Union type creation

Tagged union pattern

Object type definitions

Validation execution

Nested object validation

Type inference

Codec definition

decode() usage

Either handling

Error formatting

Decoder module import

Individual decoder creation

Field extraction decoders

Applicative composition usage

Error accumulation

Base decoder usage

Refinement with refine

Custom error messages

Decoder composition

Either handling

Error extraction

Uses t.recursion

Handles mutual recursion

Uses t.type

Uses t.literal

Uses t.array

Type extraction

Root codec creation

User object codec

Settings nested structure

Literal union types

Array codecs

Address nested codec

Social connection codec

Validation execution

Result handling

Uses t.keyof

Defines allowed keys

Single key validation

Object validation

Returns Either types

Codec module import

Date codec implementation

Boolean/literal codec

Struct codec composition

Codec type annotation

Decode method usage

Encode method usage

Validation error handling

Schema Module Import

Decoder Import

Guard Import

Schema Definition

Struct Combinator

Union for Category

Refinement for Price

Decoder Interpretation

Guard Interpretation

Decoder definition

Refinement validation

Kleisli composition

Either handling

Transformation steps

Error reporting