Under the hood
Useful2 Signal4
Artifacts can now be stamped as co-written with an optional title, with no switch you can flip.
A co-written marker and title field exist in artifact metadata, stamped only by code and exposed nowhere.
What's wrong with this entry?
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What
Stored artifact metadata now carries a co-written marker and an optional title, read back alongside the existing mode, shared-live and probe-failure fields. It is stamped only when the code writing the artifact asks for it, and there is no user-facing switch.
Evidence
cowritten
Strings lifted out of the shipped bundle, so the claim above can be checked against them.