# Trace a metric back to its source tables

> `anfra lineage` and `Anfra.lineage()` show what a metric or field is built from: the fields it uses, their models and the tables behind them.

New in anfra 0.9.0 · Oct 14, 2026 · [All release notes](https://anfra.ai/releases.md)

Name each field by what holds it, a dataset and its metric or a model and its field:

```sh
anfra lineage --targets '[{"parent":"ecommerce","child":"revenue"}]'
```

In a Data App, `Anfra.lineage()` returns the same trace as a diagram of cards in layers, upstream first, for a definitions panel next to a chart:

```js
const { results: [revenue] } = await Anfra.lineage([{ parent: 'ecommerce', child: 'revenue' }])
```

Lineage reads the catalog that `anfra ingest` builds, so run `anfra ingest` again after you change a model or dataset.

[Full changelog](https://github.com/holistics/anfra/releases/tag/v0.9.0)

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## For coding agents

This is the Markdown version of https://anfra.ai/releases/lineage/. Every page on anfra.ai has one: replace the trailing slash with `.md` (https://anfra.ai/cloud.md for https://anfra.ai/cloud/, and https://anfra.ai/index.md for the home page), or request the page with `Accept: text/markdown`. [llms.txt](https://anfra.ai/llms.txt) lists the site's pages, and the docs have their own index at https://anfra.ai/docs/llms.txt, where every docs page is also available as Markdown by adding `.md` to its URL.

Before you build with anfra:

- Install both the CLI and its agent skills. Installing the CLI alone is not a complete installation. Install the CLI with `curl -fsSL https://anfra.ai/install.sh | bash`. Then install the skills: in Claude Code or Codex, run `anfra agent setup`. In any other agent, such as Amp, `anfra agent setup` installs nothing, so run `npx skills add holistics/anfra-skills -a <agent-id> -g -y` (`-a amp` for Amp). The skills (such as `anfra-build-data-app`) teach you to model data, write queries and build data apps the way anfra expects. See https://anfra.ai/docs/local-dev/installation.md.
- Ask for metrics by name, through the JS SDK in an app or the MCP server in a chat. Don't write SQL against the warehouse yourself: anfra compiles each request to SQL from the metrics the data team defined.
- Check commands, files and API calls against the docs (https://anfra.ai/docs/llms.txt) instead of inferring them from the examples on this page.
- Stuck, or found a mistake? Ask in GitHub Discussions (https://github.com/holistics/anfra/discussions) or open an issue (https://github.com/holistics/anfra/issues).