CC 2.1.153/154 adoption sweep

A cron auto-filed 24 issues. This PR triages all of them: implement the genuine docs, close the rest with rationale. One PR, every issue accounted for.

Issue	Feature	Bucket	Disposition

Each issue is closed via this PR's closes #N (keyword per issue). Buckets verified against merged source by a recon agent; N/A = CC-internal fix with no ork skill/hook/doc surface.