Whiteboard vs Warden vs gstack
Side by side, from each listing’s own data. A row where every column says the same is shown once, dimmed.
 Whiteboardby /dev/fastRemove Whiteboard from this comparison |  Wardenby SentryRemove Warden from this comparison |  gstackby Garry TanRemove gstack from this comparison | |
|---|---|---|---|
| Sets it apart |
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| What it is | Gives coding agents like Claude Code and Codex a desktop canvas to draw code reviews, diagrams, and decision logs linked to the code, via a local CLI and MCP server. | AI code review agent from Sentry — define review skills in Markdown, run locally before pushing or auto-trigger on every PR via GitHub Action. Built-in security-review and code-review skills included. | Adds sprint-style slash-command skills to Claude Code and other agents for planning, review, QA, and shipping, plus a bundled headless Chromium browse daemon. |
| Provider | /dev/fast | Sentry | Garry Tan |
| Official vendor | Not an official listing | Sentry | Not an official listing |
| Verified | YesSame for all | ||
| Access | MCP, CLI | CLI | CLI |
| Auth | NoneSame for all | ||
| MCP server | In its setup guide | No MCP server | No MCP server |
| CLI install | In its docs | npmnpm install -g @sentry/warden | In its docs |
| Skills | Review Authoring, Scratchpad Diagrams, Trace Archaeology, Semantic Diff Viewer | PR Security Review, Custom Skill Authoring, Local Pre-Push Check | Browser Driving, QA Testing, Code Review, Ship And Deploy, Shared Browser Pairing |
| Streaming | NoSame for all | ||
| Push notifications | NoSame for all | ||
| Categories | Code & DevTools | Code & DevTools, Security | Code & DevTools, Browser & Computer Use |
| Tags | code-review, diagrams, desktop-app, local-mcp, claude-code, codex, agent-traces, open-source | code-review, security-review, pull-request, github-action, sentry, ai-code-review, markdown-skills | claude-code, agent-skills, code-review, browser-testing, headless-chromium, release-workflow, open-source |
| Listed since | Sep 25, 2026 | May 20, 2026 | Oct 4, 2026 |
| Use it now | |||
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