Vivian Fang 4b24638e1c Prewarm code-mode host connections at session startup (#40678) ...

## What changed

- Add the opt-in `code_mode_prewarm` feature to establish the code-mode host session during startup, before the first turn.
- Make in-progress host initialization cancellable so a stalled prewarm does not block shutdown.
- Share a failed connection attempt with concurrent callers instead of immediately starting another attempt.

## Testing

- Verify app-server contacts the configured host before the first turn and can shut down while that connection is stalled.
- Exercise shared remote-host behavior with prewarming enabled.

GitOrigin-RevId: 3cfde5509be7b4aba80112c36c5616b9a9b632c6

2026-08-25 19:16:45 +00:00

..

account_thread_usage.rs

Show estimated thread usage in /status (#38281)

2026-08-13 00:30:08 +00:00

account.rs

Support managed AWS access keys for Amazon Bedrock (#40481)

2026-08-24 21:39:48 +00:00

analytics.rs

Track remaining multi-agent v2 tools in analytics (#40585)

2026-08-25 10:17:03 +00:00

app_installed.rs

Remove the workspace settings gate for apps and plugins (#38994)

2026-08-17 12:26:59 +00:00

app_list.rs

Support managed AWS access keys for Amazon Bedrock (#40481)

2026-08-24 21:39:48 +00:00

app_read.rs

Use thread configuration for app/read (#37891)

2026-08-10 22:39:29 +00:00

attestation.rs

Keep credentials out of app-server logs (#39993)

2026-08-21 19:04:32 +00:00

auto_env.rs

test: add delayed exec-server transport (#31427)

2026-07-09 00:17:38 +00:00

bedrock_setup.rs

Support managed AWS access keys for Amazon Bedrock (#40481)

2026-08-24 21:39:48 +00:00

client_metadata.rs

Add turn trigger metadata (#40665)

2026-08-25 18:11:04 +00:00

code_mode_host.rs

Prewarm code-mode host connections at session startup (#40678)

2026-08-25 19:16:45 +00:00

collaboration_mode_list.rs

test: migrate TestAppServer callers to builder (#31451)

2026-07-08 00:15:49 +00:00

command_exec.rs

Preserve managed deny-read rules across permission updates (#40004)

2026-08-21 20:15:23 +00:00

compaction.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

config_requirements_in_app_browser.rs

Expose browser and computer-use requirements through app-server (#40000)

2026-08-21 19:56:52 +00:00

config_rpc.rs

Add browser and computer use configuration (#40018)

2026-08-21 21:41:55 +00:00

connection_handling_websocket_unix.rs

[codex] Add user input client ids (#24653)

2026-05-28 14:54:39 -07:00

connection_handling_websocket.rs

Remove app-server's direct reqwest dependency (#39293)

2026-08-18 22:00:25 +00:00

curated_mcp_sync.rs

Isolate automatic plugin Git operations (#39520)

2026-08-19 17:34:00 +00:00

current_time.rs

Tag current time reminders in model context (#38443)

2026-08-13 21:53:52 +00:00

dynamic_tools.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

environment_add.rs

Report selected environment connection transitions (#33251)

2026-07-15 05:21:13 +00:00

environment_info.rs

Cache executor metadata from initialization (#40343)

2026-08-24 06:43:07 +00:00

environment_status.rs

Expose environment status through app-server (#32920)

2026-07-14 01:49:16 +00:00

exec_server_test_support.rs

[app-server] expose environment info RPC (#30291)

2026-06-27 19:34:10 +00:00

executor_mcp.rs

Cache executor metadata from initialization (#40343)

2026-08-24 06:43:07 +00:00

executor_skills.rs

Honor response budgets when reading skill resources (#40491)

2026-08-24 23:00:57 +00:00

experimental_api.rs

Add turn-scoped settings updates to the app server (#40656)

2026-08-25 17:55:50 +00:00

experimental_feature_list.rs

Remove the workspace settings gate for apps and plugins (#38994)

2026-08-17 12:26:59 +00:00

external_agent_config.rs

Stop migrating Cursor sandbox settings (#39325)

2026-08-19 01:06:12 +00:00

external_agent_import_sync.rs

Sync updates to imported external agent sessions (#36356)

2026-07-31 16:17:44 +00:00

feedback.rs

Report diagnostic upload failures (#39287)

2026-08-18 21:46:18 +00:00

fs.rs

test: migrate TestAppServer callers to builder (#31451)

2026-07-08 00:15:49 +00:00

git_attribution.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

guardian_v2.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

history_notes_extension.rs

Inject history notes hints into context windows (#40539)

2026-08-25 04:05:38 +00:00

hooks_list.rs

Validate linked worktrees before inheriting project trust (#39616)

2026-08-20 06:29:32 +00:00

host_skills.rs

Refresh host skill catalogs through world state (#33425)

2026-07-15 20:59:21 +00:00

imagegen_extension.rs

Expose image generation usage-limit failures (#38024)

2026-08-11 15:40:52 +00:00

initialize.rs

Negotiate MCP extensions per app-server session (#36910)

2026-08-04 15:23:43 +00:00

marketplace_add.rs

Handle @ in local marketplace paths (#34959)

2026-07-23 15:32:36 +00:00

marketplace_remove.rs

Keep marketplace upgrade state out of config (#39595)

2026-08-20 05:24:56 +00:00

marketplace_upgrade.rs

Keep marketplace upgrade state out of config (#39595)

2026-08-20 05:24:56 +00:00

mcp_event_stream.rs

Add app-server MCP event streaming (#39761)

2026-08-20 17:49:35 +00:00

mcp_resource_origin.rs

Scope MCP resource reads by connector (#39244)

2026-08-18 18:01:39 +00:00

mcp_resource.rs

Retire the untrusted approval policy (#39630)

2026-08-20 07:03:02 +00:00

mcp_server_elicitation.rs

Preserve strict MCP auto-review outcomes (#40031)

2026-08-21 23:14:28 +00:00

mcp_server_status.rs

Report runtime MCP connection status (#40068)

2026-08-22 05:54:43 +00:00

mcp_tool.rs

Support MCP form input in full-access user threads (#37864)

2026-08-10 18:20:12 +00:00

memory_reset.rs

Honor the configured SQLite home across state consumers (#34994)

2026-07-23 19:19:35 +00:00

misalignment_policy.rs

Surface misalignment policy violations as typed errors (#38682)

2026-08-15 01:34:33 +00:00

mod.rs

Add turn-scoped settings updates to the app server (#40656)

2026-08-25 17:55:50 +00:00

model_auto_review.rs

Restore permission profiles when resuming threads (#39153)

2026-08-18 06:22:04 +00:00

model_list.rs

Enable parallel tool calls for all model prompts (#38499)

2026-08-14 05:49:33 +00:00

model_provider_capabilities_read.rs

Add an Amazon Bedrock Runtime provider (#38470)

2026-08-14 01:23:59 +00:00

multi_agent_v2_developer_instructions.rs

Reload Multi-Agent V2 children through their parent (#40477)

2026-08-24 20:47:10 +00:00

otel.rs

Reload app-server telemetry after account changes (#37339)

2026-08-07 00:28:32 +00:00

output_schema.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

permission_profile_list.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

plan_item.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

plugin_install.rs

Remove the workspace settings gate for apps and plugins (#38994)

2026-08-17 12:26:59 +00:00

plugin_list.rs

Prevent marketplace identity spoofing (#39165)

2026-08-18 07:56:41 +00:00

plugin_read.rs

Prevent marketplace identity spoofing (#39165)

2026-08-18 07:56:41 +00:00

plugin_search.rs

Merge local plugins into plugin search results (#36919)

2026-08-04 16:16:30 +00:00

plugin_share.rs

Expose plugin installation timestamps in app-server summaries (#35859)

2026-07-29 01:16:29 +00:00

plugin_uninstall.rs

Run plugin app-server tests in automatic environments (#38189)

2026-08-12 13:33:01 +00:00

process_exec.rs

Prevent launch context from reaching child processes (#37607)

2026-08-08 16:58:26 +00:00

projects.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

rate_limit_reset_credits.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

rate_limits.rs

Support Edu Plus and Edu Pro account plans (#39316)

2026-08-18 23:47:00 +00:00

realtime_conversation.rs

Persist realtime events in the thread timeline (#40508)

2026-08-25 01:03:20 +00:00

recommended_plugins.rs

Hydrate recommended plugin metadata on selection (#39143)

2026-08-18 05:42:39 +00:00

remote_control.rs

Exit the stdio app-server when its connection closes (#36035)

2026-07-29 22:00:20 +00:00

remote_thread_store.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

request_permissions.rs

Retire the untrusted approval policy (#39630)

2026-08-20 07:03:02 +00:00

request_user_input.rs

Retire the untrusted approval policy (#39630)

2026-08-20 07:03:02 +00:00

request_validation.rs

Support standalone named function call outputs (#39782)

2026-08-20 19:19:41 +00:00

residency.rs

Enforce managed residency for model providers (#39645)

2026-08-20 07:33:27 +00:00

review.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

rollout_migration.rs

Start rollout migration after runtime feature enablement (#40668)

2026-08-25 18:14:32 +00:00

safety_check_downgrade.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

selected_capability_stack.rs

Honor managed plugin disablement for executor capabilities (#40640)

2026-08-25 16:47:13 +00:00

selected_environment.rs

Harden unsandboxed patch filesystem access (#39659)

2026-08-20 08:10:08 +00:00

server_diagnostics.rs

Expose runtime activity in server diagnostics (#37486)

2026-08-07 18:38:24 +00:00

session_end.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

skills_list.rs

Deduplicate plugin skills in unified mentions (#40501)

2026-08-25 00:15:49 +00:00

sleep.rs

Refresh environment dates from the configured clock (#36187)

2026-07-30 16:44:18 +00:00

thread_archive.rs

Shut down resumed descendants when archiving thread trees (#40179)

2026-08-23 03:25:56 +00:00

thread_delete.rs

Enforce writer ownership for thread archive and deletion (#35031)

2026-07-23 23:18:06 +00:00

thread_fork.rs

Deprecate full-history hydration for paginated threads (#40676)

2026-08-25 19:06:42 +00:00

thread_inject_items.rs

Handle standalone tool outputs as external context (#39791)

2026-08-20 19:46:29 +00:00

thread_list.rs

Reload Multi-Agent V2 children through their parent (#40477)

2026-08-24 20:47:10 +00:00

thread_loaded_list.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

thread_memory_mode_set.rs

Honor the configured SQLite home across state consumers (#34994)

2026-07-23 19:19:35 +00:00

thread_metadata_update.rs

Persist thread section moves before the first turn (#39523)

2026-08-19 17:57:40 +00:00

thread_name_websocket.rs

Restore app-server websocket listener with auth guard (#22404)

2026-05-12 18:40:53 -07:00

thread_queue.rs

Add turn trigger metadata (#40665)

2026-08-25 18:11:04 +00:00

thread_read.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

thread_resume.rs

Deprecate full-history hydration for paginated threads (#40676)

2026-08-25 19:06:42 +00:00

thread_revert.rs

Add app-server support for reverting paginated threads (#38440)

2026-08-13 21:45:02 +00:00

thread_rollback.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

thread_sections.rs

Add appearance metadata to thread sections (#37898)

2026-08-10 23:32:42 +00:00

thread_settings_update.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

thread_shell_command.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

thread_start.rs

Default durable threads to paginated history (#40677)

2026-08-25 19:10:35 +00:00

thread_status.rs

Retire the untrusted approval policy (#39630)

2026-08-20 07:03:02 +00:00

thread_timeline.rs

Persist realtime events in the thread timeline (#40508)

2026-08-25 01:03:20 +00:00

thread_unarchive.rs

Add appearance metadata to thread sections (#37898)

2026-08-10 23:32:42 +00:00

thread_unsubscribe.rs

Simplify app-server integration test setup (#34786)

2026-07-22 16:30:12 +00:00

turn_interrupt.rs

Standardize shell execution on unified exec (#39757)

2026-08-20 17:46:05 +00:00

turn_settings_update.rs

Add turn-scoped settings updates to the app server (#40656)

2026-08-25 17:55:50 +00:00

turn_start_zsh_fork.rs

Standardize shell execution on unified exec (#39772)

2026-08-20 18:29:35 +00:00

turn_start.rs

Add turn trigger metadata (#40665)

2026-08-25 18:11:04 +00:00

turn_steer.rs

Standardize shell execution on unified exec (#39757)

2026-08-20 17:46:05 +00:00

view_image.rs

Allow disabling the built-in image viewer (#36966)

2026-08-04 20:10:31 +00:00

web_search.rs

Allow custom providers to opt into standalone web search (#34846)

2026-07-23 00:02:15 +00:00

windows_sandbox_setup.rs

test: migrate TestAppServer callers to builder (#31451)

2026-07-08 00:15:49 +00:00