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

# Design

> This section explains the design of major Knowledge Stack subsystems. These documents help you understand how key features work and how to get the most out of them.

* **[Billing and Quotas](/design/billing-quotas)** -- How tenant-level resource limits, usage tracking, and subscription billing work.

* **[Workflows](/design/workflows)** -- The ABCD workflow system for building ETL processes that extract, process, and output content using AI agents.

* **[Prompt Management](/design/prompt-management)** -- How LLM prompts are managed and customized, including multi-language support.

* **[Agent Architecture](/design/nanobot-fleet)** -- How the multi-agent system works: stateless AI agents that search your knowledge base and stream responses in real time.

* **[Design Decisions](/design/design-decisions)** -- Key architectural choices and how they affect your experience.