fix: respect XDG base directory env vars for config and log paths

Config loader now checks XDG_CONFIG_HOME before falling back to
~/.config/opencode. Logger now uses XDG_DATA_HOME (defaulting to
~/.local/share) for log storage, which is where runtime data belongs
per the XDG Base Directory Specification.

No behavior change for users with default (unset) XDG paths.

Author: NamedIdentity

lib/config.ts

@@ -526,7 +526,9 @@ const defaultConfig: PluginConfig = {
     },
 }
 
-const GLOBAL_CONFIG_DIR = join(homedir(), ".config", "opencode")
+const GLOBAL_CONFIG_DIR = process.env.XDG_CONFIG_HOME
+    ? join(process.env.XDG_CONFIG_HOME, "opencode")
+    : join(homedir(), ".config", "opencode")
 const GLOBAL_CONFIG_PATH_JSONC = join(GLOBAL_CONFIG_DIR, "dcp.jsonc")
 const GLOBAL_CONFIG_PATH_JSON = join(GLOBAL_CONFIG_DIR, "dcp.json")
 

lib/logger.ts

@@ -9,8 +9,9 @@ export class Logger {
 
     constructor(enabled: boolean) {
         this.enabled = enabled
-        const opencodeConfigDir = join(homedir(), ".config", "opencode")
-        this.logDir = join(opencodeConfigDir, "logs", "dcp")
+        const dataHome =
+            process.env.XDG_DATA_HOME || join(homedir(), ".local", "share")
+        this.logDir = join(dataHome, "opencode", "logs", "dcp")
     }
 
     private async ensureLogDir() {