Session Handoff [auto-2621]: Count an Unthreaded Entry by Its Title Anchor in pr_review.py (#2621) #2640

Next steps, in priority order

1. Fix pr_review.py Counts a Back-Reference to an Unread Thread as a Finding With No Thread #2621: make unthreaded_entries in scripts/pr_review.py count an open entry by its own title anchor, its first link, rather than by every link the entry carries, matching how carried_open_threads already reads an entry and how Count Linked Entries, Not Links, Against the Open-Findings Total in pr_review.py #2622 changed the open-findings comparison to count entries. Keep the documented overstatement for a title anchor past the hundred threads read and for an unrecognized link. Done looks like: the constructed shape in pr_review.py Counts a Back-Reference to an Unread Thread as a Finding With No Thread #2621 (a title anchor that is a thread, plus a back-reference to an id no fetched thread carries) reads a shortfall of 0, a title anchor naming no thread still reads 1, the docstring states the per-entry reading, and the pull request into develop carries Closes on promotion: #2621.
2. Under scope main or release, promote per the unattended-handoff worker steps, then close this lane out.

External blockers

None known. Decision #2636 is open on pull request #2635 (lane auto-2592), which touches TODO.md only, not scripts/pr_review.py, so it does not block this lane.

Internal dependencies

Step 2 follows step 1, since the promotion carries the develop merge.

State

No branch, worktree, or pull request exists for this lane yet. origin/develop and origin/main were level when this link was written, so a promotion carries only this lane's fix unless another session merges to develop meanwhile. Re-derive both from the remote before starting.

The parked decision queue

1 open: #2636.

What the last round did

Nothing yet. This link was created by the unattended picker from the open backlog.

What not to repeat

Nothing yet.

New learnings

None.