# How to Add a New Channel to Agent Reach: A Complete Implementation Guide

> Easily add a new channel to Agent Reach. Follow our guide to implement new channels by creating Python classes, defining methods, and registering your instance.

- Repository: [Pnant/Agent-Reach](https://github.com/Panniantong/Agent-Reach)
- Tags: how-to-guide
- Published: 2026-07-02

---

**To add a new channel to Agent Reach, create a Python class inheriting from `Channel` in [`agent_reach/channels/base.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/base.py), implement the `can_handle()` and `check()` methods, and register an instance in the `ALL_CHANNELS` list inside [`agent_reach/channels/__init__.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/__init__.py).**

Agent Reach is an extensible Python framework that treats every supported platform as a channel. Adding a new channel to Agent Reach requires implementing a concrete class that satisfies the contract defined by the abstract `Channel` base class and registering it in the global channel registry. This guide walks through the exact implementation steps using the actual source code structure from the Panniantong/Agent-Reach repository.

## Understanding the Channel Architecture

Every channel in Agent Reach inherits from the abstract base class `Channel` defined in [`agent_reach/channels/base.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/base.py). This base class establishes a strict contract that every concrete implementation must satisfy to integrate with the framework's health-checking and routing systems.

The two required methods define platform detection and backend validation:

- **`can_handle(url: str) -> bool`** – Determines if a given URL belongs to this channel's platform by parsing the netloc or path patterns.
- **`check(config=None) -> Tuple[str, str]`** – Probes required external executables, sets `self.active_backend`, and returns a status tuple. The first element must be one of `ok`, `warn`, `off`, or `error`, while the second provides a human-readable message.

For probing external tools, implementations should use `probe_command()` from [`agent_reach/probe.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/probe.py), which handles executable discovery and version checking consistently across platforms.

## Step-by-Step Implementation Guide

### Step 1: Create the Channel Implementation File

Create a new Python file under `agent_reach/channels/` with your channel name. Import the `Channel` base class and define your concrete implementation with appropriate metadata attributes:

```python

# agent_reach/channels/example.py

from .base import Channel

class ExampleChannel(Channel):
    name = "example"
    description = "Example platform description"
    backends = ["example-cli"]
    tier = 0

```

### Step 2: Implement the Required Methods

Implement `can_handle()` to identify URLs belonging to your platform using `urlparse`, and implement `check()` to validate the backend tool is installed and functional:

```python
    def can_handle(self, url: str) -> bool:
        from urllib.parse import urlparse
        return "example.com" in urlparse(url).netloc

    def check(self, config=None):
        from agent_reach.probe import probe_command
        probe = probe_command("example-cli", ["--version"], package="example-cli")
        
        if probe.status == "missing":
            self.active_backend = None
            return "off", "example-cli not installed. Install with `pip install example-cli`"
        
        if not probe.ok:
            self.active_backend = None
            return "error", f"example-cli cannot run: {probe.hint or probe.output}"
        
        self.active_backend = "example-cli"
        return "ok", "example-cli is ready"

```

Optional attributes like `usage` can be added to provide CLI invocation hints that appear in the doctor output, following the pattern seen in [`agent_reach/channels/instagram.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/instagram.py).

### Step 3: Register the Channel in the Registry

Edit [`agent_reach/channels/__init__.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/__init__.py) to import your new class and append an instance to the `ALL_CHANNELS` list:

```python
from .example import ExampleChannel

ALL_CHANNELS: List[Channel] = [
    # ... existing channels ...

    ExampleChannel(),
]

```

The registry automatically discovers all channels in this list during the health-check routine.

## Complete Working Example

Here is a full, minimal implementation for a hypothetical platform saved as [`agent_reach/channels/example.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/example.py):

```python

# -*- coding: utf-8 -*-

"""Example – a minimal channel implementation."""
from .base import Channel

class ExampleChannel(Channel):
    name = "example"
    description = "Demo platform supporting video extraction"
    backends = ["example-cli"]
    tier = 0

    def can_handle(self, url: str) -> bool:
        from urllib.parse import urlparse
        return "example.com" in urlparse(url).netloc

    def check(self, config=None):
        from agent_reach.probe import probe_command
        probe = probe_command("example-cli", ["--version"], package="example-cli")
        
        if probe.status == "missing":
            self.active_backend = None
            return "off", "example-cli missing – install via pip."
        
        if not probe.ok:
            self.active_backend = None
            return "error", f"example-cli broken: {probe.hint or probe.output}"
        
        self.active_backend = "example-cli"
        return "ok", "example-cli ready"

```

## Verify Your Implementation

After saving your channel file and updating the registry, run the doctor command to verify the integration:

```bash
python -m agent_reach.cli doctor

```

You should see output similar to:

```

example – ok – example-cli ready

```

If the status shows `off` or `error`, the message will indicate whether the executable is missing or malfunctioning, allowing you to debug the `check()` implementation.

## Summary

- **Inherit from `Channel`** – All channels must subclass the abstract base class in [`agent_reach/channels/base.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/base.py) and implement the required interface.
- **Implement `can_handle()`** – This method enables URL routing by returning `True` when the URL belongs to your platform.
- **Implement `check()`** – Use `probe_command()` from [`agent_reach/probe.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/probe.py) to validate external tools and return status tuples (`ok`, `warn`, `off`, `error`).
- **Register in `ALL_CHANNELS`** – Import and instantiate your class in [`agent_reach/channels/__init__.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/__init__.py) to make it discoverable.
- **Verify with doctor** – Run `python -m agent_reach.cli doctor` to confirm the channel is active and the backend is properly detected.

## Frequently Asked Questions

### What methods must I implement when adding a new channel to Agent Reach?

You must implement **`can_handle(url: str)`** and **`check(config=None)`**. The `can_handle` method enables the router to identify platform-specific URLs, while `check` validates that required backend executables are installed and functional, setting `self.active_backend` when successful.

### How does Agent Reach detect if a backend tool is installed?

Agent Reach uses the **`probe_command()`** function from [`agent_reach/probe.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/probe.py) to check for executable availability. This utility runs version checks and returns a status object indicating whether the tool is missing, broken, or ready, allowing your `check()` method to return appropriate status messages.

### Can I add optional functionality like transcribe methods to my channel?

Yes, you can extend your channel class with additional methods such as **`transcribe()`** for platforms that support audio processing. While `can_handle` and `check` are required for registration, optional methods enable platform-specific features that agents can invoke when the backend supports them.

### Where does Agent Reach look for channel registrations?

Agent Reach discovers channels through the **`ALL_CHANNELS`** list defined in [`agent_reach/channels/__init__.py`](https://github.com/Panniantong/Agent-Reach/blob/main/agent_reach/channels/__init__.py). The health-check routine iterates over this list to run diagnostics, so your new channel must be imported and instantiated there to be recognized by the system.