diff --git a/Cargo.lock b/Cargo.lock
index a70d7cd..e12df22 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -22,6 +22,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "atomic-waker"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
+
 [[package]]
 name = "axum"
 version = "0.7.9"
@@ -35,6 +41,7 @@ dependencies = [
  "http",
  "http-body",
  "http-body-util",
+ "hyper",
  "hyper-util",
  "itoa",
  "matchit",
@@ -45,11 +52,15 @@ dependencies = [
  "pin-project-lite",
  "rustversion",
  "serde",
+ "serde_json",
+ "serde_path_to_error",
+ "serde_urlencoded",
  "sync_wrapper",
  "tokio",
  "tower",
  "tower-layer",
  "tower-service",
+ "tracing",
 ]
 
 [[package]]
@@ -70,6 +81,7 @@ dependencies = [
  "sync_wrapper",
  "tower-layer",
  "tower-service",
+ "tracing",
 ]
 
 [[package]]
@@ -136,12 +148,41 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "form_urlencoded"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb4cb245038516f5f85277875cdaa4f7d2c9a0fa0468de06ed190163b1581fcf"
+dependencies = [
+ "percent-encoding",
+]
+
+[[package]]
+name = "futures-channel"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07bbe89c50d7a535e539b8c17bc0b49bdb77747034daa8087407d655f3f7cc1d"
+dependencies = [
+ "futures-core",
+]
+
 [[package]]
 name = "futures-core"
 version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7e3450815272ef58cec6d564423f6e755e25379b217b0bc688e295ba24df6b1d"
 
+[[package]]
+name = "futures-macro"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e835b70203e41293343137df5c0664546da5745f82ec9b84d40be8336958447b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "futures-task"
 version = "0.3.32"
@@ -155,6 +196,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "389ca41296e6190b48053de0321d02a77f32f8a5d2461dd38762c0593805c6d6"
 dependencies = [
  "futures-core",
+ "futures-macro",
  "futures-task",
  "pin-project-lite",
  "slab",
@@ -235,10 +277,15 @@ version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6299f016b246a94207e63da54dbe807655bf9e00044f73ded42c3ac5305fbcca"
 dependencies = [
+ "atomic-waker",
  "bytes",
+ "futures-channel",
+ "futures-core",
  "http",
  "http-body",
+ "httparse",
  "httpdate",
+ "itoa",
  "pin-project-lite",
  "smallvec",
  "tokio",
@@ -281,6 +328,12 @@ version = "0.2.186"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
 
+[[package]]
+name = "log"
+version = "0.4.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+
 [[package]]
 name = "matchit"
 version = "0.7.3"
@@ -327,6 +380,12 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "once_cell"
+version = "1.21.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.2"
@@ -404,6 +463,12 @@ version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
 
+[[package]]
+name = "ryu"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9774ba4a74de5f7b1c1451ed6cd5285a32eddb5cccb8cc655a4e50009e06477f"
+
 [[package]]
 name = "serde"
 version = "1.0.228"
@@ -448,6 +513,29 @@ dependencies = [
  "zmij",
 ]
 
+[[package]]
+name = "serde_path_to_error"
+version = "0.1.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10a9ff822e371bb5403e391ecd83e182e0e77ba7f6fe0160b795797109d1b457"
+dependencies = [
+ "itoa",
+ "serde",
+ "serde_core",
+]
+
+[[package]]
+name = "serde_urlencoded"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
+dependencies = [
+ "form_urlencoded",
+ "itoa",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -518,9 +606,13 @@ dependencies = [
 name = "slhx-v0-examples"
 version = "0.1.0"
 dependencies = [
+ "axum",
+ "futures-util",
  "slhx",
+ "slhx-axum",
  "slhx-build",
  "slhx-test",
+ "tokio",
 ]
 
 [[package]]
@@ -626,6 +718,7 @@ dependencies = [
  "tokio",
  "tower-layer",
  "tower-service",
+ "tracing",
 ]
 
 [[package]]
@@ -640,6 +733,26 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3"
 
+[[package]]
+name = "tracing"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100"
+dependencies = [
+ "log",
+ "pin-project-lite",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a"
+dependencies = [
+ "once_cell",
+]
+
 [[package]]
 name = "tree-sitter"
 version = "0.25.10"
diff --git a/examples/v0/Cargo.toml b/examples/v0/Cargo.toml
index e4ed439..53716c6 100644
--- a/examples/v0/Cargo.toml
+++ b/examples/v0/Cargo.toml
@@ -8,7 +8,11 @@ publish = false
 path = "src/lib.rs"
 
 [dependencies]
+axum = "0.7"
+futures-util = "0.3"
 slhx = { path = "../../slhx" }
+slhx-axum = { path = "../../slhx-axum" }
+tokio = { version = "1", features = ["macros", "net", "rt-multi-thread", "time"] }
 
 [dev-dependencies]
 slhx-test = { path = "../../slhx-test" }
diff --git a/examples/v0/README.md b/examples/v0/README.md
new file mode 100644
index 0000000..eccdac6
--- /dev/null
+++ b/examples/v0/README.md
@@ -0,0 +1,18 @@
+# slhx v0 browser examples
+
+Run the examples server:
+
+```sh
+cargo run -p slhx-v0-examples
+```
+
+Open <http://127.0.0.1:3000>.
+
+The page includes working examples for:
+
+- counter updates
+- todo form submission
+- wizard step updates
+- login form feedback
+- page swap/navigation
+- server-sent notifications
diff --git a/examples/v0/src/main.rs b/examples/v0/src/main.rs
new file mode 100644
index 0000000..5f3f410
--- /dev/null
+++ b/examples/v0/src/main.rs
@@ -0,0 +1,210 @@
+use axum::extract::{Query, State};
+use axum::response::IntoResponse;
+use axum::routing::get;
+use axum::Router;
+use futures_util::{stream, StreamExt};
+use slhx::{push, IntoEffect, SafeHtml};
+use slhx_axum::{runtime_js, sse, EffectResponse, HandlerRegistry, InteractionForm, PageRequest};
+use slhx_v0_examples::ui;
+use std::collections::BTreeMap;
+use std::convert::Infallible;
+use std::net::SocketAddr;
+use std::sync::{Arc, Mutex};
+use std::time::Duration;
+
+#[derive(Default)]
+struct ExampleState {
+    counter: Mutex<u64>,
+    todos: Mutex<Vec<Todo>>,
+    wizard_step: Mutex<u8>,
+}
+
+#[derive(Clone)]
+struct Todo {
+    id: u64,
+    title: String,
+}
+
+#[tokio::main]
+async fn main() {
+    let state = Arc::new(ExampleState::default());
+    let app = Router::new()
+        .route("/", get(home).post(interact))
+        .route("/docs", get(docs).post(interact))
+        .route("/events", get(events))
+        .route("/slhx.js", get(runtime))
+        .with_state(state);
+
+    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
+    let listener = tokio::net::TcpListener::bind(addr).await.unwrap();
+    println!("slhx v0 examples: http://{addr}");
+    axum::serve(listener, app).await.unwrap();
+}
+
+// req: examples/001
+async fn home(request: PageRequest) -> impl IntoResponse {
+    request
+        .page(all_examples(), shell)
+        .title("slhx v0 examples")
+        .fingerprint(ui::BUILD_FINGERPRINT)
+}
+
+// req: page_swap/002, req: examples/001
+async fn docs(request: PageRequest) -> impl IntoResponse {
+    let partial = ui::page_swap::lower_html(
+        r#"<main data-slhx-root="docs">
+  <nav data-slhx-slot="nav">
+    <a href="/" data-slhx-nav="">Examples</a>
+    <a href="/docs" data-slhx-nav="">Docs</a>
+  </nav>
+  <article data-slhx-slot="content"><h1>Docs</h1><p>This page was swapped without a full reload.</p></article>
+  <title data-slhx-slot="title">Docs</title>
+</main>"#,
+    );
+    request
+        .page(partial, shell)
+        .title("Docs")
+        .fingerprint(ui::BUILD_FINGERPRINT)
+}
+
+async fn interact(
+    State(state): State<Arc<ExampleState>>,
+    form: InteractionForm,
+) -> Result<EffectResponse, impl IntoResponse> {
+    registry(state).dispatch(form)
+}
+
+async fn runtime() -> impl IntoResponse {
+    runtime_js()
+}
+
+// req: push/001, req: push/003, req: examples/001
+async fn events(Query(params): Query<BTreeMap<String, String>>) -> impl IntoResponse {
+    if params.contains_key("once") {
+        let effect = ui::notifications::slots::notifications.text("Server event #1");
+        return sse(stream::iter([Ok::<_, Infallible>(effect.into_batch(ui::BUILD_FINGERPRINT))]).boxed());
+    }
+
+    let batches = stream::unfold(1_u64, |count| async move {
+        tokio::time::sleep(Duration::from_secs(3)).await;
+        let effect = ui::notifications::slots::notifications.text(format!("Server event #{count}"));
+        Some((Ok::<_, Infallible>(effect.into_batch(ui::BUILD_FINGERPRINT)), count + 1))
+    })
+    .boxed();
+    sse(batches)
+}
+
+fn registry(state: Arc<ExampleState>) -> HandlerRegistry {
+    HandlerRegistry::new(ui::BUILD_FINGERPRINT)
+        .register(ui::counter::handles::increment.id().id, {
+            let state = state.clone();
+            move |_| {
+                // req: examples/001
+                let mut counter = state.counter.lock().unwrap();
+                *counter += 1;
+                ui::counter::slots::counter_value.text(*counter)
+            }
+        })
+        .register(ui::todos::handles::add_todo.id().id, {
+            let state = state.clone();
+            move |form| {
+                // req: examples/001
+                let title = form.value("title").unwrap_or("").trim();
+                let mut todos = state.todos.lock().unwrap();
+                if !title.is_empty() {
+                    let id = todos.last().map_or(1, |todo| todo.id + 1);
+                    todos.push(Todo { id, title: title.into() });
+                }
+                (
+                    ui::todos::slots::todo_list.html(SafeHtml::trusted(render_todos(&todos))),
+                    ui::todos::forms::new_todo.clear("title"),
+                )
+            }
+        })
+        .register(ui::wizard::handles::next_step.id().id, {
+            let state = state.clone();
+            move |_| {
+                // req: examples/001
+                let mut step = state.wizard_step.lock().unwrap();
+                *step += 1;
+                ui::wizard::slots::wizard_step.text(format!("Step {}", *step + 1))
+            }
+        })
+        .register(ui::auth::handles::login.id().id, |form| {
+            // req: examples/001
+            let ok = form.value("email") == Some("demo@example.com")
+                && form.value("password").is_some_and(|password| !password.is_empty());
+            ui::auth::slots::login_status.text(if ok {
+                "Signed in as demo@example.com"
+            } else {
+                "Try demo@example.com with any password"
+            })
+        })
+        .register(ui::page_swap::handles::load_docs.id().id, |_| {
+            // req: page_swap/002, req: examples/001
+            (
+                ui::page_swap::slots::content.html(SafeHtml::trusted(
+                    "<h1>Docs</h1><p>This content came from an EffectBatch.</p>",
+                )),
+                ui::page_swap::slots::title.text("Docs"),
+                push("/docs"),
+            )
+        })
+}
+
+fn all_examples() -> String {
+    [
+        ui::counter::lower_html(include_str!("../templates/counter.heml")),
+        ui::todos::lower_html(include_str!("../templates/todos.heml")),
+        ui::wizard::lower_html(include_str!("../templates/wizard.heml")),
+        ui::auth::lower_html(include_str!("../templates/auth.heml")),
+        ui::page_swap::lower_html(include_str!("../templates/page_swap.heml")),
+        ui::notifications::lower_html(include_str!("../templates/notifications.heml")),
+    ]
+    .join("\n")
+}
+
+fn shell(body: String) -> String {
+    format!(
+        r#"<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>slhx v0 examples</title>
+  <script src="/slhx.js" defer></script>
+  <style>
+    body {{ font-family: system-ui, sans-serif; margin: 2rem; max-width: 54rem; }}
+    section, main {{ border: 1px solid #ddd; border-radius: .5rem; margin: 1rem 0; padding: 1rem; }}
+    input, button {{ font: inherit; margin: .25rem; }}
+    nav a {{ margin-right: .75rem; }}
+  </style>
+</head>
+<body>
+  <h1>slhx v0 browser examples</h1>
+  <p>Try the counter, todo form, wizard, login, page swap, and live SSE notifications.</p>
+  {body}
+</body>
+</html>"#
+    )
+}
+
+fn render_todos(todos: &[Todo]) -> String {
+    if todos.is_empty() {
+        return "<li>No todos yet</li>".into();
+    }
+    todos
+        .iter()
+        .map(|todo| format!(r#"<li data-key="{}">{}</li>"#, todo.id, escape_html(&todo.title)))
+        .collect::<Vec<_>>()
+        .join("")
+}
+
+fn escape_html(value: &str) -> String {
+    value
+        .replace('&', "&amp;")
+        .replace('<', "&lt;")
+        .replace('>', "&gt;")
+        .replace('"', "&quot;")
+        .replace('\'', "&#39;")
+}
diff --git a/examples/v0/templates/notifications.heml b/examples/v0/templates/notifications.heml
index c9e0c7e..f2bc5e6 100644
--- a/examples/v0/templates/notifications.heml
+++ b/examples/v0/templates/notifications.heml
@@ -1,4 +1,4 @@
-<section data-slhx-root="notifications">
+<section data-slhx-root="notifications" data-slhx-sse="/events">
   <h2>Notifications</h2>
   <div data-slhx-slot="notifications">No notifications</div>
 </section>