Antigravity Next for DSH

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An unofficial model provider plugin for DeepSeek Harness (DSH). It connects locally installed Google Antigravity / Cloud Code Assist models directly to your DSH agent loop under provider id agy-next.

Disclaimer: Unofficial integration. Not affiliated with, endorsed by, or officially supported by Google or DeepSeek. Requires an authorized Google account and a local installation of the official Antigravity application.

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Highlights

• Zero Cloud Console Setup: Automatically resolves OAuth client pairs from your local official Antigravity installation. No need to create a project or credentials in Google Cloud Console.
• Multi-Account Pooling: Add multiple Google accounts. Set quota safety thresholds and automatically failover to standby accounts when quotas expire.
• Visual Quota Dashboard: Live visual telemetry for Gemini, Claude 3p, and Gemini 4 Argon weekly/5-hour quota buckets in the Settings panel.
• Thinking Level Control: Native mapping for Gemini 4 Argon reasoning efforts (Low, Medium, High).
• Private & Local: Client discovery is read-only. Tokens remain strictly inside your local <DSH_HOME>/storages/agy-next-oauth.json.

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Requirements

1. DeepSeek Harness: >=0.1.5-rc.1 <0.3.0 running on Node >=20.
2. Official Antigravity App: Installed locally on Windows (macOS/Linux detection in progress). Download from official portal. The app does not need to be running.
3. Google Account: With browser consent capability and access to Gemini / Cloud Code Assist models.

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Installation

Method 1: In DSH Web or Desktop (Recommended)

1. Open Plugins → + Add plugin in the DSH sidebar.
2. Enter the repository URL into the input field:

   https://github.com/kizaki-R/Antigravity-Next-for-DSH
   

   (Or enter agy-next once published to npm).
3. Select Install. DSH will automatically mount the plugin and register the settings interface.
4. Restart DSH.

Method 2: Local CLI / Developer Link

If developing from a local checkout:

# Register the local link in your DSH profile
dsh plugin --profile <profile> add link:/absolute/path/to/agy-next

Ensure agy-next is included in your profile's dsh.profile.bundles, then restart DSH.

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Getting Started

1. Verification & Login

Open Settings → AGY-Next in DSH:

1. Installation Status: Verify that DSH detects your local Antigravity installation path.
2. Sign In: Click Sign in / Add account. A browser window will open for standard Google OAuth consent.
3. Once authenticated, your account appears in the Account Pool with real-time quota indicators.

Headless / CLI alternative:

npm run login           # Add / sign in account
npm run login -- --status  # Check active status & quota
npm run login -- --force   # Force re-authentication
npm run login -- --logout  # Clear stored credentials

2. Custom Installation Path

If your Antigravity application is installed in a non-standard directory, specify it before launching DSH:

# PowerShell
$env:AGY_NEXT_INSTALL_PATH = 'C:\Custom\Path\To\Antigravity'

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Configuration

Add or edit the plugin section in your profile's cordis.yml if custom parameters are needed:

- id: agy-next
  name: agy-next
  config:
    credentialPath: ""               # Default: <DSH_HOME>/storages/agy-next-oauth.json
    streamIdleTimeoutMs: 300000      # 5 minutes idle stream protection
    discoveryTimeoutMs: 8000         # Local binary client detection timeout
    projectCacheTtlMs: 1800000       # Project metadata cache TTL (30 mins)
    runtimeModel: ""                 # Optional: pin a specific upstream model id

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Supported Models

Model Family	Key Variants	Features
Gemini 4 Argon	gemini-4-argon	Low / Medium / High reasoning effort, 5h & weekly quota tracking
Gemini Pro / Flash	gemini-2.5-pro, gemini-2.5-flash	Multimodal streaming, tool invocation
Claude (3p)	claude-3-7-sonnet, claude-3-5-sonnet	Integrated Cloud Code Assist Claude runtime

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Development & Test Suite

Run strict offline tests inside agy-next/:

npm run check        # Syntax checks across all 39 source modules
npm test             # Offline regression suite (21 fixture tests)
npm run test:peers   # Strict host peer contract test (0 skips tolerated)

For peer contract testing, export the DSH runtime dependencies:

$env:AGY_PEER_ROOT = 'C:\path\to\dsh\node_modules'
npm run test:peers

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Security & Storage Architecture

• No Secret Hardcoding: This repository contains no bundled Google OAuth Client IDs or Client Secrets. Everything is resolved dynamically at runtime from local binary resources.
• Isolated Storage: Credentials are saved to agy-next-oauth.json under your DSH home directory. The official Antigravity app's internal database is never modified or read.
• Tombstone Lifecycle: Logging out completely writes an empty book with a loggedOut: true tombstone to prevent phantom auto-imports from legacy configs.

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License

MIT © Kizaki