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

# Introduction

> dex is the agent-native analytics engineering toolkit. Explore a warehouse, transform it with reviewable dbt edits, and maintain it as schemas and data drift.

dex lets a coding agent work on your warehouse and your dbt project without the
risks that usually come with it. It explores an unfamiliar warehouse, authors dbt
models and semantic layers as reviewable diffs, and keeps the project correct as
the data underneath it changes.

Every rule that makes this safe lives in the engine, not in a prompt. dex never
writes to your data, never pulls personal data into the agent's context, never
spends on a metered warehouse before quoting the cost, never changes your project
except as a diff you review, and never builds anywhere but a dev target. The
[cost controls](/dex/guardrails/cost-controls) and the [PII policy](/dex/guardrails/pii-policy)
describe two of those rules in full.

## Explore, Transform, Maintain

* **Explore** ranks what matters in a warehouse, profiles it from aggregates, flags
  personal data, and infers how tables join. See the
  [exploration methodology](/dex/concepts/methodology).
* **Transform** writes and refactors dbt models, tests, and semantic layers as
  plans you review before anything is applied. See
  [what dex reads and writes in a dbt project](/dex/concepts/dbt-project).
* **Maintain** compares the warehouse and the project against a known-good
  snapshot and proposes the edits that reconcile any drift.

## Where to go next

* The [CLI reference](/dex/cli/overview) lists every command and flag.
* The connector pages, starting with [DuckDB](/dex/connectors/duckdb), cover
  credentials, cost, and read-only enforcement for each warehouse.
* The [Apache Ossie tutorial](/dex/guides/ossie-semantic-layer) walks a native
  semantic layer through every command on a local warehouse.


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