Cursor 2.0 vs Pretty Fish

“The primitive here is genuinely new: a persistent agent that holds task state across your editor session and works asynchronously, not just a fancy autocomplete loop. The DX bet is right — background agent offloads the mental overhead of babysitting a generation without yanking you out of flow state. The moment of truth is kicking off a refactor and watching it run in the background while you write new code; I've done this with raw Claude API calls and shell scripts and it's a bad time. The specific technical decision that earns the ship is the multi-repo context indexing — that's the hard infra problem nobody else has solved cleanly, and doing it at the editor layer rather than a separate indexing service is the right call.”

“The official Mermaid live editor is clunky and slow. Pretty Fish loads instantly, works offline, and the multi-page workspace means I can manage all my architecture diagrams in one place. Bookmarking this immediately as my default Mermaid editor.”

“Direct competitor is GitHub Copilot Workspace, and Cursor 2.0 beats it on editor integration and context depth — Copilot Workspace still feels like a separate webapp bolted onto VS Code. The scenario where this breaks is any long-horizon task that touches infrastructure, auth, or secrets: the background agent runs in a sandboxed context and the moment it needs a credential or an environment variable it doesn't have, the whole async promise collapses into a blocked queue. What kills this in 12 months isn't a competitor — it's Microsoft shipping a credible background agent natively in VS Code with GitHub model access; the moat is editor UX and context indexing speed, and Microsoft can buy both. That said, Cursor's execution lead is real enough to ship today.”

“It's a genuinely nice editor but it's solving a niche problem — most devs who need Mermaid diagrams already use VS Code extensions or embed them in Notion. And with no backend, there's no collaboration or sharing story, which limits its use in team workflows.”

“The thesis Cursor 2.0 is betting on: within 2 years, the primary unit of developer work shifts from writing code to reviewing and directing code — the editor becomes a task queue, not a text buffer. The dependency is that long-horizon agents stop failing on multi-file refactors at the rate they currently do, which requires model reliability improvements that are trending in the right direction but not guaranteed. The second-order effect nobody is talking about is what happens to code review culture when PRs are generated asynchronously while the developer is in a meeting — the reviewing-to-writing ratio inverts, and that changes team structure, not just tooling. Cursor is riding the trend of agent-native development workflows and they are early, not on-time, which is the right place to be building infra.”

“As AI tools increasingly output Mermaid syntax to explain architectures and flows, the need for a great rendering environment grows. Pretty Fish positions itself at the intersection of AI-generated diagrams and human editing — that's a well-timed niche.”

“The buyer is the individual developer on a team budget, and the pricing architecture is smart — the $20 Pro tier gets you in the door but background agent compute burns through usage caps fast enough that teams will rationalize the $40 Business seat, which is where Anysphere's unit economics actually work. The moat question is the one that matters: it's not the model (they use Claude and OpenAI), it's the context indexing pipeline and the editor muscle memory they've built with hundreds of thousands of developers. The stress test is what happens when VS Code ships background agents natively — and it will — but Cursor's bet is that editor-level product velocity and distribution among early adopters creates enough switching friction to survive. That's a defensible bet for 18 months, not forever.”

“Five beautiful themes and clean SVG exports mean I can finally use Mermaid diagrams in client-facing presentations without them looking like developer scratch notes. This is the Mermaid editor I've always wanted and the zero-friction setup seals it.”