You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SubagentsArea: what it touches
Bug FixesKind: in v2.1.246,
Bug FixesSection of the release
What
When a background or subagent run reattaches to a task that already exists, its tool-use count and recent activity line are restored from the existing record rather than starting from scratch, so the progress display continues where it left off.
Details
Already-seen tool-use ids are re-registered on reattach so they are not counted twice.
Unconditional on that path.
Evidence
recentActivities
Strings lifted out of the shipped bundle, so the claim above can be checked against them.