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

# Compatibility

# Compatibility

***

## Reference · Compatibility

> **Reference purpose** — Make support claims precise enough that teams can plan upgrades and deployments without guesswork.

A compatibility envelope for Node, React, browsers, package exports, and known limitations.

### Key concepts

<Columns cols={3}>
  <Card title="Runtime" icon="sparkles">
    Node 20, 22, 24
  </Card>

  <Card title="Package" icon="shield-check">
    Exports and types
  </Card>

  <Card title="Feature" icon="gauge-high">
    Maturity label
  </Card>
</Columns>

### Reference model

```mermaid placement="top-right" theme={null}
flowchart TB
    runtime[Node runtime] --> framework[Jeston package]
    framework --> react[React behavior]
    react --> browser[Browser target]
    framework --> adapter[Provider adapter]
```

### Contract summary

| Property | Definition        | Review question                      |
| -------- | ----------------- | ------------------------------------ |
| Runtime  | Node 20, 22, 24   | CI evidence required.                |
| Package  | Exports and types | Smoke import from a consumer.        |
| Feature  | Maturity label    | Do not overpromise roadmap behavior. |

### Interpretation

Compatibility is a product feature: confidence depends on what is supported, tested, experimental, or explicitly out of scope.

> **Reference note**
>
> A compatibility statement is useful only when it can be checked.

### Implementation notes

| Engineering move       | Guidance                                                                                    |
| ---------------------- | ------------------------------------------------------------------------------------------- |
| **Declare the matrix** | List supported Node versions, package managers, React versions, and deployment assumptions. |
| **Test the matrix**    | Run typecheck, tests, build, and package smoke import on every supported runtime.           |
| **Label maturity**     | Separate stable, experimental, roadmap, and unsupported behavior.                           |
| **Plan migration**     | Document breaking changes, deprecations, and rollback options.                              |

### Decision lens

| Mode             | Practical emphasis                          |
| ---------------- | ------------------------------------------- |
| **Supported**    | Covered by CI and release expectations.     |
| **Experimental** | Usable with an explicit risk statement.     |
| **Unsupported**  | Do not infer behavior from a local success. |

## Related topics

<Columns cols={3}>
  * [circle-check · **Verify releases**](/jeston/jeston/operations/release-checks) — Read the focused guide for this boundary.
  * [code · **Read stable types**](/jeston/jeston/reference/types) — Read the focused guide for this boundary.
  * [atom · **Review RSC maturity**](/jeston/jeston/core/react-server-components) — Read the focused guide for this boundary.
</Columns>

## References

[1]: https://github.com/jeffersoncampos12p-dev/jeston "Jeston source repository"

[2]: https://www.npmjs.com/package/@kvantjs/jeston "Jeston package on npm"

[3]: https://nodejs.org/api/http.html "Node.js HTTP API"

[4]: https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal "AbortSignal Web API"

[5]: https://react.dev/reference/react-dom/server "React server rendering APIs"

[6]: https://www.typescriptlang.org/docs/handbook/intro.html "TypeScript handbook"