v2 regression: OPENCODE_CONFIG environment variable is ignored #48853

Description

There is a regression from v1 to v2 where the environment variable OPENCODE_CONFIG is no longer used to look up the configuration.

Previously, you could point it to a path containing the configuration file: https://opencode.ai/docs/config/#custom-path

According to the v2 docs, this is to be treated as a compatibility bug: https://opencode.ai/v2/docs/migrate-v1/#breaking-changes

Plugins

N/A

OpenCode version

v2.0.3

Steps to reproduce

1. Upgrade to v2
2. Run OPENCODE_CONFIG=/some/path/to/config.json opencode
3. Settings are not loaded from /some/path/to/config.json

Screenshot and/or share link

N/A

Operating System

NixOS 26.11-unstable

Terminal

Kitty