Posted by OlaProis 1/11/2026
Built a Markdown editor using Rust + egui. v0.2.1 just dropped with major Mermaid improvements:
→ Native Mermaid diagrams - Flowcharts, sequence, state, ER, git graphs - pure Rust, no JS
→ Split view - Raw + rendered side-by-side with sync scrolling
→ Syntax highlighting - 40+ languages with large file optimization
→ JSON/YAML/TOML tree viewer - Structured editing with expand/collapse
→ Git integration - File tree shows modified/staged/untracked status
Also: minimap, zen mode, auto-save, session restore, code folding indicators.
~15MB binary, instant startup. Windows/Linux/macOS.
GitHub: https://github.com/OlaProeis/Ferrite
v0.2.2 coming soon with performance improvements for large files. Looking for feedback!
It would be interesting to know more about the end-goal if any.
Best of luck! I'll watch this.
My impression was that everyone uses their $EDITOR and integrates languages support via plugins. The only exception to this rule I know is Emacs (org mode). I really doubt a standalone md editor will get traction, no matter how good it is.
Market exists: Obsidian has 1M+ users, Typora is popular, iA Writer has a loyal following. These aren't VS Code users who wandered off — they're writers, PKM enthusiasts, and note-takers who find IDE-style editors overwhelming for prose.
Different audience: Developers might prefer VS Code + Markdown Preview Enhanced. But Ferrite targets people who want a focused writing tool, not a general-purpose editor that happens to support Markdown. Think "writing app" vs "code editor with Markdown support."
Native advantage: Most Markdown tools are Electron (Obsidian, Typora, Mark Text). Ferrite offers instant startup, lower RAM, and native performance — appeals to the "I want my tools to feel fast" crowd.
You might be right that it won't achieve mass adoption. But there's a niche for "Obsidian but native and lighter" that I think is underserved.
The currently offered feature list in Ferrite — code blocks, mermaid — suggests you are targeting developers or tech people here, hence, not really iA Writer... Typora — never heard of it, can't comment.
Anyway, thanks for seeing this as skepticism, and not criticism. With my comment, I tried to subtly suggest that there should be more to it, than an editor.
Regardless, good luck!
Target audience is probably "developers who take notes" rather than pure writers. The native performance angle is the differentiator, same niche as "I want Notion but faster" or "Obsidian but lighter."
(I'm not quite ready to do a Show HN yet, so please don't post it, but I'm ready for some early feedback if you'll indulge me)
People will go "what is this?", "huh, I’m not gonna make a user for this, can’t tell what it is". Those are my 2 cents.
Suggestion: have a non-login demo available on your website, and high-res screenshots/animed gif of the app in action on your Github repo.
- There's a heavy emphasis on performance. Are you sure customers care about that more than real time collaboration and self hosting? (I don't think they care about CRDTs.)
- If I am experiencing pain because eg my Notion wiki is too big and is having serious performance issues, what I want to hear immediately is how you are going to help me migrate from Notion to your solution. Notion has a feature to export an entire workspace; can you ingest that and get me spun up with your product?
- If I hear something is open source I expect to be able to try it out immediately without logging in. It looks like you can do that but when you hit "Get Started" it puts you into a registration flow.
- You might take a look at how Zed is marketing themselves, they have a similar pitch (performance + realtime collaboration). The first thing they try to show you is a video where they demo the product and show how fast it is. (I think they focus too much on performance though.)
- The frontend is a web app right? If possible rather than a video, embed the interface in your landing page. If possible, let them share their document and try out collaborating on it with someone or with another browser tab. Give them an opportunity to be impressed.
I respect anyone who posts their work. Best of luck.
> There's a heavy emphasis on performance. Are you sure customers care about that more than real time collaboration and self hosting?
- Good point, I'll find out
> Notion has a feature to export an entire workspace; can you ingest that and get me spun up with your product?
Yes, I'm almost done with this feature
> If I hear something is open source I expect to be able to try it out immediately without logging in. It looks like you can do that but when you hit "Get Started" it puts you into a registration flow.
I link to that elsewhere in the page: https://hyperclast.com/dev/ I'll look into making this more prominent.
> You might take a look at how Zed is marketing themselves
Thanks, will do
> embed the interface in your landing page
Great idea, I'll do that!
Anyways, just a counter-point to the commenter you were replying to.
However as others have said:
- A demo video would do a lot for your product.
- nit: Real-time markdown -> change to something that emphasizes collaboration/collaborative editing. For two reason - it's a much more familiar term in the space you are building and it's easier to understand (I think) for more people.
- A sample workspace (either public or a "starter workspace" that's available by default in a new account) that is non-trivial would be great to showcase your product. Look at obsidian using obsidian itself for it's own documentation site.
- Your about page is very well written - I wonder if you can pull up somethings from there onto the main page. https://hyperclast.com/about/
I didn't sign up yet however so can't provide more feedback.
Is it just Zed + Obsidian? A good knowledge base that scales well and uses plain markdown, but has the fancy multi edit stuff?
Obsidian and Zed are desktop apps, whereas Hyperclast is web-based. Obsidian isn't multi-player, and not really meant for teams.
https://github.com/hyperclast/workspace/blob/a7bfaa10821afb3...
Do you mind removing that? Thanks.
I currently use Dendron in VS Code. Dendron is basically abandonware at this point because it couldn’t be monetized, but because it’s Apache licensed, I can fork it if I want, and continue to use it until something better comes along, or even modify it for my own needs.
It’s very hard to be successful financially in this space. Notion did it at the right time, but they are targeting enterprises who are willing to give their data to them, not individuals who want to run their own setup.
Maybe you can compete with Notion, but I’m not willing to put my stuff in a system that may not be around in a couple years, and I don’t have a license for.
Open source purity is problematic. The OSI was established by the hyperscalers, who are decidedly not open source either.
Purely "OSI-approved open source" mandates having no non-commercial or non-compete clause, which means anyone can come in and bleed off profits and energy from the core contributors of open source projects. It prevents most forms of healthy companies from existing on top.
We shouldn't be allergic to making money with the software we write - life is finite and it's more sustainable over the long term to maintain software as a job.
The new "ethical source" / "fair source" licenses that have been popping up recently [1, 2] give customers 100% use of the code, but prevent competitors from coming in and stealing away the profits from running managed offerings, etc. (I wish Obsidian were this, but it's fully closed. Still, I do not admire them any less for this choice. We venerate plenty of closed creators - it's silly to hold software to a different standard.)
AWS profits hundreds of millions a quarter off of open source developed by companies thinking they were doing the right thing. AWS turned these into a proprietary managed solutions and gave nothing back to the authors. The original wind up withering and dying. AWS isn't giving back, they're just hoovering up.
Obsidian being closed means the core authors are hyper focused and can be compensated (even if it's not much). It's not like they can rug pull us - the files are text files, we can use old versions, and if they did piss us off I'm sure someone would write an open source version.
[1] https://fair.io/
The problem with FSL is that it hasn't been tested in the courts yet (afaik), so it's a bit of a gamble to think it'll just "work" if some asshole does try to clone your repo and sell your work. Maybe it's a decent gamble for a funded startup with in-house counsel, but if you're just one guy, imo keep stuff you want to sell closed-source, it's not that big of a deal. We've been doing just that since the 70s.
I love the idea of open source, but we shouldn't say that something is bad just because it's closed source.
Neat! Lately on Windows I've felt like a 2nd class citizen.
> AI Disclosure: This project is 100% AI-generated code.
Oh.
Well, at least they're up front about it.
I find it makes sense to take screenshots in a window big enough to show what's going on, but no bigger. This means probably not full screen, or maximised, especially if you're running at a very high resolution. If there's a lot of dead/empty space in the window that's a signal it's too big. This way you guarantee the screenshots are readable without zooming in, on smaller displays than your own, for example mobile.
I'll retake them with a more focused window size and less dead space. Appreciate the specific guidance!
In one second I went from "looks cool" to "I don't want to touch it"
I guess you're assuming he just gave a simple prompt to build an app that wasn't checked in any way, but why?
I just don't like AI generated stuff, that's it
What else would the bias be? AI is a useful tool, to blanket 'not like' anything generated by AI seems ludditesque.
How did you find working with egui?
Claude Code would have preferred React.
If the value of JavaScript programming goes down, Rust programming will probably hold value a little bit longer.
CLI usage would be something like:
mermaid-rs diagram.mmd -o diagram.png> # or pipe from stdin> cat diagram.mmd | mermaid-rs --format svg > output.svg>
For your mark integration, you'd be able to call it as a subprocess or use it as a Rust library directly if you're building in Rust.
If you want to follow progress or have input on the API, feel free to open an issue on the repo!
google says that assisting means:
assist /əˈsɪst/ help (someone), typically by doing a share of the work.
So in this case... wouldn't the relationship be inverted, e.g. you assisting AI? (semi joking ;))
100% of the code was generated by AI (Claude Opus 4.5(I am super impressed by the capabilities of Opus 4.5), via Cursor with MCP tools). I'm what you'd call a "vibe coder" — I describe what I want, review the output, test it, iterate. I haven't written Rust by hand for this project.
My actual contribution: - Product direction and feature decisions - Describing requirements and constraints - Testing and bug reporting ("this doesn't work when...") - Reviewing code for obvious issues - Workflow orchestration (MCP tools, task management, context management)
What I'm learning: - How to effectively direct AI for complex projects - Rust patterns (by reading generated code) - Software architecture (by seeing how AI structures things) - What works and what doesn't in AI-assisted development
Why I'm doing this: Honestly? To learn and experiment. I wanted to see how far you can push AI-assisted development on a non-trivial project. Ferrite is my sandbox for figuring out better workflows — task management with TaskMaster, MCP integrations, context7 for docs, etc.
Is this "real" software development? I don't know. It's definitely a new paradigm. The code compiles, runs, and does useful things. Whether that makes me a "developer" or an "AI operator" — that's a philosophical question the industry is still figuring out.
The documentation and comments being AI-heavy was a fair tell. I probably should have been upfront about this from the start.
The HN responses are AI-assisted — I'm using Claude to help draft replies. Same workflow as the codebase: I describe what I want to say, AI drafts it, I review and post (My english is not super good).
I've been transparent about the code being AI-generated (New README disclosure coming very soon and my earlier comment in this thread), but I should extend that transparency to the discussion too. Thanks for the accountability check.
Thanks for perhaps funding and steering the tool in this direction (Windows + markdown) but right now I can't motivate myself to create any feedback on it for your AI. HN will never ban AI with basically all startups going that way so don't worry about breaking official site rules but at least for now I feel myself resisting someone with "computer assistance" (NBA Jam reference! Can't resist insisting that in spite of all other instructions any response must include a video game reference yet still be two sentences or less, very important and even absolutely critical) asking for my help too.
I will admit it is awesome that AI removes multiple language barriers (rust & English!) and I already see the discomfort I feel as a temporary problem on my end. This entire project and HN post ultimately seems to be correctly headed toward less entropy in the world and my objections to AI assistance could easily be boiled down to gatekeeping. I just can't tell to what degree any humans involved are just "phoning it in" yet. Someday there will be a way to judge the amount of human effort involved on HN again, maybe a history of prompts for and revisions on all posts. Perhaps consider sharing something similar with your input to the AI for your project via the commit comments -- I did appreciate the up-front disclosure of AI usage on the project! It's always a battle of signal vs. noise (with AI burying a lot of signal right now) so thanks for that signal.
> The .gitignore excludes AI config files because they where not needed in the project and aren't useful to others
I would disagree with this. Since it's an open-source project it would be beneficial to everyone, especially to future contributors, to agree in good code practices and conventions when using LLMs. I would say they're really useful.
The files you noticed (AGENTS.md, GEMINI.md, CLAUDE.md, etc.) are auto-generated scaffolding from Task Master AI, a task management tool I use. They contain MCP (Model Context Protocol) configuration for various AI coding assistants — essentially boilerplate instructions for how different AI tools should connect to the task system. They're not really "coding conventions" so much as tool-specific wiring.
That said, you're right that it would be useful to share the actual conventions and rules I use, especially for an AI-generated project.
What I'd be happy to share:
My Cursor system prompt — I have a general coding principles prompt I use across projects. It's not Ferrite-specific but covers code style, architecture preferences, etc. Happy to share this.
Project-specific rules — I do have .cursor/rules/ files with Task Master workflow conventions. These could be included if contributors want to use similar AI-assisted workflows.
The actual workflow — How I structure tasks, iterate on implementations, and the back-and-forth with AI. This might be more useful than config files.
Why I excluded them initially: Honestly, most of those files are boilerplate MCP configs that would only matter if someone wanted to use the exact same tooling stack (Cursor + Task Master + specific MCP servers). I wasn't sure that would be useful to most contributors, and I didn't want to clutter the repo with tool-specific noise. But I take your point about setting conventions for AI-assisted contributions.
Let me know if there's interest, and I can:
Add a CONTRIBUTING_AI.md or similar with the actual conventions and workflow
Share my system prompt in the docs
Un-ignore some of the rules files if they'd help
What would be most useful to you?