Repository navigation
ACP: let hosts answer ask_user and exit_plan_mode #24663
Description
ACP needs a host-answerable input request for ask_user and exit_plan_mode.
Right now ACP can start sessions, resume them, send prompts, cancel turns, and handle permission flows. But if Gemini CLI needs structured user input, ACP does not give the host a way to answer it. That forces the flow back into the terminal UI.
That is the gap I need closed.
I want Gemini CLI in ACP mode to work like the other controller boundaries I already use:
- Codex app-server
- Claude Agent SDK
The host should be able to:
- receive the input request
- show it in its own UI
- send the answer back
- continue the same turn
Relevant ACP work I checked first:
- feat(cli): conditionally exclude ask_user tool in ACP mode #23045
- ACP: no tool_call session update before request_permission #21783
- ACP mode tool confirmations are delayed by ~30s due to MessageBus timeout #17952
- fix(acp): Update allow approval policy flow for ACP clients to fix config persistence and compatible with TUI #23818
- feat(acp): Implemented the structured terminal lifecycle for ACP. #23961
- Gemini CLI in ACP mode prompts for login when launched from Python, but not from terminal #12042
This PR is the narrow fix for that gap: #24664
What it adds:
- an opt-in ACP extension:
gemini/requestUserInput - host-answerable handling for
ask_user - host-answerable handling for
exit_plan_mode ask_userstays disabled in ACP unless the host explicitly opts in- per-kind support so a host can enable only
exit_plan_modeif it wants
What it does not do:
- add MCP
- add a second app-server
- turn
ask_userback on globally in ACP
Activity
[-]feat(acp): support host input requests for ask_user and exit_plan_mode[/-][+]ACP: let hosts answer ask_user and exit_plan_mode[/+][-]ACP: let hosts answer ask_user and exit_plan_mode[/-][+]feat(acp): support host input requests for ask_user and exit_plan_mode[/+][-]feat(acp): support host input requests for ask_user and exit_plan_mode[/-][+]ACP: let hosts answer ask_user and exit_plan_mode[/+]Adib234 commentedon May 8, 2026
Thank you for bringing this to our attention. Right now, our engineering team is focusing all resources on critical system maintenance and core stability. Because of this, we don't have immediate plans to address this specific issue, but we truly appreciate you flagging it for us.