{"version":"2.1.268","anchor":"system-prompt-diff-telemetry-expanded-with-change-scope-clas","canonical_anchor":"system-prompt-diff-telemetry-expanded-with-change-scope-clas","heading":"System-prompt diff telemetry expanded with change-scope classification","tier":"internal","area":"System Prompt","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.268\/e\/system-prompt-diff-telemetry-expanded-with-change-scope-clas","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.268","markdown":"### System-prompt diff telemetry expanded with change-scope classification\n\nSystem-prompt diff telemetry now classifies how the prompt changed between turns\n\n**What**\n\nThe internal telemetry that compares the previous system prompt to the new one now records more detail: the previous model (`prevModel`), hashes of the previous and new beta feature sets (`prevBetasHash`\/`newBetasHash`), counts of previous and new system turns (`prevSystemTurns`\/`newSystemTurns`), and a new `changeScope` classification of the diff, which can be `none`, `unknown`, `rewrite`, or `tail_append`.\n\n**Why**\n\nThis lets internal analysis distinguish minor prompt changes, such as an appended tail, from a full rewrite, and correlate prompt changes with model or beta-feature switches, without exposing anything new to end users.\n\n- Area: System Prompt\n- Names: `changeScope`\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 2\/5"}