Builds: env var increase [do not merge, waiting for release] (#26681)

* Builds: env var increase

* applying review

Author: yomna-shousha

src/content/changelog/workers/2025-11-21-builds-env-var-increase.mdx

@@ -0,0 +1,18 @@
+---
+title: Environment variable limits increase for Workers Builds
+description: Workers Builds now supports up to 64 environment variables per Worker with 5 KB per variable, up from a previous 5 KB total limit.
+date: 2025-11-21
+products:
+  - workers
+---
+
+
+
+[Workers Builds](/workers/ci-cd/builds/) now supports up to 64 environment variables, and each environment variable can be up to 5 KB in size. The previous limit was 5 KB total across all environment variables.
+
+
+
+This change enables better support for complex build configurations, larger application settings, and more flexible CI/CD workflows.
+
+
+For more details, refer to the [build limits documentation](/workers/ci-cd/builds/limits-and-pricing/#environment-variable-limits).

src/content/docs/workers/ci-cd/builds/limits-and-pricing.mdx

@@ -6,7 +6,7 @@ sidebar:
   order: 9
 ---
 
-Workers Builds has the following limits. While in open beta, these limits are subject to change.
+Workers Builds has the following limits. 
 
 | Metric                | Free plan       | Paid plans                                 |
 | --------------------- | --------------- | ------------------------------------------ |
@@ -16,6 +16,8 @@ Workers Builds has the following limits. While in open beta, these limits are su
 | **CPU**               | 2 vCPU          | 4 vCPU                                     |
 | **Memory**            | 8 GB            | 8 GB                                       |
 | **Disk space**        | 20 GB           | 20 GB                                      |
+| **Environment variables**  | 64              | 64                                        |
+| **Size per environment variable**  | 5 KB            | 5 KB                                       |
 
 ## Definitions
 
@@ -25,3 +27,5 @@ Workers Builds has the following limits. While in open beta, these limits are su
 - **vCPU**: The number of CPU cores available to your build.
 - **Memory**: The amount of memory available to your build.
 - **Disk space**: The amount of disk space available to your build.
+- **Environment variables**: The number of custom environment variables you can configure per Worker.
+- **Size per environment variable**: The maximum size for each individual environment variable.