A running agent was visible on the board and nowhere else, so switching
tabs — the normal thing to do while one works for minutes — left bench
saying the same string whether three agents ran or none.
The count now leads the title (`2◌ · bench · bench`), ahead of even the
project: the reasoning that put the project first (truncation eats the
tail) applies harder to the one state you want from a tab you are not
looking at. The mark is the in-flight glyph the CI and copilot chips
already wear, not an emoji, and a quiet board keeps the plain title byte
for byte.
Both the tab and the header chip now count through one runningAgents(),
so they cannot disagree, and the title is written only when the string
actually changed — render() runs on every SSE frame.
Behaviour is covered in node (skipped where node is absent); the wiring
that keeps one filter and one writer is a source-level invariant, as
elsewhere for board.html.
istos
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