OpenCode integration

divine-opencode creates an isolated OpenCode JSON configuration using the @ai-sdk/openai-compatible provider and Divine Router's /v1 base URL. It sets OPENCODE_CONFIG, OPENCODE_CONFIG_DIR, an isolated data directory, disables sharing, and disables automatic updates for that run.

divine-opencode --model provider/model run "Review this small patch"

The API key in generated JSON is an environment reference, not a token value. Normal OpenCode configuration and data remain untouched. The wrapper forwards child exit status and operating system signals.