A
licenseNot graded
qualityA
maintenanceEnables AI agents to delegate tasks, run adversarial reviews, and manage background jobs across multiple models and providers via anymodel_* tools.
Apache 2.0
SubagentBridge
by rzqllh
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@SubagentBridgeSpawn a background subagent to refactor the auth module and report back."
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
SubagentBridge
An MCP server that lets a primary agent inside Antigravity IDE delegate coding tasks to background subagents across multiple model backends — with automatic crash recovery, guaranteed process cleanup, and a real Human-in-the-Loop approval gate for destructive actions.
Architecturally inspired by antigravity-mcp
by Inferno-Aditya (MIT License). No code from that project is reused directly —
see THIRD_PARTY_NOTICES.md for full attribution.
Why
A review of antigravity-mcp's source found it didn't fully deliver on its own
docs: timed-out subagents were left running, failed runs weren't retried, a
workspace-boundary check could silently fall through, and the advertised
"Human-in-the-Loop" safety gate didn't actually exist in code. SubagentBridge
fixes all four and adds first-class support for GPT-5.6 (Sol/Luna) and
DeepSeek V4 Flash as additional runners. Full rationale in docs/PRD.md.
Related MCP server: pi-delegate-mcp
Status
🚧 Planning stage — see docs/ for PRD, architecture, weakness tracker, API
reference, runner spec, security notes, and test plan. Implementation not yet
started.
Planned Tools
Tool | Purpose |
| Start a new background subagent session |
| Send a follow-up instruction to a session |
| Block until a session finishes or times out (kills the process on timeout) |
| Inspect running/finished sessions |
| Token/cost accounting per session |
| Direct surgical find-replace patch, workspace-bounded |
| Force-stop a session |
| Resolve a pending HITL approval request |
See docs/API_REFERENCE.md for full signatures.
Supported Runners
agy— Antigravity IDE's own agentclaude— Claude Codegpt_sol— GPT-5.6 Sol/Luna (planned)deepseek— DeepSeek V4 Flash (planned)
Setup (planned)
pip install -r requirements.txtAdd to Antigravity's mcp_config.json — see mcp_config.example.json.
License
MIT — see LICENSE. Third-party attribution in THIRD_PARTY_NOTICES.md.
This server cannot be deployed
Maintenance
ActivityMaintained
ResponsivenessNo issues
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