DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.
Recovered background attaches report the same way on both code paths
Under the hood
Useful1Signal2
Sessions
Recovered background attaches report identically whether found by the old or new sweep.
What's wrong with this entry?
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What
The event describing a background attach recovered from its journal moved into one shared function, so the older filesystem sweep and a new storage-backed sweep now produce identical reports.
Details
tengu_bg_attach_outcome carries journal_recovered: true, synthetic: true, attach timing, first frame kind and message counts.
Evidence
tengu_bg_attach_outcome
Strings lifted out of the shipped bundle, so the claim above can be checked against them.