feat: use custom kinds

Author: sudo-tee

lua/opencode/lsp/opencode_completion_ls.lua

@@ -60,10 +60,26 @@ local function get_completion_context(params)
   return word, trigger_char, line
 end
 
-local function supports_kind_icons()
-  -- only blink.cmp supports kind icons currently, so we check for its presence
-  local has_blink_cmp = pcall(require, 'blink.cmp')
-  return has_blink_cmp
+local function ensure_custom_kind(source_name, kind_icon)
+  -- Start custom kinds from 100 to avoid conflicting with standard LSP kinds (1-25)
+  local KIND_OFFSET = 100
+  local kind_name = 'Opencode' .. (source_name:gsub('^%l', string.upper))
+
+  -- If we haven't registered this custom kind yet
+  if not vim.lsp.protocol.CompletionItemKind[kind_name] then
+    -- Find the next available integer ID
+    local next_id = KIND_OFFSET
+    while vim.lsp.protocol.CompletionItemKind[next_id] do
+      next_id = next_id + 1
+    end
+
+    -- Register both string->int and int->string mappings
+    vim.lsp.protocol.CompletionItemKind[kind_name] = next_id
+    -- The completion UI will display this exact string in the "Kind" column
+    vim.lsp.protocol.CompletionItemKind[next_id] = (kind_icon and kind_icon .. ' ' or '') .. kind_name
+  end
+
+  return vim.lsp.protocol.CompletionItemKind[kind_name]
 end
 
 ---Convert opencode CompletionItem to LSP CompletionItem
@@ -72,11 +88,12 @@ end
 ---@return lsp.CompletionItem
 local function to_lsp_item(item, index)
   local source = require('opencode.ui.completion').get_source_by_name(item.source_name)
+  local custom_kind = ensure_custom_kind(item.source_name, item.kind_icon)
 
   local lsp_item = {
-    label = (supports_kind_icons() and '' or (item.kind_icon .. ' ')) .. item.label,
-    kind = vim.lsp.protocol.CompletionItemKind.Text,
-    kind_icon = supports_kind_icons() and item.kind_icon or nil, -- Only include kind_icon if supported
+    label = item.label,
+    kind = custom_kind,
+    kind_icon = item.kind_icon, -- Keep for plugins that read custom fields (like blink.cmp)
     kind_hl = item.kind_hl,
     detail = item.detail,
     documentation = item.documentation and {