feat(config)!: modern keymap format + mode support (#52)

This is a complete overhaul of the keymaps, 

The old config should still work but with a warning for migration

The new format shoud now be:
```lua
 keymap = {
    editor = {
      ['<leader>og'] = { 'toggle' }, -- I don't think we really need to support just string, it makes things more complex for nothing
      ['<leader>oi'] = { 'open_input' },
      ['<leader>oI'] = { 'open_input_new_session' },
      ['<leader>oo'] = { 'open_output' },
      ['<leader>ot'] = { 'toggle_focus' },
      ['<leader>oq'] = { 'close' },
      ['<leader>os'] = { 'select_session' },
      ['<leader>op'] = { 'configure_provider' },
      ['<leader>od'] = { 'diff_open' },
      ['<leader>o]'] = { 'diff_next' },
      ['<leader>o['] = { 'diff_prev' },
      ['<leader>oc'] = { 'diff_close' },
      ['<leader>ora'] = { 'diff_revert_all_last_prompt' },
      ['<leader>ort'] = { 'diff_revert_this_last_prompt' },
      ['<leader>orA'] = { 'diff_revert_all' },
      ['<leader>orT'] = { 'diff_revert_this' },
      ['<leader>orr'] = { 'diff_restore_snapshot_file' },
      ['<leader>orR'] = { 'diff_restore_snapshot_all' },
      ['<leader>oC'] = { 'open_configuration_file' },
      ['<leader>ox'] = { 'swap_position' },
      ['<leader>opa'] = { 'permission_accept' },
      ['<leader>opA'] = { 'permission_accept_all' },
      ['<leader>opd'] = { 'permission_deny' },
    },
    output_window = {
      ['<leader>something'] = {function () 
                   -- custom code
      end},
      ['<esc>'] = { 'close' },
      ['<C-c>'] = { 'stop' },
      [']]'] = { 'next_message' },
      ['[['] = { 'prev_message' },
      ['<tab>'] = { 'toggle_pane', mode = { 'n', 'i' } },
      ['<C-i>'] = { 'focus_input' },
      ['<leader>oS'] = { 'select_child_session' },
      ['<leader>oD'] = { 'debug_message' },
      ['<leader>oO'] = { 'debug_output' },
      ['<leader>ods'] = { 'debug_session' },
    },
    input_window = {
      ['<cr>'] = { 'submit_input_prompt', mode = { 'n', 'i' } },
      ['<esc>'] = { 'close' },
      ['<C-c>'] = { 'stop' },
      ['~'] = { 'mention_file', mode = 'i' },
      ['@'] = { 'mention', mode = 'i' },
      ['/'] = { 'slash_commands', mode = 'i' },
      ['<tab>'] = { 'toggle_pane', mode = { 'n', 'i' } },
      ['<up>'] = { 'prev_prompt_history', mode = { 'n', 'i' } },
      ['<down>'] = { 'next_prompt_history', mode = { 'n', 'i' } },
      ['<M-m>'] = { 'switch_mode' },
      ['<leader>oS'] = { 'select_child_session' },
      ['<leader>oD'] = { 'debug_message' },
      ['<leader>oO'] = { 'debug_output' },
      ['<leader>ods'] = { 'debug_session' },
    },
    permission = {
      accept = 'a',
      accept_all = 'A',
      deny = 'd',
    },
```

Author: cameronr

README.md

@@ -90,6 +90,8 @@ Install the plugin with your favorite package manager. See the [Configuration](#
 
 ## ⚙️ Configuration
 
+> **Note**: The keymap configuration structure has been updated. Old keymaps (`keymap.global` and `keymap.window`) will be mapped to the new format (`keymap.editor`, `keymap.input_window`, `keymap.output_window`) but you should update your config to the new format. See [Keymap Configuration](#keymap-configuration) below for details.
+
 ```lua
 -- Default configuration with all available options
 require('opencode').setup({
@@ -98,49 +100,58 @@ require('opencode').setup({
   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 = {
-    global = {
-      toggle = '<leader>og', -- Open opencode. Close if opened
-      open_input = '<leader>oi', -- Opens and focuses on input window on insert mode
-      open_input_new_session = '<leader>oI', -- Opens and focuses on input window on insert mode. Creates a new session
-      open_output = '<leader>oo', -- Opens and focuses on output window
-      toggle_focus = '<leader>ot', -- Toggle focus between opencode and last window
-      close = '<leader>oq', -- Close UI windows
-      select_session = '<leader>os', -- Select and load a opencode session
-      configure_provider = '<leader>op', -- Quick provider and model switch from predefined list
-      diff_open = '<leader>od', -- Opens a diff tab of a modified file since the last opencode prompt
-      diff_next = '<leader>o]', -- Navigate to next file diff
-      diff_prev = '<leader>o[', -- Navigate to previous file diff
-      diff_close = '<leader>oc', -- Close diff view tab and return to normal editing
-      diff_revert_all_last_prompt = '<leader>ora', -- Revert all file changes since the last opencode prompt
-      diff_revert_this_last_prompt = '<leader>ort', -- Revert current file changes since the last opencode prompt
-      diff_revert_all = '<leader>orA', -- Revert all file changes since the last opencode session
-      diff_revert_this = '<leader>orT', -- Revert current file changes since the last opencode session
-      swap_position = '<leader>ox', -- Swap Opencode pane left/right
-      permission_accept = '<leader>opa',  -- Accept permission request once
-      permission_accept_all = '<leader>opA', -- Accept all (for current tool)
-      permission_deny = '<leader>opd',-- Accept permission request once
+    editor = {
+      ['<leader>og'] = { 'toggle' }, -- Open opencode. Close if opened
+      ['<leader>oi'] = { 'open_input' }, -- Opens and focuses on input window on insert mode
+      ['<leader>oI'] = { 'open_input_new_session' }, -- Opens and focuses on input window on insert mode. Creates a new session
+      ['<leader>oo'] = { 'open_output' }, -- Opens and focuses on output window
+      ['<leader>ot'] = { 'toggle_focus' }, -- Toggle focus between opencode and last window
+      ['<leader>oq'] = { 'close' }, -- Close UI windows
+      ['<leader>os'] = { 'select_session' }, -- Select and load a opencode session
+      ['<leader>op'] = { 'configure_provider' }, -- Quick provider and model switch from predefined list
+      ['<leader>od'] = { 'diff_open' }, -- Opens a diff tab of a modified file since the last opencode prompt
+      ['<leader>o]'] = { 'diff_next' }, -- Navigate to next file diff
+      ['<leader>o['] = { 'diff_prev' }, -- Navigate to previous file diff
+      ['<leader>oc'] = { 'diff_close' }, -- Close diff view tab and return to normal editing
+      ['<leader>ora'] = { 'diff_revert_all_last_prompt' }, -- Revert all file changes since the last opencode prompt
+      ['<leader>ort'] = { 'diff_revert_this_last_prompt' }, -- Revert current file changes since the last opencode prompt
+      ['<leader>orA'] = { 'diff_revert_all' }, -- Revert all file changes since the last opencode session
+      ['<leader>orT'] = { 'diff_revert_this' }, -- Revert current file changes since the last opencode session
+      ['<leader>orr'] = { 'diff_restore_snapshot_file' }, -- Restore a file to a restore point
+      ['<leader>orR'] = { 'diff_restore_snapshot_all' }, -- Restore all files to a restore point
+      ['<leader>ox'] = { 'swap_position' }, -- Swap Opencode pane left/right
+      ['<leader>opa'] = { 'permission_accept' }, -- Accept permission request once
+      ['<leader>opA'] = { 'permission_accept_all' }, -- Accept all (for current tool)
+      ['<leader>opd'] = { 'permission_deny' }, -- Deny permission request once
+    },
+    input_window = {
+      ['<cr>'] = { 'submit_input_prompt', mode = { 'n', 'i' } }, -- Submit prompt (normal mode and insert mode)
+      ['<esc>'] = { 'close' }, -- Close UI windows
+      ['<C-c>'] = { 'stop' }, -- Stop opencode while it is running
+      ['~'] = { 'mention_file', mode = 'i' }, -- Pick a file and add to context. See File Mentions section
+      ['@'] = { 'mention', mode = 'i' }, -- Insert mention (file/agent)
+      ['/'] = { 'slash_commands', mode = 'i' }, -- Pick a command to run in the input window
+      ['<tab>'] = { 'toggle_pane', mode = { 'n', 'i' } }, -- Toggle between input and output panes
+      ['<up>'] = { 'prev_prompt_history', mode = { 'n', 'i' } }, -- Navigate to previous prompt in history
+      ['<down>'] = { 'next_prompt_history', mode = { 'n', 'i' } }, -- Navigate to next prompt in history
+      ['<M-m>'] = { 'switch_mode' }, -- Switch between modes (build/plan)
+    },
+    output_window = {
+      ['<esc>'] = { 'close' }, -- Close UI windows
+      ['<C-c>'] = { 'stop' }, -- Stop opencode while it is running
+      [']]'] = { 'next_message' }, -- Navigate to next message in the conversation
+      ['[['] = { 'prev_message' }, -- Navigate to previous message in the conversation
+      ['<tab>'] = { 'toggle_pane', mode = { 'n', 'i' } }, -- Toggle between input and output panes
+      ['<C-i>'] = { 'focus_input' }, -- Focus on input window and enter insert mode at the end of the input from the output window
+      ['<leader>oS'] = { 'select_child_session' }, -- Select and load a child session
+      ['<leader>oD'] = { 'debug_message' }, -- Open raw message in new buffer for debugging
+      ['<leader>oO'] = { 'debug_output' }, -- Open raw output in new buffer for debugging
+      ['<leader>ods'] = { 'debug_session' }, -- Open raw session in new buffer for debugging
     },
-    window = {
-      submit = '<cr>', -- Submit prompt (normal mode)
-      submit_insert = '<cr>', -- Submit prompt (insert mode)
-      close = '<esc>', -- Close UI windows
-      stop = '<C-c>', -- Stop opencode while it is running
-      next_message = ']]', -- Navigate to next message in the conversation
-      prev_message = '[[', -- Navigate to previous message in the conversation
-      mention = '@', -- Insert mention (file/agent)
-      mention_file = '~', -- Pick a file and add to context. See File Mentions section
-      slash_commands = '/', -- Pick a command to run in the input window
-      toggle_pane = '<tab>', -- Toggle between input and output panes
-      prev_prompt_history = '<up>', -- Navigate to previous prompt in history
-      next_prompt_history = '<down>', -- Navigate to next prompt in history
-      switch_mode = '<M-m>', -- Switch between modes (build/plan)
-      focus_input = '<C-i>', -- Focus on input window and enter insert mode at the end of the input from the output window
-      select_child_session = '<leader>oS', -- Select and load a child session
-      debug_message = '<leader>oD', -- Open raw message in new buffer for debugging
-      debug_output = '<leader>oO', -- Open raw output in new buffer for debugging
-      permission_accept = 'a',  -- Accept permission request once (only available when there is a pending permission request)
-      permission_accept_all = 'A', -- Accept all (for current tool) permission request once (only available when there is a pending permission request)
-      permission_deny = 'd',-- Accept permission request once (only available when there is a pending permission request)
+    permission = {
+      accept = 'a', -- Accept permission request once (only available when there is a pending permission request)
+      accept_all = 'A', -- Accept all (for current tool) permission request once (only available when there is a pending permission request)
+      deny = 'd', -- Deny permission request once (only available when there is a pending permission request)
     },
   },
   ui = {
@@ -154,7 +165,7 @@ require('opencode').setup({
     window_highlight = 'Normal:OpencodeBackground,FloatBorder:OpencodeBorder', -- Highlight group for the opencode window
     icons = {
       preset = 'emoji', -- 'emoji' | 'text'. Choose UI icon style (default: 'emoji')
-      overrides = {},   -- Optional per-key overrides, see section below
+      overrides = {}, -- Optional per-key overrides, see section below
     },
     output = {
       tools = {
@@ -224,6 +235,24 @@ require('opencode').setup({
 })
 ```
 
+### Keymap Configuration
+
+The keymap configuration has been restructured for better organization and clarity:
+
+- **`editor`**: Global keymaps that are available throughout Neovim
+- **`input_window`**: Keymaps specific to the input window
+- **`output_window`**: Keymaps specific to the output window
+- **`permission`**: Special keymaps for responding to permission requests (available in input/output windows when there's a pending permission)
+
+**Backward Compatibility**: The plugin automatically maps configurations that use `keymap.global` and `keymap.window` to the new structure. A deprecation warning will be shown during migration. Update your configuration to use the new structure to remove the warning.
+
+Each keymap entry is a table consising of:
+
+- The string name of an api function = `{ 'toggle' }`
+- Or a custom function: `{ function() ... end }`
+- An optional mode: `{ 'toggle', mode = { 'n', 'i' } }`
+- An optional desc: `{'toggle', desc = 'Toggle Opencode' }`
+
 ### UI icons (disable emojis or customize)
 
 By default, opencode.nvim uses emojis for icons in the UI. If you prefer a plain, emoji-free interface, you can switch to the `text` preset or override icons individually.

lua/opencode/api.lua

@@ -229,8 +229,8 @@ function M.next_history()
 end
 
 function M.prev_prompt_history()
-  local config = require('opencode.config').get()
-  local key = config.keymap.window.prev_prompt_history
+  local config = require('opencode.config')
+  local key = config.get_key_for_function('input_window', 'prev_prompt_history')
   if key ~= '<up>' then
     return M.prev_history()
   end
@@ -244,8 +244,8 @@ function M.prev_prompt_history()
 end
 
 function M.next_prompt_history()
-  local config = require('opencode.config').get()
-  local key = config.keymap.window.next_prompt_history
+  local config = require('opencode.config')
+  local key = config.get_key_for_function('input_window', 'next_prompt_history')
   if key ~= '<down>' then
     return M.next_history()
   end
@@ -282,15 +282,15 @@ function M.mention_file()
 end
 
 function M.mention()
-  local config = require('opencode.config').get()
-  local char = config.keymap.window.mention
+  local config = require('opencode.config')
+  local char = config.get_key_for_function('input_window', 'mention')
   ui.focus_input({ restore_position = true, start_insert = true })
   require('opencode.ui.completion').trigger_completion(char)()
 end
 
 function M.slash_commands()
-  local config = require('opencode.config').get()
-  local char = config.keymap.window.slash_commands
+  local config = require('opencode.config')
+  local char = config.get_key_for_function('input_window', 'slash_commands')
   ui.focus_input({ restore_position = true, start_insert = true })
   require('opencode.ui.completion').trigger_completion(char)()
 end