Development record

2026-10-31 — spc-2609202134338445 step 11, fix round 3: the auto-plan's checkout digest copies the checkout's index only when the index path is a regular file, opened without following a link or waiting on a pipe, and at most 1 GiB; otherwise it folds in a value unique to the call, so the digest never matches again and the lane is handed back. Grounds: a link to an endless device or a named pipe at the index path would fill the scratch volume or hold the step; 1 GiB is well past the index of the largest checkouts in use, which run to hundreds of megabytes; handing the lane back is the outcome that vouches for nothing it did not read.