| # Worked example: edit a reading library |
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| Task: `reading_library__open_hall__00__edit`. This is a repository-owned author control, not a model submission. |
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| The complete public request is in `task.json`, `prompt.txt` and `contract.json`. The solver receives `starter.blend` and the published edit region. `edited.blend` is the authored positive control; `base.blend` supplies the original reference environment. These native files have the same SHA256 bindings as the website's corresponding controls. |
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| | Control | A | G | F | P | Native score | Critical pass | |
| | --- | ---: | ---: | ---: | ---: | ---: | --- | |
| | Requested edit | 1 | 1 | 1 | 1 | 100 | true | |
| | Unchanged starter | 1 | 0.9787234043 | 1 | 1 | 49 | false | |
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| The unchanged starter preserves the protected environment but fails the requested intervention. A high mean geometric score cannot override that critical failure. R is inapplicable to editing; C, V and full_score are unmeasured. |
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| `evidence/` and `unchanged-starter-evidence/` contain actual independently extracted geometry, inspection, fixed renders, bound preservation evidence and clause-level results. `starter-evidence/` is the preservation reference. `scoring-requested_edit/` and `scoring-unchanged_starter/` record evaluator-7 numerical recomputation, its process limits and actual dependency identities. `provenance.json` identifies the native artifacts and distinguishes this new numerical run from the preserved extraction. No model API was called. |
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| To rebuild the authored native scenes with Blender 4.2.23: |
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| ```bash |
| blender --background --factory-startup --python build_scene.py -- \ |
| --repository /absolute/path/to/SpaceCode-Bench --out /absolute/path/to/rebuilt |
| ``` |
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| The builder uses `spec.json` and the repository's procedural mesher. A rebuilt `.blend` may differ byte-for-byte because of save metadata; compare extracted geometry under the same documented toolchain. Author generation is a reproducibility aid and is not an allowed solver input. |
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| For model evaluation, download the complete dataset and use the repository's `spacecode batch` or `spacecode evaluate` entry. They validate public/private resources and isolate candidate execution before extraction and numerical scoring. The standalone legacy `spacecode score` command does not implement this native protocol. |
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| Data: CC BY 4.0, Yuhao Du. Builder code: MIT. See the licenses at the repository root. |
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