Show HN Daily Selection (2025-07-01)
- TokenDagger – A tokenizer faster than OpenAI's Tiktoken
- New Ensō – first public beta
- We're two coffee nerds who built an AI app to track beans and recipes
- A continuation of IRS Direct File that can be self-hosted
- C.O.R.E – Opensource, user owned, shareable memory for Claude, Cursor
- Private real-time dictation app for Mac
- Audiopipe – Pipeline for audio diarization, denoising and transcription
- Attach Gateway – one-command OIDC/DID auth for local LLMs
- QuizKnit, an open source quiz creator
- MailMap – Turn emails into interactive stories on Google Maps
- Semantic-dictionary – A Python dictionary with semantic lookup
- DotnetEbpf - Write Linux eBPF kernel applications in C#
- Ravana, Multi AI Assistant Browser Desktop App
- My Cross-Platform MySQL Parser
- AI image alt text generation tool – Turn images into text with AI
- Sysadmin.ca Free Tools and Real-World Resources for Everyday Sysadmins
- Cheesy Mamas: Local only code editor with Git and Bash support
TokenDagger – A tokenizer faster than OpenAI's Tiktoken [Developer Tools]
239 points, 66 comments
TokenDagger is a high-performance, drop-in replacement for OpenAI's Tiktoken tokenizer, written in C++ 17 with Python bindings, offering significant speed improvements.
- Written in C++ 17 with thin Python bindings for compatibility
- Maintains exact BPE vocab and special-token rules as Tiktoken
- 4x faster single-threaded tokenization
- 2-3x higher throughput on large text files (1GB tested)
- Uses a faster jit-compiled regex engine and simplified algorithm for speed gains
- Includes benchmarking code for performance validation
Discussion Link, Original Link
New Ensō – first public beta [Productivity]
210 points, 80 comments
Ensō is a writing tool designed to help users achieve a flow state by separating writing from editing.
- Focuses on uninterrupted writing by disabling editing during sessions
- Built based on 6 years of experience and 2 million words of daily writing
- Simplified and more accessible design in its first public beta
- Encourages creative flow by minimizing self-editing distractions
Discussion Link, Original Link
We're two coffee nerds who built an AI app to track beans and recipes [Life Assistant]
34 points, 20 comments
An AI-powered iOS app for coffee enthusiasts to track beans, recipes, and brewing details with automated data extraction and organization.
- Auto-detects coffee bag details (roaster, origin, process, etc.) via photo snap
- Extracts structured recipes from YouTube links or photos
- Logs grind size, roast timeline, ratings, and notes in a clean UI
- Provides coffee year-in-review analytics for tracking habits and favorites
- Includes AI assistant for brew-related queries and bean facts
Discussion Link, Original Link
A continuation of IRS Direct File that can be self-hosted [Finance]
4 points, 0 comments
A self-hostable continuation of the IRS's open-sourced Direct File tax tool, updated for the next tax season.
- Based on the IRS's open-sourced Direct File project
- Self-hostable for independent use
- Updated to be ready for the next tax season
- Documentation available online for reference
Discussion Link, Original Link
C.O.R.E – Opensource, user owned, shareable memory for Claude, Cursor [Developer Tools]
3 points, 0 comments
C.O.R.E is an open-source, user-owned knowledge graph that enables multiple LLMs (like ChatGPT, Claude, and Cursor) to share and query persistent context.
- Portable context: Avoids vendor lock-in by allowing cross-tool memory sharing.
- Temporal + relational: Stores full version history of facts with timestamps and provenance.
- User-controlled: Choose between local (Docker) or hosted deployment, with control over private vs. synced memories.
- Traceable answers: Hover to see who/when/why a fact was added or modified.
- Free hosted tier available for testing.
Discussion Link, Original Link
Private real-time dictation app for Mac [Audio]
9 points, 2 comments
Private real-time dictation app for Mac.
- Real-time dictation
- Privacy-focused
- Mac-only application
Discussion Link, Original Link
Audiopipe – Pipeline for audio diarization, denoising and transcription [Audio]
4 points, 0 comments
Audiopipe is a streamlined tool for denoising, diarization, and transcription of audio using demucs, pyannote, and insanely-fast-whisper.
- Combines denoising, diarization, and transcription in a single command
- Designed for transcribing podcasts and Dungeons and Dragons sessions
- Includes a WASM-based UI for loading transcriptions and audio
- Open for contributions and feedback
Discussion Link, Original Link
Attach Gateway – one-command OIDC/DID auth for local LLMs [Developer Tools]
4 points, 0 comments
Attach Gateway is a one-command OIDC/DID authentication solution for local LLMs, simplifying auth setup for model servers like Ollama or vLLM.
- Verifies OIDC/DID JWTs
- Adds X-Attach-User and X-Attach-Session headers for shared identity
- Includes optional /a2a/tasks/send endpoint for A2A hand-offs
- Mirrors prompts and completions to Weaviate
- Runs in Docker with quick setup via
pip install attach-dev
Discussion Link, Original Link
QuizKnit, an open source quiz creator [Education]
3 points, 0 comments
QuizKnit is an open-source quiz creator that generates quizzes from text or historical categories.
- Creates quizzes by pasting text or selecting from historical categories
- Allows users to take, save, and share quizzes via URL
- Started as an OpenAI API experiment, now open-sourced
- Includes working demo at quizknit.com
- Frontend and backend code available on GitHub
Discussion Link, Original Link
MailMap – Turn emails into interactive stories on Google Maps [Productivity]
3 points, 0 comments
MailMap turns emails with geotagged photos into interactive map stories instantly.
- No app downloads or registrations required for basic use
- Automatically extracts GPS coordinates from image EXIF data
- Real-time processing and map updates
- Supports JPEG, PNG, and GIF formats
- Community moderation and story voting
- Mobile-responsive Google Maps integration
- Direct map editing for registered users
Discussion Link, Original Link
Semantic-dictionary – A Python dictionary with semantic lookup [Developer Tools]
4 points, 0 comments
A Python dictionary that uses semantic similarity for key lookup, enabling flexible matching of semantically related terms.
- Uses embedding models to calculate semantic similarity between keys
- Supports flexible lookup for synonyms or related terms
- Useful for AI applications handling varied or evolving key formats
- Available as a distributable Python package
Discussion Link, Original Link
DotnetEbpf - Write Linux eBPF kernel applications in C# [Developer Tools]
4 points, 0 comments
A .NET to C transpiler enabling Linux eBPF kernel applications to be written in C#.
- Transpiles C# code to C for embedded development
- Supports writing Linux eBPF kernel applications in C#
- Provides better syntax than C and unit testing capabilities
- Future goal: seamless integration between C# kernel and user-space eBPF applications
Discussion Link, Original Link
Ravana, Multi AI Assistant Browser Desktop App [Life Assistant]
3 points, 1 comments
Multi AI assistant browser desktop app.
- Supports multiple AI assistants
- Designed for browser and desktop use
- Combines functionality in a single app
Discussion Link, Original Link
My Cross-Platform MySQL Parser [Developer Tools]
4 points, 0 comments
A cross-platform MySQL parser extracted from TiDB, optimized for WASM compatibility and independent usage.
- Extracted from TiDB's parser to avoid dependency on TiDB's monolithic structure
- Fully compatible with MySQL syntax
- Designed for cross-platform use, including WASM support
- Includes an interactive demo for testing queries
- Independent Go package for easier integration
Discussion Link, Original Link
AI image alt text generation tool – Turn images into text with AI [Image]
4 points, 0 comments
AI-powered tool and WordPress plugin for automatic alt text generation from images.
- Generates alt text for images automatically using AI
- Available as an online tool and WordPress plugin
- Paid service with free credits for testing
- Designed by a freelance WordPress developer
Discussion Link, Original Link
Sysadmin.ca Free Tools and Real-World Resources for Everyday Sysadmins [Productivity]
4 points, 0 comments
A free, no-signup resource hub for sysadmins offering practical tools and templates.
- Built by an IT admin for IT admins
- Privacy-respecting with no fluff
- Includes cheat sheets, outage trackers, and vendor call prep templates
- Completely free with only one ad
- Focuses on real-world utility over theory
Discussion Link, Original Link
Cheesy Mamas: Local only code editor with Git and Bash support [Developer Tools]
4 points, 2 comments
A local-first, Git-integrated code editor for Linux with built-in Bash support and no telemetry.
- Local-first design with no telemetry, sync, or accounts
- Multi-tab editor with syntax highlighting for Python, C, and LaTeX
- Built-in execution for Python, C (via gcc), and LaTeX (via pdflatex)
- Embedded Git history sidebar with per-file commit tracking
- Visual diff and granular revert options for individual lines
- Dark UI with persistent tab state and no background processes
- Single-instance handling with file path relay for new tabs
- Optional default file handler for
.py
,.c
,.tex
, and.sh
files - Fully offline, installable via shell script with
.desktop
integration