[wobs] update tracing docs to include compat date

src/content/changelog/workers/2025-11-06-automatic-tracing.mdx

@@ -0,0 +1,51 @@
+---
+title: Workers automatic tracing, now in open beta 
+description: Gain instant visibility into Workers execution with automatic tracing and OpenTelemetry exports
+products:
+  - workers
+date: 2025-11-06
+---
+
+Enable automatic tracing on your Workers, giving you detailed metadata and timing information for every operation your Worker performs. 
+
+![Tracing example](~/assets/images/workers-observability/R2_Screenshot.png)
+
+Tracing helps you identify performance bottlenecks, resolve errors, and understand how your Worker interacts with other services on the Workers platform. You can now answer questions like:
+* Which calls are slowing down my application?
+* Which queries to my database take the longest? 
+* What happened within a request that resulted in an error?
+
+**You can now:**
+* View traces alongside your logs in the Workers Observability dashboard
+* Export traces (and correlated logs) to any [OTLP-compatible destination](https://opentelemetry.io/docs/specs/otel/protocol/), such as [Honeycomb](/workers/observability/exporting-opentelemetry-data/honeycomb/), [Sentry](/workers/observability/exporting-opentelemetry-data/sentry/) or [Grafana](/workers/observability/exporting-opentelemetry-data/grafana-cloud/), by configuring a tracing destination in the [Cloudflare dashboard](https://dash.cloudflare.com/?to=/:account/workers-and-pages/observability/destinations)
+* Analyze and query across span attributes (operation type, status, duration, errors) 
+
+## To get started, set: 
+
+```jsonc
+{
+  "observability": { 
+    "tracing": {
+      "enabled": true
+    }
+  }
+}
+```
+
+Starting with the compatibility date of [2025-11-19](/workers/configuration/compatibility-flags/#automatic-tracing), the following will also enable tracing **in addition to** logs:
+
+```jsonc
+{
+  "observability": { 
+    "enabled": true
+  }
+}
+```
+
+
+## Want to learn more? 
+* [Read the announcement](https://blog.cloudflare.com/workers-tracing-now-in-open-beta/)
+* [Check out the documentation](/workers/observability/traces/)
+
+
+

src/content/compatibility-flags/automatic-tracing.md

@@ -0,0 +1,35 @@
+---
+_build:
+  publishResources: false
+  render: never
+  list: never
+
+name: "Automatic tracing"
+sort_date: "2025-11-05"
+enable_date: "2025-11-19"
+enable_flag: "enable_workers_observability_tracing"
+---
+
+This flag will enable [Workers Tracing](/workers/observability/traces/) by default if you have the following configured in your Wrangler configuration file:
+
+```json
+{
+	"observability": {
+			"enabled": true
+		}
+}
+```
+
+
+You can also explictly turn on automatic tracing without the flag and with older compatibility dates by setting the following: 
+
+
+```json
+{
+	"observability": {
+		"traces": {
+			"enabled": true,
+		}
+	}
+}
+```

src/content/docs/workers/observability/traces/index.mdx

@@ -32,32 +32,32 @@ For a full list of instrumented operations , see the [spans and attributes docum
 
 ### How to enable tracing
 
-If you have already set `observability.enabled = true` in your [wrangler configuration file](/workers/wrangler/configuration/#observability), tracing **and** logs will be automatically enabled.
+You can configure tracing by setting `observability.traces.enabled = true` in your [wrangler configuration file](/workers/wrangler/configuration/#observability).
 
 <WranglerConfig>
 
 ```json
 {
 	"observability": {
-		"enabled": true
+		"traces": {
+			"enabled": true,
+			// optional sampling rate (recommended for high-traffic workloads)
+			"head_sampling_rate": 0.05
+		}
 	}
 }
 ```
 
 </WranglerConfig>
 
-You can also configure tracing independently by setting `observability.traces.enabled = true` in your [wrangler configuration file](/workers/wrangler/configuration/#observability).
+Starting with the [compatibility date of 2025-11-19](/workers/configuration/compatibility-flags/#automatic-tracing), the following will also enable tracing **in addition to** logs. 
 
 <WranglerConfig>
 
 ```json
 {
 	"observability": {
-		"traces": {
-			"enabled": true,
-			// optional sampling rate (recommended for high-traffic workloads)
-			"head_sampling_rate": 0.05
-		}
+		"enabled": true
 	}
 }
 ```