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

# Language maturity levels

This document defines the language maturity levels used on the [Supported languages](/supported-languages) page.

## Semgrep Code

Semgrep Code languages can be classified into four maturity levels:

* Generally available (GA)
* Beta
* Experimental
* Community supported\*

\*Community supported languages meet the parse rate and syntax requirements of
**Experimental** languages. Users can still access community rules or write their
own rules.

| Feature             | GA                                                                                               | Beta                                                                                          | Experimental                                                                                                          | Community supported                                                                                                                                      |
| :------------------ | :----------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Support             | Highest quality support by the Semgrep team. Reported issues are resolved promptly.              | Supported by the Semgrep team. Reported issues are fixed after GA languages.                  | There are limitations to this language's functionality. Reported issues are tracked and prioritized with best effort. | These languages are supported by the Semgrep community. While Semgrep may develop rules or engine updates for these languages, they are not prioritized. |
| Parse Rate          | 99%+                                                                                             | 95%+                                                                                          | 90%+                                                                                                                  | 90%+                                                                                                                                                     |
| Number of Pro rules | 10+                                                                                              | 5+                                                                                            | 0+. Query the [Registry](https://semgrep.dev/r) to see if any rules exist for your language.                          | 0+. Query the [Registry](https://semgrep.dev/r) to see if any rules exist for your language.                                                             |
| Semgrep syntax      | Regex, equivalence, deep expression operators, types and typing. All features supported in Beta. | Complete metavariable support, metavariable equality. All features supported in Experimental. | Syntax, ellipsis operator, basic metavariable functionality.                                                          | Syntax, ellipsis operator, basic metavariable functionality.                                                                                             |

## Semgrep Supply Chain

Semgrep Supply Chain has two language maturity levels:

* Generally available
* Beta

| Feature                                                                                              | Generally available                                                                                                                                                     | Beta                                                                                                                                                                                                                   |
| :--------------------------------------------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Number of reachability rules                                                                         | As defined by [CVE coverage](/semgrep-supply-chain/requirements-and-feature-support#cve-coverage).                                                                      | All critical severity CVEs from [supported sources](/semgrep-supply-chain/requirements-and-feature-support#supported-sources) starting 2022 onwards, for packages used by customers with an active, paid subscription. |
| Semgrep, Inc. rule-writing support                                                                   | Quickly support CVE coverage with reachability analysis for all critical and high vulnerabilities based on the latest [security advisories](https://nvd.nist.gov/vuln). | Coverage for CVEs but without reachability analysis.                                                                                                                                                                   |
| [Semgrep Community Edition (CE) language support](/supported-languages#semgrep-oss-language-support) | Semgrep CE support is GA.                                                                                                                                               | Semgrep CE support is at least Beta.                                                                                                                                                                                   |

Not finding what you need in this doc? Ask questions in our [Community Slack group](https://go.semgrep.dev/slack), or see [Support](/support/) for other ways to get help.