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Show HN: Kappal – CLI to Run Docker Compose YML on Kubernetes for Local Dev

https://github.com/sandys/kappal
21•sandGorgon•2d ago•11 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
271•isitcontent•21h ago•36 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
348•eljojo•1d ago•214 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
367•vecti•23h ago•167 comments

Show HN: I saw this cool navigation reveal, so I made a simple HTML+CSS version

https://github.com/Momciloo/fun-with-clip-path
2•momciloo•1h ago•0 comments

Show HN: Stacky – certain block game clone

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3•Keyframe•1h ago•0 comments

Show HN: A toy compiler I built in high school (runs in browser)

https://vire-lang.web.app
2•xeouz•1h ago•1 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
94•antves•2d ago•70 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
81•phreda4•21h ago•16 comments

Show HN: Nginx-defender – realtime abuse blocking for Nginx

https://github.com/Anipaleja/nginx-defender
3•anipaleja•3h ago•0 comments

Show HN: Slack CLI for Agents

https://github.com/stablyai/agent-slack
52•nwparker•1d ago•11 comments

Show HN: BioTradingArena – Benchmark for LLMs to predict biotech stock movements

https://www.biotradingarena.com/hn
28•dchu17•1d ago•12 comments

Show HN: Artifact Keeper – Open-Source Artifactory/Nexus Alternative in Rust

https://github.com/artifact-keeper
154•bsgeraci•1d ago•64 comments

Show HN: ARM64 Android Dev Kit

https://github.com/denuoweb/ARM64-ADK
18•denuoweb•2d ago•2 comments

Show HN: MCP App to play backgammon with your LLM

https://github.com/sam-mfb/backgammon-mcp
3•sam256•5h ago•1 comments

Show HN: Which chef knife steels are good? Data from 540 Reddit tread

https://new.knife.day/blog/reddit-steel-sentiment-analysis
2•p-s-v•2h ago•0 comments

Show HN: Gigacode – Use OpenCode's UI with Claude Code/Codex/Amp

https://github.com/rivet-dev/sandbox-agent/tree/main/gigacode
21•NathanFlurry•1d ago•10 comments

Show HN: I'm 75, building an OSS Virtual Protest Protocol for digital activism

https://github.com/voice-of-japan/Virtual-Protest-Protocol/blob/main/README.md
7•sakanakana00•6h ago•1 comments

Show HN: I built Divvy to split restaurant bills from a photo

https://divvyai.app/
3•pieterdy•6h ago•1 comments

Show HN: I Hacked My Family's Meal Planning with an App

https://mealjar.app
2•melvinzammit•8h ago•0 comments

Show HN: XAPIs.dev – Twitter API Alternative at 90% Lower Cost

https://xapis.dev
3•nmfccodes•3h ago•1 comments

Show HN: Micropolis/SimCity Clone in Emacs Lisp

https://github.com/vkazanov/elcity
173•vkazanov•2d ago•49 comments

Show HN: I built a free UCP checker – see if AI agents can find your store

https://ucphub.ai/ucp-store-check/
2•vladeta•9h ago•2 comments

Show HN: Daily-updated database of malicious browser extensions

https://github.com/toborrm9/malicious_extension_sentry
14•toborrm9•1d ago•8 comments

Show HN: Slop News – HN front page now, but it's all slop

https://dosaygo-studio.github.io/hn-front-page-2035/slop-news
19•keepamovin•11h ago•6 comments

Show HN: Falcon's Eye (isometric NetHack) running in the browser via WebAssembly

https://rahuljaguste.github.io/Nethack_Falcons_Eye/
6•rahuljaguste•20h ago•1 comments

Show HN: Horizons – OSS agent execution engine

https://github.com/synth-laboratories/Horizons
24•JoshPurtell•1d ago•5 comments

Show HN: Compile-Time Vibe Coding

https://github.com/Michael-JB/vibecode
10•michaelchicory•10h ago•3 comments

Show HN: Local task classifier and dispatcher on RTX 3080

https://github.com/resilientworkflowsentinel/resilient-workflow-sentinel
25•Shubham_Amb•1d ago•2 comments

Show HN: Fitspire – a simple 5-minute workout app for busy people (iOS)

https://apps.apple.com/us/app/fitspire-5-minute-workout/id6758784938
2•devavinoth12•14h ago•0 comments
Open in hackernews

Show HN: Elf – A CLI Helper for Advent of Code

https://github.com/cak/elf
3•cak•2mo ago
I built a CLI tool called elf to streamline Advent of Code workflows. It removes a lot of the repetitive steps around fetching inputs, submitting answers safely, and checking private leaderboards.

The tool focuses on: - Input fetching with caching (no repeated downloads, works offline) - Safe answer submissions with guardrails to prevent duplicate or invalid guesses - Private leaderboard viewer (table or JSON) - Status calendar and guess history viewer - Optional Python API for scripting or automation

It’s built with Typer, httpx, Pydantic, and Rich, and aims to be clean, predictable, and easy to extend.

Repo: https://github.com/cak/elf

PyPI: https://pypi.org/project/elf/

Feedback and questions are welcome.

Comments

cak•2mo ago
Happy to answer any questions about design choices, caching strategy, the guardrails for safe submissions, or anything else. If anyone uses AoC in a team or automation setup, I’m especially interested in what features would help.
youchen_•2mo ago
This looks like a really useful tool for Advent of Code! The caching feature and offline support are great additions. Having a clean CLI interface makes the workflow so much smoother. Thanks for sharing!
cak•2mo ago
Thanks! Caching around inputs and submissions was a priority to keep the workflow fast and predictable. Happy to hear any feedback if you try it out. Really appreciate it, and happy puzzle solving!
ardata•2mo ago
Does the guess cache sync across machines at all, or is it purely local? I jump between my laptop and desktop for AoC and it'd be annoying to resubmit a 'too low' answer I already tried elsewhere.
cak•2mo ago
Sorry for the delay, I missed this! Great question. The guess cache is local by default, but you can set ELF_CACHE_DIR to point it at a shared folder like iCloud, Dropbox, Google Drive, or anything that syncs across your machines. That will keep your guess history unified so you do not risk resubmitting a too low or too high answer. Happy puzzle solving!
computersuck•2mo ago
I really like the clear explanation of caching behavior in the README. More open source projects should do this and save people time from searching forums or code base for "where does it store X"
cak•2mo ago
Thank you, that means a lot! I tried to make the caching behavior as transparent as possible so folks don’t have to dig through the code to figure out where things live. Really glad it helped, and happy to take suggestions if anything could be clearer.