{"version":"2.1.257","anchor":"new-system-prompt-snapshot-cliagent-option","canonical_anchor":"new-system-prompt-snapshot-cliagent-option","heading":"New --system-prompt-snapshot CLI\/agent option","tier":"use","area":"System Prompt","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.257\/e\/new-system-prompt-snapshot-cliagent-option","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.257","markdown":"### New `--system-prompt-snapshot` CLI\/agent option\n\nA new --system-prompt-snapshot option makes a session record its system prompt once and reuse it on resume.\n\nA new flag, `--system-prompt-snapshot <on|off>`, is now passed to spawned agent and subagent processes and threaded through session state as `systemPromptSnapshot` across many call sites. It lets a forked or background session record the system prompt once and reuse it verbatim on resume or subsequent requests, instead of recomputing it live. It defaults to on for the built-in system prompt and off when `--system-prompt` or `--append-system-prompt` is passed.\n\n- Area: System Prompt\n- Tier: Use it now\n- Useful: 5\/5\n- Signal: 4\/5"}