swift-codable-decode-diagnosis

What problem does it solve?

Decoding JSON with Swift's Codable often produces vague localizedDescription errors, obscuring the exact key path and failing context. This Skill surfaces the precise decoding path to accelerate root-cause analysis and fix data-model mismatches.

Core Features & Use Cases

• Standalone Swift script that prints the full coding path when a DecodingError is thrown, including keyNotFound, typeMismatch, and valueNotFound scenarios.
• Reproduces and pinpoints the failed path in Container-like wrapper models, enabling quick fixes in data models or JSON payloads.
• Useful for CI checks and debugging sessions where granular error paths speed up diagnosis.

Quick Start

Run the provided Swift script to print the detailed decoding path for a failing JSON payload.