A lane's worktree and branch are cleaned up only by a final 'abcd implement step' run after its pull request merges, and nothing runs it: the land stage waits (exit 3) until the merge, the drain records the lane as 'pull-request' and moves on, and no hook, drain move or schedule comes back. On 2026-10-09 all 18 overnight drain lanes sat merged but still at the land stage, their worktrees in the store and their runs counted as building on the status board (iss-2610090824041378). The step was also refused when it was finally run, because the run's pacing window had elapsed ('nothing before 14:36Z'), so even finishing a merged lane waits hours.

A lane's worktree and branch are cleaned up only by a final 'abcd implement step' run after its pull request merges, and nothing runs it: the land stage waits (exit 3) until the merge, the drain records the lane as 'pull-request' and moves on, and no hook, drain move or schedule comes back. On 2026-10-09 all 18 overnight drain lanes sat merged but still at the land stage, their worktrees in the store and their runs counted as building on the status board (iss-2610090824041378). The step was also refused when it was finally run, because the run's pacing window had elapsed ('nothing before 14:36Z'), so even finishing a merged lane waits hours.

Grounds

• pursued: merged drain lanes no longer sit at land with their worktrees in the store after the next drain move; shown wrong if a lane whose pull request merged is still at land, its worktree present, after a drain move that followed the merge