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## Summary Adds a first-party `ask_user` tool to Zed's native agent (`crates/agent`) that lets the agent ask the user a question and get an answer back through a proper **elicitation form** rather than free-form chat text. This is a step towards the interactive-question experience requested in [discussion #48784](https://github.com/zed-industries/zed/discussions/48784) (implement the ACP elicitation spec for agent questions). Zed already renders elicitation forms client-side; this wires the native agent up to that existing rail so the agent can drive single-select and/or free-text prompts. ## What it does The tool takes: - `question` — the prompt shown to the user - `options` — optional list of selectable choices (single-select) - `allow_free_text` — whether the user may type a custom answer instead of picking an option The agent decides the shape of each question: | `options` | `allow_free_text` | Result | | --- | --- | --- | | 2+ | `false` | Single-select only | | 2+ | `true` | Single-select with a free-text "other" field | | empty | `true` | Free-text only | A typed answer takes precedence over a selected option, and the tool always resolves (a cancelled or failed elicitation is reported back to the agent rather than hanging). ## Demo https://github.com/user-attachments/assets/9d438d87-af65-4fa2-b500-b1232007d0a0 ## Implementation - `thread.rs` — new `ThreadEvent::Elicitation(ElicitationRequest)` variant plus `ToolCallEventStream::request_elicitation`, mirroring the existing `prompt_for_decision` permission rail. - `agent.rs` — handles the elicitation event by building a session-scoped `acp::CreateElicitationRequest` and routing it through `AcpThread::request_elicitation`, piping the response back to the tool. - `tools/ask_user_tool.rs` — the tool itself, including schema construction and response extraction. - Registered in the `write` and `ask` profiles and excluded from the tool-permissions setup UI. No client-side UI changes were needed — the existing elicitation form rendering handles it. ## Tests `cargo test -p agent ask_user` — 5 unit tests covering schema construction, validation, and accept/decline/cancel handling. Release Notes: - Added an `ask_user` tool that lets the agent ask the user a question with selectable options and/or free-text input, rendered as an elicitation form |
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