From 6e0757cd86476a6f6e445dbf99c8c95167cca1ec Mon Sep 17 00:00:00 2001
From: "sentry-junior[bot]"
 <264270552+sentry-junior[bot]@users.noreply.github.com>
Date: Wed, 11 Nov 2026 17:37:06 +0000
Subject: [PATCH] chore(deno): Note that OTel setup defaulting to on is
 unintentional
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Co-Authored-By: Jan Peer Stöcklmair <jan.peer@sentry.io>
---
 packages/deno/src/sdk.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/deno/src/sdk.ts b/packages/deno/src/sdk.ts
index 96af20a57b87..f003b462f5a7 100644
--- a/packages/deno/src/sdk.ts
+++ b/packages/deno/src/sdk.ts
@@ -134,6 +134,8 @@ function _init(options: DenoOptions, getDefaultIntegrationsImpl: (options: Optio
 
   // Set up OpenTelemetry compatibility to capture spans from libraries using @opentelemetry/api
   // Note: This is separate from Deno's native OTEL support and doesn't capture auto-instrumented spans
+  // TODO(v12): Default this to `false` (opt-in, like Cloudflare). Defaulting to `true` was an oversight from #17445,
+  // not a deliberate choice, but flipping it is a breaking change.
   if (options.enableOpenTelemetrySetup ?? true) {
     setupOpenTelemetryTracer();
   }