5e3fb4229d
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The claim test disposed its sessions, which may leave them to time out rather than raise SessionClosing, so only the SessionCreated half of the SDK's session-headroom overwrite was proven. Sessions now close explicitly, a later level (230, inside the SDK's >= 200 overwrite band for every case, where the old level-10 left the 200 case at 190 and so unexercised) is read back on a surviving session after another one closes on its own. Probed without the claim: the close-only read fails (255) in all three cases. Claude-Session: https://claude.ai/code/session_01GT67ACmpMR7b9LGRPLijMi