DOC-6765 added client support and versioning policy page

content/develop/clients/_index.md

@@ -47,6 +47,9 @@ However, we contribute new features, offer guidance, and collaborate with the co
 on a best-effort basis to help ensure these libraries remain reliable and up-to-date.
 {{< /note >}}
 
+See [Client library support and versioning policy]({{< relref "/develop/clients/version-support" >}})
+for details about how Redis maintains, versions, and tests the official client libraries.
+
 We also provide several higher-level
 [object mapping (OM)]({{< relref "/develop/clients/om-clients" >}})
 libraries for [Python]({{< relref "/integrate/redisom-for-python" >}}),

content/develop/clients/version-support.md

@@ -0,0 +1,94 @@
+---
+aliases: /develop/connect/clients/version-support
+categories:
+- docs
+- develop
+- stack
+- oss
+- rs
+- rc
+- oss
+- kubernetes
+- clients
+description: Understand how Redis maintains and versions its official client libraries
+linkTitle: Support & versioning
+title: Client library support and versioning policy
+weight: 150
+---
+
+Official Redis client libraries are covered by the
+[Redis Software Support Policy](https://redis.io/legal/software-support-policy/).
+This page describes the client-library-specific maintenance and versioning
+policy that clarifies active support, testing expectations, and backporting
+rules for those clients.
+
+The policy is based on the non-EOL Redis Server **major.minor** versions
+currently available in Redis Cloud, as listed in
+[Supported database versions]({{< relref "/operate/rc/databases/version-management#supported-database-versions" >}}).
+
+## Versioning
+
+Redis client libraries use a `major.minor.patch` versioning scheme that follows
+[Semantic Versioning 2.0.0](https://semver.org/):
+
+-   **Major** versions may introduce incompatible API changes.
+-   **Minor** versions add backward-compatible functionality.
+-   **Patch** versions contain backward-compatible bug fixes.
+
+## Maintained release line
+
+The latest `major.minor` release of each official Redis client library is the
+primary maintained release line. In practice, this means it is the line under
+active development and the one where regular bug fixes and new features are
+delivered.
+
+Client libraries follow a forward-moving model: each new `major.minor` release
+is cut from the main branch, and a version branch is created at the same time
+for future patch and maintenance releases (for example, `5.2.x`).
+
+## Supported Redis API versions
+
+Each new client `major`, `minor`, and `patch` release is tested against a
+compatibility matrix of the
+[non-EOL Redis API versions]({{< relref "/operate/rc/databases/version-management#supported-database-versions" >}})
+currently available. For example, if the supported API versions are 6.2, 7.2,
+and 7.4, then each client release is tested against all three. The release notes
+for each client report the compatibility matrix used for testing.
+
+The table below shows some examples of client releases and the API versions they
+are tested against:
+
+| Example client release | Supported Redis API versions | Client testing targets |
+| :-- | :-- | :-- |
+| Jedis 5.2 | 6.2, 7.2, 7.4 | Test with 6.2, 7.2, 7.4 |
+| redis-py 5.3 | 6.2, 7.2, 7.4, 8.0 | Test with 6.2, 7.2, 7.4, 8.0 |
+| Jedis 6.0 | 6.2, 7.2, 7.4, 8.2 | Test with 6.2, 7.2, 7.4, 8.2 |
+
+A similar matrix is also published on each client library's GitHub repository.
+
+## Bugs, vulnerabilities, and community contributions
+
+Redis keeps innovation on the latest maintained line and reserves older lines
+for critical fixes and security updates. This keeps the support matrix clean and
+reduces the testing and maintenance overhead of supporting many branches at once.
+
+-   **Regular bug fixes** are delivered either in a new `major.minor` release or,
+    depending on the overall content, in a new patch release on the current
+    maintained line. Non-critical bug fixes and new features are *not* backported
+    to older client `major.minor` versions. For example, if a bug is found in a
+    client library release 5.2 and the fix is released in 5.2.1, the same
+    non-critical fix is not backported to older versions such as 5.1.
+-   **Critical bugs and security vulnerabilities**, including CVEs, are backported
+    to the latest patch version of a `major.minor` and may also be backported to
+    patch releases of older versions.
+-   **Community-contributed fixes** to older versions are reviewed on a
+    case-by-case basis. If a fix is considered useful for future versions, it is
+    also ported to the main branch for a future major, minor, or patch release.
+
+## Recommendations
+
+-   Use the latest `major.minor` client library release available.
+-   Read the release notes for version-specific changes and for the compatibility
+    matrix used in testing.
+-   Test upgrades with production-like workloads and configurations before rolling
+    them out broadly, especially when moving across major or minor versions.