fix: respect OPENCODE_CONFIG_DIR environment variable across all config paths

Multiple files were hardcoding ~/.config/opencode paths instead of using
getOpenCodeConfigDir() which respects the OPENCODE_CONFIG_DIR env var.

This broke profile isolation features like OCX ghost mode, where users
set OPENCODE_CONFIG_DIR to a custom path but oh-my-opencode.json and
other configs weren't being read from that location.

Changes:
- plugin-config.ts: Use getOpenCodeConfigDir() directly
- cli/doctor/checks: Use getOpenCodeConfigDir() for auth and config checks
- tools/lsp/config.ts: Use getOpenCodeConfigDir() for LSP config paths
- command loaders: Use getOpenCodeConfigDir() for global command dirs
- hooks: Use getOpenCodeConfigDir() for hook config paths
- config-path.ts: Mark getUserConfigDir() as deprecated
- tests: Ensure OPENCODE_CONFIG_DIR is properly isolated in tests

src/hooks/auto-slash-command/executor.ts

@@ -1,12 +1,12 @@
 import { existsSync, readdirSync, readFileSync } from "fs"
 import { join, basename, dirname } from "path"
-import { homedir } from "os"
 import {
   parseFrontmatter,
   resolveCommandsInText,
   resolveFileReferencesInText,
   sanitizeModelField,
   getClaudeConfigDir,
+  getOpenCodeConfigDir,
 } from "../../shared"
 import type { CommandFrontmatter } from "../../features/claude-code-command-loader/types"
 import { isMarkdownFile } from "../../shared/file-utils"
@@ -101,9 +101,10 @@ export interface ExecutorOptions {
 }
 
 async function discoverAllCommands(options?: ExecutorOptions): Promise<CommandInfo[]> {
+  const configDir = getOpenCodeConfigDir({ binary: "opencode" })
   const userCommandsDir = join(getClaudeConfigDir(), "commands")
   const projectCommandsDir = join(process.cwd(), ".claude", "commands")
-  const opencodeGlobalDir = join(homedir(), ".config", "opencode", "command")
+  const opencodeGlobalDir = join(configDir, "command")
   const opencodeProjectDir = join(process.cwd(), ".opencode", "command")
 
   const userCommands = discoverCommandsFromDir(userCommandsDir, "user")

src/hooks/auto-update-checker/constants.ts

@@ -1,16 +1,12 @@
 import * as path from "node:path"
 import * as os from "node:os"
 import * as fs from "node:fs"
+import { getOpenCodeConfigDir } from "../../shared"
 
 export const PACKAGE_NAME = "oh-my-opencode"
 export const NPM_REGISTRY_URL = `https://registry.npmjs.org/-/package/${PACKAGE_NAME}/dist-tags`
 export const NPM_FETCH_TIMEOUT = 5000
 
-/**
- * OpenCode plugin cache directory
- * - Linux/macOS: ~/.cache/opencode/
- * - Windows: %LOCALAPPDATA%/opencode/
- */
 function getCacheDir(): string {
   if (process.platform === "win32") {
     return path.join(process.env.LOCALAPPDATA ?? os.homedir(), "opencode")
@@ -27,38 +23,11 @@ export const INSTALLED_PACKAGE_JSON = path.join(
   "package.json"
 )
 
-/**
- * OpenCode config file locations (priority order)
- * On Windows, checks ~/.config first (cross-platform), then %APPDATA% (fallback)
- * This matches shared/config-path.ts behavior for consistency
- */
-function getUserConfigDir(): string {
-  if (process.platform === "win32") {
-    const crossPlatformDir = path.join(os.homedir(), ".config")
-    const appdataDir = process.env.APPDATA ?? path.join(os.homedir(), "AppData", "Roaming")
-    
-    // Check cross-platform path first (~/.config)
-    const crossPlatformConfig = path.join(crossPlatformDir, "opencode", "opencode.json")
-    const crossPlatformConfigJsonc = path.join(crossPlatformDir, "opencode", "opencode.jsonc")
-    
-    if (fs.existsSync(crossPlatformConfig) || fs.existsSync(crossPlatformConfigJsonc)) {
-      return crossPlatformDir
-    }
-    
-    // Fall back to %APPDATA%
-    return appdataDir
-  }
-  return process.env.XDG_CONFIG_HOME ?? path.join(os.homedir(), ".config")
-}
-
-/**
- * Get the Windows-specific APPDATA directory (for fallback checks)
- */
 export function getWindowsAppdataDir(): string | null {
   if (process.platform !== "win32") return null
   return process.env.APPDATA ?? path.join(os.homedir(), "AppData", "Roaming")
 }
 
-export const USER_CONFIG_DIR = getUserConfigDir()
-export const USER_OPENCODE_CONFIG = path.join(USER_CONFIG_DIR, "opencode", "opencode.json")
-export const USER_OPENCODE_CONFIG_JSONC = path.join(USER_CONFIG_DIR, "opencode", "opencode.jsonc")
+export const USER_CONFIG_DIR = getOpenCodeConfigDir({ binary: "opencode" })
+export const USER_OPENCODE_CONFIG = path.join(USER_CONFIG_DIR, "opencode.json")
+export const USER_OPENCODE_CONFIG_JSONC = path.join(USER_CONFIG_DIR, "opencode.jsonc")

src/hooks/claude-code-hooks/config-loader.ts

@@ -1,8 +1,8 @@
 import { existsSync } from "fs"
-import { homedir } from "os"
 import { join } from "path"
 import type { ClaudeHookEvent } from "./types"
 import { log } from "../../shared/logger"
+import { getOpenCodeConfigDir } from "../../shared"
 
 export interface DisabledHooksConfig {
   Stop?: string[]
@@ -16,7 +16,7 @@ export interface PluginExtendedConfig {
   disabledHooks?: DisabledHooksConfig
 }
 
-const USER_CONFIG_PATH = join(homedir(), ".config", "opencode", "opencode-cc-plugin.json")
+const USER_CONFIG_PATH = join(getOpenCodeConfigDir({ binary: "opencode" }), "opencode-cc-plugin.json")
 
 function getProjectConfigPath(): string {
   return join(process.cwd(), ".opencode", "opencode-cc-plugin.json")