kandev/docs/plans/no-silent-model-fallback/task-06-profile-editor.md

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id: task-06-profile-editor title: Profile editor: gone start model red + fallback row + toggle status: done wave: 3 depends_on: [task-01-profile-fields, task-05-picker-gone-support] plan: docs/plans/no-silent-model-fallback/plan.md spec: docs/specs/agents/requirements/no-silent-model-fallback.md

Task 6 — Profile editor rows

Change

apps/web/components/settings/profile-form-fields.tsx (CapabilitiesRow / ModelPicker):

• Start model: when profile.model is non-empty and absent from the current model list, keep it as the current value, render the trigger/row red (text-destructive) and the option disabled with reason ("no longer available — select a new model"). The user can still change it (the picker opens and valid models are selectable), but cannot re-select the gone one.
• Agent fallback row (new, directly under Start model): optional select over the same model list bound to profile.fallback_model, label "Agent fallback" + helper ("if the start model becomes unavailable, automatically switch to"). Same gone-red/disabled treatment when the fallback model itself is gone. Hidden when auto_fallback is ON.
• "Fallback automatically to next model" toggle (new row): switch bound to profile.auto_fallback with helper text. When ON, the fallback-model row is hidden (per spec precedence).
• Parity: apps/web/components/agent/cli-profile-editor.tsx (ModelModeFields) gets the same two rows.
• The profile form state type (ProfileFormData) gains fallbackModel / autoFallback; dirty-tracking (profileModelIsDirty-style helpers) for the new fields; save payload flows through toAgentProfilePayload.

i18n: ALL new copy via t() into apps/web/src/locales/{en,pseudo}/settings.json (camelCase keys): startModelUnavailable, agentFallback, agentFallbackHelper, autoFallback, autoFallbackHelper, fallbackModelUnavailable. The file profile-form-fields.tsx is unmigrated — added lines are judged by the ratchet, so no hardcoded literals on new/edited lines.

Acceptance

1. Unit test: gone start model renders the red treatment + disabled option; current value preserved.
2. Unit test: fallback row appears when auto_fallback is off; hidden when on; toggle hides/shows it.
3. Unit test: gone fallback model renders red + disabled.
4. Unit test: save payload includes fallback_model / auto_fallback; dirty detection works for both.
5. i18n ratchet passes on the edited files.

Verification

cd apps/web && pnpm vitest run components/settings/profile-form-fields.test.tsx
cd apps/web && pnpm run typecheck
cd apps/web && pnpm run i18n:ratchet

Risks

• The editor has two surfaces (profile-form-fields.tsx and cli-profile-editor.tsx) — keep both consistent.
• The empty-model case ("profile model means use the agent's default") must stay untouched: gone-treatment applies only to non-empty models.
• Do not disturb the data-settings-dirty container semantics used by the settings save indicator.