feat(ui): add keymap and cmd to rename current session

The new keymap is `<leader>oR`

Author: sudo-tee

README.md

@@ -109,6 +109,7 @@ require('opencode').setup({
       ['<leader>oT'] = { 'timeline' }, -- Display timeline picker to navigate/undo/redo/fork messages
       ['<leader>oq'] = { 'close' }, -- Close UI windows
       ['<leader>os'] = { 'select_session' }, -- Select and load a opencode session
+      ['<leader>oR'] = { 'rename_session' }, -- Rename current session
       ['<leader>op'] = { 'configure_provider' }, -- Quick provider and model switch from predefined list
       ['<leader>oz'] = { 'toggle_zoom' }, -- Zoom in/out on the Opencode windows
       ['<leader>od'] = { 'diff_open' }, -- Opens a diff tab of a modified file since the last opencode prompt
@@ -330,6 +331,7 @@ The plugin provides the following actions that can be triggered via keymaps, com
 | Open input window (new session)                           | `<leader>oI`                          | `:Opencode open input_new_session`          | `require('opencode.api').open_input_new_session()`                     |
 | Open output window                                        | `<leader>oo`                          | `:Opencode open output`                     | `require('opencode.api').open_output()`                                |
 | Create and switch to a named session                      | -                                     | `:Opencode session new <name>`              | `:Opencode session new <name>` (user command)                          |
+| Rename current session                                    | `<leader>oR`                          | `:Opencode session rename <name>`           | `:Opencode session rename <name>` (user command)                       |
 | Toggle focus opencode / last window                       | `<leader>ot`                          | `:Opencode toggle focus`                    | `require('opencode.api').toggle_focus()`                               |
 | Close UI windows                                          | `<leader>oq`                          | `:Opencode close`                           | `require('opencode.api').close()`                                      |
 | Select and load session                                   | `<leader>os`                          | `:Opencode session select`                  | `require('opencode.api').select_session()`                             |

lua/opencode/api.lua

@@ -741,6 +741,54 @@ function M.fork_session(message_id)
     end)
 end
 
+---@param current_session? Session
+--- @param new_title? string
+function M.rename_session(current_session, new_title)
+  local promise = require('opencode.promise').new()
+  current_session = current_session or vim.deepcopy(state.active_session) --[[@as Session]]
+  if not current_session then
+    vim.notify('No active session to rename', vim.log.levels.WARN)
+    promise:resolve(nil)
+    return promise
+  end
+  local function rename_session_with_title(title)
+    state.api_client
+      :update_session(current_session.id, { title = title })
+      :catch(function(err)
+        vim.schedule(function()
+          vim.notify('Failed to rename session: ' .. vim.inspect(err), vim.log.levels.ERROR)
+        end)
+      end)
+      :and_then(function()
+        current_session.title = title
+        if state.active_session and state.active_session.id == current_session.id then
+          local session_obj = session.get_by_id(current_session.id)
+          if session_obj then
+            session_obj.title = title
+            state.active_session = vim.deepcopy(session_obj)
+          end
+        end
+        promise:resolve(current_session)
+      end)
+  end
+
+  if new_title and new_title ~= '' then
+    rename_session_with_title(new_title)
+    return promise
+  end
+
+  vim.schedule(function()
+    vim.ui.input({ prompt = 'New session name: ', default = current_session.title or '' }, function(input)
+      if input and input ~= '' then
+        rename_session_with_title(input)
+      else
+        promise:resolve(nil)
+      end
+    end)
+  end)
+  return promise
+end
+
 -- Returns the ID of the next user message after the current undo point
 -- This is a port of the opencode tui logic
 -- https://github.com/sst/opencode/blob/dev/packages/tui/internal/components/chat/messages.go#L1199
@@ -913,8 +961,8 @@ M.commands = {
   },
 
   session = {
-    desc = 'Manage sessions (new/select/child/compact/share/unshare)',
-    completions = { 'new', 'select', 'child', 'compact', 'share', 'unshare', 'agents_init' },
+    desc = 'Manage sessions (new/select/child/compact/share/unshare/rename)',
+    completions = { 'new', 'select', 'child', 'compact', 'share', 'unshare', 'agents_init', 'rename' },
     fn = function(args)
       local subcmd = args[1]
       if subcmd == 'new' then
@@ -942,6 +990,9 @@ M.commands = {
         M.unshare()
       elseif subcmd == 'agents_init' then
         M.initialize()
+      elseif subcmd == 'rename' then
+        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, ', ')
         vim.notify('Invalid session subcommand. Use: ' .. valid_subcmds, vim.log.levels.ERROR)

lua/opencode/config.lua

@@ -22,6 +22,7 @@ M.defaults = {
       ['<leader>oT'] = { 'timeline', desc = 'Session timeline' },
       ['<leader>oq'] = { 'close', desc = 'Close Opencode window' },
       ['<leader>os'] = { 'select_session', desc = 'Select session' },
+      ['<leader>oR'] = { 'rename_session', desc = 'Rename session' },
       ['<leader>op'] = { 'configure_provider', desc = 'Configure provider' },
       ['<leader>oz'] = { 'toggle_zoom', desc = 'Toggle zoom' },
       ['<leader>od'] = { 'diff_open', desc = 'Open diff view' },

lua/opencode/ui/session_picker.lua

@@ -2,6 +2,7 @@ local M = {}
 local config = require('opencode.config')
 local base_picker = require('opencode.ui.base_picker')
 local util = require('opencode.util')
+local api = require('lua.opencode.api')
 
 ---Format session parts for session picker
 ---@param session Session object
@@ -18,28 +19,24 @@ function M.pick(sessions, callback)
       label = 'rename',
       fn = function(selected, opts)
         local promise = require('opencode.promise').new()
-        local state = require('opencode.state')
-
-        vim.schedule(function()
-          vim.ui.input({ prompt = 'New session name: ', default = selected.title or '' }, function(input)
-            if input and input ~= '' then
-              state.api_client:update_session(selected.id, { title = input }):catch(function(err)
-                vim.schedule(function()
-                  vim.notify('Failed to rename session: ' .. vim.inspect(err), vim.log.levels.ERROR)
-                end)
-              end)
-              selected.title = input
-              local idx = util.find_index_of(opts.items, function(item)
-                return item.id == selected.id
-              end)
-
-              if idx > 0 then
-                opts.items[idx].title = input
-              end
+        api
+          .rename_session(selected)
+          :and_then(function(updated_session)
+            local idx = util.find_index_of(opts.items, function(item)
+              return item.id == updated_session.id
+            end)
+            if idx > 0 then
+              opts.items[idx] = updated_session
             end
             promise:resolve(opts.items)
           end)
-        end)
+          :catch(function(err)
+            vim.schedule(function()
+              vim.notify('Failed to rename session: ' .. vim.inspect(err), vim.log.levels.ERROR)
+              promise:resolve(nil)
+            end)
+          end)
+
         return promise
       end,
       reload = true,