Multiple /system calls now accumulate instead of replacing. After each call, fragments are condensed into one coherent override via Haiku (claude-haiku-4-5-20251001). Most recent instruction wins on conflicts. Falls back to newline concatenation if LLM call fails or ANTHROPIC_API_KEY is unset. Both condensed result and raw fragments array are stored with the same TTL; clear deletes both keys. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>