feat(python): add zeroclaw-tools companion package for LangGraph tool calling

- Add Python package with LangGraph-based agent for consistent tool calling
- Provides reliable tool execution for providers with inconsistent native support
- Includes tools: shell, file_read, file_write, web_search, http_request, memory
- Discord bot integration included
- CLI tool for quick interactions
- Works with any OpenAI-compatible provider (Z.AI, OpenRouter, Groq, etc.)

Why: Some LLM providers (e.g., GLM-5/Zhipu) have inconsistent tool calling behavior.
LangGraph's structured approach guarantees reliable tool execution across all providers.

python/README.md

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+# zeroclaw-tools
+
+Python companion package for [ZeroClaw](https://github.com/zeroclaw-labs/zeroclaw) — LangGraph-based tool calling for consistent LLM agent execution.
+
+## Why This Package?
+
+Some LLM providers (particularly GLM-5/Zhipu and similar models) have inconsistent tool calling behavior when using text-based tool invocation. This package provides a LangGraph-based approach that delivers:
+
+- **Consistent tool calling** across all OpenAI-compatible providers
+- **Automatic tool loop** — keeps calling tools until the task is complete
+- **Easy extensibility** — add new tools with a simple `@tool` decorator
+- **Framework agnostic** — works with any OpenAI-compatible API
+
+## Installation
+
+```bash
+pip install zeroclaw-tools
+```
+
+With Discord integration:
+
+```bash
+pip install zeroclaw-tools[discord]
+```
+
+## Quick Start
+
+### Basic Agent
+
+```python
+import asyncio
+from zeroclaw_tools import create_agent, shell, file_read, file_write
+from langchain_core.messages import HumanMessage
+
+async def main():
+    # Create agent with tools
+    agent = create_agent(
+        tools=[shell, file_read, file_write],
+        model="glm-5",
+        api_key="your-api-key",
+        base_url="https://api.z.ai/api/coding/paas/v4"
+    )
+    
+    # Execute a task
+    result = await agent.ainvoke({
+        "messages": [HumanMessage(content="List files in /tmp directory")]
+    })
+    
+    print(result["messages"][-1].content)
+
+asyncio.run(main())
+```
+
+### CLI Usage
+
+```bash
+# Set environment variables
+export API_KEY="your-api-key"
+export API_BASE="https://api.z.ai/api/coding/paas/v4"
+
+# Run the CLI
+zeroclaw-tools "List files in the current directory"
+```
+
+### Discord Bot
+
+```python
+import os
+from zeroclaw_tools.integrations import DiscordBot
+
+bot = DiscordBot(
+    token=os.environ["DISCORD_TOKEN"],
+    guild_id=123456789,
+    allowed_users=["123456789"]
+)
+
+bot.run()
+```
+
+## Available Tools
+
+| Tool | Description |
+|------|-------------|
+| `shell` | Execute shell commands |
+| `file_read` | Read file contents |
+| `file_write` | Write content to files |
+| `web_search` | Search the web (requires Brave API key) |
+| `http_request` | Make HTTP requests |
+| `memory_store` | Store data in memory |
+| `memory_recall` | Recall stored data |
+
+## Creating Custom Tools
+
+```python
+from zeroclaw_tools import tool
+
+@tool
+def my_custom_tool(query: str) -> str:
+    """Description of what this tool does."""
+    # Your implementation here
+    return f"Result for: {query}"
+
+# Use with agent
+agent = create_agent(tools=[my_custom_tool])
+```
+
+## Provider Compatibility
+
+Works with any OpenAI-compatible provider:
+
+- **Z.AI / GLM-5** — `https://api.z.ai/api/coding/paas/v4`
+- **OpenRouter** — `https://openrouter.ai/api/v1`
+- **Groq** — `https://api.groq.com/openai/v1`
+- **DeepSeek** — `https://api.deepseek.com`
+- **Ollama** — `http://localhost:11434/v1`
+- **And many more...**
+
+## Architecture
+
+```
+┌─────────────────────────────────────────────┐
+│              Your Application               │
+├─────────────────────────────────────────────┤
+│           zeroclaw-tools Agent              │
+│  ┌─────────────────────────────────────┐   │
+│  │         LangGraph StateGraph         │   │
+│  │    ┌───────────┐    ┌──────────┐    │   │
+│  │    │   Agent   │───▶│   Tools  │    │   │
+│  │    │   Node    │◀───│   Node   │    │   │
+│  │    └───────────┘    └──────────┘    │   │
+│  └─────────────────────────────────────┘   │
+├─────────────────────────────────────────────┤
+│        OpenAI-Compatible LLM Provider       │
+└─────────────────────────────────────────────┘
+```
+
+## Comparison with Rust ZeroClaw
+
+| Feature | Rust ZeroClaw | zeroclaw-tools |
+|---------|---------------|----------------|
+| **Binary size** | ~3.4 MB | Python package |
+| **Memory** | <5 MB | ~50 MB |
+| **Startup** | <10ms | ~500ms |
+| **Tool consistency** | Model-dependent | LangGraph guarantees |
+| **Extensibility** | Rust traits | Python decorators |
+
+Use **Rust ZeroClaw** for production edge deployments. Use **zeroclaw-tools** when you need guaranteed tool calling consistency or Python ecosystem integration.
+
+## License
+
+MIT License — see [LICENSE](../LICENSE)