# TypeAgent Shell

## Overview

TypeAgent Shell is an UI entry point to **TypeAgent sample code** that explores architectures for building _interactive agents_ with _natural language interfaces_ using structured prompting and LLM.

TypeAgent Shell is a **personal agent** that takes user request and use an extensible set of agents to perform actions, answer questions, and carry a conversation. [TypeAgent CLI](../cli/)'s interactive mode is a command line version of the app, and both shared the core [dispatcher](../dispatcher/) component. Please read dispatcher's [README.md](../dispatcher/README.md) on example requests and usage.

## Prerequisites

### Linux/WSL Build Prerequisites

TypeAgent shell is built using [Electron](https://www.electronjs.org). Follow these [instructions](https://www.electronjs.org/docs/latest/development/build-instructions-linux) to install the libraries needed to build and use in the Linux/WSL environment.

## Running the agent shell

```shell
pnpm run shell
```

On Windows, if you notice a lag when starting up the shell, you can add the source code folder to the exclusions list for Windows Defender by following [these instructions](https://support.microsoft.com/en-us/windows/add-an-exclusion-to-windows-security-811816c0-4dfd-af4a-47e4-c301afe13b26).

Additionally, if you are running MS Graph based sample agents like Calendar and Email, there is an auth token persisted in the identity cache that can occasionally get corrupted. This could also slow down the start up time of the shell, you can delete that by running:

```console
del %LOCALAPPDATA%\.IdentityService\typeagent-tokencache
```

## Conversation Management

When connected to the agent server (remote mode), TypeAgent Shell supports full multi-conversation management. Conversations persist across sessions and can be created, renamed, switched, and deleted from the UI.

### Default conversation

When the Shell connects to the agent server, it automatically joins a conversation named `"Shell"`, creating it if it does not already exist. This conversation persists across restarts — history is replayed on reconnect, with past messages shown in grayscale and a `─── now ───` separator marking where new activity begins.

### Conversation commands

Use `/conversation` (or the `@conversation` alias) to manage conversations from the chat input:

| Command                            | Description               |
| ---------------------------------- | ------------------------- |
| `/conversation list`               | List all conversations    |
| `/conversation new [name]`         | Create a new conversation |
| `/conversation switch <id\|name>`  | Switch to a conversation  |
| `/conversation rename <id> <name>` | Rename a conversation     |
| `/conversation delete <id\|name>`  | Delete a conversation     |

### Switching conversations

When you switch to a different conversation:

- The chat area clears and replays that conversation's history, shown in grayscale to distinguish it from new activity.
- A `─── now ───` separator marks where new messages will appear.
- A status message confirms which conversation you have joined: `Connected to conversation 'X'.`

### Multi-client notifications

If you have multiple clients connected (e.g., both a Shell and a CLI connected to the same conversation), you will see status messages when clients join or leave:

```
[A new client has joined this conversation. You are connected to 'my-chat'.]
[A client has left this conversation. You remain connected to 'my-chat'.]
```

### Local mode

In local mode (no agent server), only a single default conversation is available. Conversation switching and creation are not supported.

In local mode, the shell also hosts an in-process port-discovery WebSocket on `ws://localhost:8999/` (the same default the standalone `agentServer` uses) so external clients like the Chrome extension can find in-process agents — e.g. the browser agent's dynamically assigned WebSocket port — through the same discovery channel they would use against a real `agentServer`. If port 8999 is already in use (a real `agentServer` running, another local-mode shell, etc.) the bind fails loudly and the shell continues without discovery; external clients won't be able to find in-process agents until you restart the shell with no conflict.

### Azure Speech to Text service (Optional)

Currently, TypeAgent Shell optionally supports voice input via Azure Speech Services or [Local Whisper Service](../../../python/stt/whisperService/) in addition to keyboard input.

To set up Azure [Speech to Text service](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/index-speech-to-text), the following variables in `config.local.yaml` (under `speech`) or the legacy `.env` are needed:

| Variable              | Value                                                                            |
| --------------------- | -------------------------------------------------------------------------------- |
| `SPEECH_SDK_ENDPOINT` | Service URL (or speech API resource ID when using Identity based authentication) |
| `SPEECH_SDK_KEY`      | API key                                                                          |
| `SPEECH_SDK_REGION`   | Region of the service (e.g. `westus2`)                                           |

## Keyless API Access

If you would like to enable keyless Speech API access you must have performed the following steps:

1. Specify `identity` as the `SPEECH_SDK_KEY` in `config.local.yaml` (set `speech.key: identity`) or the legacy `.env` file.
2. Replace the `SPEECH_SDK_ENDPOINT` value with the azure resource id of your cognitive service instance (i.e. `/subscriptions/<your subscription guid>/resourceGroups/myResourceGroup/providers/Microsoft.CognitiveServices/accounts/speechapi`).
3. Configure your speech API to support Azure Entra RBAC and add the necessary users/groups with the necessary permissions
   (typically `Cognitive Services Speech User` or `Cognitive Services Speech Contributor`). More information on cognitive services roles [here](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/role-based-access-control).
4. If you are using JIT access elevate prior to calling the speech API. Please refer to the [elevate.js](../../tools/scripts/elevate.js) script for doing this efficiently.

## Trademarks

This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft
trademarks or logos is subject to and must follow
[Microsoft's Trademark & Brand Guidelines](https://www.microsoft.com/en-us/legal/intellectualproperty/trademarks/usage/general).
Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship.
Any use of third-party trademarks or logos are subject to those third-party's policies.
