| # Evaluation protocol |
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| Evaluate translation as grounded data transformation, not sentence similarity. |
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| ## Required test pools |
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| - frozen bilingual gold rows for every supported language and construction; |
| - video-grounded rows stratified by action, object, hand configuration, |
| environment, state transition, confidence, and source; |
| - contrast pairs for open/close, source/destination, left/right, success/error, |
| observation/directive, singular/plural, negation, and temporal order; |
| - malformed and adversarial records; and |
| - rare vocabulary and low-confidence strata that cannot be hidden by frequency. |
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| ## Metrics |
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| Report separately by language and stratum: |
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| - supported-claim precision and recall; |
| - critical, major, and minor errors per 1,000 rows; |
| - action, object, hand, state, temporal, and provenance accuracy; |
| - bilingual adequacy and naturalness; |
| - withheld/abstention rate; |
| - multilingual video retrieval and temporal-localization performance; and |
| - constant-answer, language-blind, and source-only baselines. |
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| ## Recommended release gates |
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| - at least 99% of expressed claims supported by evidence; |
| - fewer than 0.5% critical semantic errors; |
| - at least 95% canonical-claim equivalence across language surfaces; |
| - mean bilingual adequacy at least 4.3/5 and naturalness at least 4.0/5; |
| - no failed action, source, factory, or language-hazard stratum hidden by the |
| aggregate; and |
| - multilingual retrieval within 5% relative of the English condition on the |
| same frozen relevance judgments. |
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| These are proposed acceptance thresholds, not scores achieved by this release. |
| The controlled conformance matrix is too small to establish production quality. |
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