diff --git a/v0.5/Cargo.lock b/v0.5/Cargo.lock
index 62a269a49..85c52f5da 100644
--- a/v0.5/Cargo.lock
+++ b/v0.5/Cargo.lock
@@ -157,6 +157,7 @@ checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 name = "fastn"
 version = "0.1.0"
 dependencies = [
+ "async-trait",
  "fastn-compiler",
  "fastn-continuation",
  "fastn-package",
diff --git a/v0.5/fastn-continuation/src/lib.rs b/v0.5/fastn-continuation/src/lib.rs
index 7fdc5eae9..17078895d 100644
--- a/v0.5/fastn-continuation/src/lib.rs
+++ b/v0.5/fastn-continuation/src/lib.rs
@@ -9,8 +9,8 @@ mod result;
 mod ur;
 
 #[cfg(feature = "async_provider")]
-pub use provider::{AsyncProvider, AsyncProviderWith};
-pub use provider::{Provider, ProviderWith};
+pub use provider::{AsyncMutProvider, AsyncMutProviderWith, AsyncProvider, AsyncProviderWith};
+pub use provider::{MutProvider, MutProviderWith, Provider, ProviderWith};
 pub use result::Result;
 pub use ur::{FromWith, UR};
 
diff --git a/v0.5/fastn-continuation/src/provider.rs b/v0.5/fastn-continuation/src/provider.rs
index 3152d1329..2c19fb0e3 100644
--- a/v0.5/fastn-continuation/src/provider.rs
+++ b/v0.5/fastn-continuation/src/provider.rs
@@ -31,3 +31,37 @@ pub trait ProviderWith {
 
     fn provide(&self, context: &mut Self::Context, needed: Self::Needed) -> Self::Found;
 }
+
+pub trait MutProvider {
+    type Needed;
+    type Found;
+
+    fn provide(&mut self, needed: Self::Needed) -> Self::Found;
+}
+
+#[cfg(feature = "async_provider")]
+#[async_trait::async_trait]
+pub trait AsyncMutProvider {
+    type Needed;
+    type Found;
+
+    async fn provide(&mut self, needed: Self::Needed) -> Self::Found;
+}
+
+#[cfg(feature = "async_provider")]
+#[async_trait::async_trait]
+pub trait AsyncMutProviderWith {
+    type Needed;
+    type Found;
+    type Context;
+
+    async fn provide(&mut self, context: &mut Self::Context, needed: Self::Needed) -> Self::Found;
+}
+
+pub trait MutProviderWith {
+    type Needed;
+    type Found;
+    type Context;
+
+    fn provide(&mut self, context: &mut Self::Context, needed: Self::Needed) -> Self::Found;
+}
diff --git a/v0.5/fastn-continuation/src/result.rs b/v0.5/fastn-continuation/src/result.rs
index d0b80ea73..260007736 100644
--- a/v0.5/fastn-continuation/src/result.rs
+++ b/v0.5/fastn-continuation/src/result.rs
@@ -174,4 +174,84 @@ where
             }
         }
     }
+
+    pub fn mut_consume<P>(mut self, mut p: P) -> C::Output
+    where
+        P: fastn_continuation::MutProvider<Needed = C::Needed, Found = C::Found>,
+    {
+        loop {
+            match self {
+                fastn_continuation::Result::Init(ic) => {
+                    self = ic.continue_after(Default::default());
+                }
+                fastn_continuation::Result::Stuck(ic, needed) => {
+                    self = ic.continue_after(p.provide(needed));
+                }
+                fastn_continuation::Result::Done(c) => {
+                    return c;
+                }
+            }
+        }
+    }
+
+    pub fn mut_consume_with<P>(mut self, mut p: P) -> C::Output
+    where
+        P: fastn_continuation::MutProviderWith<Needed = C::Needed, Found = C::Found, Context = C>,
+    {
+        loop {
+            match self {
+                fastn_continuation::Result::Init(ic) => {
+                    self = ic.continue_after(Default::default());
+                }
+                fastn_continuation::Result::Stuck(mut ic, needed) => {
+                    let o = p.provide(&mut ic, needed);
+                    self = ic.continue_after(o);
+                }
+                fastn_continuation::Result::Done(c) => {
+                    return c;
+                }
+            }
+        }
+    }
+
+    #[cfg(feature = "async_provider")]
+    pub async fn mut_consume_async<P>(mut self, mut p: P) -> C::Output
+    where
+        P: fastn_continuation::AsyncMutProvider<Needed = C::Needed, Found = C::Found>,
+    {
+        loop {
+            match self {
+                fastn_continuation::Result::Init(ic) => {
+                    self = ic.continue_after(Default::default());
+                }
+                fastn_continuation::Result::Stuck(ic, needed) => {
+                    self = ic.continue_after(p.provide(needed).await);
+                }
+                fastn_continuation::Result::Done(c) => {
+                    return c;
+                }
+            }
+        }
+    }
+
+    #[cfg(feature = "async_provider")]
+    pub async fn mut_consume_with_async<P>(mut self, p: P) -> C::Output
+    where
+        P: fastn_continuation::AsyncProviderWith<Needed = C::Needed, Found = C::Found, Context = C>,
+    {
+        loop {
+            match self {
+                fastn_continuation::Result::Init(ic) => {
+                    self = ic.continue_after(Default::default());
+                }
+                fastn_continuation::Result::Stuck(mut ic, needed) => {
+                    let o = p.provide(&mut ic, needed).await;
+                    self = ic.continue_after(o);
+                }
+                fastn_continuation::Result::Done(c) => {
+                    return c;
+                }
+            }
+        }
+    }
 }
diff --git a/v0.5/fastn/Cargo.toml b/v0.5/fastn/Cargo.toml
index 7e057b3f9..87faffe73 100644
--- a/v0.5/fastn/Cargo.toml
+++ b/v0.5/fastn/Cargo.toml
@@ -9,10 +9,11 @@ repository.workspace = true
 homepage.workspace = true
 
 [dependencies]
+async-trait.workspace = true
 fastn-compiler.workspace = true
 fastn-package.workspace = true
 fastn-section.workspace = true
-fastn-continuation.workspace = true
+fastn-continuation = { workspace = true, features = ["async_provider"] }
 fastn-router.workspace = true
 fastn-runtime.workspace = true
 fastn-unresolved.workspace = true
diff --git a/v0.5/fastn/src/commands/render.rs b/v0.5/fastn/src/commands/render.rs
index 08478162a..0861f9671 100644
--- a/v0.5/fastn/src/commands/render.rs
+++ b/v0.5/fastn/src/commands/render.rs
@@ -1,10 +1,6 @@
 impl fastn::commands::Render {
-    pub async fn run(self, _package: &mut fastn_package::Package, _router: fastn_router::Router) {
-        let route = fastn_router::Router::reader().consume(&self).route(
-            "/",
-            fastn_router::Method::Get,
-            &[],
-        );
+    pub async fn run(self, _package: &mut fastn_package::Package, router: fastn_router::Router) {
+        let route = router.route("/", fastn_router::Method::Get, &[]);
         match route {
             fastn_router::Route::Document(path, data) => {
                 let html =
@@ -17,20 +13,12 @@ impl fastn::commands::Render {
     }
 }
 
-impl fastn_continuation::Provider for &fastn::commands::Render {
-    type Needed = Vec<String>;
-    type Found = Vec<(String, Option<fastn_section::Document>)>;
-
-    fn provide(&self, _needed: Self::Needed) -> Self::Found {
-        todo!()
-    }
-}
-
 pub async fn render_document(path: &str, _data: serde_json::Value, _strict: bool) -> String {
     let source = std::fs::File::open(path)
         .and_then(std::io::read_to_string)
         .unwrap();
-    let o = fastn_compiler::compile(&source, "main", None).consume_with_fn(fastn::symbols::lookup);
+    let o = fastn_compiler::compile(&source, "main", None)
+        .consume_with_fn(fastn::definition_provider::lookup);
     let h = fastn_runtime::HtmlData::from_cd(o.unwrap());
     h.to_test_html()
 }
diff --git a/v0.5/fastn/src/symbols.rs b/v0.5/fastn/src/definition_provider.rs
similarity index 100%
rename from v0.5/fastn/src/symbols.rs
rename to v0.5/fastn/src/definition_provider.rs
diff --git a/v0.5/fastn/src/lib.rs b/v0.5/fastn/src/lib.rs
index f1c8d4032..bc53996cd 100644
--- a/v0.5/fastn/src/lib.rs
+++ b/v0.5/fastn/src/lib.rs
@@ -10,7 +10,10 @@ extern crate self as fastn;
 use tokio as _;
 
 pub mod commands;
-mod symbols;
+mod definition_provider;
+mod section_provider;
+
+pub use section_provider::SectionProvider;
 
 pub enum Action {
     Read,
diff --git a/v0.5/fastn/src/main.rs b/v0.5/fastn/src/main.rs
index 73efeafa7..262178ca6 100644
--- a/v0.5/fastn/src/main.rs
+++ b/v0.5/fastn/src/main.rs
@@ -1,9 +1,12 @@
 #[tokio::main]
 async fn main() {
     let command = fastn::commands::parse();
-    let mut package = fastn_package::Package::reader().consume_fn(fastn::full_filler);
+    let section_provider = fastn::SectionProvider::default();
+    let mut package = fastn_package::Package::reader()
+        .mut_consume_async(&section_provider)
+        .await;
     let router = fastn_router::Router::reader()
-        .consume_async_fn(fastn::full_filler_async)
+        .mut_consume_async(&section_provider)
         .await;
     // read config here and pass to everyone?
     // do common build stuff here
diff --git a/v0.5/fastn/src/section_provider.rs b/v0.5/fastn/src/section_provider.rs
new file mode 100644
index 000000000..bf97bfc13
--- /dev/null
+++ b/v0.5/fastn/src/section_provider.rs
@@ -0,0 +1,12 @@
+#[derive(Default)]
+pub struct SectionProvider {}
+
+#[async_trait::async_trait]
+impl fastn_continuation::AsyncMutProvider for &SectionProvider {
+    type Needed = Vec<String>;
+    type Found = Vec<(String, Option<fastn_section::Document>)>;
+
+    async fn provide(&mut self, _needed: Vec<String>) -> Self::Found {
+        todo!()
+    }
+}