D366 — Three doctor-only checks gain their mechanical part, and join the default auto-repair

Decision. index_lists_retired carries drop_index_entry, link_to_retired carries retarget_links and title_quality carries set_value title, each only where the result is unique. All three are AutoRepairSafe and in config.DefaultAutoRepair, so the background repair applies them like duplicate_link.

Why. On an imported KB every info finding waited for a kb-doctor session that may never come, yet part of three checks needs no judgement: the doctor skill itself says "remove the entry" for a retired concept in an index, a retired concept with a live superseded_by has an obvious place for its links to go, and a title's decorative characters have one stripped form. The rest of each check stays judgement (D356: no invented content).

Alternatives rejected. - Leave them to the doctor. Keeps the findings forever on a KB nobody runs the doctor on. - Retarget to a successor of a successor. A chain A to B to C where B is retired is judgement (B may be retired for a reason that does not transfer); only one hop to a live concept is applied, and B's own finding retargets its linkers when it is its turn. - Drop an index line that cites other concepts. The other links may be the reason for the line; same rule as concept_archive: only a line whose single link is the retired concept. - One finding per index with several fixes. A finding carries one Fix; one finding per retired concept keeps that and lets each be accepted or skipped on its own. - Emit the link finding on each linker. It would break D313 (one decision, one finding, accepted on the retired concept).

Consequences. Fix gains targets (the concepts a fix edits when they are not the finding's own, used by retarget_links), so Fix is no longer comparable with ==. The default auto_repair list grows by three checks: a KB relying on the default gets these repairs on the next heartbeat, in one revertible commit; auto_repair: [...] opts out per check. index_lists_retired findings are now one per retired concept listed, not one per index. Rewriting links never drops an edge (D309); every fix is idempotent on its own output (D355).