Implement ServiceStack JsonServiceClient for Zig

[Copilot]

Adds a JsonServiceClient for Zig to consume ServiceStack APIs with strongly-typed DTOs.

Core Implementation

• src/client.zig (196 lines): HTTP client supporting GET, POST, PUT, DELETE, PATCH with JSON serialization
• Returns json.Parsed(T) for explicit memory ownership - callers must defer parsed.deinit()
• Configurable max response size and timeout (timeout currently unused by std.http)
• Uses Content-Length header instead of chunked encoding for JSON payloads

Build & Infrastructure

• build.zig: Standard library, tests, and example builds
• build.zig.zon: Package metadata for dependency management
• .github/workflows/ci.yml: CI with minimal permissions

Examples & Documentation

• 3 examples (517 lines): basic usage, advanced patterns, comprehensive DTO library
• 5 documentation files (1,163 lines): README, quickstart, usage guide, DTO creation guide, contributing

Usage

var client = try JsonServiceClient.init(allocator, "https://api.example.com");
defer client.deinit();

const parsed = try client.post(HelloResponse, "/hello", request);
defer parsed.deinit();
const response = parsed.value;

DTOs are plain Zig structs matching ServiceStack contracts. See ADD_SERVICESTACK_REFERENCE.md for type mappings and patterns.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• canonical-bos01.cdn.snapcraftcontent.com
  • Triggering command: /usr/lib/snapd/snapd (dns block)
• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)
• ziglang.org
  • Triggering command: wget REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Creating a ServiceStack JsonServiceClient for the Zig programming language that uses the Zig Add ServiceStack Language DTOs to make API Requests

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