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  "title": "fix(weave): exclude null ref from object serialization",
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  "debrief": "OpenAI Codex took a fix task in wandb/weave to stop serializing the null ref field on ObjectRecord, so null refs no longer appear in logs. The change spans 253 files, with 17685 additions and 3254 deletions across nine commits. It drew one review round with zero change requests and merged clean after 470.59 hours.",
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  "body_excerpt": "`ref:null` was getting logged all over the place in our app. This PR fixes that for objects in a safe way moving forward.\n\n## Summary\n- don't serialize `ref` field on `ObjectRecord`\n- check that serialization drops null refs\n- ensure model publish/query excludes ref field\n\n## Testing\n- `nox --no-ins",
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