Swift: Contract Implementation Rules

Language skill for Swift.

Apply the specification within the context of the calling skill. Do not restate the content — use it for decision-making.

Invoked via the goga-lang-disp router.

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Examples

Complete CODEMANIFEST example for Swift covering all DSL constructs:

Imports:
  - Types:
      - NetworkService
      - SessionConfig AS Config
    Usages:
      - authentication
    From: path/to/network_cell

Usages:
  conventions: .goga/usages/swift_conventions.md
  pattern: |
    Use value types (struct) by default. Use reference types (class) only when identity or shared mutation is required.
  testing: |
    Use XCTest. Each public method must have test coverage.

Annotations: |
  Use `conventions` for code style.
  Use `testing` for test requirements.
  Use `authentication` from Imports for auth token handling.

  Prefer `struct` over `class` unless reference semantics are needed.

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"parseInput(input: String) -> data: Data":
  location: Parser.swift
  annotations: |
    Parse raw input string into structured data.

    `input`: raw string to parse

    Use `pattern` for implementation.

"NetworkManager(baseURL: String)":
  location: NetworkManager.swift
  annotations: |
    Network client for API communication.

    `baseURL`: root URL for all API requests

    Use `authentication` from Imports for request signing.
    Use `conventions` for code style.
  properties:
    "baseURL -> String": |
      Root URL for API requests.
    "isConnected -> Bool": |
      Current connection status.
  methods:
    "fetchData(endpoint: String) -> response: Promise<Data>": |
      Fetch data from the specified endpoint.

      `endpoint`: API endpoint path
      `response`: async response data

      Use `pattern` for implementation.
    "cancelPendingRequests()": |
      Cancel all in-flight requests.

"NetworkService::AuthenticatedService(token: String)":
  location: AuthService.swift
  annotations: |
    Authenticated service extending NetworkService with token-based auth.

    `token`: authentication token

    Use `authentication` from Imports for token refresh logic.

->NetworkService: {}

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Author: Goga
CreatedAt: 22/05/26
Description: |
  Example CODEMANIFEST demonstrating all DSL constructs for Swift.

Cell

A cell is a module:

cell/
├── CODEMANIFEST
├── *.swift

Language Features

Facade: only declarations with the public access modifier constitute the Facade. internal (the default access level) and private declarations are excluded from the Contract.

Naming: camelCase for functions and properties, PascalCase for types.

Value types: struct defines a Value Type, class defines a Reference Type. Select based on entity Semantics.

Optionals: T? denotes an Optional. Represent as T? in CODEMANIFEST.

Protocol: protocols define interfaces — map to Entity with methods only, excluding properties.

Construct Mapping

Swift	CODEMANIFEST	Note
public class / public struct	Entity	Init parameters → Entity Signature
public func (top-level)	Routine
public var / public let	Property	Type from declaration
public func (method)	Method
public protocol	Entity	Methods only, no properties
init parameters	Entity Signature

Implementation

• Public API must use public
• Use class/struct depending on semantics

Signature Rules

Allowed:

String, Int, Double, Bool
[T]
[String: T]
T?

Forbidden:

Any
UnsafePointer
inout

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