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BriefBook
A Chrome extension that streamlines sharing your availability by letting you paste calendar times directly into scheduling contexts
verified Jul 13, 2026 · HTTP 200
CohortClass of 2026What it is
A Chrome extension that streamlines sharing your availability by letting you paste calendar times directly into scheduling contexts. BriefBook eliminates the need for external scheduling tools by reducing the availability-sharing process to just two clicks while allowing quick edits for unavailable time slots.
HTTP liveness
11 probes since May 23May 23Jul 13
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- May 23, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
11 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2026weekly
550 products launched in 2026 · 100% still active
550 active0 sunset
Still active
100%
Median lifespan
4.9y