9.7.1 / 2026-06-17

• perf(document+model): improve save performance by avoiding unnecessary promise allocations and reducing path/default/dirty-state overhead #16331
• fix(schema): include ObjectId regex pattern in toJSONSchema() output #16335 #16334 AbdelrahmanHafez
• fix(populate): split populate into separate queries per document if the resulting $in filter has more than 50k elements to reduce risk of BSON size errors #16333 #5890
• docs: add assistant sidebar with MongoDB Knowledge integration #16311 #16283
• docs: update docs copy buttons, edit links, homepage alignment, and llms.txt generation #16326 #16327 #16329