[wobs] update tracing docs to include compat date (#26298)

* [wobs] update tracing docs to include compat date

* Removes default on date

---------

Co-authored-by: Mike Nomitch <[email protected]>

Author: nevikashah

src/assets/images/workers-observability/R2_Screenshot.png

@@ -0,0 +1,44 @@
+---
+title: Workers automatic tracing, now in open beta
+description: Gain instant visibility into Workers execution with automatic tracing and OpenTelemetry exports
+products:
+  - workers
+date: 2025-11-07
+---
+
+import { Render } from "~/components";
+
+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,
+		},
+	},
+}
+```
+
+<Render file="tracing-beta-config-note" product="workers" />
+
+## 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/changelog/workers/2025-11-07-automatic-tracing.mdx

@@ -0,0 +1,32 @@
+---
+_build:
+  publishResources: false
+  render: never
+  list: never
+
+name: "Automatic tracing"
+sort_date: "2025-11-05"
+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/compatibility-flags/automatic-tracing.md

@@ -7,7 +7,7 @@ sidebar:
     text: Beta
 ---
 
-import { WranglerConfig } from "~/components";
+import { WranglerConfig, Render } from "~/components";
 
 ### What is Workers tracing?
 
@@ -32,21 +32,7 @@ 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.
-
-<WranglerConfig>
-
-```json
-{
-	"observability": {
-		"enabled": true
-	}
-}
-```
-
-</WranglerConfig>
-
-You can also configure tracing independently by setting `observability.traces.enabled = true` in your [wrangler configuration file](/workers/wrangler/configuration/#observability).
+You can configure tracing by setting `observability.traces.enabled = true` in your [wrangler configuration file](/workers/wrangler/configuration/#observability).
 
 <WranglerConfig>
 
@@ -64,7 +50,7 @@ You can also configure tracing independently by setting `observability.traces.en
 
 </WranglerConfig>
 
-
+<Render file="tracing-beta-config-note" product="workers" />
 
 ### Exporting OpenTelemetry traces to a 3rd party destination
 

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

@@ -0,0 +1,13 @@
+---
+{}
+---
+
+:::note
+In the future, Cloudflare plans to enable automatic tracing in addition to logs
+when you set `observability.enabled = true` in your Wrangler configuration.
+
+While automatic tracing is in early beta, this setting will not enable tracing by default,
+and will only enable logs.
+
+An updated [`compatibility_date`](/workers/configuration/compatibility-dates/) will be required for this change to take effect.
+:::