Versioning context means tracking metadata (version tags, timestamps, source IDs) alongside context entries, so you know which memory belongs to which era or schema. When domain knowledge changes or systems upgrade, you can mark older context as deprecated or transform it (e.g. re-embed with new embedding model) before reuse.
If you change embedding models or context structure, you might need to migrate old context entries into new formats. For example, when you upgrade embedding dimensions, re-embed stored content or build alignment layers. You might keep dual memory stores (old and new) during transition. Also, maintain backward compatibility in prompt templates so older context still fits expected input format.
Evolution of context helps your system adapt without breaking existing flows. With versioning and migration, you can upgrade memory or context logic without catastrophic failure or inconsistency.