1. Show HN: DumpSort – drop screenshots/PDFs, get a named zip (browser-only) (dumpsort.vercel.app)
Drop screenshots and PDFs. Get a named zip back. Files never leave your browser.
2. Show HN: Astronomy Buddy–what's worth pointing a telescope at tonight (astronomy-buddy.com)
Your personal guide to tonight
4. What Is Reasoning (lucumr.pocoo.org)
A short summary of how reasoning traces work.
5. Show HN: Halmos.Science - Hacker News for math, the server checks the proofs (halmos.science)
A community for mathematics where claims carry machine-checked status. Post a proof in Lean and the kernel rules on it.
6. Show HN: Outbid.to, a pay-to-win leaderboard for websites (www.outbid.to)
The internet’s most competitive leaderboard. Pay once. Rank instantly.
7. Show HN: Building Table Canon, an AI Campaign Memory Engine for TTRPGs (tablecanon.app)
Your table, remembered. Table Canon turns session audio into durable campaign memory — recaps, world dossiers, and Ask across your tabletop RPG.
8. Show HN: Excuse My French – a French-learning exercise generator (excusemyfrench.org)
Apprenez le français, librement. Des exercices de grammaire à volonté, dans votre navigateur.
10. Show HN: ISLP textbook rebuilt from PDF into ePub, using Claude Code (github.com)
Rebuilds the ISLP statistics textbook from its PDF into a reflowable EPUB 3 for a 7-inch e-reader. Text-first mathematics, real HTML tables, 3,686 resolved cross-references. - govarthenan/islp-epub
11. Show HN: Spec4j makes your REST APIs YAMLless (github.com)
Compile TypeSpec API contracts to a Spring Boot interface/DTO jar and publish it to a Maven registry
12. Show HN: Ullis – Local Ternary Moe-Kan Training and Inference Engine in Rust (github.com)
Ullis Engine — reasoning ternary KAN in Rust. Contribute to Vladislav-Kalinkin/ullis development by creating an account on GitHub.
13. Show HN: Open-source tool turning company knowledge into Duolingo-like courses (www.scibly.com)
Verwandle Richtlinien, Playbooks und Fachwissen in kurze, interaktive Kurse, mit Quellenbelegen und direkter Bereitstellung in Slack oder Teams.
14. Show HN: Testmagic.link – Zero-setup magic link testing for coding agents (testmagic.link)
Tell your coding agent to test magic-link sign-in with testmagic.link — no account, no token. Disposable inboxes with the magic link extracted.
16. Show HN: Free OSS Software Factory Template (github.com)
Meet Foreman, an eve Software Factory. Contribute to vercel-labs/eve-software-factory-template development by creating an account on GitHub.
17. Show HN: FillBook – A trade journal for Kalshi with fee-adjusted P&L (fillbook.io)
Auto-import your Kalshi fills and see what actually makes you money.
20. Rivian OS 2 (xcancel.com)
21. YACS 2.0 – Yet Another Curta Simulator (satadorus.eu)
22. Show HN: Let your coding agents set up your test coverage (blog.codacy.com)
The new Setup Coverage Skill detects your test setup, generates coverage in a format Codacy accepts, and adds the upload to your pipeline, across eleven language families and seven CI systems.
23. Show HN: Molecule.dev is an AI-first composable package ecosystem (github.com)
Monorepo containing every Molecule.dev package. Contribute to molecule-dev/molecule development by creating an account on GitHub.
24. Show HN: PingChange – monitor web pages and OpenAPI specs for meaningful changes (pingchange.com)
Monitor any webpage or OpenAPI spec for real changes. PingChange sends Slack, email, and webhook alerts with a readable diff. Start free, no credit card.
25. Show HN: Verified business dashboards inside ChatGPT and Claude via MCP Apps (www.corpusiq.io)
MCP Apps is the first official MCP extension. Tools can now return interactive dashboards, forms, and visualizations that render inside Claude and ChatGPT
26. Show HN: iOS Puzzle Game for Chinese Learners (apps.apple.com)
Download ZIHE: Chinese Character Game van Kim Koomen in de App Store. Bekijk schermafbeeldingen, beoordelingen en recensies, gebruikerstips en meer apps zoals…
29. Show HN: Language Audio Trainer – Learn languages without looking at the screen (playling.netlify.app)
Listen like a player, learn with flashcards. Phrases from life.
30. Show HN: Skilldocs – Figma for Markdown (skilldocs.dev)
A delightful collaboration layer for skills. Live cursors, inline comments, and an editor that renders as you type — with an MCP server so agents work the same loop.