v2.48.2

rtk-ai/rtkv2.48.2Mar 25, 2026by github-actions[bot]

AI Summary

Introduces parallel crawl backends, allowing users to race alternative browser engines like LightPanda and Servo alongside their primary crawl to ensure the best HTML output.

Key Highlights

Parallel Crawl Backends feature
Race alternative browser engines (LightPanda, Servo, Custom)
Quality validator for choosing the best HTML
Zero overhead when disabled

New Features

ParallelBackendsConfig
BackendEngine::LightPanda
BackendEngine::Servo
BackendEngine::Custom
backend_source attribute

Full Release Notes

Race alternative browser engines alongside your primary crawl. Best HTML wins.

```rust
use spider::configuration::{BackendEndpoint, BackendEngine, ParallelBackendsConfig};

let mut website = Website::new("https://example.com");
website.configuration.parallel_backends = Some(ParallelBackendsConfig {
    backends: vec![BackendEndpoint {
        engine: BackendEngine::LightPanda,
        endpoint: Some("ws://127.0.0.1:9222".to_string()),
        binary_path: None,
        protocol: None,
    }],
    ..Default::default()
});
website.crawl().await;
// page.backend_source → "primary" | "lightpanda" | "servo" | "custom"
```

Features: `lightpanda`, `servo`, `parallel_backends_full`, custom backends via `BackendEngine::Custom`.

Zero overhead when disabled, anti-fingerprint jitter, auto-disable on failures, custom quality validator, full network interception parity with Chrome.