justsisyphus 3ee519c7b0
feat: make systemDefaultModel optional for OpenCode fallback (#1136)
- Remove mandatory model requirement from plugin initialization
- Allow OpenCode to use its built-in model fallback when user doesn't specify
- Update model-resolver to handle undefined systemDefaultModel
- Remove throw errors in config-handler, utils, atlas, delegate-task
- Add tests for optional model scenarios

Closes #1129

Co-authored-by: justsisyphus <justsisyphus@users.noreply.github.com>
2026-01-26 17:01:08 +09:00
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