workflows: step limit increase (#18398)

* workflows: step limit increase

256 -> 512

* workflows: changelog on step limits

Author: elithrar

src/content/changelogs/workflows.yaml

@@ -5,6 +5,12 @@ productLink: "/workflows/"
 productArea: Developer platform
 productAreaLink: /workers/platform/changelog/platform/
 entries:
+  - publish_date: "2024-11-30"
+    title: "Step limit increased"
+    description: |-
+      Workflows now allow you to define up to 512 steps in a single Workflow definition, up from the previous limit of 256. This limit will continue to increase during the course of the open beta.
+
+      If you have Workflows that need more steps, we recommend delegating additional work to other Workflows by [triggering a new Workflow](/workflows/build/trigger-workflows/) from within a step and passing any state as [parameters to that Workflow instance](/workflows/build/events-and-parameters/).
   - publish_date: "2024-11-21"
     title: "Fixed create instance API in Workers bindings"
     description: |-

src/content/docs/workflows/reference/limits.mdx

@@ -20,12 +20,12 @@ Many limits are inherited from those applied to Workers scripts and as documente
 | Duration (wall clock) per step [^3]       | Unlimited | Unlimited - for example, waiting on network I/O calls or querying a database |
 | Maximum persisted state per step          | 1MiB (2^20 bytes) | 1MiB (2^20 bytes) |
 | Maximum state that can be persisted per Workflow instance | 100MB | 1GB |
-| Maximum `step.sleep` duration             | 365 days (1 year) [^1] |
-| Maximum steps per Workflow                | 256 [^1] |
+| Maximum `step.sleep` duration             | 365 days (1 year) [^1] | 365 days (1 year) [^1] |
+| Maximum steps per Workflow                | 512 [^1] | 512 [^1] |
 | Maximum Workflow executions               | 100,000 per day [shared with Workers daily limit](/workers/platform/limits/#worker-limits) | Unlimited |
 | Concurrent Workflow instances (executions)   | 25 | 100 [^1] |
 | Retention limit for completed Workflow state | 3 days | 30 days [^2] |
-| Maximum length of a Workflow ID [^4]         | 64 characters |
+| Maximum length of a Workflow ID [^4]         | 64 characters | 64 characters |
 
 [^1]: This limit will be reviewed and revised during the open beta for Workflows. Follow the [Workflows changelog](/workflows/reference/changelog/) for updates.