`abcd implement report` gives each event to the window open when it happened, so a session that joins a second before the first session sets the window's mode is counted in the previous window. In autonomous run A the second session's session_open landed one second before the first session's `implement mode claim --window 2`, and the report lists that session under `single` with no lanes while its one lane, landed, sits under `claim`. Wanted: a join is attributed to the window whose window_mode line follows it within a short grace, or the report names a session whose open and whose work fall in different windows.

abcd implement report gives each event to the window open when it happened, so a session that joins a second before the first session sets the window's mode is counted in the previous window. In autonomous run A the second session's session_open landed one second before the first session's implement mode claim --window 2, and the report lists that session under single with no lanes while its one lane, landed, sits under claim. Wanted: a join is attributed to the window whose window_mode line follows it within a short grace, or the report names a session whose open and whose work fall in different windows.

Grounds

• pursued: a session joining a second before the mode line is reported under the window it joined; a session split across two modes by a sub-minute gap would show it wrong.