Zahan Malkani 536f86e5cc Support attaching to existing realtime calls (#39876) ...

## Why

Clients that create and negotiate realtime calls themselves need Codex to join
those calls without creating another call or overwriting the client-owned
session configuration.

## What changed

- Add the `existingCall` transport to `thread/realtime/start`, accepting a
  client-provided `callId` and optional `realtimeSessionId`.
- Attach Codex over the call's sideband WebSocket without SDP negotiation or a
  session update, and reconnect that sideband while preserving transcript
  state.
- Default existing calls to realtime v1, support v1 and v3, and reject v2 or
  options that would reconfigure the client-owned session.
- Encode call IDs as a single URL path segment for v3 sideband connections.

## Testing

Add protocol, app-server, core, reconnection, authentication-header, and URL
encoding coverage for existing-call attachments.

GitOrigin-RevId: 2046b70566f98efa55381bb1e461ea3cc68256c5

2026-08-21 06:41:28 +00:00

..

snapshots

Include context window IDs in response metadata (#39847)

2026-08-21 03:31:56 +00:00

abort_tasks.rs

Standardize shell execution on unified exec (#39757)

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

additional_context.rs

Unify turn input submission and routing (#38275)

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

agent_execution.rs

Standardize shell execution on unified exec (#39772)

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

agent_websocket.rs

Standardize shell execution on unified exec (#39757)

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

agents_md.rs

Ignore project instructions for untrusted projects (#39837)

2026-08-21 02:33:50 +00:00

apply_patch_cli.rs

Standardize shell execution on unified exec (#39757)

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

apply_patch_serialization.rs

Standardize shell execution on unified exec (#39757)

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

approvals.rs

Standardize shell execution on unified exec (#39757)

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

audio_truncation.rs

Unify turn input submission and routing (#38275)

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

auto_review.rs

Standardize shell execution on unified exec (#39757)

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

catalog_permission_messages.rs

Source Guardian v2 defaults from the model catalog (#38990)

2026-08-17 11:44:56 +00:00

cli_stream.rs

Update models.json (#31684)

2026-07-09 03:40:08 +00:00

client_websockets.rs

Unify turn input submission and routing (#38275)

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

client.rs

Support standalone named function call outputs (#39782)

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

cloud_config.rs

Disable Guardian V2 for managed automatic reviewers (#39005)

2026-08-17 13:16:05 +00:00

code_mode_elicitation.rs

Unify turn input submission and routing (#38275)

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

code_mode.rs

Standardize shell execution on unified exec (#39757)

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

codex_delegate.rs

Harden unsandboxed patch filesystem access (#39659)

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

collaboration_instructions.rs

Refresh collaboration instructions when their content changes (#39163)

2026-08-18 07:32:03 +00:00

compact_remote_parity.rs

Standardize shell execution on unified exec (#39757)

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

compact_remote.rs

Include context window IDs in response metadata (#39847)

2026-08-21 03:31:56 +00:00

compact_resume_fork.rs

Unify turn input submission and routing (#38275)

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

compact.rs

Standardize shell execution on unified exec (#39757)

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

current_time_reminder.rs

Standardize shell execution on unified exec (#39757)

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

cyber_exec_policy.rs

Standardize shell execution on unified exec (#39772)

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

deprecation_notice.rs

Standardize shell execution on unified exec (#39772)

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

exec_policy.rs

Standardize shell execution on unified exec (#39757)

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

exec.rs

Add network environment ID plumbing (#28766)

2026-06-18 14:09:38 +02:00

extension_sandbox.rs

Preserve filesystem permission path conventions (#39084)

2026-08-17 21:49:30 +00:00

external_auth.rs

Refresh expired AWS credentials for Bedrock (#39410)

2026-08-19 04:46:58 +00:00

fork_thread.rs

Separate thread settings from environment configuration (#39597)

2026-08-20 05:29:12 +00:00

git_enrichment.rs

Unify turn input submission and routing (#38275)

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

guardian_review.rs

Use model-specific auto-review outcome instructions (#39741)

2026-08-20 16:52:16 +00:00

hooks_mcp.rs

Enable MCP tool hooks in Codex sessions (#39296)

2026-08-18 22:10:43 +00:00

hooks.rs

Standardize shell execution on unified exec (#39772)

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

image_rollout.rs

Unify turn input submission and routing (#38275)

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

injected_models_cache.rs

Unify turn input submission and routing (#38275)

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

items.rs

Unify turn input submission and routing (#38275)

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

json_result.rs

Unify turn input submission and routing (#38275)

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

live_cli.rs

…

mcp_auth_elicitation.rs

Unify turn input submission and routing (#38275)

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

mcp_auth_refresh.rs

Route hook MCP calls through current connections (#39331)

2026-08-19 01:15:10 +00:00

mcp_refresh_cleanup.rs

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

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

mcp_startup_refresh_http_proxy.rs

Harden unsandboxed patch filesystem access (#39659)

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

mcp_tool_cache.rs

Harden unsandboxed patch filesystem access (#39659)

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

mcp_tool_exposure.rs

Enforce environment MCP policies (#39335)

2026-08-19 01:26:16 +00:00

mcp_turn_metadata.rs

Refresh bundled model definitions (#39770)

2026-08-20 18:17:28 +00:00

mod.rs

Standardize shell execution on unified exec (#39757)

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

model_overrides.rs

…

model_runtime_selectors.rs

Unify turn input submission and routing (#38275)

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

model_switching.rs

Standardize shell execution on unified exec (#39757)

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

model_visible_layout.rs

Add a configurable skill catalog token budget (#38978)

2026-08-17 10:01:59 +00:00

models_cache_ttl.rs

Standardize shell execution on unified exec (#39757)

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

models_etag_responses.rs

Standardize shell execution on unified exec (#39757)

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

multi_agent_mode.rs

Source multi-agent instructions from the model catalog (#38619)

2026-08-14 18:26:20 +00:00

multi_agent_resume.rs

Wait for turn completion events in multi-agent resume tests (#39702)

2026-08-20 11:57:32 +00:00

multi_exec_server_sandbox.rs

Standardize shell execution on unified exec (#39772)

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

network_approval.rs

Standardize shell execution on unified exec (#39772)

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

openai_file_mcp.rs

Harden unsandboxed patch filesystem access (#39659)

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

otel.rs

Make tool-result telemetry limits configurable (#39779)

2026-08-20 19:09:04 +00:00

override_updates.rs

…

pending_input.rs

Standardize shell execution on unified exec (#39757)

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

permissions_messages.rs

Source Guardian v2 defaults from the model catalog (#38990)

2026-08-17 11:44:56 +00:00

personality.rs

Source Guardian v2 defaults from the model catalog (#38990)

2026-08-17 11:44:56 +00:00

plugins.rs

Standardize shell execution on unified exec (#39757)

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

prompt_cache_key.rs

Use session IDs for prompt cache keys (#33035)

2026-07-14 10:37:23 +00:00

prompt_caching.rs

Enable unified exec by default on Windows (#38625)

2026-08-14 19:07:15 +00:00

prompt_debug_tests.rs

Enable git attribution across Codex entry points (#34819)

2026-07-22 20:23:35 +00:00

quota_exceeded.rs

Unify turn input submission and routing (#38275)

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

realtime_conversation.rs

Support attaching to existing realtime calls (#39876)

2026-08-21 06:41:28 +00:00

realtime_initial_items.rs

Add a realtime delegation acknowledgement control (#36413)

2026-08-01 01:17:26 +00:00

remote_env.rs

Reset registry retries when refreshing Noise bundles (#39852)

2026-08-21 03:47:37 +00:00

remote_models.rs

Standardize shell execution on unified exec (#39757)

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

request_compression.rs

Unify turn input submission and routing (#38275)

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

request_permissions_tool.rs

Unify turn input submission and routing (#38275)

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

request_permissions.rs

Standardize shell execution on unified exec (#39772)

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

request_plugin_install.rs

Include suggestion IDs in plugin install metadata (#39765)

2026-08-20 17:54:42 +00:00

request_user_input.rs

Unify turn input submission and routing (#38275)

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

responses_api_proxy_headers.rs

Unify turn input submission and routing (#38275)

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

responses_lite.rs

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

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

responses_system_proxy.rs

Migrate login HTTP construction to HttpClient (#34643)

2026-07-22 00:50:28 +00:00

resume_warning.rs

Persist active permission profiles in turn context (#39145)

2026-08-18 05:46:08 +00:00

resume.rs

Unify turn input submission and routing (#38275)

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

retry_after.rs

Add structured telemetry for response retries (#38452)

2026-08-13 23:13:37 +00:00

review.rs

Harden unsandboxed patch filesystem access (#39659)

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

rmcp_client.rs

Standardize shell execution on unified exec (#39772)

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

rollout_budget.rs

Unify turn input submission and routing (#38275)

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

rollout_list_find.rs

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

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

safety_buffering.rs

Unify turn input submission and routing (#38275)

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

safety_check_downgrade.rs

Standardize shell execution on unified exec (#39757)

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

search_tool.rs

Unify turn input submission and routing (#38275)

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

send_user_message_async.rs

Keep async user messages on the direct tool surface (#39601)

2026-08-20 05:42:20 +00:00

shell_snapshot.rs

Standardize shell execution on unified exec (#39772)

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

skill_approval.rs

Standardize shell execution on unified exec (#39757)

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

skills_extension.rs

Standardize shell execution on unified exec (#39772)

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

skills.rs

Harden unsandboxed patch filesystem access (#39659)

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

spawn_agent_description.rs

Standardize shell execution on unified exec (#39757)

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

sqlite_state.rs

Standardize shell execution on unified exec (#39757)

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

stream_error_allows_next_turn.rs

Unify turn input submission and routing (#38275)

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

stream_no_completed.rs

Unify turn input submission and routing (#38275)

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

subagent_notifications.rs

Sanitize developer context in full-history agent forks (#39641)

2026-08-20 07:29:43 +00:00

token_budget.rs

Include context window IDs in response metadata (#39847)

2026-08-21 03:31:56 +00:00

tool_harness.rs

Standardize shell execution on unified exec (#39757)

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

tool_lifecycle.rs

Support standalone named function call outputs (#39782)

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

tool_parallelism.rs

Standardize shell execution on unified exec (#39757)

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

tools.rs

Standardize shell execution on unified exec (#39757)

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

truncation.rs

Standardize shell execution on unified exec (#39757)

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

turn_input_submission.rs

Centralize thread environment selection state (#38423)

2026-08-13 19:25:05 +00:00

turn_state.rs

Standardize shell execution on unified exec (#39757)

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

unified_exec_process_events.rs

Standardize shell execution on unified exec (#39772)

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

unified_exec_zsh_fork_approvals.rs

Deduplicate zsh fork test setup (#39790)

2026-08-20 19:43:54 +00:00

unified_exec.rs

Support standalone named function call outputs (#39782)

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

unstable_features_warning.rs

Extract persisted history types into a dedicated crate (#37871)

2026-08-10 19:26:52 +00:00

user_notification.rs

Unify turn input submission and routing (#38275)

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

user_shell_cmd.rs

Standardize shell execution on unified exec (#39757)

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

view_image.rs

Standardize shell execution on unified exec (#39757)

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

web_search.rs

Add an Amazon Bedrock Runtime provider (#38470)

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

websocket_fallback.rs

Unify turn input submission and routing (#38275)

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

window_headers.rs

Include context window IDs in response metadata (#39847)

2026-08-21 03:31:56 +00:00

windows_sandbox.rs

Standardize shell execution on unified exec (#39757)

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

workspace_roots.rs

Standardize shell execution on unified exec (#39772)

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

worktree_trust.rs

Validate linked worktrees before inheriting project trust (#39616)

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