diff --git a/crates/executor-core/src/sdk/bridge.rs b/crates/executor-core/src/sdk/bridge.rs
index 57b6f8f..3179a7c 100644
--- a/crates/executor-core/src/sdk/bridge.rs
+++ b/crates/executor-core/src/sdk/bridge.rs
@@ -7,8 +7,41 @@
 //! `sdk_contract.rs::json_round_trip_preserves_nested_shapes` pins the
 //! observable round-trip.
 
-use rhai::{Dynamic, Map};
+use rhai::{Dynamic, EvalAltResult, Map};
 use serde_json::Value as Json;
+use tokio::runtime::Handle as TokioHandle;
+
+/// Run an async future inside the synchronous Rhai context.
+///
+/// `LocalExecutorClient` wraps script execution in `spawn_blocking`, so
+/// the current Tokio runtime is reachable via `Handle::current()`. We
+/// block on it directly; we are NOT calling this from an async task,
+/// so blocking is the correct primitive.
+///
+/// Prefix each error string with `service` so a script reading the
+/// runtime error message learns which SDK surface threw it.
+///
+/// # Errors
+///
+/// Wraps the future's error variant or "no tokio runtime available" in
+/// `EvalAltResult::ErrorRuntime`, suitable to return from a Rhai-
+/// registered fn.
+pub fn block_on<T, E, F>(service: &str, fut: F) -> Result<T, Box<EvalAltResult>>
+where
+    F: std::future::Future<Output = Result<T, E>>,
+    E: std::fmt::Display,
+{
+    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
+        EvalAltResult::ErrorRuntime(
+            format!("{service}: no tokio runtime available: {e}").into(),
+            rhai::Position::NONE,
+        )
+        .into()
+    })?;
+    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
+        EvalAltResult::ErrorRuntime(format!("{service}: {err}").into(), rhai::Position::NONE).into()
+    })
+}
 
 /// Convert a `serde_json::Value` into a Rhai `Dynamic` suitable for
 /// pushing into a script's scope. Numbers prefer the narrowest type
diff --git a/crates/executor-core/src/sdk/dead_letters.rs b/crates/executor-core/src/sdk/dead_letters.rs
index a9e3505..873bb2e 100644
--- a/crates/executor-core/src/sdk/dead_letters.rs
+++ b/crates/executor-core/src/sdk/dead_letters.rs
@@ -16,9 +16,9 @@
 use std::str::FromStr;
 use std::sync::Arc;
 
-use picloud_shared::{DeadLetterError, DeadLetterId, SdkCallCx, Services};
+use picloud_shared::{DeadLetterId, SdkCallCx, Services};
 use rhai::{Engine as RhaiEngine, EvalAltResult, Module};
-use tokio::runtime::Handle as TokioHandle;
+use super::bridge::block_on;
 use uuid::Uuid;
 
 pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<SdkCallCx>) {
@@ -33,7 +33,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
                 let dl_id = parse_dl_id(id)?;
                 let svc = svc.clone();
                 let cx = cx.clone();
-                block_on(async move { svc.replay(&cx, dl_id).await })
+                block_on("dead_letters", async move { svc.replay(&cx, dl_id).await })
             },
         );
     }
@@ -47,7 +47,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
                 let reason = reason.to_string();
                 let svc = svc.clone();
                 let cx = cx.clone();
-                block_on(async move { svc.resolve(&cx, dl_id, &reason).await })
+                block_on("dead_letters", async move { svc.resolve(&cx, dl_id, &reason).await })
             },
         );
     }
@@ -66,19 +66,3 @@ fn parse_dl_id(s: &str) -> Result<DeadLetterId, Box<EvalAltResult>> {
         })
 }
 
-fn block_on<F>(fut: F) -> Result<(), Box<EvalAltResult>>
-where
-    F: std::future::Future<Output = Result<(), DeadLetterError>> + Send,
-{
-    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(
-            format!("dead_letters: no tokio runtime available: {e}").into(),
-            rhai::Position::NONE,
-        )
-        .into()
-    })?;
-    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(format!("dead_letters: {err}").into(), rhai::Position::NONE)
-            .into()
-    })
-}
diff --git a/crates/executor-core/src/sdk/docs.rs b/crates/executor-core/src/sdk/docs.rs
index e5bb07d..b7ff11c 100644
--- a/crates/executor-core/src/sdk/docs.rs
+++ b/crates/executor-core/src/sdk/docs.rs
@@ -23,12 +23,11 @@
 
 use std::sync::Arc;
 
-use picloud_shared::{DocId, DocRow, DocsError, DocsService, SdkCallCx, Services};
+use picloud_shared::{DocId, DocRow, DocsService, SdkCallCx, Services};
 use rhai::{Array, Dynamic, Engine as RhaiEngine, EvalAltResult, Map, Module};
-use tokio::runtime::Handle as TokioHandle;
 use uuid::Uuid;
 
-use super::bridge::{dynamic_to_json, json_to_dynamic};
+use super::bridge::{block_on, dynamic_to_json, json_to_dynamic};
 
 /// Per-call handle captured by the Rhai SDK. Cheap to clone (two Arcs
 /// plus an owned string).
@@ -79,7 +78,7 @@ fn register_create(engine: &mut RhaiEngine) {
         |handle: &mut DocsHandle, data: Map| -> Result<String, Box<EvalAltResult>> {
             let h = handle.clone();
             let json = dynamic_to_json(&Dynamic::from(data));
-            let id = block_on(async move { h.service.create(&h.cx, &h.collection, json).await })?;
+            let id = block_on("docs", async move { h.service.create(&h.cx, &h.collection, json).await })?;
             Ok(id.to_string())
         },
     );
@@ -92,7 +91,7 @@ fn register_get(engine: &mut RhaiEngine) {
             let h = handle.clone();
             let parsed_id = parse_doc_id(id)?;
             let row =
-                block_on(async move { h.service.get(&h.cx, &h.collection, parsed_id).await })?;
+                block_on("docs", async move { h.service.get(&h.cx, &h.collection, parsed_id).await })?;
             Ok(row.map_or(Dynamic::UNIT, |d| Dynamic::from(doc_to_map(&d))))
         },
     );
@@ -104,7 +103,7 @@ fn register_find(engine: &mut RhaiEngine) {
         |handle: &mut DocsHandle, filter: Map| -> Result<Array, Box<EvalAltResult>> {
             let h = handle.clone();
             let json = dynamic_to_json(&Dynamic::from(filter));
-            let rows = block_on(async move { h.service.find(&h.cx, &h.collection, json).await })?;
+            let rows = block_on("docs", async move { h.service.find(&h.cx, &h.collection, json).await })?;
             Ok(rows
                 .iter()
                 .map(|d| Dynamic::from(doc_to_map(d)))
@@ -120,7 +119,7 @@ fn register_find_one(engine: &mut RhaiEngine) {
             let h = handle.clone();
             let json = dynamic_to_json(&Dynamic::from(filter));
             let row =
-                block_on(async move { h.service.find_one(&h.cx, &h.collection, json).await })?;
+                block_on("docs", async move { h.service.find_one(&h.cx, &h.collection, json).await })?;
             Ok(row.map_or(Dynamic::UNIT, |d| Dynamic::from(doc_to_map(&d))))
         },
     );
@@ -133,7 +132,7 @@ fn register_update(engine: &mut RhaiEngine) {
             let h = handle.clone();
             let parsed_id = parse_doc_id(id)?;
             let json = dynamic_to_json(&Dynamic::from(data));
-            block_on(async move {
+            block_on("docs", async move {
                 h.service
                     .update(&h.cx, &h.collection, parsed_id, json)
                     .await
@@ -148,7 +147,7 @@ fn register_delete(engine: &mut RhaiEngine) {
         |handle: &mut DocsHandle, id: &str| -> Result<bool, Box<EvalAltResult>> {
             let h = handle.clone();
             let parsed_id = parse_doc_id(id)?;
-            block_on(async move { h.service.delete(&h.cx, &h.collection, parsed_id).await })
+            block_on("docs", async move { h.service.delete(&h.cx, &h.collection, parsed_id).await })
         },
     );
 }
@@ -192,7 +191,7 @@ fn list_call(
     limit: u32,
 ) -> Result<Map, Box<EvalAltResult>> {
     let h = handle.clone();
-    let page = block_on(async move {
+    let page = block_on("docs", async move {
         h.service
             .list(&h.cx, &h.collection, cursor.as_deref(), limit)
             .await
@@ -233,23 +232,3 @@ fn parse_doc_id(id: &str) -> Result<DocId, Box<EvalAltResult>> {
     })
 }
 
-/// Mirrors `kv.rs::block_on` — Tokio runtime is reachable from inside
-/// the `spawn_blocking` wrapper that owns Rhai execution. Errors
-/// prefix with `"docs: "` so scripts see `docs: forbidden`,
-/// `docs: document not found`, `docs: unsupported operator: …`, etc.
-fn block_on<F, T>(fut: F) -> Result<T, Box<EvalAltResult>>
-where
-    F: std::future::Future<Output = Result<T, DocsError>> + Send,
-    T: Send,
-{
-    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(
-            format!("docs: no tokio runtime available: {e}").into(),
-            rhai::Position::NONE,
-        )
-        .into()
-    })?;
-    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(format!("docs: {err}").into(), rhai::Position::NONE).into()
-    })
-}
diff --git a/crates/executor-core/src/sdk/email.rs b/crates/executor-core/src/sdk/email.rs
index 3ac9775..de14a35 100644
--- a/crates/executor-core/src/sdk/email.rs
+++ b/crates/executor-core/src/sdk/email.rs
@@ -26,9 +26,9 @@
 
 use std::sync::Arc;
 
-use picloud_shared::{EmailError, OutboundEmail, SdkCallCx, Services};
+use picloud_shared::{OutboundEmail, SdkCallCx, Services};
 use rhai::{Array, Engine as RhaiEngine, EvalAltResult, Map, Module};
-use tokio::runtime::Handle as TokioHandle;
+use super::bridge::block_on;
 
 pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<SdkCallCx>) {
     let svc = services.email.clone();
@@ -43,7 +43,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
             email.html = None; // text-only path
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.send(&cx, email).await })
+            block_on("email", async move { svc.send(&cx, email).await })
         });
     }
 
@@ -62,7 +62,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
                 }
                 let svc = svc.clone();
                 let cx = cx.clone();
-                block_on(async move { svc.send(&cx, email).await })
+                block_on("email", async move { svc.send(&cx, email).await })
             },
         );
     }
@@ -130,21 +130,3 @@ fn runtime_err(msg: &str) -> Box<EvalAltResult> {
     EvalAltResult::ErrorRuntime(msg.into(), rhai::Position::NONE).into()
 }
 
-/// Run an `EmailService` future inside the synchronous Rhai context,
-/// mapping any `EmailError` to a Rhai runtime error. Mirrors
-/// `kv::block_on`.
-fn block_on<F>(fut: F) -> Result<(), Box<EvalAltResult>>
-where
-    F: std::future::Future<Output = Result<(), EmailError>> + Send,
-{
-    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(
-            format!("email: no tokio runtime available: {e}").into(),
-            rhai::Position::NONE,
-        )
-        .into()
-    })?;
-    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(format!("email: {err}").into(), rhai::Position::NONE).into()
-    })
-}
diff --git a/crates/executor-core/src/sdk/files.rs b/crates/executor-core/src/sdk/files.rs
index fa146ec..19b8ff0 100644
--- a/crates/executor-core/src/sdk/files.rs
+++ b/crates/executor-core/src/sdk/files.rs
@@ -23,11 +23,9 @@
 
 use std::sync::Arc;
 
-use picloud_shared::{
-    FileMeta, FileUpdate, FilesError, FilesService, NewFile, SdkCallCx, Services,
-};
+use picloud_shared::{FileMeta, FileUpdate, FilesService, NewFile, SdkCallCx, Services};
 use rhai::{Array, Dynamic, Engine as RhaiEngine, EvalAltResult, Map, Module};
-use tokio::runtime::Handle as TokioHandle;
+use super::bridge::block_on;
 
 /// Per-call handle captured by the Rhai SDK. Cheap to clone (two Arcs
 /// plus an owned string).
@@ -84,7 +82,7 @@ fn register_create(engine: &mut RhaiEngine) {
                 content_type,
                 data,
             };
-            let id = block_on(async move { h.service.create(&h.cx, &h.collection, new).await })?;
+            let id = block_on("files", async move { h.service.create(&h.cx, &h.collection, new).await })?;
             Ok(id.to_string())
         },
     );
@@ -96,7 +94,7 @@ fn register_head(engine: &mut RhaiEngine) {
         |handle: &mut FilesHandle, id: &str| -> Result<Dynamic, Box<EvalAltResult>> {
             let h = handle.clone();
             let id = id.to_string();
-            let meta = block_on(async move { h.service.head(&h.cx, &h.collection, &id).await })?;
+            let meta = block_on("files", async move { h.service.head(&h.cx, &h.collection, &id).await })?;
             Ok(meta.map_or(Dynamic::UNIT, |m| file_meta_to_map(&m).into()))
         },
     );
@@ -108,7 +106,7 @@ fn register_get(engine: &mut RhaiEngine) {
         |handle: &mut FilesHandle, id: &str| -> Result<Dynamic, Box<EvalAltResult>> {
             let h = handle.clone();
             let id = id.to_string();
-            let bytes = block_on(async move { h.service.get(&h.cx, &h.collection, &id).await })?;
+            let bytes = block_on("files", async move { h.service.get(&h.cx, &h.collection, &id).await })?;
             Ok(bytes.map_or(Dynamic::UNIT, Dynamic::from_blob))
         },
     );
@@ -128,7 +126,7 @@ fn register_update(engine: &mut RhaiEngine) {
                 name,
                 content_type,
             };
-            block_on(async move { h.service.update(&h.cx, &h.collection, &id, upd).await })
+            block_on("files", async move { h.service.update(&h.cx, &h.collection, &id, upd).await })
         },
     );
 }
@@ -139,7 +137,7 @@ fn register_delete(engine: &mut RhaiEngine) {
         |handle: &mut FilesHandle, id: &str| -> Result<bool, Box<EvalAltResult>> {
             let h = handle.clone();
             let id = id.to_string();
-            block_on(async move { h.service.delete(&h.cx, &h.collection, &id).await })
+            block_on("files", async move { h.service.delete(&h.cx, &h.collection, &id).await })
         },
     );
 }
@@ -193,7 +191,7 @@ fn list_call(
     limit: u32,
 ) -> Result<Map, Box<EvalAltResult>> {
     let h = handle.clone();
-    let page = block_on(async move {
+    let page = block_on("files", async move {
         h.service
             .list(&h.cx, &h.collection, cursor.as_deref(), limit)
             .await
@@ -260,22 +258,3 @@ fn require_blob(meta: &Map, field: &'static str) -> Result<Vec<u8>, Box<EvalAltR
     }
 }
 
-/// Run an async future inside the synchronous Rhai context. Mirrors
-/// `kv::block_on`; safe because `LocalExecutorClient` runs the script
-/// under `spawn_blocking`, so a runtime handle is reachable.
-fn block_on<F, T>(fut: F) -> Result<T, Box<EvalAltResult>>
-where
-    F: std::future::Future<Output = Result<T, FilesError>> + Send,
-    T: Send,
-{
-    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(
-            format!("files: no tokio runtime available: {e}").into(),
-            rhai::Position::NONE,
-        )
-        .into()
-    })?;
-    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(format!("files: {err}").into(), rhai::Position::NONE).into()
-    })
-}
diff --git a/crates/executor-core/src/sdk/kv.rs b/crates/executor-core/src/sdk/kv.rs
index 40b0efc..e3f1c7e 100644
--- a/crates/executor-core/src/sdk/kv.rs
+++ b/crates/executor-core/src/sdk/kv.rs
@@ -28,11 +28,10 @@
 
 use std::sync::Arc;
 
-use picloud_shared::{KvError, KvService, SdkCallCx, Services};
+use picloud_shared::{KvService, SdkCallCx, Services};
 use rhai::{Array, Dynamic, Engine as RhaiEngine, EvalAltResult, Map, Module};
-use tokio::runtime::Handle as TokioHandle;
 
-use super::bridge::{dynamic_to_json, json_to_dynamic};
+use super::bridge::{block_on, dynamic_to_json, json_to_dynamic};
 
 /// Per-call handle captured by the Rhai SDK. Cheap to clone (two Arcs
 /// plus an owned string).
@@ -85,7 +84,7 @@ fn register_get(engine: &mut RhaiEngine) {
         "get",
         |handle: &mut KvHandle, key: &str| -> Result<Dynamic, Box<EvalAltResult>> {
             let h = handle.clone();
-            block_on(async move { h.service.get(&h.cx, &h.collection, key).await })
+            block_on("kv", async move { h.service.get(&h.cx, &h.collection, key).await })
                 .map(|opt| opt.map_or(Dynamic::UNIT, json_to_dynamic))
         },
     );
@@ -97,7 +96,7 @@ fn register_set(engine: &mut RhaiEngine) {
         |handle: &mut KvHandle, key: &str, value: Dynamic| -> Result<(), Box<EvalAltResult>> {
             let h = handle.clone();
             let json = dynamic_to_json(&value);
-            block_on(async move { h.service.set(&h.cx, &h.collection, key, json).await })
+            block_on("kv", async move { h.service.set(&h.cx, &h.collection, key, json).await })
         },
     );
 }
@@ -107,7 +106,7 @@ fn register_has(engine: &mut RhaiEngine) {
         "has",
         |handle: &mut KvHandle, key: &str| -> Result<bool, Box<EvalAltResult>> {
             let h = handle.clone();
-            block_on(async move { h.service.has(&h.cx, &h.collection, key).await })
+            block_on("kv", async move { h.service.has(&h.cx, &h.collection, key).await })
         },
     );
 }
@@ -117,7 +116,7 @@ fn register_delete(engine: &mut RhaiEngine) {
         "delete",
         |handle: &mut KvHandle, key: &str| -> Result<bool, Box<EvalAltResult>> {
             let h = handle.clone();
-            block_on(async move { h.service.delete(&h.cx, &h.collection, key).await })
+            block_on("kv", async move { h.service.delete(&h.cx, &h.collection, key).await })
         },
     );
 }
@@ -153,7 +152,7 @@ fn list_call(
     limit: u32,
 ) -> Result<Map, Box<EvalAltResult>> {
     let h = handle.clone();
-    let page = block_on(async move {
+    let page = block_on("kv", async move {
         h.service
             .list(&h.cx, &h.collection, cursor.as_deref(), limit)
             .await
@@ -168,26 +167,3 @@ fn list_call(
     Ok(m)
 }
 
-/// Run an async future inside the synchronous Rhai context.
-///
-/// `LocalExecutorClient` wraps script execution in `spawn_blocking`, so
-/// the current Tokio runtime is reachable via `Handle::current()`. We
-/// block on it directly; we are NOT calling this from an async task,
-/// so blocking is the correct primitive (`block_in_place` would also
-/// work, but we're already on a blocking worker).
-fn block_on<F, T>(fut: F) -> Result<T, Box<EvalAltResult>>
-where
-    F: std::future::Future<Output = Result<T, KvError>> + Send,
-    T: Send,
-{
-    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(
-            format!("kv: no tokio runtime available: {e}").into(),
-            rhai::Position::NONE,
-        )
-        .into()
-    })?;
-    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(format!("kv: {err}").into(), rhai::Position::NONE).into()
-    })
-}
diff --git a/crates/executor-core/src/sdk/pubsub.rs b/crates/executor-core/src/sdk/pubsub.rs
index fc35387..f3b6a12 100644
--- a/crates/executor-core/src/sdk/pubsub.rs
+++ b/crates/executor-core/src/sdk/pubsub.rs
@@ -19,11 +19,13 @@ use std::sync::Arc;
 
 use base64::engine::general_purpose::STANDARD;
 use base64::Engine as _;
-use picloud_shared::{PubsubError, SdkCallCx, Services};
+use picloud_shared::{SdkCallCx, Services};
 use rhai::{Array, Dynamic, Engine as RhaiEngine, EvalAltResult, Map, Module};
 use serde_json::Value as Json;
 use tokio::runtime::Handle as TokioHandle;
 
+use super::bridge::block_on;
+
 pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<SdkCallCx>) {
     let svc = services.pubsub.clone();
     let mut module = Module::new();
@@ -36,7 +38,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
                 let json = message_to_json(&message);
                 let svc = svc.clone();
                 let cx = cx.clone();
-                block_on(async move { svc.publish_durable(&cx, topic, json).await })
+                block_on("pubsub", async move { svc.publish_durable(&cx, topic, json).await })
             },
         );
     }
@@ -157,20 +159,3 @@ fn message_to_json(value: &Dynamic) -> Json {
     Json::String(value.to_string())
 }
 
-/// Run an async future inside the synchronous Rhai context. Mirrors
-/// `kv::block_on`.
-fn block_on<F>(fut: F) -> Result<(), Box<EvalAltResult>>
-where
-    F: std::future::Future<Output = Result<(), PubsubError>> + Send,
-{
-    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(
-            format!("pubsub: no tokio runtime available: {e}").into(),
-            rhai::Position::NONE,
-        )
-        .into()
-    })?;
-    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(format!("pubsub: {err}").into(), rhai::Position::NONE).into()
-    })
-}
diff --git a/crates/executor-core/src/sdk/secrets.rs b/crates/executor-core/src/sdk/secrets.rs
index 9529c7b..a467601 100644
--- a/crates/executor-core/src/sdk/secrets.rs
+++ b/crates/executor-core/src/sdk/secrets.rs
@@ -18,11 +18,10 @@
 
 use std::sync::Arc;
 
-use picloud_shared::{SdkCallCx, SecretsError, SecretsListPage, Services};
+use picloud_shared::{SdkCallCx, SecretsListPage, Services};
 use rhai::{Array, Dynamic, Engine as RhaiEngine, EvalAltResult, Map, Module};
-use tokio::runtime::Handle as TokioHandle;
 
-use super::bridge::{dynamic_to_json, json_to_dynamic};
+use super::bridge::{block_on, dynamic_to_json, json_to_dynamic};
 
 pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<SdkCallCx>) {
     let svc = services.secrets.clone();
@@ -38,7 +37,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
                 let json = dynamic_to_json(&value);
                 let svc = svc.clone();
                 let cx = cx.clone();
-                block_on(async move { svc.set(&cx, name, json).await })
+                block_on("secrets", async move { svc.set(&cx, name, json).await })
             },
         );
     }
@@ -52,7 +51,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
             move |name: &str| -> Result<Dynamic, Box<EvalAltResult>> {
                 let svc = svc.clone();
                 let cx = cx.clone();
-                let opt = block_on(async move { svc.get(&cx, name).await })?;
+                let opt = block_on("secrets", async move { svc.get(&cx, name).await })?;
                 Ok(opt.map_or(Dynamic::UNIT, json_to_dynamic))
             },
         );
@@ -67,7 +66,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
             move |name: &str| -> Result<bool, Box<EvalAltResult>> {
                 let svc = svc.clone();
                 let cx = cx.clone();
-                block_on(async move { svc.delete(&cx, name).await })
+                block_on("secrets", async move { svc.delete(&cx, name).await })
             },
         );
     }
@@ -83,7 +82,7 @@ pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<Sdk
                 let svc = svc.clone();
                 let cx = cx.clone();
                 let page: SecretsListPage =
-                    block_on(async move { svc.list(&cx, cursor.as_deref(), limit).await })?;
+                    block_on("secrets", async move { svc.list(&cx, cursor.as_deref(), limit).await })?;
                 Ok(list_page_to_map(page))
             },
         );
@@ -132,22 +131,3 @@ fn runtime_err(msg: &str) -> Box<EvalAltResult> {
     EvalAltResult::ErrorRuntime(msg.into(), rhai::Position::NONE).into()
 }
 
-/// Run a `SecretsService` future inside the synchronous Rhai context,
-/// mapping any `SecretsError` to a Rhai runtime error. Mirrors
-/// `kv::block_on` / `pubsub::block_on`.
-fn block_on<T, F>(fut: F) -> Result<T, Box<EvalAltResult>>
-where
-    F: std::future::Future<Output = Result<T, SecretsError>> + Send,
-    T: Send,
-{
-    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(
-            format!("secrets: no tokio runtime available: {e}").into(),
-            rhai::Position::NONE,
-        )
-        .into()
-    })?;
-    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(format!("secrets: {err}").into(), rhai::Position::NONE).into()
-    })
-}
diff --git a/crates/executor-core/src/sdk/users.rs b/crates/executor-core/src/sdk/users.rs
index 7b4294b..708bf63 100644
--- a/crates/executor-core/src/sdk/users.rs
+++ b/crates/executor-core/src/sdk/users.rs
@@ -44,11 +44,10 @@ use std::sync::Arc;
 
 use picloud_shared::{
     AppUser, AppUserId, CreateUserInput, EmailTemplateOpts, GeneratedAccept, GeneratedSession,
-    InviteOpts, SdkCallCx, Services, UpdateUserInput, UsersError, UsersListOpts, UsersListPage,
-    UsersService,
+    InviteOpts, SdkCallCx, Services, UpdateUserInput, UsersListOpts, UsersListPage, UsersService,
 };
 use rhai::{Array, Dynamic, Engine as RhaiEngine, EvalAltResult, Map, Module};
-use tokio::runtime::Handle as TokioHandle;
+use super::bridge::block_on;
 
 pub(super) fn register(engine: &mut RhaiEngine, services: &Services, cx: Arc<SdkCallCx>) {
     let svc = services.users.clone();
@@ -91,7 +90,7 @@ fn bind_create(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCal
             let display_name = optional_string(&opts, "display_name");
             let svc = svc.clone();
             let cx = cx.clone();
-            let user = block_on(async move {
+            let user = block_on("users", async move {
                 svc.create(
                     &cx,
                     CreateUserInput {
@@ -116,7 +115,7 @@ fn bind_get(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCallCx
             let id = parse_user_id(id, "users::get")?;
             let svc = svc.clone();
             let cx = cx.clone();
-            let user_opt = block_on(async move { svc.get(&cx, id).await })?;
+            let user_opt = block_on("users", async move { svc.get(&cx, id).await })?;
             Ok(user_opt.map_or(Dynamic::UNIT, |u| Dynamic::from(user_to_map(&u))))
         },
     );
@@ -131,7 +130,7 @@ fn bind_find_by_email(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc
             let email = email.to_string();
             let svc = svc.clone();
             let cx = cx.clone();
-            let user_opt = block_on(async move { svc.find_by_email(&cx, &email).await })?;
+            let user_opt = block_on("users", async move { svc.find_by_email(&cx, &email).await })?;
             Ok(user_opt.map_or(Dynamic::UNIT, |u| Dynamic::from(user_to_map(&u))))
         },
     );
@@ -154,7 +153,7 @@ fn bind_update(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCal
             let patch = UpdateUserInput { display_name };
             let svc = svc.clone();
             let cx = cx.clone();
-            let user = block_on(async move { svc.update(&cx, id, patch).await })?;
+            let user = block_on("users", async move { svc.update(&cx, id, patch).await })?;
             Ok(user_to_map(&user))
         },
     );
@@ -169,7 +168,7 @@ fn bind_delete(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCal
             let id = parse_user_id(id, "users::delete")?;
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.delete(&cx, id).await })
+            block_on("users", async move { svc.delete(&cx, id).await })
         },
     );
 }
@@ -200,7 +199,7 @@ fn bind_list(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCallC
             let svc = svc.clone();
             let cx = cx.clone();
             let page: UsersListPage =
-                block_on(async move { svc.list(&cx, UsersListOpts { cursor, limit }).await })?;
+                block_on("users", async move { svc.list(&cx, UsersListOpts { cursor, limit }).await })?;
             Ok(list_page_to_map(&page))
         },
     );
@@ -221,7 +220,7 @@ fn bind_login(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCall
             let svc = svc.clone();
             let cx = cx.clone();
             let session_opt: Option<GeneratedSession> =
-                block_on(async move { svc.login(&cx, &email, &password).await })?;
+                block_on("users", async move { svc.login(&cx, &email, &password).await })?;
             Ok(session_opt.map_or(Dynamic::UNIT, |s| Dynamic::from(s.token)))
         },
     );
@@ -236,7 +235,7 @@ fn bind_verify(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCal
             let token = token.to_string();
             let svc = svc.clone();
             let cx = cx.clone();
-            let user_opt = block_on(async move { svc.verify(&cx, &token).await })?;
+            let user_opt = block_on("users", async move { svc.verify(&cx, &token).await })?;
             Ok(user_opt.map_or(Dynamic::UNIT, |u| Dynamic::from(user_to_map(&u))))
         },
     );
@@ -251,7 +250,7 @@ fn bind_logout(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCal
             let token = token.to_string();
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.logout(&cx, &token).await })
+            block_on("users", async move { svc.logout(&cx, &token).await })
         },
     );
 }
@@ -274,7 +273,7 @@ fn bind_send_verification_email(
             let opts = parse_email_template(&opts, "users::send_verification_email")?;
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.send_verification_email(&cx, id, opts).await })
+            block_on("users", async move { svc.send_verification_email(&cx, id, opts).await })
         },
     );
 }
@@ -288,7 +287,7 @@ fn bind_verify_email(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<
             let token = token.to_string();
             let svc = svc.clone();
             let cx = cx.clone();
-            let user_opt = block_on(async move { svc.verify_email(&cx, &token).await })?;
+            let user_opt = block_on("users", async move { svc.verify_email(&cx, &token).await })?;
             Ok(user_opt.map_or(Dynamic::UNIT, |u| Dynamic::from(user_to_map(&u))))
         },
     );
@@ -308,7 +307,7 @@ fn bind_request_password_reset(
             let opts = parse_email_template(&opts, "users::request_password_reset")?;
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.request_password_reset(&cx, &email, opts).await })
+            block_on("users", async move { svc.request_password_reset(&cx, &email, opts).await })
         },
     );
 }
@@ -327,7 +326,7 @@ fn bind_complete_password_reset(
             let new_password = new_password.to_string();
             let svc = svc.clone();
             let cx = cx.clone();
-            let user_opt = block_on(async move {
+            let user_opt = block_on("users", async move {
                 svc.complete_password_reset(&cx, &token, &new_password)
                     .await
             })?;
@@ -346,7 +345,7 @@ fn bind_invite(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkCal
             let opts = parse_invite_opts(&opts)?;
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.invite(&cx, &email, opts).await })
+            block_on("users", async move { svc.invite(&cx, &email, opts).await })
         },
     );
 }
@@ -367,7 +366,7 @@ fn bind_accept_invite(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc
                 let svc = svc.clone();
                 let cx = cx.clone();
                 let accept_opt: Option<GeneratedAccept> =
-                    block_on(async move { svc.accept_invite(&cx, &token, &password, None).await })?;
+                    block_on("users", async move { svc.accept_invite(&cx, &token, &password, None).await })?;
                 Ok(accept_opt.map_or(Dynamic::UNIT, |a| Dynamic::from(a.session.token)))
             },
         );
@@ -390,7 +389,7 @@ fn bind_accept_invite(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc
                 };
                 let svc = svc.clone();
                 let cx = cx.clone();
-                let accept_opt: Option<GeneratedAccept> = block_on(async move {
+                let accept_opt: Option<GeneratedAccept> = block_on("users", async move {
                     svc.accept_invite(&cx, &token, &password, display_name)
                         .await
                 })?;
@@ -414,7 +413,7 @@ fn bind_add_role(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkC
             let role = role.to_string();
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.add_role(&cx, id, &role).await })
+            block_on("users", async move { svc.add_role(&cx, id, &role).await })
         },
     );
 }
@@ -429,7 +428,7 @@ fn bind_remove_role(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<S
             let role = role.to_string();
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.remove_role(&cx, id, &role).await })
+            block_on("users", async move { svc.remove_role(&cx, id, &role).await })
         },
     );
 }
@@ -444,7 +443,7 @@ fn bind_has_role(module: &mut Module, svc: &Arc<dyn UsersService>, cx: &Arc<SdkC
             let role = role.to_string();
             let svc = svc.clone();
             let cx = cx.clone();
-            block_on(async move { svc.has_role(&cx, id, &role).await })
+            block_on("users", async move { svc.has_role(&cx, id, &role).await })
         },
     );
 }
@@ -588,21 +587,3 @@ fn runtime_err(msg: &str) -> Box<EvalAltResult> {
     EvalAltResult::ErrorRuntime(msg.into(), rhai::Position::NONE).into()
 }
 
-/// Run a `UsersService` future inside the synchronous Rhai context.
-/// Mirrors `kv::block_on` / `email::block_on`.
-fn block_on<T, F>(fut: F) -> Result<T, Box<EvalAltResult>>
-where
-    F: std::future::Future<Output = Result<T, UsersError>> + Send,
-    T: Send,
-{
-    let handle = TokioHandle::try_current().map_err(|e| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(
-            format!("users: no tokio runtime available: {e}").into(),
-            rhai::Position::NONE,
-        )
-        .into()
-    })?;
-    handle.block_on(fut).map_err(|err| -> Box<EvalAltResult> {
-        EvalAltResult::ErrorRuntime(format!("users: {err}").into(), rhai::Position::NONE).into()
-    })
-}