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

# Neuro-Features and state machines

> Learn how contracts create digital features with lifecycle state, ownership, and history

A **Neuro-Feature** is a contract-related digital feature that an application can retrieve together with its attributes and event history. A related **state machine** can make allowed lifecycle states and transitions explicit.

## Relationship model

```text theme={null}
Approved creation template
        ↓
Creation contract
        ↓
Neuro-Feature identifier
        ├── attributes and description
        ├── current owner or holder data exposed by the API
        ├── current state
        └── notes and event history
```

The exact creation and transfer sequence must come from a verified template and supported Neuron build. The existence of read operations does not prove that a guessed combination of contract and token operations will mint or transfer a feature.

## State-machine reasoning

For each stateful workflow, document:

| Question                       | Application requirement                                               |
| ------------------------------ | --------------------------------------------------------------------- |
| What is the current state?     | Read it from the documented operation or event                        |
| Which transitions are allowed? | Follow the approved contract/state-machine definition                 |
| Who can trigger a transition?  | Check identity, party, role, and privilege requirements               |
| Is the transition synchronous? | Handle accepted, pending, final, and failed outcomes as documented    |
| What evidence remains?         | Retain the feature/contract identifier and retrieve its event history |

## Available documentation

The [token guide](/neuron-api/guides/tokens-flow) covers inspection. No generic tutorial currently covers creation, state transitions, or ownership transfer; obtain those procedures from the target Neuron's operator.

## Reference

* [Tokens](/neuron-api/api-reference/tokens/overview)
* [State machines](/neuron-api/api-reference/state-machines/overview)