feat: implement project root detection for terminal providers

lua/opencode/provider/init.lua

@@ -52,6 +52,43 @@
 
 local M = {}
 
+---Get the project root directory using smart detection.
+---Priority: 1) git root, 2) LSP workspace, 3) nvim directory argument, 4) current buffer dir, 5) cwd
+---@return string
+function M.get_project_root()
+  local cwd = vim.fn.getcwd()
+
+  local git_cmd = "git -C " .. vim.fn.shellescape(cwd) .. " rev-parse --show-toplevel 2>/dev/null"
+  local git_root = vim.fn.systemlist(git_cmd)[1]
+  if vim.v.shell_error == 0 and git_root and git_root ~= "" then
+    return git_root
+  end
+
+  local clients = vim.lsp.get_clients({ bufnr = 0 })
+  for _, client in ipairs(clients) do
+    if client.config.root_dir then
+      return client.config.root_dir
+    end
+  end
+
+  local arg = vim.fn.argv(0)
+  ---@cast arg string
+  if arg and arg ~= "" and vim.fn.isdirectory(arg) == 1 then
+    local path = vim.fn.fnamemodify(arg, ":p"):gsub("/$", "")
+    return path
+  end
+
+  local buf_name = vim.api.nvim_buf_get_name(0)
+  if buf_name and buf_name ~= "" then
+    local buf_dir = vim.fn.fnamemodify(buf_name, ":p:h")
+    if vim.fn.isdirectory(buf_dir) == 1 then
+      return buf_dir
+    end
+  end
+
+  return cwd
+end
+
 local function subscribe_to_sse()
   if not require("opencode.config").opts.events.enabled then
     return

lua/opencode/provider/kitty.lua

@@ -103,7 +103,8 @@ function Kitty:start()
   end
 
   local location = self.opts.location
-  local launch_cmd = { "launch", "--cwd=current", "--hold", "--dont-take-focus" }
+  local cwd = require("opencode.provider").get_project_root()
+  local launch_cmd = { "launch", "--cwd=" .. cwd, "--hold", "--dont-take-focus" }
 
   -- Input validation for `location` option
   local VALID_LOCATIONS = {

lua/opencode/provider/snacks.lua

@@ -42,13 +42,41 @@ function Snacks:get()
   return win
 end
 
+---@param current_cwd string
+---@return boolean
+---@private
+function Snacks:hide_other_visible_terminals(current_cwd)
+  local terminals = require("snacks.terminal").list()
+  local did_hide = false
+  for _, term in ipairs(terminals) do
+    if term.buf and vim.api.nvim_buf_is_valid(term.buf) then
+      local term_info = vim.b[term.buf].snacks_terminal
+      local is_opencode = term_info and term_info.cmd == self.cmd
+      local is_other_cwd = term_info and term_info.cwd ~= current_cwd
+      local is_visible = term.win and vim.api.nvim_win_is_valid(term.win)
+      if is_opencode and is_other_cwd and is_visible then
+        term:hide()
+        did_hide = true
+      end
+    end
+  end
+  return did_hide
+end
+
 function Snacks:toggle()
-  require("snacks.terminal").toggle(self.cmd, self.opts)
+  local cwd = require("opencode.provider").get_project_root()
+  if self:hide_other_visible_terminals(cwd) then
+    return
+  end
+  local opts = vim.tbl_deep_extend("force", self.opts, { cwd = cwd })
+  require("snacks.terminal").toggle(self.cmd, opts)
 end
 
 function Snacks:start()
   if not self:get() then
-    require("snacks.terminal").open(self.cmd, self.opts)
+    local cwd = require("opencode.provider").get_project_root()
+    local opts = vim.tbl_deep_extend("force", self.opts, { cwd = cwd })
+    require("snacks.terminal").open(self.cmd, opts)
   end
 end
 

lua/opencode/provider/terminal.lua

@@ -51,6 +51,7 @@ function Terminal:start()
     -- FIX: There's a few empty columns on the right side of the terminal until it's redrawn, at least for me.
     vim.fn.jobstart(self.cmd, {
       term = true,
+      cwd = require("opencode.provider").get_project_root(),
       on_exit = function()
         self.winid = nil
         self.bufnr = nil

lua/opencode/provider/tmux.lua

@@ -73,9 +73,10 @@ end
 function Tmux:start()
   local pane_id = self:get_pane_id()
   if not pane_id then
-    -- Create new pane
+    local cwd = require("opencode.provider").get_project_root()
+    local options = self.opts.options or ""
     self.pane_id =
-      vim.fn.system(string.format("tmux split-window -d -P -F '#{pane_id}' %s '%s'", self.opts.options, self.cmd))
+      vim.fn.system(string.format("tmux split-window -d -P -F '#{pane_id}' -c '%s' %s '%s'", cwd, options, self.cmd))
   end
 end
 

lua/opencode/provider/wezterm.lua

@@ -108,6 +108,9 @@ function Wezterm:start()
   if not pane_id then
     local cmd_parts = { "wezterm", "cli", "split-pane" }
 
+    table.insert(cmd_parts, "--cwd")
+    table.insert(cmd_parts, require("opencode.provider").get_project_root())
+
     if self.opts.direction then
       table.insert(cmd_parts, "--" .. self.opts.direction)
     end