Clarify With Questionnaire

Clarify with questionnaire

The questionnaire tool pauses the turn and opens a full-screen TUI: a tab bar of questions plus a Submit tab, each question rendering radio options (single), checkboxes (multi), or a free-text editor (free). It returns both a human-readable answer block and structured details.answers. It is the right way to ask when a decision is the user's to make - and the wrong way to offload choices you should make yourself. This skill is the policy for ask-vs-infer and for phrasing questions the user can answer in one keystroke.

When to use this skill

Ask with questionnaire when ALL of these hold:

• The answer is genuinely the user's call - a product preference, a scope decision, a trade-off only they can weigh (budget, risk tolerance, which of two valid designs).
• You cannot resolve it from the request, the code, or a sensible default. If reading a file or git log settles it, do that instead.
• A wrong guess is costly - hard to undo, or it would send you down a long path the user did not want.

Infer and proceed (do NOT ask) when:

• The code or repo answers it. Read it. Asking what you could grep wastes the user's attention.
• There is an obvious default. Pick it, state the assumption in your reply, and move on. "I used X; say the word if you'd rather Y" beats a blocking dialog.
• The choice is reversible and cheap. Just do it; course-correct if the user objects.
• You are asking to cover yourself, not because the answer changes what you do next.

The bar: ask only when the answer changes your next action and you genuinely cannot supply it yourself.

Workflow

1. Confirm the question is worth a tool call. Run it past the ask-vs-infer test above. One sharp question beats three reflexive ones.
2. Pick the kind per question:
   • single - mutually-exclusive choice. Pressing a digit 1-9 or Enter selects and auto-advances. Default kind.
   • multi - independent options that can combine. Requires Space to toggle; set minSelect / maxSelect to bound the selection.
   • free - no good closed option set; drops the user straight into an editor.
3. Write the prompt and options:
   • Make single options truly mutually exclusive - if two could both be chosen, it is a multi.
   • Give each option a short label and, when the trade-off is not obvious, a description sub-line.
   • Lead with your recommended option when you have one, and say so in its label or description.
   • Use preview (multi-line ASCII / code / diff) when the user needs to compare concrete artifacts side by side; the pane renders beside the option on wide terminals.
4. Keep allowOther and allowNotes on (both default true) so the user can type a custom answer or annotate - you rarely enumerate every option perfectly.
5. Read the structured answer. details.answers carries value / label / index for single, values[] / labels[] / indices[] for multi, and customText + wasCustom when the user picked Type something.. Branch on the structured fields, not the prose.
6. Handle the escape hatches. c ("Chat about this") returns chatRequested: true with the question id - continue in prose instead of forcing the form. A cancel sets details.cancelled. If ctx.hasUI is false the tool errors and asks you to put the question in chat - so in headless runs, just ask inline.

Phrasing options well

• One axis per question. Do not fold "which approach AND which scope" into one option list - split into two questions (separate tabs).
• Exhaustive within reason. Cover the realistic answers; allowOther catches the rest. Do not pad with near-duplicates.
• No leading or loaded labels unless you are explicitly recommending - then mark the recommendation openly.
• multi needs a clear floor. Set minSelect: 1 if at least one choice is mandatory, so the user cannot submit an empty selection.

Common pitfalls

• Asking what you could read. The most common misuse. Grep first.
• single options that overlap. The user cannot express "both" - that is a multi.
• Stacking questions to seem thorough. Each question is a context switch for the user. Ask the few that matter.
• Ignoring wasCustom. A custom Type something. answer will not match any option value - check wasCustom / customText before assuming the answer is one of your options.
• Forgetting minSelect on a mandatory multi. Without it the user can submit nothing checked.
• Blocking in a headless session. No UI means the tool errors - ask in prose when ctx.hasUI is false.

Related docs

• questionnaire.md - full tool reference: question kinds, per-option fields, answer shapes, TUI keybindings.
• deep-research-when - clarify scope with this tool before launching an expensive research run.