diff --git a/crates/op-host-desktop/src/design_session.rs b/crates/op-host-desktop/src/design_session.rs
index 1bcb3b310..5e3981009 100644
--- a/crates/op-host-desktop/src/design_session.rs
+++ b/crates/op-host-desktop/src/design_session.rs
@@ -58,7 +58,7 @@ use op_orchestrator::{
 };
 
 use crate::chat_runtime::shared_runtime;
-use crate::pre_validator::LintPreValidator;
+use op_web_daemon::pre_validator::LintPreValidator;
 
 /// Spawn a worker that runs `Orchestrator::run` against a `RemoteDocSink`.
 pub fn start<L: LlmClient + Send + 'static>(
diff --git a/crates/op-host-desktop/src/main.rs b/crates/op-host-desktop/src/main.rs
index 462962313..b5359e958 100644
--- a/crates/op-host-desktop/src/main.rs
+++ b/crates/op-host-desktop/src/main.rs
@@ -54,7 +54,6 @@ mod menu_action;
 mod model_discovery;
 mod persistence;
 mod persistence_image;
-mod pre_validator;
 mod provider_probe;
 mod provider_probe_host;
 mod provider_probe_models;
diff --git a/crates/op-host-desktop/src/web_chat_standard.rs b/crates/op-host-desktop/src/web_chat_standard.rs
index 176d90666..1e75ea315 100644
--- a/crates/op-host-desktop/src/web_chat_standard.rs
+++ b/crates/op-host-desktop/src/web_chat_standard.rs
@@ -22,7 +22,7 @@ use serde_json::Value;
 
 use crate::ai_proxy::AiStreamRequest;
 use op_web_daemon::chat_provider_llm::ChatProviderLlmClient;
-use crate::pre_validator::LintPreValidator;
+use op_web_daemon::pre_validator::LintPreValidator;
 use crate::web_canvas_server::{SseHub, WebCanvasState};
 
 const STANDARD_MODIFY_STEP: &str =
diff --git a/crates/op-web-daemon/src/lib.rs b/crates/op-web-daemon/src/lib.rs
index 6104f7c29..7dec79b99 100644
--- a/crates/op-web-daemon/src/lib.rs
+++ b/crates/op-web-daemon/src/lib.rs
@@ -19,4 +19,5 @@ pub mod chat_provider_llm;
 pub mod chat_spawn;
 pub mod chat_subprocess_quirks;
 pub mod chat_system_prompt;
+pub mod pre_validator;
 pub mod web_static;
diff --git a/crates/op-host-desktop/src/pre_validator.rs b/crates/op-web-daemon/src/pre_validator.rs
similarity index 100%
rename from crates/op-host-desktop/src/pre_validator.rs
rename to crates/op-web-daemon/src/pre_validator.rs