Remove the unused legacy remote compaction implementation (#44273)

## Why

Remote compaction already uses the normal Responses API, leaving the legacy `/responses/compact` runner unused.

## What changed

- Remove the legacy runner, endpoint client, request types, analytics variant, and obsolete test helpers and snapshots.
- Move tool-output trimming and its metadata tests into `compact_remote_history` for reuse by remote compaction v2.
- Consolidate retained-history filtering in the v2 implementation and remove redundant `RemoteCompactionV2` settings from tests.

## Testing

Extend the retained-history unit test to explicitly check that hook prompts survive compaction.

GitOrigin-RevId: 999bb1391aa22c3c281d6a96f98817d6c9e46ed9

codex-rs/core/tests/suite/client.rs

@@ -637,9 +637,6 @@ async fn response_item_ids_are_sent_for_all_remote_v2_compaction_requests() -> a
     .await;
     let test = test_codex()
         .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
-        .with_config(|config| {
-            let _ = config.features.enable(Feature::RemoteCompactionV2);
-        })
         .build(&server)
         .await?;
 

codex-rs/core/tests/suite/compact.rs

@@ -2892,7 +2892,6 @@ async fn pre_sampling_compact_falls_back_after_previous_model_invalid_request_on
             config.model_provider = model_provider;
             config.tool_registry.turn_metadata_includes_tool_info = true;
             set_test_compact_prompt(config);
-            let _ = config.features.enable(Feature::RemoteCompactionV2);
         });
     let test = builder.build(&server).await.expect("build test codex");
 
@@ -5312,10 +5311,7 @@ async fn remote_v2_compaction_keeps_creation_time_instructions_after_same_path_m
     )?;
     let mut builder = test_codex()
         .with_home(Arc::clone(&home))
-        .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
-        .with_config(|config| {
-            let _ = config.features.enable(Feature::RemoteCompactionV2);
-        });
+        .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing());
     let test = builder.build(&server).await?;
 
     // Materialize the old snapshot, rewrite the selected file in place, and compact remotely.
@@ -5375,10 +5371,7 @@ async fn remote_v2_compaction_keeps_creation_time_instructions_after_same_path_m
     let mut resume_builder = test_codex()
         .with_home(Arc::clone(&home))
         .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
-        .with_config(move |config| {
-            config.cwd = resumed_cwd;
-            let _ = config.features.enable(Feature::RemoteCompactionV2);
-        });
+        .with_config(move |config| config.cwd = resumed_cwd);
     let resumed = resume_builder
         .resume(&server, Arc::clone(&home), rollout_path)
         .await?;

codex-rs/core/tests/suite/compact_remote.rs

@@ -188,7 +188,6 @@ fn amazon_bedrock_test_codex() -> TestCodexBuilder {
         .with_auth(auth)
         .with_model(AMAZON_BEDROCK_GPT_5_5_MODEL_ID)
         .with_config(|config| {
-            let _ = config.features.enable(Feature::RemoteCompactionV2);
             config.model_provider = ModelProviderInfo {
                 base_url: config.model_provider.base_url.clone(),
                 ..ModelProviderInfo::create_amazon_bedrock_provider(/*aws*/ None)
@@ -353,10 +352,6 @@ async fn remote_compact_v2_retains_only_client_developer_messages_when_enabled(
         test_codex()
             .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
             .with_config(move |config| {
-                config
-                    .features
-                    .enable(Feature::RemoteCompactionV2)
-                    .expect("remote compaction v2 should be configurable");
                 if enabled {
                     config
                         .features
@@ -441,14 +436,7 @@ async fn remote_compact_v2_records_usage_before_output_validation() -> Result<()
     skip_if_no_network!(Ok(()));
 
     let harness = TestCodexHarness::with_auto_env_builder(
-        test_codex()
-            .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
-            .with_config(|config| {
-                config
-                    .features
-                    .enable(Feature::RemoteCompactionV2)
-                    .expect("remote compaction v2 should be configurable");
-            }),
+        test_codex().with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing()),
     )
     .await?;
     let codex = &harness.test().codex;
@@ -588,7 +576,6 @@ async fn remote_compact_v2_charges_retained_images_to_token_budget(
         test_codex()
             .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
             .with_config(move |config| {
-                let _ = config.features.enable(Feature::RemoteCompactionV2);
                 let _ = config.features.enable(Feature::UnifiedImageBudget);
                 if let Some(enabled) = image_budget_enabled {
                     let _ = config
@@ -724,11 +711,7 @@ async fn remote_compact_v2_reuses_compaction_trigger_for_followups() -> Result<(
     skip_if_no_network!(Ok(()));
 
     let harness = TestCodexHarness::with_builder(
-        test_codex()
-            .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
-            .with_config(|config| {
-                let _ = config.features.enable(Feature::RemoteCompactionV2);
-            }),
+        test_codex().with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing()),
     )
     .await?;
     let image_url = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR4nGNgYAAAAAMAASsJTYQAAAAASUVORK5CYII=";
@@ -1082,7 +1065,6 @@ async fn remote_compact_v2_retries_failures_with_stream_retry_budget() -> Result
             .with_history_mode(ThreadHistoryMode::Paginated)
             .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
             .with_config(|config| {
-                let _ = config.features.enable(Feature::RemoteCompactionV2);
                 config.model_provider.request_max_retries = Some(0);
                 config.model_provider.stream_max_retries = Some(2);
             }),
@@ -1418,7 +1400,6 @@ async fn remote_mid_turn_compact_v2_sends_turn_state_over_http() -> Result<()> {
         test_codex()
             .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
             .with_config(|config| {
-                let _ = config.features.enable(Feature::RemoteCompactionV2);
                 config.model_auto_compact_token_limit = Some(200);
             }),
     )
@@ -1547,7 +1528,6 @@ async fn remote_mid_turn_compact_v2_sends_turn_state_over_websocket() -> Result<
     let mut builder = test_codex()
         .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
         .with_config(|config| {
-            let _ = config.features.enable(Feature::RemoteCompactionV2);
             config.model_auto_compact_token_limit = Some(200);
         });
     let test = builder.build_with_websocket_server(&server).await?;

codex-rs/core/tests/suite/cyber_access_program.rs

@@ -217,10 +217,7 @@ async fn cyber_access_program_survives_mid_turn_remote_compaction_v2() -> Result
     .await;
     let test = test_codex()
         .with_auth(CodexAuth::create_dummy_chatgpt_auth_for_testing())
-        .with_config(|config| {
-            let _ = config.features.disable(Feature::RemoteCompactionV2);
-            config.model_auto_compact_token_limit = Some(200);
-        })
+        .with_config(|config| config.model_auto_compact_token_limit = Some(200))
         .build_with_auto_env(&server)
         .await?;
 

codex-rs/core/tests/suite/pending_input.rs

@@ -1255,7 +1255,6 @@ async fn terminal_compaction_error_does_not_retry_pending_input(
         .with_config(move |config| {
             config.model_provider.base_url = Some(base_url);
             config.model_auto_compact_token_limit = Some(100_000);
-            let _ = config.features.enable(Feature::RemoteCompactionV2);
             // The streaming fixture records raw request bodies for JSON assertions.
             let _ = config.features.disable(Feature::EnableRequestCompression);
         })

codex-rs/core/tests/suite/rollout_budget.rs

@@ -376,12 +376,7 @@ async fn compaction_budget_exhaustion_fails_without_retry(
                 reminder_at_remaining_tokens: vec![5],
                 ..rollout_budget()
             });
-            if remote_v2 {
-                config
-                    .features
-                    .enable(Feature::RemoteCompactionV2)
-                    .expect("test config should allow remote compaction v2");
-            } else {
+            if !remote_v2 {
                 config.model_provider.name = "OpenAI-compatible test provider".to_string();
             }
         })

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_manual_compact_api_auth_prompt_cache_key_request_diff.snap

@@ -1,50 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "context_snapshot::format_request_body_diff_snapshot(scenario,\n\"Last Normal /responses Request\", &normal_request,\n\"Remote /responses/compact Request\", &compact_request,\n&ContextSnapshotOptions::default(),)"
----
-Scenario: After five varied API-key-auth turns, remote manual compaction omits service_tier, reuses prompt_cache_key, and still omits responses-only fields.
-
---- Last Normal /responses Request
-+++ Remote /responses/compact Request
--  "client_metadata": {
--    "root_turn_id": "<UUID>",
--    "session_id": "<UUID>",
--    "thread_id": "<UUID>",
--    "turn_id": "<UUID>",
--    "x-codex-installation-id": "<UUID>",
--    "x-codex-turn-metadata": "{\"installation_id\":\"<UUID>\",\"session_id\":\"<UUID>\",\"thread_id\":\"<UUID>\",\"agent_name\":\"/root\",\"turn_id\":\"<UUID>\",\"window_id\":\"<UUID>:0\",\"window_number\":0,\"context_window_id\":\"<UUID>\",\"request_kind\":\"turn\",\"root_turn_id\":\"<UUID>\",\"sandbox\":\"<SANDBOX>\",\"sandbox_mode\":\"danger-full-access\",\"auto_review_enabled\":false,\"node_repl_auto_review_required\":false,\"node_repl_disabled\":false,\"turn_started_at_unix_ms\":<UNIX_MS>}",
--    "x-codex-window-id": "<UUID>:0"
--  },
--  "include": [
--    "reasoning.encrypted_content"
--  ],
-+    },
-+    {
-+      "content": [
-+        {
-+          "text": "turn five raw content",
-+          "type": "reasoning_text"
-+        }
-+      ],
-+      "encrypted_content": "YmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYnR1cm4gZml2ZSByYXcgY29udGVudA==",
-+      "summary": [
-+        {
-+          "text": "TURN_FIVE_REASONING",
-+          "type": "summary_text"
-+        }
-+      ],
-+      "type": "reasoning"
-+    },
-+    {
-+      "content": [
-+        {
-+          "text": "TURN_FIVE_ASSISTANT",
-+          "type": "output_text"
-+        }
-+      ],
-+      "role": "assistant",
-+      "type": "message"
--  "service_tier": "priority",
--  "store": false,
--  "stream": true,
--  "tool_choice": "auto",

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_manual_compact_chatgpt_auth_service_tier_prompt_cache_key_request_diff.snap

@@ -1,49 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "context_snapshot::format_request_body_diff_snapshot(scenario,\n\"Last Normal /responses Request\", &normal_request,\n\"Remote /responses/compact Request\", &compact_request,\n&ContextSnapshotOptions::default(),)"
----
-Scenario: After five varied ChatGPT-auth turns, remote manual compaction reuses service_tier and prompt_cache_key while omitting responses-only fields.
-
---- Last Normal /responses Request
-+++ Remote /responses/compact Request
--  "client_metadata": {
--    "root_turn_id": "<UUID>",
--    "session_id": "<UUID>",
--    "thread_id": "<UUID>",
--    "turn_id": "<UUID>",
--    "x-codex-installation-id": "<UUID>",
--    "x-codex-turn-metadata": "{\"installation_id\":\"<UUID>\",\"session_id\":\"<UUID>\",\"thread_id\":\"<UUID>\",\"agent_name\":\"/root\",\"turn_id\":\"<UUID>\",\"window_id\":\"<UUID>:0\",\"window_number\":0,\"context_window_id\":\"<UUID>\",\"request_kind\":\"turn\",\"root_turn_id\":\"<UUID>\",\"sandbox\":\"<SANDBOX>\",\"sandbox_mode\":\"danger-full-access\",\"auto_review_enabled\":false,\"node_repl_auto_review_required\":false,\"node_repl_disabled\":false,\"turn_started_at_unix_ms\":<UNIX_MS>}",
--    "x-codex-window-id": "<UUID>:0"
--  },
--  "include": [
--    "reasoning.encrypted_content"
--  ],
-+    },
-+    {
-+      "content": [
-+        {
-+          "text": "turn five raw content",
-+          "type": "reasoning_text"
-+        }
-+      ],
-+      "encrypted_content": "YmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYmJiYnR1cm4gZml2ZSByYXcgY29udGVudA==",
-+      "summary": [
-+        {
-+          "text": "TURN_FIVE_REASONING",
-+          "type": "summary_text"
-+        }
-+      ],
-+      "type": "reasoning"
-+    },
-+    {
-+      "content": [
-+        {
-+          "text": "TURN_FIVE_ASSISTANT",
-+          "type": "output_text"
-+        }
-+      ],
-+      "role": "assistant",
-+      "type": "message"
--  "store": false,
--  "stream": true,
--  "tool_choice": "auto",

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_manual_compact_restates_realtime_start_shapes.snap

@@ -1,21 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote manual /compact while realtime remains active: the next regular turn restates realtime-start instructions after compaction clears the baseline.\",\n&[(\"Remote Compaction Request\", &compact_request),\n(\"Remote Post-Compaction History Layout\", post_compact_request),])"
----
-Scenario: Remote manual /compact while realtime remains active: the next regular turn restates realtime-start instructions after compaction clears the baseline.
-
-## Remote Compaction Request
-00:message/developer[2]:
-    [01] <realtime_conversation>\nRealtime conversation started.\n\nYou a...
-    [02] <PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:USER_ONE
-03:message/assistant:REMOTE_FIRST_REPLY
-
-## Remote Post-Compaction History Layout
-00:compaction:encrypted=true
-01:message/developer[2]:
-    [01] <realtime_conversation>\nRealtime conversation started.\n\nYou a...
-    [02] <PERMISSIONS_INSTRUCTIONS>
-02:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-03:message/user:USER_TWO

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_manual_compact_with_history_shapes.snap

@@ -1,17 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote manual /compact where remote compact output is compaction-only: follow-up layout uses the returned compaction item plus new user message.\",\n&[(\"Remote Compaction Request\", &compact_request),\n(\"Remote Post-Compaction History Layout\", follow_up_request),])"
----
-Scenario: Remote manual /compact where remote compact output is compaction-only: follow-up layout uses the returned compaction item plus new user message.
-
-## Remote Compaction Request
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:hello remote compact
-03:message/assistant:FIRST_REMOTE_REPLY
-
-## Remote Post-Compaction History Layout
-00:compaction:encrypted=true
-01:message/developer:<PERMISSIONS_INSTRUCTIONS>
-02:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-03:message/user:after compact

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_manual_compact_without_prev_user_shapes.snap

@@ -1,10 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote manual /compact with no prior user turn skips the remote compact request; the follow-up turn carries canonical context and new user message.\",\n&[(\"Remote Post-Compaction History Layout\", &follow_up_request)])"
----
-Scenario: Remote manual /compact with no prior user turn skips the remote compact request; the follow-up turn carries canonical context and new user message.
-
-## Remote Post-Compaction History Layout
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:USER_ONE

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_mid_turn_compaction_does_not_restate_realtime_end_shapes.snap

@@ -1,32 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote mid-turn continuation compaction after realtime was closed before the turn: the initial second-turn request emits realtime-end instructions, but the continuation request does not restate them after compaction because the current turn already established the inactive baseline.\",\n&[(\"Second Turn Initial Request\", second_turn_request),\n(\"Remote Compaction Request\", &compact_request),\n(\"Remote Post-Compaction History Layout\", post_compact_request),])"
----
-Scenario: Remote mid-turn continuation compaction after realtime was closed before the turn: the initial second-turn request emits realtime-end instructions, but the continuation request does not restate them after compaction because the current turn already established the inactive baseline.
-
-## Second Turn Initial Request
-00:message/developer[2]:
-    [01] <realtime_conversation>\nRealtime conversation started.\n\nYou a...
-    [02] <PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:SETUP_USER
-03:message/assistant:REMOTE_SETUP_REPLY
-04:message/developer:<realtime_conversation>\nRealtime conversation ended.\n\nSubsequ...
-05:message/user:USER_TWO
-
-## Remote Compaction Request
-00:message/developer[2]:
-    [01] <realtime_conversation>\nRealtime conversation started.\n\nYou a...
-    [02] <PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:SETUP_USER
-03:message/assistant:REMOTE_SETUP_REPLY
-04:message/developer:<realtime_conversation>\nRealtime conversation ended.\n\nSubsequ...
-05:message/user:USER_TWO
-06:function_call/test_tool
-07:function_call_output:unsupported call: test_tool
-
-## Remote Post-Compaction History Layout
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:compaction:encrypted=true

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_mid_turn_compaction_multi_summary_reinjects_above_last_summary_shapes.snap

@@ -1,16 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"After a prior manual /compact produced an older remote compaction item, the next turn hits remote auto-compaction before the next sampling request. The compact request carries forward that earlier compaction item, and the next sampling request shows the latest compaction item with context reinjected before USER_TWO.\",\n&[(\"Remote Compaction Request\", &compact_request),\n(\"Second Turn Request (After Compaction)\", &second_turn_request),])"
----
-Scenario: After a prior manual /compact produced an older remote compaction item, the next turn hits remote auto-compaction before the next sampling request. The compact request carries forward that earlier compaction item, and the next sampling request shows the latest compaction item with context reinjected before USER_TWO.
-
-## Remote Compaction Request
-00:message/user:USER_ONE
-01:compaction:encrypted=true
-
-## Second Turn Request (After Compaction)
-00:message/user:USER_ONE
-01:compaction:encrypted=true
-02:message/developer:<PERMISSIONS_INSTRUCTIONS>
-03:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-04:message/user:USER_TWO

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_mid_turn_compaction_shapes.snap

@@ -1,18 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote mid-turn continuation compaction after tool output: compact request includes tool artifacts and the follow-up request includes the returned compaction item.\",\n&[(\"Remote Compaction Request\", &compact_request),\n(\"Remote Post-Compaction History Layout\", &requests[1]),])"
----
-Scenario: Remote mid-turn continuation compaction after tool output: compact request includes tool artifacts and the follow-up request includes the returned compaction item.
-
-## Remote Compaction Request
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:USER_ONE
-03:function_call/test_tool
-04:function_call_output:unsupported call: test_tool
-
-## Remote Post-Compaction History Layout
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:USER_ONE
-03:compaction:encrypted=true

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_mid_turn_compaction_summary_only_reinjects_context_shapes.snap

@@ -1,17 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote mid-turn compaction where compact output has only a compaction item: continuation layout reinjects context before that compaction item.\",\n&[(\"Remote Compaction Request\", &compact_request),\n(\"Remote Post-Compaction History Layout\", &post_compact_turn_request),])"
----
-Scenario: Remote mid-turn compaction where compact output has only a compaction item: continuation layout reinjects context before that compaction item.
-
-## Remote Compaction Request
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:USER_ONE
-03:function_call/test_tool
-04:function_call_output:unsupported call: test_tool
-
-## Remote Post-Compaction History Layout
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:compaction:encrypted=true

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_pre_turn_compaction_context_window_exceeded_shapes.snap

@@ -1,11 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote pre-turn auto-compaction context-window failure: compaction request excludes the incoming user message and the turn errors.\",\n&[(\"Remote Compaction Request (Incoming User Excluded)\",\n&include_attempt_request),])"
----
-Scenario: Remote pre-turn auto-compaction context-window failure: compaction request excludes the incoming user message and the turn errors.
-
-## Remote Compaction Request (Incoming User Excluded)
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:USER_ONE
-03:message/assistant:REMOTE_FIRST_REPLY

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_pre_turn_compaction_failure_shapes.snap

@@ -1,11 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote pre-turn auto-compaction parse failure: compaction request excludes the incoming user message and the turn stops.\",\n&[(\"Remote Compaction Request (Incoming User Excluded)\",\n&first_compact_mock.single_request()),])"
----
-Scenario: Remote pre-turn auto-compaction parse failure: compaction request excludes the incoming user message and the turn stops.
-
-## Remote Compaction Request (Incoming User Excluded)
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:turn that exceeds token threshold
-03:message/assistant:initial turn complete

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_pre_turn_compaction_including_incoming_shapes.snap

@@ -1,21 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote pre-turn auto-compaction with a context override emits the context diff in the compact request while excluding the incoming user message.\",\n&[(\"Remote Compaction Request\", &compact_request),\n(\"Remote Post-Compaction History Layout\", &requests[2]),])"
----
-Scenario: Remote pre-turn auto-compaction with a context override emits the context diff in the compact request while excluding the incoming user message.
-
-## Remote Compaction Request
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:USER_ONE
-03:message/assistant:REMOTE_FIRST_REPLY
-04:message/user:USER_TWO
-05:message/assistant:REMOTE_SECOND_REPLY
-
-## Remote Post-Compaction History Layout
-00:message/user:USER_ONE
-01:message/user:USER_TWO
-02:compaction:encrypted=true
-03:message/developer:<PERMISSIONS_INSTRUCTIONS>
-04:message/user:<ENVIRONMENT_CONTEXT:cwd=PRETURN_CONTEXT_DIFF_CWD>
-05:message/user:USER_THREE

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_pre_turn_compaction_restates_realtime_start_shapes.snap

@@ -1,21 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote pre-turn auto-compaction while realtime remains active: compaction clears the reference baseline, so the follow-up request restates realtime-start instructions.\",\n&[(\"Remote Compaction Request\", &compact_request),\n(\"Remote Post-Compaction History Layout\", post_compact_request),])"
----
-Scenario: Remote pre-turn auto-compaction while realtime remains active: compaction clears the reference baseline, so the follow-up request restates realtime-start instructions.
-
-## Remote Compaction Request
-00:message/developer[2]:
-    [01] <realtime_conversation>\nRealtime conversation started.\n\nYou a...
-    [02] <PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:USER_ONE
-03:message/assistant:REMOTE_FIRST_REPLY
-
-## Remote Post-Compaction History Layout
-00:compaction:encrypted=true
-01:message/developer[2]:
-    [01] <realtime_conversation>\nRealtime conversation started.\n\nYou a...
-    [02] <PERMISSIONS_INSTRUCTIONS>
-02:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-03:message/user:USER_TWO

codex-rs/core/tests/suite/snapshots/all__suite__compact_remote__remote_pre_turn_compaction_strips_incoming_model_switch_shapes.snap

@@ -1,25 +0,0 @@
----
-source: core/tests/suite/compact_remote.rs
-expression: "format_labeled_requests_snapshot(\"Remote pre-turn compaction during model switch currently excludes incoming user input, strips incoming <model_switch> from the compact request payload, and restores it in the post-compaction follow-up request.\",\n&[(\"Initial Request (Previous Model)\", &initial_turn_request),\n(\"Remote Compaction Request\", &compact_request),\n(\"Remote Post-Compaction History Layout\", &post_compact_turn_request),])"
----
-Scenario: Remote pre-turn compaction during model switch currently excludes incoming user input, strips incoming <model_switch> from the compact request payload, and restores it in the post-compaction follow-up request.
-
-## Initial Request (Previous Model)
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:BEFORE_SWITCH_USER
-
-## Remote Compaction Request
-00:message/developer:<PERMISSIONS_INSTRUCTIONS>
-01:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-02:message/user:BEFORE_SWITCH_USER
-03:message/assistant:BEFORE_SWITCH_REPLY
-
-## Remote Post-Compaction History Layout
-00:message/user:BEFORE_SWITCH_USER
-01:compaction:encrypted=true
-02:message/developer[2]:
-    [01] <model_switch>\nThe user was previously using a different model....
-    [02] <PERMISSIONS_INSTRUCTIONS>
-03:message/user:<ENVIRONMENT_CONTEXT:cwd=<CWD>>
-04:message/user:AFTER_SWITCH_USER