@memberjunction/remote-browser-steel

The Steel (steel.dev) backend driver for the MemberJunction Remote Browser channel.

Steel is a browser-as-a-service: a CDP connect endpoint plus a hosted session viewer (with human takeover), stealth, proxy egress, session recording, persistent contexts, multi-tab, downloads, and CAPTCHA solving — but no first-party AI-control harness. Steel sessions are driven by MJ's own computer-use control (or OSS Stagehand-over-CDP). This package contributes the SteelRemoteBrowser driver that the channel resolves for the "Steel" provider metadata row.

How trivial the driver is

All Remote Browser backends drive the page identically over CDP — the shared @memberjunction/remote-browser-cdp kit owns that entire control path (action translation, capability gating, screencast, human takeover, Connect/Disconnect, teardown). A driver subclasses BaseCdpRemoteBrowserProvider and fills in just one hook:

protected async AcquireSession(ctx): Promise<{ CdpEndpoint: string; Backend: ICdpSessionBackend }>

SteelRemoteBrowser.AcquireSession calls the client's CreateSession and returns its CDP endpoint plus a small ICdpSessionBackend:

| Backend hook | Steel mapping | | --- | --- | | GetLiveViewUrl() | the hosted session-viewer URL from CreateSession | | InvokeNativeAIControl(intent) | throws RemoteBrowserCapabilityNotSupportedError('NativeAIControl', 'Steel') — no first-party AI harness | | Release() | client.ReleaseSession(...) |

Capabilities

Mirrors the "Steel" seed row's SupportedFeatures: LiveView, HumanTakeover, ScreenStreaming, Stealth, ProxyEgress, SessionRecording, PersistentContext, MultiTab, FileDownloads, CaptchaSolving (plus RawCdpControl). NativeAIControl is intentionally absent — and the driver enforces that by throwing when it is invoked.

The injectable client seam

All Steel I/O goes through ISteelClient, so this package builds and unit-tests with no network, no real SDK, and no API keys:

export interface ISteelClient {
    CreateSession(opts): Promise<{ SessionId: string; CdpEndpoint: string; SessionViewerUrl: string }>;
    ReleaseSession(sessionId: string): Promise<void>;
}

The default factory throws until you bind a real one — production must opt in explicitly:

import { SteelRemoteBrowser } from '@memberjunction/remote-browser-steel';

SteelRemoteBrowser.SetClientFactory((config) => new MySteelClientAdapter(config));

Production binding

Bind ISteelClient to the official steel-sdk:

• CreateSession → Steel.sessions.create(...) (session id + CDP websocketUrl + sessionViewerUrl).
• ReleaseSession → Steel.sessions.release(id).

Declare steel-sdk as an optional dependency wherever the production factory is bound — none of the SDK types leak into this package.

Install & build

npm install          # from the repo root
cd packages/AI/RemoteBrowser/Providers/Steel
npm run build
npm run test