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Show HN: Most Hated Tools
Show HN: AgentRun: DSL to turn agents into workflows
Hi HN,<p>I just open sourced the DSL that our harness in grep.ai uses to turn repeatable parts of agent work into workflows. You can combine tool calls, code, Jev-powered system one decisions for things like routing and screening evidence, and agents when a step needs more investigation.<p>Our harness uses the traces and retro notes agents leave behind when doing a job to figure out which parts can become a workflow. The idea is to make the work easier to understand and avoid paying for a full agent loop where one isn’t needed.
For example, a research workflow can split a question into subquestions, send agents to research them in parallel, use Jev to screen the evidence, and have another agent write the report. You can inspect the steps, evaluate the evidence screening separately, or change one agent without rebuilding everything.<p>The DSL and examples are in our GitHub. There’s a scripted demo you can run without API keys: <a href="https://github.com/Parcha-ai/agentrun" rel="nofollow">https://github.com/Parcha-ai/agentrun</a><p>You can also use it as a Pi extension to build, inspect, and run workflows: <a href="https://github.com/Parcha-ai/agentrun#use-it-in-pi" rel="nofollow">https://github.com/Parcha-ai/agentrun#use-it-in-pi</a><p>I would love to hear if this is useful to others.<p>More background on how AgentRun works in this video: <a href="https://www.youtube.com/watch?v=vOVhtGjtwpg" rel="nofollow">https://www.youtube.com/watch?v=vOVhtGjtwpg</a>. Or read about our use cases in this article: <a href="https://x.com/MiguelriosEN/status/2101029313906987422" rel="nofollow">https://x.com/MiguelriosEN/status/2101029313906987422</a>.
Show HN: Make math automatic with Mathy
<a href="https://mathy.game/" rel="nofollow">https://mathy.game/</a><p><a href="https://mathy.game/app" rel="nofollow">https://mathy.game/app</a><p><a href="https://apps.apple.com/us/app/mathy-build-math-automaticity/id6804888736">https://apps.apple.com/us/app/mathy-build-math-automaticity/...</a>
Show HN: Doom or Bloom, map your AI worldview
Map your AI worldview by answering a few questions, and see how you compare with others.<p>only takes a few minutes && free & open source && private by default && powered by Jev<p>I think this is a really important question for everyone to be asking themselves, and my hope is that this lil project helps to move our conversations around AI futures in a more balanced, productive direction.
Show HN: Air-gapped file encryption as self-decrypting HTML page
Air-gapped file encryption packed into a single, self-decrypting HTML page. Repo: <a href="https://github.com/ApelegHQ/ts-cms-ep-sfx" rel="nofollow">https://github.com/ApelegHQ/ts-cms-ep-sfx</a><p>I was inspired by self-extracting archives. I wanted to share files with basically no dependencies. The goal was:<p><pre><code> 1. Something that didn't require any installation (assuming a web browser)
2. Have a single file with no network that could self-decrypt
3. Be fully auditable
</code></pre>
The second point is done by having (sort of(*)) reproducible builds and embedded OpenPGP signatures.<p>The first point is made by cleverly manipulating the HTML structure so that it can decrypt without breaking the PGP signature. It can even decrypt using bare openssl (which was a design goal too, though getting the exact structure right took some work and bug reports).<p>The third point is accomplished by the first two, and by the source being freely available.<p>(*) Depends on the OS at the moment.
Show HN: Jev Plays Pokémon Red
Hey HN! Wanted to share a fun project I've been hacking on. Given Jev can make decisions really fast (but not fast enough to play Doom yet sadly), I wanted to try and push it to play a more complex game than Tetris. So I went with Pokémon.<p>I've spent endless hours playing this game as a child so building this was a ton of fun.<p>I open sourced everything in case you want to hack on it yourself here: <a href="https://github.com/christianmat/jev-pokemon" rel="nofollow">https://github.com/christianmat/jev-pokemon</a><p>The game is being streamed live including the tokens and cost - hopefully we get all the badges and don't get stuck in a cave :)
Show HN: Treepeat – Code similarity detection using Tree-sitter
treepeat is a tool that finds similarities in your codebase.<p>Find duplicate code blocks meaningful to the language (classes/functions), not just lines.<p>Find near-duplicates: ignore whitespace, strings, high level AST nodes such as function and names.<p>Find structurally similar code: anonymize identifiers, constants, etc.<p>Pull requests welcome: This is very much an proof of concept - I'm happy with it, but I haven't supported very many languages at present.<p>Languages supported: astro, bash, css, go, html, javascript, lua, markdown (plus codeblocks), python, sql, typescript, java, kotlin, rust, yaml
Show HN: Treepeat – Code similarity detection using Tree-sitter
treepeat is a tool that finds similarities in your codebase.<p>Find duplicate code blocks meaningful to the language (classes/functions), not just lines.<p>Find near-duplicates: ignore whitespace, strings, high level AST nodes such as function and names.<p>Find structurally similar code: anonymize identifiers, constants, etc.<p>Pull requests welcome: This is very much an proof of concept - I'm happy with it, but I haven't supported very many languages at present.<p>Languages supported: astro, bash, css, go, html, javascript, lua, markdown (plus codeblocks), python, sql, typescript, java, kotlin, rust, yaml
Show HN: An open-source manufacturing ERP/MES/QMS
Show HN: How long do I need to work at my salary before I can coast, or retire?
I made a financial planning tool in a couple hours that can model various stages of life and potentially guide job searching and work timelines.
Show HN: Koi.rest – watch some fish and regain your balance
Hi there. My name is Paul. I’m a developer, an explorer and I’ve got ADHD. As of the beginning of August, I’m also unemployed.<p>This last part, along with everything else this past year, has caused me a great deal of stress.<p>While our balcony zen garden project is yet to be completed, I had an idea to create a virtual one that everyone can use.<p>It's an idea that, unfortunately, I’ve been postponing for a while now, mostly because I have no fucking idea how to do it as I don’t know JavaScript, and I don't have the capacity to learn it right now.<p>So I let perfect be the enemy of good and, well... just kept the idea to myself.<p>Then I said "fuck it" and used AI to make the thing I really wanted to make.<p>I realized I didn't want "perfect". I wanted "good enough".<p>I tweaked, added, removed, drew, researched, questioned, tested... I just wasn't the one coding it.<p>So now, instead of occupying my brain, it now lives on the internet for others to enjoy.<p>Yes, there’s something noble about making something entirely on your own, but what good is an idea that just sits in my head?<p>So here I am. I made the thing. The weird, little, quiet koi pond.<p>The silly project of passion. The little corner of the internet to let strangers watch fish quietly, together.<p>I hope this pond helps you as much as it helped me.
Show HN: Koi.rest – watch some fish and regain your balance
Hi there. My name is Paul. I’m a developer, an explorer and I’ve got ADHD. As of the beginning of August, I’m also unemployed.<p>This last part, along with everything else this past year, has caused me a great deal of stress.<p>While our balcony zen garden project is yet to be completed, I had an idea to create a virtual one that everyone can use.<p>It's an idea that, unfortunately, I’ve been postponing for a while now, mostly because I have no fucking idea how to do it as I don’t know JavaScript, and I don't have the capacity to learn it right now.<p>So I let perfect be the enemy of good and, well... just kept the idea to myself.<p>Then I said "fuck it" and used AI to make the thing I really wanted to make.<p>I realized I didn't want "perfect". I wanted "good enough".<p>I tweaked, added, removed, drew, researched, questioned, tested... I just wasn't the one coding it.<p>So now, instead of occupying my brain, it now lives on the internet for others to enjoy.<p>Yes, there’s something noble about making something entirely on your own, but what good is an idea that just sits in my head?<p>So here I am. I made the thing. The weird, little, quiet koi pond.<p>The silly project of passion. The little corner of the internet to let strangers watch fish quietly, together.<p>I hope this pond helps you as much as it helped me.
Show HN: Whiteboard (YC W26) – An open-source IDE for thoughtful software design
Hello! We’re Sid, Alex, Ketan, and Milan. We’re building Whiteboard (<a href="https://whiteboard.dev.fast/">https://whiteboard.dev.fast/</a>), an open-source desktop app where humans and agents can architect software together in a common workspace. Here’s our repo: <a href="https://github.com/devdotfast/whiteboard" rel="nofollow">https://github.com/devdotfast/whiteboard</a>.<p>We were missing the feeling of a “whiteboard session” with another dev where you leave with a deep understanding of a system, so we built this app for ourselves. Whiteboard plugs into the tools you already use - e.g. Claude Code, Codex, etc. – and gives your agent an SDK to draw on an in-app canvas to describe its work. We began with an MVP based on HTML artifacts and started rethinking the app as we ran into limitations:<p>1. Built on top of CodeOSS: We found that in pure HTML tools it was hard to connect a spec or diagram to code. In Whiteboard, when you click on visualizations like a sequence diagram, an entity relationship diagram, or a quote from the agent’s trace, you can jump to the underlying code directly. When navigating code, you get keybindings and LSP support from VSCode out of the box. We’ve found this is especially valuable because tradeoffs are often only discovered after a first pass at implementation (re: slop)<p>2. Semantic diff viewer: we wrote a semantic, AST-aware diff viewer in Rust so you can only view the code changes which are relevant to you [1]. We’ve set up some sane defaults: large added functions are summarized as pseudocode, and things like unit tests and large documentation changes are collapsed / hidden. This is all customizable with a WASM-based plugin system.<p>3. Decision Log: We found it difficult to reason about what set of decisions our agents made autonomously. So we built tools for agents to query and link their own traces to the Whiteboard, so you can understand how the requirements that you set were implemented, and understand what decisions your agent made autonomously.<p>Here’s a quick demo video explaining more: <a href="https://www.youtube.com/watch?v=ChPn3ftULWE" rel="nofollow">https://www.youtube.com/watch?v=ChPn3ftULWE</a><p>Folks at companies like Salesforce and Modal are using Whiteboard today as a review tool for architecture or spec-level changes – really any change where they want to be involved:<p>1. Reviewing your own coding agent’s work: because Whiteboard makes it easier to review large amounts of code, folks will typically have their AI agents create a prototype and a corresponding Whiteboard session so they can iterate on the design.<p>2. Reviewing other people’s changes: We’ve found that Whiteboard is particularly helpful when composed with tools like Greptile. For example, you can run an automated code reviewer on small changes and escalate to a Whiteboard session for the changes that require human judgement.<p>Why we built this: we’re four buddies from college who quit our jobs as tech leads right before agentic coding became industry standard. As we iterated towards an MVP for a previous idea, we struggled to maintain a comprehensible codebase while reaping all the velocity benefits of agentic coding. As more PRs were merged without our understanding, we felt a ‘cognitive debt’ begin to seep in, until it became difficult for us to even contribute to the system [2].<p>We’re releasing our desktop app under an MIT license. Please poke through and feel free to contribute! Eventually we’ll charge companies for a hosted web version that manages whiteboard session creation alongside features like trajectory storage and multiplayer reviews. Everything will always remain self-hostable.<p>Thanks for reading, and we hope you try it out! We would love to hear any feedback and to learn from your expertise.<p>Here’s are the project links again: <a href="https://github.com/devdotfast/whiteboard" rel="nofollow">https://github.com/devdotfast/whiteboard</a>, and you can install (for MacOS + Linux) at <a href="https://install.dev.fast">https://install.dev.fast</a><p>[1] diffs library: <a href="https://github.com/devdotfast/diffr" rel="nofollow">https://github.com/devdotfast/diffr</a>
[2] Credit for the term ‘cognitive debt’ goes to <a href="https://www.geoffreylitt.com/2026/07/02/understanding-is-the-new-bottleneck" rel="nofollow">https://www.geoffreylitt.com/2026/07/02/understanding-is-the...</a>
Show HN: Whiteboard (YC W26) – An open-source IDE for thoughtful software design
Hello! We’re Sid, Alex, Ketan, and Milan. We’re building Whiteboard (<a href="https://whiteboard.dev.fast/">https://whiteboard.dev.fast/</a>), an open-source desktop app where humans and agents can architect software together in a common workspace. Here’s our repo: <a href="https://github.com/devdotfast/whiteboard" rel="nofollow">https://github.com/devdotfast/whiteboard</a>.<p>We were missing the feeling of a “whiteboard session” with another dev where you leave with a deep understanding of a system, so we built this app for ourselves. Whiteboard plugs into the tools you already use - e.g. Claude Code, Codex, etc. – and gives your agent an SDK to draw on an in-app canvas to describe its work. We began with an MVP based on HTML artifacts and started rethinking the app as we ran into limitations:<p>1. Built on top of CodeOSS: We found that in pure HTML tools it was hard to connect a spec or diagram to code. In Whiteboard, when you click on visualizations like a sequence diagram, an entity relationship diagram, or a quote from the agent’s trace, you can jump to the underlying code directly. When navigating code, you get keybindings and LSP support from VSCode out of the box. We’ve found this is especially valuable because tradeoffs are often only discovered after a first pass at implementation (re: slop)<p>2. Semantic diff viewer: we wrote a semantic, AST-aware diff viewer in Rust so you can only view the code changes which are relevant to you [1]. We’ve set up some sane defaults: large added functions are summarized as pseudocode, and things like unit tests and large documentation changes are collapsed / hidden. This is all customizable with a WASM-based plugin system.<p>3. Decision Log: We found it difficult to reason about what set of decisions our agents made autonomously. So we built tools for agents to query and link their own traces to the Whiteboard, so you can understand how the requirements that you set were implemented, and understand what decisions your agent made autonomously.<p>Here’s a quick demo video explaining more: <a href="https://www.youtube.com/watch?v=ChPn3ftULWE" rel="nofollow">https://www.youtube.com/watch?v=ChPn3ftULWE</a><p>Folks at companies like Salesforce and Modal are using Whiteboard today as a review tool for architecture or spec-level changes – really any change where they want to be involved:<p>1. Reviewing your own coding agent’s work: because Whiteboard makes it easier to review large amounts of code, folks will typically have their AI agents create a prototype and a corresponding Whiteboard session so they can iterate on the design.<p>2. Reviewing other people’s changes: We’ve found that Whiteboard is particularly helpful when composed with tools like Greptile. For example, you can run an automated code reviewer on small changes and escalate to a Whiteboard session for the changes that require human judgement.<p>Why we built this: we’re four buddies from college who quit our jobs as tech leads right before agentic coding became industry standard. As we iterated towards an MVP for a previous idea, we struggled to maintain a comprehensible codebase while reaping all the velocity benefits of agentic coding. As more PRs were merged without our understanding, we felt a ‘cognitive debt’ begin to seep in, until it became difficult for us to even contribute to the system [2].<p>We’re releasing our desktop app under an MIT license. Please poke through and feel free to contribute! Eventually we’ll charge companies for a hosted web version that manages whiteboard session creation alongside features like trajectory storage and multiplayer reviews. Everything will always remain self-hostable.<p>Thanks for reading, and we hope you try it out! We would love to hear any feedback and to learn from your expertise.<p>Here’s are the project links again: <a href="https://github.com/devdotfast/whiteboard" rel="nofollow">https://github.com/devdotfast/whiteboard</a>, and you can install (for MacOS + Linux) at <a href="https://install.dev.fast">https://install.dev.fast</a><p>[1] diffs library: <a href="https://github.com/devdotfast/diffr" rel="nofollow">https://github.com/devdotfast/diffr</a>
[2] Credit for the term ‘cognitive debt’ goes to <a href="https://www.geoffreylitt.com/2026/07/02/understanding-is-the-new-bottleneck" rel="nofollow">https://www.geoffreylitt.com/2026/07/02/understanding-is-the...</a>
Show HN: Make cursed fonts like Times New Bastard
A joke tool that abuses OpenType's ligature feature to mix fonts. It works pretty fast on client-side by loading Python in WASM.
Show HN: Make cursed fonts like Times New Bastard
A joke tool that abuses OpenType's ligature feature to mix fonts. It works pretty fast on client-side by loading Python in WASM.
Show HN: I built a post-mortem debugger for native Windows x64/x86 crashes
Hello HN!<p>I've spent years debugging Windows crashes with tools that were either friendly but limited (e.g. Visual Studio) or powerful but archaic (e.g. WinDbg). I developed patterns and methods for understanding what was going on, and decided to build it into a much more effective debugging tool called ForensicDbg.<p>I built a modern interface to minimize the friction when debugging. All of the data shown to you is analyzed, interpreted, and presented to you clearly, so you can focus on what matters. Everything is interlinked so you can quickly and intuitivly navigate through the process space.<p>ForensicDbg comes with an MCP server which allows for agenic debugging. The work done to interpret and interlink your data also benefits AI tools. It removes the risk of hallucinations while building a stable foundation for them to work from without spending tokens.<p>If you want to try it out you can sign up and get a free beta license here: <a href="https://www.forensicdbg.com/beta" rel="nofollow">https://www.forensicdbg.com/beta</a>
Show HN: RxFilm Studio–Create and edit your product videos with AI agent
Hi HN,<p>I built RxFilm Studio, a video workspace that lets you create and revise videos with AI agent.<p>The reason I started this project is simple: I’ve noticed that many independent developers and small teams want to create marketing videos for their product, but producing these videos requires a lot of time and effort — from editing and visual effects to voiceovers and subtitles.<p>So I built Rxfilm Studio to simplify the entire video creation process. Start with an idea, a product website, images, or existing footage, and then generate a complete video with:
- Story and structure
- Editing and timeline
- Visual and sound effects
- Voiceovers, background music
- Subtitles and translation<p>Github: <a href="https://github.com/rxtech-lab/film-workflow" rel="nofollow">https://github.com/rxtech-lab/film-workflow</a><p>Here's a demo marketing video created using RxFilm Studio:
<a href="https://youtu.be/9_M15fRdZQE" rel="nofollow">https://youtu.be/9_M15fRdZQE</a><p>Welcome to try it out and I would love to hear your feedback!
Show HN: Ive Sent It – online courier for files, with signed proof of delivery
Show HN: An atlas of system designs with interactive architecture diagrams