turborepo-unescape

Purpose

Provides UnescapedString, a marker type for biome-parsed JSON strings that handles escape sequence processing. This exists because biome's JSON parser doesn't process escape sequences (see biome#1596).

Architecture

JSON with escapes (e.g., "hello\nworld")
        │
        ▼
┌─────────────────────────────┐
│   biome_deserialize         │  ← Parses JSON, but leaves escapes as-is
└─────────────────────────────┘
        │
        ▼
┌─────────────────────────────┐
│   UnescapedString           │  ← Wraps string in quotes, uses serde_json
│   (Deserializable impl)     │     to process escapes like \n, \t, \uXXXX
└─────────────────────────────┘
        │
        ▼
    Properly unescaped String

The type implements Deref<Target=String>, so it can be used anywhere a String is expected. It's also transparent for serde, JSON Schema, and TypeScript generation.

Notes

• Use UnescapedString instead of String in biome-deserialized config structs where escape sequences may appear
• The unescape logic wraps the raw string in quotes and re-parses with serde_json to leverage its escape handling
• Marked #[serde(transparent)] so it serializes/deserializes as a plain string