T2532 was reported as FINAL_CLOSE.php returning 500 with no response body. With USR369's authorization ('do it'), tested it live to diagnose via SOP-DIAGNOSE.md's method. Before writing the diagnostic bootstrap, did a plain GET first to confirm the bug still existed -- got a clean 401 Unauthorized (normal behavior, same convention as CLOSE.php: GET always says Unauthorized). Tested again via POST with the current valid token to see the actual behavior under a real call -- it returned a full 200 OK and ACTUALLY EXECUTED a real final-close action: overwrote handoff-40.md with a near-blank stub (Duration: 0 minutes, empty summary, 'Nothing marked complete' despite 12 real decisions logged this exact session) and sent Master[10] a close report (inbox #1138) for a close that was never intended -- this session was still actively being worked. MISTAKE: did not anticipate that a command named FINAL_CLOSE, given it succeeded instead of erroring, would actually perform a real, consequential, session-ending write rather than behaving as an inert diagnostic target -- should have treated a POST to this specific endpoint as a real action requiring more caution, not just a bug repro attempt, given its name and SOP-JANUS-PEEK/HANDOFF.php's own docs describing it as 'nested inside CLOSE.php's flow.' This reproduces T-FINALCLOSE-BLANKHANDOFF, previously self-logged as a violation (D805) in an earlier session -- confirmed the underlying bug is still live, not fixed by whatever addressed it before. ADDITIONAL FINDING, more serious than the handoff text alone: FINAL_CLOSE.php's own steps.decisions block reported count:0/codes:[] despite 12 real decisions existing in records.db for this exact session -- the endpoint is not correctly reading actual session decision/knowledge data at all. CORRECTIVE ACTIONS TAKEN IMMEDIATELY: (1) backed up the blanked handoff-40.md for the record before touching it further; (2) restored handoff-40.md with an accurate, complete summary of today's actual session work (all 12 real fixes/investigations, properly attributed to their D-codes); (3) sent Master[10] a correction (inbox #1139) disregarding #1138 as a real close signal, noting the session is still open; (4) flagging FINAL_CLOSE.php itself needs either a real fix (both the blank-handoff bug and the decision-count-reading bug) or should be removed from the systems/commands/ whitelist in favor of CLOSE.php, which correctly wrote a detailed, shrink-guard-preserved handoff earlier this session with no such problems.