{"version":"2.1.286","anchor":"system-prompt-sections-are-now-tagged-and-grouped-detached","canonical_anchor":"system-prompt-sections-are-now-tagged-and-grouped-detached","heading":"System prompt parts are now labelled; detached sessions skip some setup","tier":"internal","area":"System Prompt","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.286\/e\/system-prompt-sections-are-now-tagged-and-grouped-detached","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.286","markdown":"### System prompt parts are now labelled; detached sessions skip some setup\n\nClaude Code labels and groups each part of its system prompt, and a new detached mode skips a setup step; the prompt text is the same\n\n**Unclear.** What the labels are used for, and what makes a session detached, is not known.\n\n**What**\n\nThe system prompt is the hidden instructions Claude Code gives the model. It used to be a plain list of parts. Each part now passes through a step that labels and groups it, with group names such as bare, shared, session and memory_static. The text of the prompt itself did not change.\n\nThere is also a new detached option for sessions. When it is set, Claude Code skips a setup step and handles memory in an analysis-only way.\n\n**Why**\n\nThis prepares for tracking each part of the system prompt separately and for sessions that run detached. Nothing Claude reads changes.\n\n- Flag `tengu_silent_harbor`: Off in both readings (read for one account on one subscription tier against v2.1.286; this account: off, anonymous baseline: off, compiled default: off) These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.\n- Flag `tengu_slate_bittern`: Not enough to say (read for one account on one subscription tier against v2.1.286; this account: no value returned, anonymous baseline: no value returned, compiled default: on) These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.\n- Area: System Prompt\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 3\/5"}