Copies the reviewed baseline-canonical SDK1 port and replaces its 1..4-cycle smoke entry with the late-slope
loop (same cycle body, every-fourth-cycle active restart, 30/25/120 s bounds, 7200 s phase, cycle-3 cold
baseline with unchanged +64 MiB managed / +128 MiB RSS / +32 descriptor caps, latched first rejection,
bounded shutdown checks). Run against the immutable efb9197a publication (#807 fix included), never rebuilt.
The held-reference closed-session list assertion is recorded instead (SDK1 Close keeps lists until Dispose,
per OWNERSHIP.md) and the managed-monotonic guard is latched, so the comparator yields numbers for the whole
phase. acceptance=false by construction. Windows descriptor observer shared byte-for-byte with the SDK2 test.
Claude-Session: https://claude.ai/code/session_01GT67ACmpMR7b9LGRPLijMi
Joseph Doherty