model_providers.<id>.env_key: env var for provider API key. model_providers.<id>

model_providers.<id>.stream_idle_timeout_ms: SSE idle timeout.

model_providers.<id>.supports_websockets: whether Responses WebSocket transport is supported.

features.codex_hooks: under-development lifecycle hooks.

features.shell_tool: enable shell tool; stable and on by default.

features.enable_request_compression: zstd-compress streaming request bodies; stable and on by default.

features.skill_mcp_dependency_install: prompt/install missing MCP deps for skills; stable and on by default.

features.fast_mode: enables Fast mode selection; stable and on by default.

features.smart_approvals: experimental guardian-reviewer approval routing.

features.web_search: deprecated old toggle; prefer web_search.

features.web_search_cached: deprecated old toggle mapping to cached mode.

features.web_search_request: deprecated old toggle mapping to live mode.

experimental_use_unified_exec_tool: deprecated legacy alias for unified exec.

suppress_unstable_features_warning: hide warning when under-development features are enabled.

shell_environment_policy.inherit: baseline env inheritance, all | core | none.

shell_environment_policy.ignore_default_excludes: keep KEY/SECRET/TOKEN vars before filtering.