Show HN Daily Selection (2025-08-30)
- Sosumi.ai – Convert Apple Developer docs to AI-readable Markdown
- Find Hidden Gems on HN
- Kanto.ai – The soc2 ready infra agent
- Alphie – Schedule and manage meetings directly in Slack
- A minimal TS library that generates prompt injection attacks
- ElectroBench
- An open source implementation of OpenStreetMap in Electron
- FFmpeg Pages – because I was tired of fighting FFmpeg
- OAuth for AI Agents
- BrowserTotal – Free, real-time AI scanner for browser extensions
- Octarine – a fast, lightweight, opinionated Markdown notes app
- Readn – Feed reader with Hacker News support
- Monchromate v1.5.0 – Smart greyscale browser extension
- Docustore – Vectorized Technical Documentations
- Create Private or Public Tool-Sharing Clubs with Patio
- WASM Quest, an open source game by Tortured Metaphor
- VR.dev – a developer network for VR/XR/AR devs
- PasteVault – open-source, E2EE pastebin with a pretty editor
- P2Party – Encrypted WebRTC Room URLs
- I made an app for gamers to stop procrastinate
- Dyson Sphere simulation (C++/OpenGL)
- PyTorch K-Means GPU-friendly, single-file, hierarchical and resampling
- HTMS (write JavaScript using HTML)
- StripeMeter – Open-Source Usage Metering for Stripe Billing
- DripCopy – Gentle Optical Media Copier for Underpowered USB Hosts
Sosumi.ai – Convert Apple Developer docs to AI-readable Markdown [Developer Tools]
91 points, 58 comments
A tool that converts Apple Developer docs into AI-readable Markdown by replacing the domain in the URL.
- Converts JavaScript-rendered Apple docs into clean Markdown for AI tools
- Simply replace
developer.apple.comwithsosumi.aiin any Apple docs URL - Uses structured data from Apple's docs to render accurate content
- Includes a search tool for the Apple developer website
- Built as a lightweight Hono app running on Cloudflare Workers
Discussion Link, Original Link
Find Hidden Gems on HN [Productivity]
90 points, 18 comments
A web app that surfaces overlooked Hacker News posts to help users discover hidden content.
- Identifies interesting but less popular HN posts
- Built using the Hacker News API without requiring an API key
- Open-source project available on GitHub
- Inspired by experimenting with Claude Code and OpenAI
- Simple, single-page design for easy use
Discussion Link, Original Link
Kanto.ai – The soc2 ready infra agent [Developer Tools]
5 points, 3 comments
Kanto.ai is a GitHub bot that automates SOC-2 compliant GCP infrastructure setup and maintenance using Terraform and GCP's Cloud Foundation Toolkit.
- Automates enterprise-grade, multi-repo GitOps deployments in GCP
- Watches GitHub issues and generates Terraform PRs with best practices
- Uses GCP Cloud Foundation Toolkit for projects, networking, IAM, and org policies
- Keeps infrastructure SOC-2 ready out of the box
- Early beta stage with a working prototype
Discussion Link, Original Link
Alphie – Schedule and manage meetings directly in Slack [Productivity]
3 points, 0 comments
Alphie – Schedule and manage meetings directly in Slack
- Schedule meetings within Slack
- Manage meeting details and participants
- Seamless integration with Slack workflows
Discussion Link, Original Link
A minimal TS library that generates prompt injection attacks [Developer Tools]
28 points, 8 comments
A minimal TypeScript library for generating prompt injection attacks based on the latest research.
- Open source with MIT license
- Super lightweight and easy to use
- Designed for responsible penetration testing with permission
Discussion Link, Original Link
ElectroBench [Developer Tools]
3 points, 0 comments
ElectroBench is a long-maintained benchmarking tool for performance evaluation.
- Provides performance benchmarking capabilities
- Allows users to compare and share their scores
- Maintained and updated over several years
Discussion Link, Original Link
An open source implementation of OpenStreetMap in Electron [Developer Tools]
3 points, 0 comments
Open-source implementation of OpenStreetMap built using Electron.
- Built with Electron for cross-platform compatibility
- Open-source and community-driven
- Provides a desktop version of OpenStreetMap
Discussion Link, Original Link
FFmpeg Pages – because I was tired of fighting FFmpeg [Video]
59 points, 29 comments
FFmpeg Pages is a straightforward collection of pre-tested FFmpeg commands to simplify video editing tasks.
- Provides ready-to-use FFmpeg commands for common tasks
- Eliminates the need to search through multiple sources
- Focuses on practical, working solutions without unnecessary complexity
Discussion Link, Original Link
OAuth for AI Agents [Developer Tools]
6 points, 0 comments
OAuth for AI Agents enables secure authentication for AI agents.
- Provides OAuth integration for AI agents
- Ensures secure authentication and authorization
- Facilitates seamless interaction between AI agents and services
Discussion Link, Original Link
BrowserTotal – Free, real-time AI scanner for browser extensions [Developer Tools]
4 points, 0 comments
Free AI-powered scanner for analyzing browser extensions and npm packages in real time.
- Live sandbox analysis of browser extensions (Chrome/Edge/Firefox) for permissions, network calls, and UI injections
- Static and dynamic scanning of npm packages for scripts, obfuscation, and security risks
- AI-generated plain-English risk summaries and shareable reports
Discussion Link, Original Link
Octarine – a fast, lightweight, opinionated Markdown notes app [Productivity]
25 points, 11 comments
A fast, lightweight, opinionated Markdown notes app with built-in Git sync and AI integration.
- Lightweight (<30MB, no Electron bloat)
- Plain Markdown files (no proprietary formats)
- Command bar for quick navigation and actions
- WYSIWYG editor without live preview jumping
- Built-in Git sync (GitHub/GitLab support)
- Natural language date parsing
- Multiple workspaces, templates, tags, and graph view
- BYOK AI integration (OpenAI, Anthropic, Gemini, etc.)
- On-device RAG for chatting with notes
- Focus mode and writing assistant
- One-time Pro license (no subscription)
- iOS app in development
Discussion Link, Original Link
Readn – Feed reader with Hacker News support [Productivity]
4 points, 1 comments
A feed reader that supports Hacker News and Lobste.rs discussions, forked from Yarr.
- Fetches and displays discussion threads from Hacker News and Lobste.rs
- Conveniently follows articles and related conversations
- Fork of the Yarr project, which is considered feature-complete
Discussion Link, Original Link
Monchromate v1.5.0 – Smart greyscale browser extension [Productivity]
3 points, 0 comments
Monochromate v1.5.0 is a smart greyscale browser extension with improved features and cross-platform support.
- Works on Firefox Android
- Includes shortcut keys for quick toggling
- Temporary disable feature with auto-re-enable
- Excludes media-only pages (e.g., images in new tabs)
- Over 450 users with 5-star ratings on Chrome Web Store and Firefox Add-ons
Discussion Link, Original Link
Docustore – Vectorized Technical Documentations [Developer Tools]
7 points, 0 comments
Docustore provides vectorized, up-to-date technical documentation for LLMs through a curated, plug-and-play pipeline.
- Scrapes, cleans, and vectorizes documentation from frameworks/SDKs
- Offers off-the-shelf context for LLMs
- Plans to host with an API/MCP for development-environment agnostic use
Discussion Link, Original Link
Create Private or Public Tool-Sharing Clubs with Patio [Consumer Tech]
4 points, 1 comments
Patio is a platform for DIY and home improvement communities to share tools and materials through private or public clubs.
- Share tools and leftover materials to reduce waste
- Create private groups (family, friends) or public ones (e.g., neighborhood tool libraries)
- Pin club locations for easy coordination
- Exchange guides, plans, and helpful links within clubs
Discussion Link, Original Link
WASM Quest, an open source game by Tortured Metaphor [Entertainment]
3 points, 0 comments
WASM Quest is an open-source game built using WebAssembly.
- Open-source game
- Built with WebAssembly technology
Discussion Link, Original Link
VR.dev – a developer network for VR/XR/AR devs [Developer Tools]
6 points, 0 comments
A lightweight developer network for VR/XR/AR developers to showcase demos, promote themselves, and find collaborators.
- Profiles with custom URLs (vr.dev/[username])
- Supports showcasing .glTF files
- Includes resume/experience with industry-specific signals
- Planned features: more showcase options, advanced search, GitHub integration, and better discovery
Discussion Link, Original Link
PasteVault – open-source, E2EE pastebin with a pretty editor [Text]
4 points, 0 comments
Open-source, end-to-end encrypted pastebin with a visually appealing editor.
- Open-source
- End-to-end encrypted
- Visually appealing editor
Discussion Link, Original Link
P2Party – Encrypted WebRTC Room URLs [Developer Tools]
6 points, 1 comments
P2Party is a TypeScript/C/WASM library for creating encrypted peer-to-peer mesh networks using shared URLs.
- Enables encrypted peer-to-peer communication with just a shared URL
- Uses WebRTC for direct browser-to-browser connections
- Implements custom cryptography with ChaChaPoly1305 and ephemeral keys
- Splits messages into isomorphic 64kb chunks with noise padding for obfuscation
- Supports file sharing with Merkle proofs for integrity
- Open-source under AGPL-3.0 license
- Works in browsers with IndexedDB storage
- Not yet security-audited, so not recommended for highly sensitive data
Discussion Link, Original Link
I made an app for gamers to stop procrastinate [Productivity]
3 points, 1 comments
An app designed to help gamers overcome procrastination.
- Targets gamers specifically
- Focuses on reducing procrastination
- No additional details provided in the post
Discussion Link, Original Link
Dyson Sphere simulation (C++/OpenGL) [Consumer Tech]
4 points, 2 comments
A C++/OpenGL simulation of a Dyson Sphere with adjustable satellite parameters.
- Renders ~20,000 satellites orbiting a star
- Adjustable satellite size, density, and distribution
- Built to explore graphics programming and visualize megastructures
- Open-source code available on GitHub
Discussion Link, Original Link
PyTorch K-Means GPU-friendly, single-file, hierarchical and resampling [Developer Tools]
8 points, 0 comments
A lightweight, GPU-friendly K-Means implementation in PyTorch with hierarchical clustering and memory-efficient processing.
- Chunked Computations: Processes large datasets efficiently by moving only necessary data chunks to GPU.
- Cluster Splitting: Refines clusters by splitting them into sub-clusters.
- Zero Dependencies: Single-file, PyTorch-only implementation for easy integration.
- Advanced Clustering: Supports hierarchical K-Means with resampling and flexible distance metrics (L2/cosine).
- Device Flexibility: Explicit control over data placement and computation (CPU/GPU).
- Future Plans: Memory-mapped file support and multi-node K-Means via PyTorch distributed.
HTMS (write JavaScript using HTML) [Developer Tools]
3 points, 1 comments
HTMS is a JavaScript compiler that allows writing JavaScript using HTML syntax, inspired by ColdFusion.
- Compiles HTML-like syntax into JavaScript
- Experimental and unconventional approach
- Includes working demos
- Inspired by early web development experiences
Discussion Link, Original Link
StripeMeter – Open-Source Usage Metering for Stripe Billing [Finance]
3 points, 2 comments
Open-source usage metering platform for Stripe Billing providing real-time tracking and cost projections.
- Transparency: Shows customers exact billing amounts with 0.5% parity.
- Exactly-once guarantee: Prevents double billing.
- Fast & scalable: Sub-minute updates using Redis + Postgres counters.
Discussion Link, Original Link
DripCopy – Gentle Optical Media Copier for Underpowered USB Hosts [Developer Tools]
3 points, 0 comments
DripCopy is a rate-limited optical media copier designed for low-power USB hosts to prevent drive failures by copying one file per second.
- Resilient copying for CD/DVD data on unstable USB hosts
- Rate-limited to one file per second to prevent high RPM and brown-outs
- Ideal for low-power devices like Raspberry Pi