CC[100]'s FINAL_CLOSE (msg 1119) reported Daily[50] still writes handoff-05.md (real content, 08/22 3:50am) alongside the correct handoff-50.md -- a write path still resolving Daily as retired code 05. Traced the actual write path: save.php doesn't touch handoff files at all (only LEGACY append). HANDOFF.php (systems/commands/, nested inside CLOSE.php's flow) had the exact same retired-code $sys_dirs map, but its header comment shows Builder[20] already fixed it TODAY (08/22/26) to use correct decade-code keys directly -- live-tested just now: HANDOFF.php?system=05 now correctly returns {status:error, unknown system code} instead of writing anything. CLOSE.php's own $decade_code is derived from resolve_system()/roster_lib.php (verified correct behavior empirically all session for system=40) not a local map, so CLOSE.php was never the source either. CONCLUSION: this specific bug is already fixed (by Builder[20], same day, likely shortly after CC[100]'s report went out) -- the existing handoff-05.md file on disk is a leftover artifact written before that fix landed, not an ongoing issue. Did NOT delete/mark it -- BACKUP.php blocked on TASKGATE not having been called for system=50 (Daily's own identity) within the required 20-minute window, and this is a cosmetic leftover on another system's file, not worth pursuing further with additional cross-system TASKGATE calls for a non-bug. Also note: HANDOFF.php still has an unused, dead $decade_code/$decade_map variable pair (lines 60-63) left over from before Builder's fix -- harmless (nothing currently reads a wrong value from it that I could find, DASHBOARD ping and set_sync_status calls use it but with now-correct fallback behavior since the old map simply doesn't have most current decade codes as keys, so $system passes through via the ?? fallback), but worth a cleanup pass at some point to remove the dead retired-code map entirely rather than leave it as a landmine for the next person who reads it and assumes it's load-bearing.