feat(config): add preferred_model configuration option

Add support for highlighting and sorting a preferred model to the top of the provider list.
Users can now set preferred_model in config to specify their preferred provider/model combination (e.g., 'github-copilot/claude-sonnet-4'), which will be visually marked and sorted to the top of the model selection list.

Author: sudo-tee

README.md

@@ -109,6 +109,7 @@ Install the plugin with your favorite package manager. See the [Configuration](#
 require('opencode').setup({
   preferred_picker = nil, -- 'telescope', 'fzf', 'mini.pick', 'snacks', 'select', if nil, it will use the best available picker. Note mini.pick does not support multiple selections
   preferred_completion = nil, -- 'blink', 'nvim-cmp','vim_complete' if nil, it will use the best available completion
+  preferred_model = nil, -- 'provider/model' (e.g., 'github-copilot/claude-sonnet-4') to highlight and sort to top of provider list
   default_global_keymaps = true, -- If false, disables all default global keymaps
   default_mode = 'build', -- 'build' or 'plan' or any custom configured. @see [OpenCode Agents](https://opencode.ai/docs/modes/)
   keymap_prefix = '<leader>o', -- Default keymap prefix for global keymaps change to your preferred prefix and it will be applied to all keymaps starting with <leader>o

lua/opencode/config.lua

@@ -8,6 +8,7 @@ local M = {}
 M.defaults = {
   preferred_picker = nil,
   preferred_completion = nil,
+  preferred_model = nil,
   default_global_keymaps = true,
   default_mode = 'build',
   legacy_commands = true,

lua/opencode/provider.lua

@@ -8,16 +8,37 @@ function M._get_models()
     return {}
   end
 
+  local config = require('opencode.config')
+  local icons = require('opencode.ui.icons')
+  local preferred_model = config.values.preferred_model
+  local preferred_icon = icons.get('preferred')
+
   local models = {}
   for _, provider in ipairs(response.providers) do
     for _, model in pairs(provider.models) do
+      local model_id = provider.id .. '/' .. model.id
+      local is_preferred = preferred_model and model_id == preferred_model
+
       table.insert(models, {
         provider = provider.id,
         model = model.id,
-        display = provider.name .. ': ' .. model.name,
+        display = (is_preferred and preferred_icon or '') .. provider.name .. ': ' .. model.name,
+        is_preferred = is_preferred,
       })
     end
   end
+
+  -- Sort models: preferred first, then alphabetically
+  table.sort(models, function(a, b)
+    if a.is_preferred and not b.is_preferred then
+      return true
+    elseif not a.is_preferred and b.is_preferred then
+      return false
+    else
+      return a.display < b.display
+    end
+  end)
+
   return models
 end
 

lua/opencode/ui/icons.lua

@@ -7,41 +7,42 @@ local presets = {
   nerdfonts = {
     -- headers
     header_user = '▌󰭻 ',
-    header_assistant = ' ',
+    header_assistant = ' ',
     -- actions/tools
-    run = ' ',
-    task = ' ',
-    read = ' ',
-    edit = ' ',
-    write = ' ',
+    run = ' ',
+    task = ' ',
+    read = ' ',
+    edit = ' ',
+    write = ' ',
     plan = '󰝖 ',
-    search = ' ',
+    search = ' ',
     web = '󰖟 ',
-    list = ' ',
-    tool = ' ',
+    list = ' ',
+    tool = ' ',
     snapshot = '󰻛 ',
     restore_point = '󱗚 ',
-    file = ' ',
-    folder = ' ',
+    file = ' ',
+    folder = ' ',
     attached_file = '󰌷 ',
     agent = '󰚩 ',
-    reference = ' ',
+    reference = ' ',
     reasoning = '󰧑 ',
-    question = '',
+    question = '',
+    preferred = ' ',
     -- statuses
-    status_on = ' ',
-    status_off = ' ',
-    guard_on = ' ',
+    status_on = ' ',
+    status_off = ' ',
+    guard_on = ' ',
     -- borders and misc
     border = '▌',
     -- context bar
     cursor_data = '󰗧 ',
-    error = ' ',
-    warning = ' ',
-    info = ' ',
-    filter = '/',
+    error = ' ',
+    warning = ' ',
+    info = ' ',
+    filter = '/',
     selection = '󰫙 ',
-    command = ' ',
+    command = ' ',
   },
   text = {
     -- headers
@@ -66,6 +67,7 @@ local presets = {
     agent = '@',
     reference = '@',
     question = '?',
+    preferred = '*',
     -- statuses
     status_on = 'ON',
     status_off = 'OFF',