runtime: preserve typed workdir errors

crates/workspace-server/src/hosts.rs

@@ -2144,7 +2144,7 @@ impl WorkspaceWorkerRuntime for RemoteWorkerRuntime {
                 worker: Some(self.map_worker_detail(response.worker)),
                 diagnostics: Vec::new(),
             },
-            Err(diagnostic) if diagnostic.code == "remote_worker_not_found" => WorkerLookupResult {
+            Err(diagnostic) if diagnostic.code == "worker_not_found" => WorkerLookupResult {
                 worker: None,
                 diagnostics: Vec::new(),
             },
@@ -2860,6 +2860,11 @@ fn embedded_runtime_diagnostic(error: &EmbeddedRuntimeError) -> RuntimeDiagnosti
             DiagnosticSeverity::Warning,
             error.to_string(),
         ),
+        EmbeddedRuntimeError::WorkingDirectory(workdir_diagnostic) => diagnostic(
+            workdir_diagnostic.code.clone(),
+            DiagnosticSeverity::Warning,
+            workdir_diagnostic.message.clone(),
+        ),
         EmbeddedRuntimeError::InvalidRequest(_)
         | EmbeddedRuntimeError::ConfigBundleMissing { .. }
         | EmbeddedRuntimeError::ConfigBundleDigestMismatch { .. }
@@ -2989,7 +2994,8 @@ fn remote_http_status_diagnostic(
         StatusCode::UNAUTHORIZED | StatusCode::FORBIDDEN => {
             ("remote_runtime_auth_failed", DiagnosticSeverity::Error)
         }
-        StatusCode::NOT_FOUND => ("remote_worker_not_found", DiagnosticSeverity::Warning),
+        _ if error.is_some() => (remote_code, DiagnosticSeverity::Warning),
+        StatusCode::NOT_FOUND => ("remote_runtime_not_found", DiagnosticSeverity::Warning),
         StatusCode::METHOD_NOT_ALLOWED | StatusCode::NOT_IMPLEMENTED => {
             ("remote_runtime_unsupported", DiagnosticSeverity::Warning)
         }

crates/workspace-server/src/server.rs

@@ -4290,7 +4290,7 @@ fn sync_runtime_workdir_observations(
 fn workdir_status_from_runtime_miss(diagnostics: &[RuntimeDiagnostic]) -> &'static str {
     if diagnostics
         .iter()
-        .any(|diagnostic| diagnostic.code.contains("not_found"))
+        .any(|diagnostic| diagnostic.code == "working_directory_not_found")
     {
         "not_found"
     } else {
@@ -5211,6 +5211,26 @@ mod tests {
         );
     }
 
+    #[test]
+    fn workdir_runtime_miss_uses_exact_typed_code() {
+        assert_eq!(
+            workdir_status_from_runtime_miss(&[RuntimeDiagnostic {
+                code: "working_directory_not_found".to_string(),
+                severity: DiagnosticSeverity::Warning,
+                message: "missing".to_string(),
+            }]),
+            "not_found"
+        );
+        assert_eq!(
+            workdir_status_from_runtime_miss(&[RuntimeDiagnostic {
+                code: "some_other_not_found".to_string(),
+                severity: DiagnosticSeverity::Warning,
+                message: "not a typed workdir miss".to_string(),
+            }]),
+            "unknown"
+        );
+    }
+
     #[tokio::test]
     async fn profile_settings_api_returns_typed_diagnostics_for_duplicate_selector() {
         let dir = tempfile::tempdir().unwrap();