# Flow — Reproducible workflow engine

> Run the same assessment twice. Get the same answer twice.

Flow executes structured, ontology-driven workflow files. Agentic AI fills out each template against your substances. Every run keeps a full audit trail with versioned provenance, so an assessment reproduces exactly, months later, by anyone.

## Key facts
- **Versioned** — provenance on every step
- **Dozens** — of workflows, plus custom builds
- **1:1** — reproducible: same inputs, same result

## What Flow does

### Reproducible by design
A workflow file plus its inputs always produces the same output. Re-run it next quarter and the result matches.

### Full audit trail
Each step records what ran, on what data, and why — the paper trail a regulatory submission needs.

### Ontology-driven templates
Workflows are structured against the ToxIndex ontology, so steps map cleanly to endpoints and study types.

### Built around your process
Beyond the library of ready workflows, we hand-build templates that mirror how your team already assesses chemicals.

## How it works
1. **Pick or commission a workflow** — Start from a ready template — risk assessment, chemical health assessment, ICH M7 — or one built to your process.
2. **Point it at your substances** — Agentic AI fills each step against your chemicals, pulling from the data and prediction layers.
3. **Ship a reproducible result** — Every run is versioned and auditable, so the assessment stands up to review and repeats on demand.

## Works closely with
- [Sage](https://toxindex.com/platform/sage.md): Conversational answer engine
- [Gaps](https://toxindex.com/platform/gaps.md): Automated data-gap analysis
- [ToxJobs](https://toxindex.com/platform/toxjobs.md): Prediction toolkit

## Frequently asked questions

**What does Flow do?**

Flow runs chemical assessments as ontology-driven workflow files. Agentic AI fills each step against your substances, and every run keeps a versioned audit trail so the assessment reproduces exactly.

**How is Flow reproducible?**

A workflow file plus its inputs always produces the same output. Flow records the data snapshot, model versions, and execution sequence, so rerunning it next quarter returns an identical result.

**Can Flow match our existing assessment process?**

Beyond the ready library, we hand-build workflow templates that mirror how your team already assesses chemicals, from REACH risk assessment to ICH M7.

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Canonical page: https://toxindex.com/platform/flow