feat: add cmd for editing config.json via $EDITOR

packages/opencode/src/config/config.ts

@@ -72,6 +72,7 @@ export namespace Config {
         .describe("Leader key for keybind combinations"),
       help: z.string().optional().describe("Show help dialog"),
       editor_open: z.string().optional().describe("Open external editor"),
+      config: z.string().optional().describe("Edit configuration file"),
       session_new: z.string().optional().describe("Create a new session"),
       session_list: z.string().optional().describe("List all sessions"),
       session_share: z.string().optional().describe("Share current session"),

packages/tui/internal/commands/command.go

@@ -101,6 +101,7 @@ const (
 	MessagesLayoutToggleCommand CommandName = "messages_layout_toggle"
 	MessagesCopyCommand         CommandName = "messages_copy"
 	MessagesRevertCommand       CommandName = "messages_revert"
+	ConfigCommand               CommandName = "config"
 	AppExitCommand              CommandName = "app_exit"
 )
 
@@ -298,6 +299,12 @@ func LoadFromConfig(config *opencode.Config) CommandRegistry {
 			Description: "revert message",
 			Keybindings: parseBindings("<leader>r"),
 		},
+		{
+			Name:        ConfigCommand,
+			Description: "edit config",
+			Keybindings: parseBindings("<leader>o"),
+			Trigger:     "config",
+		},
 		{
 			Name:        AppExitCommand,
 			Description: "exit the app",

packages/tui/internal/tui/tui.go

@@ -5,6 +5,7 @@ import (
 	"log/slog"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -968,6 +969,28 @@ func (a appModel) executeCommand(command commands.Command) (tea.Model, tea.Cmd)
 			cmds = append(cmds, cmd)
 		}
 	case commands.MessagesRevertCommand:
+	case commands.ConfigCommand:
+		if a.app.IsBusy() {
+			return a, nil
+		}
+		editor := os.Getenv("EDITOR")
+		if editor == "" {
+			return a, toast.NewErrorToast("No EDITOR set, can't open config")
+		}
+
+		configPath := filepath.Join(a.app.Info.Path.Config, "config.json")
+		c := exec.Command(editor, configPath) //nolint:gosec
+		c.Stdin = os.Stdin
+		c.Stdout = os.Stdout
+		c.Stderr = os.Stderr
+    cmd := tea.ExecProcess(c, func(err error) tea.Msg {
+			if err != nil {
+				slog.Error("Failed to open config", "error", err)
+				return toast.NewErrorToast("Failed to open config")()
+			}
+      return tea.QuitMsg{}
+		})
+		cmds = append(cmds, cmd)
 	case commands.AppExitCommand:
 		return a, tea.Quit
 	}

packages/tui/sdk/config.go

@@ -397,6 +397,8 @@ func (r configProviderModelsLimitJSON) RawJSON() string {
 type Keybinds struct {
 	// Exit the application
 	AppExit string `json:"app_exit"`
+	// Edit configuration file
+	Config string `json:"config"`
 	// Open external editor
 	EditorOpen string `json:"editor_open"`
 	// Show help dialog
@@ -455,6 +457,7 @@ type Keybinds struct {
 // keybindsJSON contains the JSON metadata for the struct [Keybinds]
 type keybindsJSON struct {
 	AppExit              apijson.Field
+	Config               apijson.Field
 	EditorOpen           apijson.Field
 	Help                 apijson.Field
 	HistoryNext          apijson.Field

packages/web/src/content/docs/docs/config.mdx

@@ -22,6 +22,17 @@ In most cases, you'll want to use the global config for things like themes, prov
 
 When opencode starts up, it looks for a config file in the current directory or traverse up to the nearest Git directory.
 
+## Quick Access
+
+You can quickly open your global config file for editing using the `/config` command in opencode. This will open `~/.config/opencode/config.json` in your default editor (set via the `$EDITOR` environment variable).
+
+- **Command**: `/config`
+- **Keybinding**: `<leader>o` (where leader is typically `Ctrl+X`)
+
+This is the fastest way to modify your global configuration without leaving the opencode interface.
+
+You can customize the keybinding by setting the `config` field in your keybinds configuration. See the [keybinds documentation](/docs/keybinds) for more details.
+
 ---
 
 ## Schema
@@ -39,7 +50,7 @@ You can configure the providers and models you want to use in your opencode conf
 ```json title="opencode.json"
 {
   "$schema": "https://opencode.ai/config.json",
-  "provider": { },
+  "provider": {},
   "model": ""
 }
 ```
@@ -70,7 +81,7 @@ You can customize your keybinds through the `keybinds` option.
 ```json title="opencode.json"
 {
   "$schema": "https://opencode.ai/config.json",
-  "keybinds": { }
+  "keybinds": {}
 }
 ```
 
@@ -85,7 +96,7 @@ You can configure MCP servers you want to use through the `mcp` option.
 ```json title="opencode.json"
 {
   "$schema": "https://opencode.ai/config.json",
-  "mcp": { }
+  "mcp": {}
 }
 ```
 
@@ -105,6 +116,7 @@ You can disable providers that are loaded automatically through the `disabled_pr
 ```
 
 The `disabled_providers` option accepts an array of provider IDs. When a provider is disabled:
+
 - It won't be loaded even if environment variables are set
 - It won't be loaded even if API keys are configured through `opencode auth login`
 - The provider's models won't appear in the model selection list