feat: remote compaction (#6795)

Co-authored-by: pakrym-oai <pakrym@openai.com>

codex-rs/core/tests/common/responses.rs

@@ -499,6 +499,14 @@ fn base_mock() -> (MockBuilder, ResponseMock) {
     (mock, response_mock)
 }
 
+fn compact_mock() -> (MockBuilder, ResponseMock) {
+    let response_mock = ResponseMock::new();
+    let mock = Mock::given(method("POST"))
+        .and(path_regex(".*/responses/compact$"))
+        .and(response_mock.clone());
+    (mock, response_mock)
+}
+
 pub async fn mount_sse_once_match<M>(server: &MockServer, matcher: M, body: String) -> ResponseMock
 where
     M: wiremock::Match + Send + Sync + 'static,
@@ -521,6 +529,40 @@ pub async fn mount_sse_once(server: &MockServer, body: String) -> ResponseMock {
     response_mock
 }
 
+pub async fn mount_compact_json_once_match<M>(
+    server: &MockServer,
+    matcher: M,
+    body: serde_json::Value,
+) -> ResponseMock
+where
+    M: wiremock::Match + Send + Sync + 'static,
+{
+    let (mock, response_mock) = compact_mock();
+    mock.and(matcher)
+        .respond_with(
+            ResponseTemplate::new(200)
+                .insert_header("content-type", "application/json")
+                .set_body_json(body.clone()),
+        )
+        .up_to_n_times(1)
+        .mount(server)
+        .await;
+    response_mock
+}
+
+pub async fn mount_compact_json_once(server: &MockServer, body: serde_json::Value) -> ResponseMock {
+    let (mock, response_mock) = compact_mock();
+    mock.respond_with(
+        ResponseTemplate::new(200)
+            .insert_header("content-type", "application/json")
+            .set_body_json(body.clone()),
+    )
+    .up_to_n_times(1)
+    .mount(server)
+    .await;
+    response_mock
+}
+
 pub async fn start_mock_server() -> MockServer {
     MockServer::builder()
         .body_print_limit(BodyPrintLimit::Limited(80_000))

codex-rs/core/tests/common/test_codex.rs

@@ -49,6 +49,7 @@ pub enum ShellModelOutput {
 
 pub struct TestCodexBuilder {
     config_mutators: Vec<Box<ConfigMutator>>,
+    auth: CodexAuth,
 }
 
 impl TestCodexBuilder {
@@ -60,6 +61,11 @@ impl TestCodexBuilder {
         self
     }
 
+    pub fn with_auth(mut self, auth: CodexAuth) -> Self {
+        self.auth = auth;
+        self
+    }
+
     pub fn with_model(self, model: &str) -> Self {
         let new_model = model.to_string();
         self.with_config(move |config| {
@@ -90,13 +96,12 @@ impl TestCodexBuilder {
     ) -> anyhow::Result<TestCodex> {
         let (config, cwd) = self.prepare_config(server, &home).await?;
 
-        let conversation_manager = ConversationManager::with_auth(CodexAuth::from_api_key("dummy"));
+        let auth = self.auth.clone();
+        let conversation_manager = ConversationManager::with_auth(auth.clone());
 
         let new_conversation = match resume_from {
             Some(path) => {
-                let auth_manager = codex_core::AuthManager::from_auth_for_testing(
-                    CodexAuth::from_api_key("dummy"),
-                );
+                let auth_manager = codex_core::AuthManager::from_auth_for_testing(auth);
                 conversation_manager
                     .resume_conversation_from_rollout(config.clone(), path, auth_manager)
                     .await?
@@ -345,5 +350,6 @@ fn function_call_output<'a>(bodies: &'a [Value], call_id: &str) -> &'a Value {
 pub fn test_codex() -> TestCodexBuilder {
     TestCodexBuilder {
         config_mutators: vec![],
+        auth: CodexAuth::from_api_key("dummy"),
     }
 }