fix: chat uipath agent sample (#403)

Author: cristipufu

samples/chat-uipath-agent/.agent/CLI_REFERENCE.md

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+## Required Agent Structure
+
+**IMPORTANT**: All UiPath coded agents MUST follow this standard structure unless explicitly specified otherwise by the user.
+
+### Required Components
+
+Every agent implementation MUST include these three Pydantic models:
+
+```python
+from pydantic import BaseModel
+
+class Input(BaseModel):
+    """Define input fields that the agent accepts"""
+    # Add your input fields here
+    pass
+
+class State(BaseModel):
+    """Define the agent's internal state that flows between nodes"""
+    # Add your state fields here
+    pass
+
+class Output(BaseModel):
+    """Define output fields that the agent returns"""
+    # Add your output fields here
+    pass
+```
+
+### Required LLM Initialization
+
+Unless the user explicitly requests a different LLM provider, always use `UiPathChat`:
+
+```python
+from uipath_langchain.chat import UiPathChat
+
+llm = UiPathChat(model="gpt-4o-2024-08-06", temperature=0.7)
+```
+
+**Alternative LLMs** (only use if explicitly requested):
+- `ChatOpenAI` from `langchain_openai`
+- `ChatAnthropic` from `langchain_anthropic`
+- Other LangChain-compatible LLMs
+
+### Standard Agent Template
+
+Every agent should follow this basic structure:
+
+```python
+from langchain_core.messages import SystemMessage, HumanMessage
+from langgraph.graph import START, StateGraph, END
+from uipath_langchain.chat import UiPathChat
+from pydantic import BaseModel
+
+# 1. Define Input, State, and Output models
+class Input(BaseModel):
+    field: str
+
+class State(BaseModel):
+    field: str
+    result: str = ""
+
+class Output(BaseModel):
+    result: str
+
+# 2. Initialize UiPathChat LLM
+llm = UiPathChat(model="gpt-4o-2024-08-06", temperature=0.7)
+
+# 3. Define agent nodes (async functions)
+async def process_node(state: State) -> State:
+    response = await llm.ainvoke([HumanMessage(state.field)])
+    return State(field=state.field, result=response.content)
+
+async def output_node(state: State) -> Output:
+    return Output(result=state.result)
+
+# 4. Build the graph
+builder = StateGraph(State, input=Input, output=Output)
+builder.add_node("process", process_node)
+builder.add_node("output", output_node)
+builder.add_edge(START, "process")
+builder.add_edge("process", "output")
+builder.add_edge("output", END)
+
+# 5. Compile the graph
+graph = builder.compile()
+```
+
+**Key Rules**:
+1. Always use async/await for all node functions
+2. All nodes (except output) must accept and return `State`
+3. The final output node must return `Output`
+4. Use `StateGraph(State, input=Input, output=Output)` for initialization
+5. Always compile with `graph = builder.compile()`

samples/chat-uipath-agent/.agent/REQUIRED_STRUCTURE.md

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+UIPATH_URL=https://alpha.uipath.com/<organization>/<tenant>
+UIPATH_ACCESS_TOKEN=YOUR TOKEN HERE

samples/chat-uipath-agent/.agent/SDK_REFERENCE.md

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+{
+    "python-envs.pythonProjects": []
+}

samples/chat-uipath-agent/.env.example

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+# Agent Code Patterns Reference
+
+This document provides practical code patterns for building UiPath coded agents using LangGraph and the UiPath Python SDK.
+
+---
+
+## Documentation Structure
+
+This documentation is split into multiple files for efficient context loading. Load only the files you need:
+
+1. **@.agent/REQUIRED_STRUCTURE.md** - Agent structure patterns and templates
+   - **When to load:** Creating a new agent or understanding required patterns
+   - **Contains:** Required Pydantic models (Input, State, Output), LLM initialization patterns, standard agent template
+
+2. **@.agent/SDK_REFERENCE.md** - Complete SDK API reference
+   - **When to load:** Calling UiPath SDK methods, working with services (actions, assets, jobs, etc.)
+   - **Contains:** All SDK services and methods with full signatures and type annotations
+
+3. **@.agent/CLI_REFERENCE.md** - CLI commands documentation
+   - **When to load:** Working with `uipath init`, `uipath run`, or `uipath eval` commands
+   - **Contains:** Command syntax, options, usage examples, and workflows

samples/chat-uipath-agent/.vscode/settings.json

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+@AGENTS.md

samples/chat-uipath-agent/AGENTS.md

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+# Movie Chat Agent
+
+An AI assistant using LangGraph's built-in react agent with UiPath LLM and DuckDuckGo search for movie research and recommendations.
+
+## Requirements
+
+- Python 3.11+
+
+## Installation
+
+```bash
+uv venv -p 3.11 .venv
+source .venv/bin/activate  # On Windows: .venv\Scripts\activate
+uv sync
+```
+
+## Usage
+
+```bash
+uipath run agent '{"messages": [{"type": "human", "content": "Tell me about the movie Inception"}]}'
+```

samples/chat-uipath-agent/CLAUDE.md

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+flowchart TB
+  __start__(__start__)
+  model(model)
+  tools(tools)
+  __end__(__end__)
+  __start__ --> model
+  model --> __end__
+  model --> tools
+  tools --> model

samples/chat-uipath-agent/README.md

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+{
+    "version": "2.0",
+    "resources": []
+}