Code · Vendor site 2026-10-04
Whiteboard by /dev/fast is an open-source, MIT-licensed canvas for thoughtful software development. It helps engineers visualize diffs, search code with architectural context, copy selections for coding agents, and review agent trajectories from one interface on macOS, Windows, and Linux.
Engineers reviewing large agent-generated diffs who want architecture-level visualization instead of raw line-by-line patches.
Whiteboard is labeled beta on the site; additional /dev/fast executables such as trajectories and merge-bot require separate contact or alpha access.
/dev/fast Whiteboard combines diff visualization, code search, and agent handoff flows so teams can critique software changes at an architectural level.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Whiteboard focus | Site describes Whiteboard as a canvas for thoughtful software with semantic diffs, search, and agent trajectory review. | Facts sourced | 2026-10-04 |
| Distribution | Marketing offers macOS, Windows, and Linux downloads plus view-source links on GitHub. | Facts sourced | 2026-10-04 |
Understand the total cost
Free
Free
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Explore toolThe practical questions
Whiteboard by /dev/fast is an open-source, MIT-licensed canvas for thoughtful software development. It helps engineers visualize diffs, search code with architectural context, copy selections for coding agents, and review agent trajectories from one interface on macOS, Windows, and Linux.
Homepage advertises open source MIT licensing with downloadable desktop apps and a public GitHub repository.. This record lists ongoing free access; check the plan limits before starting.
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Whiteboard documents a proposed diff search API for parse, hydrate, and postprocess workflows in project materials.. API access and subscription access may have different terms; consult the linked sources.
Whiteboard is labeled beta on the site; additional /dev/fast executables such as trajectories and merge-bot require separate contact or alpha access.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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