## Summary
- add the complete Spec 196 artifact set for hard Filament nativity cleanup
- include spec, requirements checklist, plan, research, data model, logical contract, quickstart, and executable tasks
- update agent context after planning
- resolve all cross-artifact consistency issues so the feature package is implementation-ready
## Included artifacts
- specs/196-hard-filament-nativity-cleanup/spec.md
- specs/196-hard-filament-nativity-cleanup/checklists/requirements.md
- specs/196-hard-filament-nativity-cleanup/plan.md
- specs/196-hard-filament-nativity-cleanup/research.md
- specs/196-hard-filament-nativity-cleanup/data-model.md
- specs/196-hard-filament-nativity-cleanup/contracts/filament-nativity-cleanup.logical.openapi.yaml
- specs/196-hard-filament-nativity-cleanup/quickstart.md
- specs/196-hard-filament-nativity-cleanup/tasks.md
## Notes
- no runtime code paths were changed
- no application tests were run because this change set is spec and planning documentation only
- the artifact set was re-analyzed until no consistency issues remained
Co-authored-by: Ahmed Darrazi <ahmed.darrazi@live.de>
Reviewed-on: #231
