Reverts ArcadeAI/arcade-mcp#759
<!-- CURSOR_SUMMARY -->
---
> [!NOTE]
> **Medium Risk**
> Adds a new LangChain/LangGraph integration layer that wraps and
executes Arcade tools, including authorization and error/interrupt
handling; bugs here could impact tool execution semantics for adopters.
Changes are mostly additive and scoped to `contrib/langchain`.
>
> **Overview**
> Re-introduces a standalone `contrib/langchain` Python package
(`langchain-arcade`) to expose Arcade tools as LangChain
`StructuredTool`s.
>
> Adds sync/async `ToolManager` implementations plus utilities to
generate Pydantic arg schemas from `ToolDefinition`, optionally rewrite
tool names (underscores vs dots), and handle authorization via LangGraph
`NodeInterrupt` or structured error responses.
>
> Includes packaging/dev scaffolding (`pyproject.toml`, `tox.ini`,
`Makefile`, `.gitignore`, `LICENSE`, `README`) and a comprehensive test
suite covering manager behaviors and auth flows.
>
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
abd23b6d954470cb1e7376158468c0e59cdc7d7a. This will update automatically
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<!-- /CURSOR_SUMMARY -->
**PR Description**
This update bumps the integration’s version to `0.2.0` and brings
several important changes to how `langchain-arcade` interfaces with
Arcade tools:
1. **Updated Tool Definition Imports**
• Replaces `arcadepy.types.shared.ToolDefinition` with
`arcadepy.types.ToolGetResponse as ToolDefinition`.
• The parameter extraction is now done via `tool_def.input.parameters`
instead of the previous `tool_def.inputs.parameters`.
2. **Authorization Flow Adjustments**
• Uses `auth_response.url` instead of `auth_response.authorization_url`.
• The `authorize` and `is_authorized` methods now rely on the Arcade
client’s updated arguments (`client.auth.status(id=authorization_id)`).
3. **Tool Execution Parameter Renaming**
• The `execute` method now expects `input=kwargs` instead of
`inputs=kwargs`, aligning with Arcade’s new API spec.
4. **Tool Retrieval Enhancements**
• `_retrieve_tool_definitions` is revised to better handle pagination
and tool listing (including when no tools/toolkits are explicitly
provided).
5. **Version & Dependency Updates**
• Increases `langchain-arcade` to `0.2.0`.
• Switches `arcadepy` dependency to `~1.0.0rc1`.
• Updates example requirements to consume
`langchain-arcade[langgraph]>=0.2.0`.
These changes may affect existing code that relies on older parameter
names (`inputs.parameters` → `input.parameters`) and the renamed execute
argument. Please ensure any integrations or custom usage of Arcade tools
is updated accordingly.
