Changelog
- cbb44f3 feat(opencode): add background-agents plugin and delegate tools for multi-mode
- 925896f fix(skills): skip sdd-* skills to avoid double-write conflict with sdd component
- e5d6855 fix(test): pin XDG_CONFIG_HOME in VSCode tests to prevent cross-package race on Linux CI
- f766c53 test(opencode): add plugin coverage across unit, integration, golden, and E2E tests