benchkeeper 6.25

• App, Sessions board redesigned (#406): a project rail first (newest activity, session count, sparkline, last tier; a chip row on a phone), tiles for sessions, agent time, cost, tokens, tests-pass rate and merged pull requests with a sparkline and the change against the previous period of the same length, the per-day chart stacked by project with a metric switch (cost, agent time, tokens, sessions) and legend chips that hide a series, comparison bars by tier, pattern and setup with the sample size on every bar (under 20 sessions: hatched, marked, left out of the highest and lowest line), cost per merged pull request and model mix by week, histograms of agent time and turns, a 12-week activity calendar with active days and longest streak, and branches and pull request states of the chosen project. Own design tokens (radius, shadow, glow, a six-color series palette checked at 3:1 in light and dark, monospace tabular figures, reduced motion). Same rows as before: no new field, no message text, no network request.
• Breaking, before 7.0: the per-day chart is stacked by project, not by setup (the setup comparison moved to its own bars); the rail has no all-directories toggle (#404 adds it to the Project select).
• Plugin version 6.25.0.
• Upgrade: npx benchkeeper@6.25.0 apply.