ci/woodpecker/pr/ci Pipeline was canceled
Measured defect (2026-08-28/29): tasking sends without -L landed in a stale default-socket TWIN of the target seat; rc 0 reported honest delivery to the wrong pane. Resolution order now: explicit -L > MOSAIC_TMUX_SOCKET (launcher-exported) > unique socket hit; multiple hits refuse with rc 4 naming the sockets. Local targets only; remote pass-through unchanged. Socket test gains arms A (twin session on two sockets -> rc 4 with the socket list) and B (unique session auto-resolves and delivers on the right socket, no cross-delivery). Test remains CI-excluded per its signed exclusion (no tmux in the CI image, #1017).