Model switch

[arkml]

Summary of Changes: Model Selector & Multi-Model Support

1. packages/shared/src/models.ts (+1 line)

Schema change: Added models: z.array(z.string()).optional() to LlmModelConfig. This allows storing a
list of configured models per provider alongside the single active model field. The field is optional
for backward compatibility.

2. packages/core/src/models/repo.ts (+22/-5 lines)

Persistence change:

• setConfig() now saves the models array into the provider entry in the providers map
• Spreads existing provider fields (...existingProviders[flavor]) before overwriting, so unknown fields
  aren't lost when saving

3. apps/renderer/src/components/settings-dialog.tsx (+324/-88 lines)

Multi-model support in Settings:

• State changed from single model: string to models: string[] per provider
• Added updateModelAt(), addModel(), removeModel() helpers for managing the array
• UI shows a list of model inputs/selects with an X button (overlay on hover) to remove each, and an +
  Add assistant model button to add more
• Assistant model and Knowledge graph model displayed as equal-width side-by-side columns
• "Test & Save" sends the full models array; tests against the first (default) model

Default provider management:

• Added defaultProvider state, set from disk on load and updated on save
• Provider cards show a "Default" pill badge on the current default
• Non-default configured providers show "Set as default" link (calls models:saveConfig with that
  provider's config)
• "Set as default" link appears alongside a "Remove" link

Provider deletion:

• "Remove" link on non-default configured provider cards
• handleDeleteProvider() reads models.json, deletes the provider from the providers map, and if the
  deleted provider was the top-level active one, rewrites the top-level config to point to the current
  default provider
• Load logic no longer re-hydrates a provider from top-level config if it was deleted from the providers
  map

Cross-component sync:

• All config-modifying actions (handleTestAndSave, handleSetDefault, handleDeleteProvider) dispatch a
  models-config-changed custom window event

4. apps/renderer/src/components/chat-input-with-mentions.tsx (+190/-12 lines)

Model selector dropdown in chat input:

• New imports: ChevronDown icon, DropdownMenu components
• providerDisplayNames map and ConfiguredModel interface
• On mount/activation, reads config/models.json and builds a flat list of all configured models across
  all providers (reading models array, falling back to single model)
• Dropdown uses DropdownMenuRadioGroup showing each model with its provider name

Layout:

• Two-row layout: textarea on top, toolbar below
• Toolbar: [+ attach] on left, [Model ▾] and [send] on right (matching the design screenshot)

Default model ordering:

• Models are sorted so the default provider's default model appears first in the dropdown

Model switching:

• handleModelChange calls models:saveConfig with the selected model AND preserves the full models array
  for that provider (preventing the array from being wiped)

Live sync with Settings:

• Listens for models-config-changed window event to reload the model list immediately when settings
  change (add/remove/default)

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Project	Deployment	Actions	Updated (UTC)
rowboat	Ready	Preview, Comment	Feb 27, 2026 6:42pm