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Addresses https://github.com/openai/codex/issues/11013 ## Summary - add a Plan implementation path in the TUI that lets users choose reasoning before switching to Default mode and implementing - add Plan-mode reasoning scope handling (Plan-only override vs all-modes default), including config/schema/docs plumbing for `plan_mode_reasoning_effort` - remove the hardcoded Plan preset medium default and make the reasoning popup reflect the active Plan override as `(current)` - split the collaboration-mode switch notification UI hint into #12307 to keep this diff focused If I have `plan_mode_reasoning_effort = "medium"` set in my `config.toml`: <img width="699" height="127" alt="Screenshot 2026-02-20 at 6 59 37 PM" src="https://github.com/user-attachments/assets/b33abf04-6b7a-49ed-b2e9-d24b99795369" /> If I don't have `plan_mode_reasoning_effort` set in my `config.toml`: <img width="704" height="129" alt="Screenshot 2026-02-20 at 7 01 51 PM" src="https://github.com/user-attachments/assets/88a086d4-d2f1-49c7-8be4-f6f0c0fa1b8d" /> ## Codex author `codex resume 019c78a2-726b-7fe3-adac-3fa4523dcc2a`
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Configuration
For basic configuration instructions, see this documentation.
For advanced configuration instructions, see this documentation.
For a full configuration reference, see this documentation.
Connecting to MCP servers
Codex can connect to MCP servers configured in ~/.codex/config.toml. See the configuration reference for the latest MCP server options:
Apps (Connectors)
Use $ in the composer to insert a ChatGPT connector; the popover lists accessible
apps. The /apps command lists available and installed apps. Connected apps appear first
and are labeled as connected; others are marked as can be installed.
Notify
Codex can run a notification hook when the agent finishes a turn. See the configuration reference for the latest notification settings:
JSON Schema
The generated JSON Schema for config.toml lives at codex-rs/core/config.schema.json.
Notices
Codex stores "do not show again" flags for some UI prompts under the [notice] table.
Plan mode defaults
plan_mode_reasoning_effort lets you set a Plan-mode-specific default reasoning
effort override. When unset, Plan mode uses the built-in Plan preset default
(currently medium). When explicitly set (including none), it overrides the
Plan preset. The string value none means "no reasoning" (an explicit Plan
override), not "inherit the global default". There is currently no separate
config value for "follow the global default in Plan mode".
Ctrl+C/Ctrl+D quitting uses a ~1 second double-press hint (ctrl + c again to quit).