guinness-oaiandGitHub 1029742cf7 Add realtime silence tool (#18635) ...

## Summary

Adds a second realtime v2 function tool, `remain_silent`, so the
realtime model has an explicit non-speaking action when the
collaboration mode or latest context says it should not answer aloud.
This is stacked on #18597.

## Design

- Advertise `remain_silent` alongside `background_agent` in realtime v2
conversational sessions.
- Parse `remain_silent` function calls into a typed
`RealtimeEvent::NoopRequested` event.
- Have core answer that function call with an empty
`function_call_output` and deliberately avoid `response.create`, so no
follow-up realtime response is requested.
- Keep the event hidden from app-server/TUI surfaces; it is operational
plumbing, not user-visible conversation content.

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..

snapshots

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abort_tasks.rs

Update models.json (#18586)

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agent_jobs.rs

chore: clean up argument-comment lint and roll out all-target CI on macOS (#16054)

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agent_websocket.rs

chore: clean up argument-comment lint and roll out all-target CI on macOS (#16054)

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agents_md.rs

Run exec-server fs operations through sandbox helper (#17294)

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apply_patch_cli.rs

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approvals.rs

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cli_stream.rs

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client_websockets.rs

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client.rs

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code_mode.rs

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codex_delegate.rs

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collaboration_instructions.rs

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compact_remote.rs

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compact_resume_fork.rs

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compact.rs

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deprecation_notice.rs

fix: deprecate use_legacy_landlock feature flag (#17971)

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exec_policy.rs

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exec.rs

sandbox: remove dead seatbelt helper and update tests (#17859)

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fork_thread.rs

Forward app-server turn clientMetadata to Responses (#16009)

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hierarchical_agents.rs

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hooks.rs

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image_rollout.rs

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items.rs

Spread AbsolutePathBuf (#17792)

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js_repl.rs

Add server-level approval defaults for custom MCP servers (#17843)

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json_result.rs

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live_cli.rs

feat: introduce codex-utils-cargo-bin as an alternative to assert_cmd::Command (#8496)

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live_reload.rs

Refactor config types into a separate crate (#16962)

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memories.rs

nit: telepathy to chronicle in tests (#18652)

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mod.rs

sandbox: remove dead seatbelt helper and update tests (#17859)

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model_overrides.rs

Add Smart Approvals guardian review across core, app-server, and TUI (#13860)

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model_switching.rs

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model_visible_layout.rs

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models_cache_ttl.rs

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models_etag_responses.rs

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openai_file_mcp.rs

register all mcp tools with namespace (#17404)

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otel.rs

Persist and prewarm agent tasks per thread (#17978)

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override_updates.rs

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pending_input.rs

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permissions_messages.rs

Forward app-server turn clientMetadata to Responses (#16009)

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personality_migration.rs

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personality.rs

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plugins.rs

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prompt_caching.rs

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quota_exceeded.rs

Forward app-server turn clientMetadata to Responses (#16009)

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realtime_conversation.rs

Add realtime silence tool (#18635)

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remote_env.rs

Stabilize exec-server filesystem tests in CI (#17671)

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remote_models.rs

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request_compression.rs

Forward app-server turn clientMetadata to Responses (#16009)

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request_permissions_tool.rs

protocol: canonicalize file system permissions (#18274)

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request_permissions.rs

protocol: canonicalize file system permissions (#18274)

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request_user_input.rs

chore(core) Add approvals reviewer to UserTurn (#15426)

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responses_api_proxy_headers.rs

fix: more flake (#18006)

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resume_warning.rs

feat(permissions): add glob deny-read policy support (#15979)

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resume.rs

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review.rs

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rmcp_client.rs

[5/6] Wire executor-backed MCP stdio (#18212)

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rollout_list_find.rs

chore: merge name and title (#17116)

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safety_check_downgrade.rs

chore(core) Add approvals reviewer to UserTurn (#15426)

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search_tool.rs

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shell_command.rs

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shell_serialization.rs

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shell_snapshot.rs

Route apply_patch through the environment filesystem (#17674)

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skill_approval.rs

core: remove special execve handling for skill scripts (#15812)

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skills.rs

Make skill loading filesystem-aware (#17720)

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spawn_agent_description.rs

[codex] prefer inherited spawn agent model (#18701)

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sqlite_state.rs

feat: config aliases (#18140)

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stream_error_allows_next_turn.rs

Forward app-server turn clientMetadata to Responses (#16009)

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stream_no_completed.rs

Forward app-server turn clientMetadata to Responses (#16009)

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subagent_notifications.rs

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tool_harness.rs

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tool_parallelism.rs

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tool_suggest.rs

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tools.rs

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truncation.rs

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turn_state.rs

Stabilize websocket response.failed error delivery (#14017)

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undo.rs

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unified_exec.rs

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unstable_features_warning.rs

core: remove cross-crate re-exports from lib.rs (#16512)

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user_notification.rs

Forward app-server turn clientMetadata to Responses (#16009)

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user_shell_cmd.rs

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view_image.rs

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web_search.rs

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websocket_fallback.rs

remove temporary ownership re-exports (#16626)

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window_headers.rs

Forward app-server turn clientMetadata to Responses (#16009)

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