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## Why Persisted base instructions need to retain whether they were explicitly customized or generated from a model template. Without that distinction, forks and config-lock replays can treat model-generated instructions as custom and keep the wrong template after a model or personality change. ## What changed - Record custom or model provenance with base instructions in rollouts and config locks. - Preserve custom instructions across model changes, while allowing model-generated instructions to follow the selected model and personality. - Keep legacy rollouts without provenance compatible and propagate provenance through forks and spawned agents. ## Testing - Cover provenance serialization and legacy rollout decoding. - Cover role personality changes, forked model changes, config-lock replay, and multi-agent configuration. GitOrigin-RevId: 801c26559835f558027ce5112700c0cd31fcb21b