Warn when a choice question has only one option

[AlexVelezLl]

Summary

• Single choice and multiple select questions with only one option now show a warning, since this is often an authoring mistake, while still being valid because one-option questions have legitimate uses (e.g. "check to confirm…")
• The warning only shows when the question has no validation errors, so it doesn't pile on top of required-field messages

References

Closes #6167

Reviewer guidance

• In an exercise, create a Single choice question with a prompt and one option marked correct → the warning shows above the answers and the question isn't marked incomplete
• Leave the prompt empty or the option blank → only the errors show, not the warning
• Add a second option → the warning goes away
• Repeat with Multiple select

AI usage

I used Claude Code to implement the warning and tests from the decision in the issue thread, survey existing warning styles across Studio/Kolibri/KDS, and pick the callout style. I reviewed the changes, asked for the warning to be hidden while errors are shown, and had the tests reworked so each one fails when its condition is removed.

🤖 Generated with Claude Code

[rtibblesbot]

🟡 Waiting for changes

Last updated: 2026-10-09 19:23 UTC

[rtibblesbot]

PR #6310 matches the issue's decision: one-option single choice and multiple select warn rather than block. Ordering is unchanged.

CI passes. Manual QA passed for single choice, multiple select, add/delete transitions, warning vs. error stacking, type switching, view mode, every editor's error rendering, and RTL/narrow widths. No new axe violations.

• blocking: --palette-gray-v800 is undefined (inline).
• suggestion: warning icon contrast (inline).
• suggestion: live region announcement (inline).
• suggestion: test assertions match on text alone (inline).

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Written by rtibblesbot, an LLM-based coding agent.

[rtibblesbot]

PR #6310: manual QA found one new blocking issue. Icon contrast is still open. The other 3 prior findings are resolved.

CI passes. Axe found no new violations.

• blocking: the warning isn't announced when it replaces an error (inline).
• suggestion: the drag-sort order announcement overwrites the warning (inline).
• suggestion: icon contrast is still under 3:1 (inline).

Prior-finding status

RESOLVED — ValidationMessage/index.vue:77 — --palette-gray-v800 doesn't exist
UNADDRESSED — ValidationMessage/index.vue:11 — warning icon contrast below 3:1
RESOLVED — ValidationMessage/index.vue:41 — screen readers may not announce the warning
RESOLVED — choice/tests/Editor.spec.js:488 — assertions would pass if rendered as an error

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Written by rtibblesbot, an LLM-based coding agent.

[rtibblesbot]

PR #6310: the single choice warning is still overwritten when an option is deleted down to one (blocking, see inline). The other 5 prior findings are resolved or acknowledged.

CI pending. Manual QA: the warning renders correctly in every scenario. It is announced on toggling the correct answer and on opening a saved item.

Prior-finding status

RESOLVED — ValidationMessage/index.vue — --palette-gray-v800 doesn't exist
ACKNOWLEDGED — ValidationMessage/index.vue:11 — warning icon contrast under 3:1
RESOLVED — ValidationMessage/index.vue — screen readers may not announce this warning
RESOLVED — Editor.spec.js:490 — assertions would pass if rendered as an error
RESOLVED — ValidationMessage/index.vue — warning never announced when the last error is cleared
UNADDRESSED — ValidationMessage/index.vue:46 — warning lost when an option is deleted

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Written by rtibblesbot, an LLM-based coding agent.

[rtibblesbot]

PR #6310: no new findings. All 8 prior findings are resolved or acknowledged. CI passes. Manual QA passed.

Prior-finding status

RESOLVED — ValidationMessage/index.vue — --palette-gray-v800 doesn't exist
ACKNOWLEDGED — ValidationMessage/index.vue — warning icon contrast ~1.4:1
RESOLVED — ValidationMessage/index.vue — screen readers may not announce the warning
RESOLVED — choice/tests/Editor.spec.js:501 — assertions would pass if rendered as an error
RESOLVED — ValidationMessage/index.vue — warning not announced when "Choose a correct answer" is the last error cleared
RESOLVED — ValidationMessage/index.vue:43 — warning lost when an option is deleted with its Delete button
ACKNOWLEDGED — ValidationMessage/index.vue:11 — warning icon contrast still under 3:1 (maintainer accepted trade-off)
RESOLVED — ValidationMessage/index.vue — drag-sort order announcement overwrites the warning on delete

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Written by rtibblesbot, an LLM-based coding agent.