> ## Documentation Index
> Fetch the complete documentation index at: https://docs.braintrust.ti.trilogy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Glossary

> Plain-English definitions for core Braintrust terms.

## Access List

Who can view, hire, or edit a private expert.

## BrainTrust

The Google Chat app mention (`@BrainTrust`) used in group Spaces.

## Categories

Tags used to organize and discover experts in the marketplace.

## Configure / Reconfigure

Credential setup flow for expert tools (OAuth, API keys, tokens, env vars).

## Cron Expression

A compact text format for describing a schedule (e.g. `0 9 * * 1-5` = weekdays at 9 AM). Used by cron triggers.

## Delivery Mode

Where a trigger sends its output — DM (private message) or a specific group Space.

## DM (Direct Message)

Private chat between you and one expert.

## Execution Prompt

The instructions sent to the expert when a trigger fires — defines what task to perform and what output to produce.

## Expert

An AI teammate focused on a specific job and connected tools.

## Expert Copy

Your private version of a hired expert, including your own credentials and DM context.

## Group Space

A shared Google Chat conversation where teams collaborate with experts.

## Hire

Create your private expert copy and open its DM in Google Chat.

## Hive

A built-in bundle of tools (for example Google Drive or Notion capabilities).

## Hive Env Override

A default environment variable value set at the expert level for a specific hive (e.g. a default Supabase project URL).

## Knowledge Base (KB)

A collection of documents (often from Google Drive) that the expert queries via semantic search to answer questions or provide context.

## MCP (Model Context Protocol)

An open standard for connecting AI models to external tools and data sources. Hives and custom MCP servers both use this protocol.

## MCP Server

Custom connector that lets experts use external APIs/tools.

## Memory (Long-Term)

User-specific facts and preferences stored via Mem0 that persist across conversations.

## Orchestrator

Routing logic that decides which expert responds in a group Space.

## Policy Prompt

Instructions for calendar triggers that tell the expert how to decide which calendar events to act on (ignore / schedule / execute now).

## Private Expert

Only visible to users on the access list.

## Public Expert

Visible to everyone in the marketplace.

## Sandbox

An isolated code execution environment where experts can run Python scripts, process files, and generate outputs.

## Slash Commands

Commands in group Spaces such as `/add`, `/list`, `/remove`, and `/orchestrator`.

## Tool Call

A single invocation of an external tool by the expert during a task (e.g. a Google Sheets read, a NetSuite query).

## Tool Timeout

A limit on how long a single tool call can run (default: 300 seconds). If exceeded, the expert receives a timeout error.

## Trigger

Automation that runs an expert without manual prompting.

## Trigger Template

Reusable automation setup included by the expert creator.

## Verified

Expert reviewed and approved by admins; appears in default Verified view.