feat: experimental inline buffer chat (#142)

This PR is the begining of a very experimental inline buffer chats aimed a quick edits.

You can start a quick chat with the default keymap <leader>o/ and enter a small edit to make.

This is still experimental and would like to gather feedbacks

Author: sudo-tee

README.md

@@ -3,6 +3,7 @@ local util = require('opencode.util')
 local session = require('opencode.session')
 local config_file = require('opencode.config_file')
 local state = require('opencode.state')
+local quick_chat = require('opencode.quick_chat')
 
 local input_window = require('opencode.ui.input_window')
 local ui = require('opencode.ui.ui')
@@ -59,6 +60,8 @@ M.toggle = Promise.async(function(new_session)
   end
 end)
 
+---@param new_session boolean?
+---@return nil
 function M.toggle_focus(new_session)
   if not ui.is_opencode_focused() then
     local focus = state.last_focused_opencode_window or 'input' ---@cast focus 'input' | 'output'
@@ -107,6 +110,39 @@ function M.select_history()
   require('opencode.ui.history_picker').pick()
 end
 
+function M.quick_chat(message, range)
+  if not range then
+    if vim.fn.mode():match('[vV\022]') then
+      local visual_range = util.get_visual_range()
+      if visual_range then
+        range = {
+          start = visual_range.start_line,
+          stop = visual_range.end_line,
+        }
+      end
+    end
+  end
+
+  if type(message) == 'table' then
+    message = table.concat(message, ' ')
+  end
+
+  if not message or #message == 0 then
+    local scope = range and ('[selection: ' .. range.start .. '-' .. range.stop .. ']')
+      or '[line: ' .. tostring(vim.api.nvim_win_get_cursor(0)[1]) .. ']'
+    vim.ui.input({ prompt = 'Quick Chat Message: ' .. scope, win = { relative = 'cursor' } }, function(input)
+      if input and input ~= '' then
+        local prompt, ctx = util.parse_quick_context_args(input)
+        quick_chat.quick_chat(prompt, { context_config = ctx }, range)
+      end
+    end)
+    return
+  end
+
+  local prompt, ctx = util.parse_quick_context_args(message)
+  quick_chat.quick_chat(prompt, { context_config = ctx }, range)
+end
+
 function M.toggle_pane()
   return core.open({ new_session = false, focus = 'output' }):and_then(function()
     ui.toggle_pane()
@@ -970,6 +1006,14 @@ M.commands = {
     fn = M.toggle_zoom,
   },
 
+  quick_chat = {
+    desc = 'Quick chat with current buffer or visual selection',
+    fn = M.quick_chat,
+    range = true, -- Enable range support for visual selections
+    nargs = '+', -- Allow multiple arguments
+    complete = false, -- No completion for custom messages
+  },
+
   swap = {
     desc = 'Swap pane position left/right',
     fn = M.swap_position,
@@ -1011,7 +1055,7 @@ M.commands = {
         local title = table.concat(vim.list_slice(args, 2), ' ')
         M.rename_session(state.active_session, title)
       else
-        local valid_subcmds = table.concat(M.commands.session.completions, ', ')
+        local valid_subcmds = table.concat(M.commands.session.completions or {}, ', ')
         vim.notify('Invalid session subcommand. Use: ' .. valid_subcmds, vim.log.levels.ERROR)
       end
     end,
@@ -1041,7 +1085,7 @@ M.commands = {
       elseif subcmd == 'close' then
         M.diff_close()
       else
-        local valid_subcmds = table.concat(M.commands.diff.completions, ', ')
+        local valid_subcmds = table.concat(M.commands.diff.completions or {}, ', ')
         vim.notify('Invalid diff subcommand. Use: ' .. valid_subcmds, vim.log.levels.ERROR)
       end
     end,
@@ -1120,7 +1164,7 @@ M.commands = {
       elseif subcmd == 'select' then
         M.select_agent()
       else
-        local valid_subcmds = table.concat(M.commands.agent.completions, ', ')
+        local valid_subcmds = table.concat(M.commands.agent.completions or {}, ', ')
         vim.notify('Invalid agent subcommand. Use: ' .. valid_subcmds, vim.log.levels.ERROR)
       end
     end,
@@ -1208,7 +1252,7 @@ M.commands = {
       elseif subcmd == 'deny' then
         M.permission_deny()
       else
-        local valid_subcmds = table.concat(M.commands.permission.completions, ', ')
+        local valid_subcmds = table.concat(M.commands.permission.completions or {}, ', ')
         vim.notify('Invalid permission subcommand. Use: ' .. valid_subcmds, vim.log.levels.ERROR)
       end
     end,
@@ -1309,6 +1353,14 @@ M.legacy_command_map = {
 
 function M.route_command(opts)
   local args = vim.split(opts.args or '', '%s+', { trimempty = true })
+  local range = nil
+
+  if opts.range and opts.range > 0 then
+    range = {
+      start = opts.line1,
+      stop = opts.line2,
+    }
+  end
 
   if #args == 0 then
     M.toggle()
@@ -1319,7 +1371,7 @@ function M.route_command(opts)
   local subcmd_def = M.commands[subcommand]
 
   if subcmd_def and subcmd_def.fn then
-    subcmd_def.fn(vim.list_slice(args, 2))
+    subcmd_def.fn(vim.list_slice(args, 2), range)
   else
     vim.notify('Unknown subcommand: ' .. subcommand, vim.log.levels.ERROR)
   end
@@ -1413,6 +1465,7 @@ function M.setup()
   vim.api.nvim_create_user_command('Opencode', M.route_command, {
     desc = 'Opencode.nvim main command with nested subcommands',
     nargs = '*',
+    range = true, -- Enable range support
     complete = M.complete_command,
   })
 

lua/opencode/api.lua

@@ -43,6 +43,7 @@ M.defaults = {
       ['<leader>oPd'] = { 'permission_deny', desc = 'Deny permission' },
       ['<leader>otr'] = { 'toggle_reasoning_output', desc = 'Toggle reasoning output' },
       ['<leader>ott'] = { 'toggle_tool_output', desc = 'Toggle tool output' },
+      ['<leader>o/'] = { 'quick_chat', desc = 'Quick chat with current context', mode = { 'n', 'x' } },
     },
     output_window = {
       ['<esc>'] = { 'close' },
@@ -94,6 +95,9 @@ M.defaults = {
       delete_entry = { '<C-d>', mode = { 'i', 'n' } },
       clear_all = { '<C-X>', mode = { 'i', 'n' } },
     },
+    quick_chat = {
+      cancel = { '<C-c>', mode = { 'i', 'n' } },
+    },
   },
   ui = {
     position = 'right',
@@ -170,12 +174,14 @@ M.defaults = {
     enabled = true,
     cursor_data = {
       enabled = false,
+      context_lines = 5, -- Number of lines before and after cursor to include in context
     },
     diagnostics = {
       enabled = true,
       info = false,
       warning = true,
       error = true,
+      only_closest = false, -- If true, only diagnostics for cursor/selection
     },
     current_file = {
       enabled = true,
@@ -191,11 +197,21 @@ M.defaults = {
     agents = {
       enabled = true,
     },
+    buffer = {
+      enabled = false, -- Disable entire buffer context by default, only used in quick chat
+    },
+    git_diff = {
+      enabled = false,
+    },
   },
   debug = {
     enabled = false,
     capture_streamed_events = false,
     show_ids = true,
+    quick_chat = {
+      keep_session = false,
+      set_active_session = false,
+    },
   },
   prompt_guard = nil,
   hooks = {
@@ -204,22 +220,15 @@ M.defaults = {
     on_done_thinking = nil,
     on_permission_requested = nil,
   },
+  quick_chat = {
+    default_model = nil,
+    default_agent = nil,
+    instructions = nil, -- Use instructions prompt by default
+  },
 }
 
 M.values = vim.deepcopy(M.defaults)
 
----Get function names from keymap config, used when normalizing legacy config
----@param keymap_config table
-local function get_function_names(keymap_config)
-  local names = {}
-  for _, config in pairs(keymap_config) do
-    if type(config) == 'table' and config[1] then
-      table.insert(names, config[1])
-    end
-  end
-  return names
-end
-
 local function update_keymap_prefix(prefix, default_prefix)
   if prefix == default_prefix or not prefix then
     return