{"version":"2.1.98","anchor":"opus-4-6-communication-style-tuning-gradual-rollout","canonical_anchor":"opus-4-6-communication-style-tuning-gradual-rollout","heading":"Opus 4.6 Communication Style Tuning [Gradual Rollout]","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.98\/e\/opus-4-6-communication-style-tuning-gradual-rollout","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.98","markdown":"### Opus 4.6 Communication Style Tuning [Gradual Rollout]\n\n**What**\n\nDifferentiated system prompt instructions for Opus 4.6 models that emphasize concise, anti-verbose communication and refined code quality guidance.\n\n**Status**\n\nFeature-flagged via `quiet_salted_ember` (server-controlled, only applies to Opus 4.6 models)\n\n**Details**\n\n- When enabled, adds a \"Communicating with the user\" prompt section instructing the model to give brief updates at key moments rather than verbose explanations\n- Includes refined code quality instructions: \"Default to writing no comments. Only add one when the WHY is non-obvious\"\n- Adds anti-verbosity guidance as a separate prompt category\n- Includes refined instructions about not adding features\/refactoring beyond what was asked\n- The `cM6()` gate function checks both the model family (must include \"opus-4-6\") and the `quiet_salted_ember` flag value\n\n**Evidence**\n\nOpus 4.6 prompt tuning (gated by `quiet_salted_ember`, search for `\"Default to writing no comments\"` and `\"Communicating with the user\"`)"}