1. Show HN: Sfotty Pie – A browser-based Atari 8-bit emulator in TypeScript (a8.aygun.me)
A cycle-exact 6502 toolkit: run the Atari 8-bit in your browser, plus a 6502 core and assembler.
2. Show HN: Code Airlock: Run Claude Code and Codex in Disposable MicroVMs (github.com)
Run Claude Code (or another coding agent) unattended, inside a disposable microVM, with its work committed to git so you can review everything from your host. - Trivo25/code-airlock
3. Show HN: Tinyreplay – lightweight session replay without analytics/cloud (github.com)
privacy-first session replay. no analytics, no accounts, no cloud. - kzekiue/tinyreplay
4. Show HN: Akshara vision localfirst layout aware OCR and document restorer (bgraaj.github.io)
5. Show HN: A deterministic I Ching engine, cross-validated against another impl (github.com)
Deterministic I Ching (Liu Yao / 六爻) hexagram engine — cross-validated, Apache-2.0 - yaomancy/liuyao-engine
6. Show HN: Krbn, a pencil-style 3D renderer with SVG output (github.com)
A web engine for pencil-style rendering of 3D scenes to SVG — exact silhouettes, hidden-line ghosting, hatching. Great for abstract and technical scenes. - vpalos/Krbn
7. Show HN: @playbykey/theory - Music theory TypeScript engine and MCP server (theory-engine.docs.playbykey.com)
TypeScript-first music theory engine for scales, modal relationships, key signatures, and interval resolution. Zero dependencies, full type safety, MCP server support.