Development record

The auto-plan's checkout digest runs its git commands with no deadline: gitutil.RunWithIndex and gitutil.StreamWithIndex (internal/gitutil/index.go) and, above all, checkoutDigest's `add -A` through pickGitIndex (internal/core/implement/loop/autoplan.go about line 207, pickcommit.go about line 167), which runs the person's configured content filters. Unlike the bounded runner in internal/gitutil/bounded.go, a stalled filter or git holds the digest, and the implement step taking it, with no limit.