kandev/docs/plans/unique-model-variation-fallback/task-02-frontend-advisory.md

id, title, status, wave, depends_on, plan, requirements, acceptance_criteria, system_design

id	title	status	wave	depends_on	plan	requirements	acceptance_criteria	system_design
02-frontend-advisory	Present variation decisions	done	2	01-runtime-resolution	plan.md	REQ-AGENTS-NO-SILENT-MODEL-FALLBACK-002	AC-AGENTS-NO-SILENT-MODEL-FALLBACK-002.3 AC-AGENTS-NO-SILENT-MODEL-FALLBACK-002.4 AC-AGENTS-NO-SILENT-MODEL-FALLBACK-002.5 AC-AGENTS-NO-SILENT-MODEL-FALLBACK-002.6 AC-AGENTS-NO-SILENT-MODEL-FALLBACK-002.7	../../specs/agents/system-design/no-silent-model-fallback-01.md

Task 02: Present Variation Decisions

Summary

Present one host variation as an advisory and render the runtime decision in task chat. Keep the host probe non-authoritative on every viewport.

In scope

• Add the mirrored frontend matcher and table tests.
• Update task-create and profile-editor missing-model states.
• Render the new warning reason with requested and effective models.
• Add all required localized copy.

Out of scope

• Runtime model selection.
• New dialog, drawer, or navigation patterns.
• Changes to the saved profile model.

Acceptance

• One host variation names a possible target and keeps the profile selectable.
• Zero or multiple host variations keep the existing missing-model state.
• Desktop, keyboard, and touch users can reach the advisory and durable warning.

Verification

(
  cd apps
  pnpm --filter @kandev/web test -- --run components/task-create-dialog-options components/settings/profile-form-fields components/task/chat/messages/status-message lib/model-variation
  pnpm --filter @kandev/web lint
)
(
  cd apps/web
  pnpm run typecheck
  pnpm run i18n:check
  pnpm run i18n:ratchet
)
git diff --check

Files likely touched

• apps/web/lib/model-variation.ts
• apps/web/lib/model-variation.test.ts
• apps/web/components/task-create-dialog-options.tsx
• apps/web/components/task-create-dialog-options.test.tsx
• apps/web/components/settings/profile-model-fields.tsx
• apps/web/components/settings/profile-form-fields.test.tsx
• apps/web/components/task/chat/messages/status-message.tsx
• apps/web/components/task/chat/messages/status-message.test.tsx
• apps/web/src/locales/*/settings.json
• apps/web/src/locales/*/task.json

Dependencies

Task 01.

Risks

• Host preview text can sound authoritative when another executor can advertise a different catalog.
• Missing and resolvable states must be mutually exclusive in the profile row.

Parallelism

sequential

Inputs

• Task 01 warning reason and payload fields.
• Existing host warning tooltip, touch drawer, profile selector, and status message patterns.

Results

Added the mirrored structural matcher, host advisory states, and the task-chat warning reason while preserving the saved profile model. Added localized copy for all required catalogs and retained the existing desktop tooltip and mobile touch-drawer patterns. Focused frontend tests passed (51), typecheck and lint passed, and both i18n checks passed.