What
Claude Code now tracks the last time each plugin was used (lastUsedAt and lastUsedNumStartups). This data enables the tip system to surface a warning when a plugin hasn't been used in a while.
Details
- Tip shown: "You haven't used the [plugin] in a while. It still adds startup and context cost — review it with…"
- Tracks both calendar days and session count since last use
Evidence
Plugin usage tracking functions (search for "plugin in a while. It still adds startup and context cost")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.