diff --git a/Makefile b/Makefile
index 55cd1703..ffa5e255 100644
--- a/Makefile
+++ b/Makefile
@@ -209,7 +209,7 @@ audit:
 	cargo deny check
 
 PUBLISH_CRATES := praxis-proxy-tls praxis-proxy-core \
-	praxis-proxy-filter praxis-proxy-protocol praxis-proxy
+	praxis-proxy-filter praxis-proxy-ext-proc praxis-proxy-protocol praxis-proxy
 
 publish-dry-run:
 	@for crate in $(PUBLISH_CRATES); do \
diff --git a/filter/ext-proc/Cargo.toml b/filter/ext-proc/Cargo.toml
index d607c8e9..fd7779d3 100644
--- a/filter/ext-proc/Cargo.toml
+++ b/filter/ext-proc/Cargo.toml
@@ -8,7 +8,7 @@ description = "Envoy-compatible ext_proc filter for Praxis"
 license = "MIT AND Apache-2.0 AND BSD-3-Clause"
 repository.workspace = true
 readme = "../../README.md"
-publish = false
+publish = true
 
 [lib]
 name = "praxis_ext_proc"
diff --git a/filter/ext-proc/src/lib.rs b/filter/ext-proc/src/lib.rs
index 8d4460ab..5e4ba164 100644
--- a/filter/ext-proc/src/lib.rs
+++ b/filter/ext-proc/src/lib.rs
@@ -43,12 +43,15 @@
 //! use praxis_filter::FilterRegistry;
 //!
 //! let mut registry = FilterRegistry::with_builtins();
-//! registry.register(
-//!     "ext_proc",
-//!     praxis_filter::http_builtin(praxis_ext_proc::ExtProcFilter::from_config),
-//! ).unwrap();
+//! praxis_ext_proc::register_filters(&mut registry);
 //! ```
 //!
+//! # Protocol Types
+//!
+//! Generated Envoy protobuf and gRPC types are exposed under [`proto`]
+//! so downstream tests and external processor implementations can use
+//! the same vendored protocol definitions as the filter.
+//!
 //! [`HttpFilter`]: praxis_filter::HttpFilter
 //! [`FilterRegistry::with_builtins`]: praxis_filter::FilterRegistry::with_builtins
 //! [`ext_proc`]: https://www.envoyproxy.io/docs/envoy/latest/api-v3/service/ext_proc/v3/external_processor.proto
@@ -59,7 +62,7 @@
 mod callout;
 pub(crate) mod duplex;
 mod mutations;
-pub(crate) mod proto;
+pub mod proto;
 use std::time::Duration;
 
 use async_trait::async_trait;
@@ -1161,5 +1164,9 @@ impl HttpFilter for ExtProcFilter {
     }
 }
 
+praxis_filter::export_filters! {
+    http "ext_proc" => ExtProcFilter::from_config,
+}
+
 #[cfg(test)]
 mod tests;
diff --git a/filter/ext-proc/src/proto.rs b/filter/ext-proc/src/proto.rs
index a19c4063..0800136c 100644
--- a/filter/ext-proc/src/proto.rs
+++ b/filter/ext-proc/src/proto.rs
@@ -8,14 +8,17 @@
 //!
 //! Compiled from vendored `.proto` files at build time.
 
+/// Envoy API protobuf modules.
 #[allow(
     clippy::allow_attributes,
     clippy::missing_docs_in_private_items,
     reason = "generated protobuf module tree"
 )]
-pub(crate) mod envoy {
-    pub(crate) mod service {
-        pub(crate) mod common {
+pub mod envoy {
+    /// Envoy service protobuf modules.
+    pub mod service {
+        /// Shared Envoy service protobuf types.
+        pub mod common {
             #[allow(
                 dead_code,
                 missing_docs,
@@ -41,7 +44,8 @@ pub(crate) mod envoy {
             }
         }
 
-        pub(crate) mod ext_proc {
+        /// Envoy external processing protobuf types and gRPC service.
+        pub mod ext_proc {
             #[allow(
                 dead_code,
                 missing_docs,
@@ -57,6 +61,7 @@ pub(crate) mod envoy {
                 clippy::doc_markdown,
                 clippy::enum_variant_names,
                 clippy::missing_docs_in_private_items,
+                clippy::missing_errors_doc,
                 clippy::needless_borrows_for_generic_args,
                 clippy::too_many_lines,
                 clippy::trivially_copy_pass_by_ref,