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Add AlgoVoi LangGraph payment-gate adapter#35

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chopmob-cloud wants to merge 2 commits intovon-development:mainfrom
chopmob-cloud:add-algovoi-langgraph-adapter
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Add AlgoVoi LangGraph payment-gate adapter#35
chopmob-cloud wants to merge 2 commits intovon-development:mainfrom
chopmob-cloud:add-algovoi-langgraph-adapter

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Summary

Adds AlgoVoi LangGraph Adapter to the 🛠️ Developer Tools section.

What it does: Payment-gates any compiled LangGraph StateGraph behind on-chain USDC payment verification using x402, MPP (IETF draft), or AP2. Supports all 4 chains — Algorand, VOI, Hedera, and Stellar.

LangGraph integration surfaces:

  • gate.invoke_graph(compiled_graph, inputs) — gates graph.invoke()
  • gate.stream_graph(compiled_graph, inputs, stream_mode=...) — gates graph.stream()
  • AlgoVoiPaymentToolBaseTool subclass, compatible with ToolNode([tool]) and create_react_agent(llm, [tool])
  • gate.flask_guard() / gate.flask_agent(graph) — Flask convenience wrappers

Quality: 77/77 unit tests (all mocked), Phase 1 smoke test 12/12 PASS (Comet-validated 16 Apr 2026). Open-source under BSL 1.1.

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