{env:VAR} in permission keys expands to native Windows backslashes, producing invalid JSON on Windows

[ple-4js]

Description

When an environment variable is set with a native Windows path (backslashes), using{env:VAR}as a permission key causes opencode to fail with a JSON parse error on startup.

Plugins

No response

OpenCode version

1.14.33

Steps to reproduce

1. Set an environment variable with a native Windows path:

   set MYDIR=C:\Users\me\AppData\Roaming\MyApp\config

2. Add it as a permission key in opencode.json:

   "permission": {
   "external_directory": {
   "{env:MYDIR}/**": "allow"
   }
   }

3. Run opencode .

Expected behavior

opencode normalizes the expanded path to forward slashes before using it as a JSON key, or accepts backslashes in permission key paths on Windows.

Actual behavior

opencode expands {env:MYDIR} literally and treats the backslashes as JSON escape sequences, producing a parse error:

--- Errors ---
InvalidEscapeCharacter at line N, column 7
   Line N:       "C:\Users\me\AppData\Roaming\MyApp\config/**": "allow"
                ^
--- End ---

Workaround

Set the environment variable with forward slashes before launching opencode:

set MYDIR=C:/Users/me/AppData/Roaming/MyApp/config

This is not always possible when the variable is set by a third-party application that uses native Windows path separators.

Suggested fix

Normalize {env:...} expanded values to forward slashes before inserting them as permission key paths.

Screenshot and/or share link

No response

Operating System

Windows 11

Terminal

No response