diff --git a/Cargo.toml b/Cargo.toml
index cca7eea1..c2552c3f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ members = [
 resolver = "3"
 
 [workspace.package]
-version = "5.10.3"
+version = "5.11.0"
 repository = "https://github.com/cloudflare/foundations"
 edition = "2024"
 authors = ["Cloudflare"]
@@ -42,10 +42,10 @@ check-cfg = [
 [workspace.dependencies]
 anyhow = "1.0.102"
 backtrace = "0.3.76"
-foundations = { version = "5.10.3", path = "./foundations", default-features = false }
-foundations-macros = { version = "=5.10.3", path = "./foundations-macros", default-features = false }
+foundations = { version = "5.11.0", path = "./foundations", default-features = false }
+foundations-macros = { version = "=5.11.0", path = "./foundations-macros", default-features = false }
 foundations-metrics-registry = { version = "1.0.0", path = "./foundations-metrics-registry", default-features = false }
-foundations-metrics = { version = "0.1.0-beta.3", path = "./foundations-metrics", default-features = false }
+foundations-metrics = { version = "0.1.0-beta.4", path = "./foundations-metrics", default-features = false }
 bindgen = { version = "0.72.1", default-features = false }
 cc = "1.2.61"
 cf-rustracing = "1.4.1"
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index c98d0f98..7da8fc29 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,4 +1,14 @@
 
+5.11.0
+- 2026-10-09 feat(telemetry): skip RwLock for unsampled SharedSpanHandles
+- 2026-10-09 refactor(telemetry): share user span sampling state between handles
+- 2026-10-08 feat(telemetry): discard user spans
+- 2026-10-08 chore(deps): bump cf-rustracing to 1.4.1
+- 2026-10-08 feat(telemetry): set start and finish times on user spans
+- 2026-10-08 metrics: Add LowCardinalityFamily and associated #[metric] logic
+- 2026-10-08 fix: libc 0.2.190 breaks semver
+- 2026-10-08 fix: Rust 1.99 lints
+
 5.10.3
 - 2026-09-29 fix: clippy and rustc lints in span_with_probe example
 - 2026-09-29 feat(telemetry): drop duplicate args_len information from SpanProbe
diff --git a/foundations-metrics/Cargo.toml b/foundations-metrics/Cargo.toml
index 32873fb0..06360e90 100644
--- a/foundations-metrics/Cargo.toml
+++ b/foundations-metrics/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "foundations-metrics"
 description = "Metric types and encoders for the Foundations stack."
-version = "0.1.0-beta.3"
+version = "0.1.0-beta.4"
 readme = "README.md"
 repository = { workspace = true }
 edition = { workspace = true }
diff --git a/foundations-metrics/RELEASE_NOTES.md b/foundations-metrics/RELEASE_NOTES.md
index 0ec0e573..456e57de 100644
--- a/foundations-metrics/RELEASE_NOTES.md
+++ b/foundations-metrics/RELEASE_NOTES.md
@@ -1,5 +1,9 @@
 
-0.1.0-beta.3
+0.1.0-beta.4
+- 2026-10-08 metrics: Add LowCardinalityFamily and associated #[metric] logic
+
+foundations-metrics-v0.1.0-beta.3
+- 2026-08-26 Release 5.9.2 (#259)
 - 2026-08-26 fix(metrics): terminate classic histogram buckets with +Inf
 - 2026-08-18 feat(metrics): expose max_zero_threshold on NativeHistogramBuilder
 - 2026-08-17 feat(metrics): let native histograms recover lost resolution
diff --git a/foundations/src/telemetry/tracing/internal.rs b/foundations/src/telemetry/tracing/internal.rs
index ea220a23..42b65abc 100644
--- a/foundations/src/telemetry/tracing/internal.rs
+++ b/foundations/src/telemetry/tracing/internal.rs
@@ -65,11 +65,15 @@ impl SharedSpanHandle {
         static INACTIVE: Span = Span::inactive();
 
         match self {
-            SharedSpanHandle::Tracked { span, .. } => f(&span.read()),
+            SharedSpanHandle::Tracked { span, is_sampled } if *is_sampled => f(&span.read()),
             SharedSpanHandle::Untracked(rw_lock) => f(&rw_lock.read()),
             #[cfg(feature = "user-tracing")]
-            SharedSpanHandle::User(slot) | SharedSpanHandle::Deferred(slot) => f(&slot.span.read()),
-            SharedSpanHandle::Inactive => f(&INACTIVE),
+            SharedSpanHandle::User(slot) | SharedSpanHandle::Deferred(slot)
+                if slot.is_sampled() =>
+            {
+                f(&slot.span.read())
+            }
+            _ => f(&INACTIVE),
         }
     }
 
@@ -79,13 +83,15 @@ impl SharedSpanHandle {
     /// can't substitute a shared placeholder.
     pub(crate) fn with_write(&self, f: impl FnOnce(&mut Span)) {
         match self {
-            SharedSpanHandle::Tracked { span, .. } => f(&mut span.write()),
+            SharedSpanHandle::Tracked { span, is_sampled } if *is_sampled => f(&mut span.write()),
             SharedSpanHandle::Untracked(rw_lock) => f(&mut rw_lock.write()),
             #[cfg(feature = "user-tracing")]
-            SharedSpanHandle::User(slot) | SharedSpanHandle::Deferred(slot) => {
+            SharedSpanHandle::User(slot) | SharedSpanHandle::Deferred(slot)
+                if slot.is_sampled() =>
+            {
                 f(&mut slot.span.write())
             }
-            SharedSpanHandle::Inactive => {}
+            _ => {}
         }
     }
 }