Product Radar

Hacker News • Jun 1, 2026

Deliberate: A tool designed to log what an AI agent rejected, not just what it executed.

A solution to show what the agent was choosing between, addressing a critical gap in agent observability, particularly for teams running LangGraph or OpenAI Agents in production.

PocketOS incident DataTalks.Club incident API call prod volume

Hacker News • Jun 1, 2026

A CakeML-based self-verifying, self-improving system.

Not explicitly stated beyond the core technical concept.

CakeML self-verifying self-improving system

Hacker News • May 31, 2026

A terminal-based Markdown reader with a GUI-like experience, offering advanced features like navigation, search, and rich content rendering.

A terminal-based Markdown reader focused on a GUI-like experience, providing enhanced functionality for content consumption within command-line environments.

terminal-based Markdown reader GUI-like experience navigation

web-based RSS reader Kindle's experimental browser JS frameworks CORS proxy

Inkfeed, a web-based RSS reader for Kindle's experimental browser, enabling direct reading, article downloads, email forwarding, and Wikipedia browsing. It offers both a backend-supported persistent mode and a local-storage, CORS-proxy-dependent mode.

An integrated RSS Reader for Kindle, addressing the lack of native support and improving upon existing manual transfer methods. It aims to provide a seamless content consumption experience directly on the device.

gaming social platform matchmaking app skill level, play style and schedule Swipe to find players (Tinder-style)

Jynx, a gaming social platform and matchmaking app that connects players based on skill, play style, and schedule, featuring Tinder-style swiping, LFG sessions, chat, and squad building. Developed using 'agentic engineering' with Claude Code.

A matchmaking app to find compatible gaming teammates, solving the social friction points in online gaming. It leverages advanced AI development techniques for rapid feature delivery and robust architecture.

open-source native R2 hono worker

Open-source native screenshot capture, editor, video recorder, editor, and compressor. Cloud hosting with R2 + Hono worker.

open-source cleanshot alternative

Notational Velocity NvAlt nvUltra Swift

A Notational Velocity (NvAlt) reboot in Swift, an open-source Mac app for plain text notes with quick search, .md file storage, and iCloud sync (future iOS).

A Notational Velocity (NvAlt) Reboot in Swift. OSS

semantic search indexing speed embedding quality

Mira, a semantic file search tool.

Enables file search without requiring exact filenames, relying on semantic understanding.

static-allocation MLP inference ANSI C 2-slot ring buffer

A static-allocation approach for MLP inference in ANSI C using a 2-slot ring buffer.

Minimizes RAM usage for tiny MLP inference on microcontrollers, achieving near-practical lower bound for RAM usage without sacrificing speed or introducing runtime complexity.

AI Skill port PostgreSQL extensions MySQL Agent skills

An AI Skill designed to port PostgreSQL extensions to MySQL.

An 'AI Skill' for 'working with VillageSQL' that runs in various coding agents.

libfyaml YAML/JSON parse cache opt-in transparent parse cache stable YAML/JSON files

Libfyaml 1.0.0-alpha7, a library feature that adds an opt-in transparent parse cache for repeated reads of stable YAML/JSON files, achieving significant speed improvements (473x faster on hot cache) and reduced memory usage.

Improves performance for 'startup/config/data-loading workloads where the same large YAML or JSON file is read repeatedly' by adding a parse cache, specifically highlighting its speed (35.9 ms for 427 MB) and memory efficiency.

infrastructure global ids communicate coding agents

An open-source tool for bootstrapping a team of coding agents from a template, automating the assignment of roles, responsibilities, and setup (global IDs, communication, directories).

Solves the 'pain' of structuring coding agents' work by automating the bootstrapping process from templates, enabling agents to 'get things done' more effectively.

Hacker News • May 28, 2026

Epstein Index, a hypothetical index fund tracking stock returns of companies linked to Jeffrey Epstein.

An observation highlighting the significant outperformance (2,563% return) of companies linked to Jeffrey Epstein compared to the S&P (609% return) since 2008.

index fund stock returns S&P

Hacker News • May 28, 2026

An enhanced FreeCiv deployment with custom features.

An improved 'long-turn FreeCiv experience' that addresses client bugs and adds community-driven features like an in-game editor, intelligence dashboard, and an HTML-based online map viewer.

FreeCiv deployment GTK4 version QT variant HTML based

browser-based guitar amp/effects rig

Axion, a browser-based guitar amp/effects rig.

A guitar rig that runs entirely in the browser, initially built as a tool for album writing and production.

sends SMS messages LLM-summarized emails geolocation

An emergency page (web-based tool).

A personal emergency page for family, designed to send SMS messages (LLM-summarized) and emails with geolocation and IP address, for situations when a phone is unavailable.

web-based file manager self-hosted open-source file permissions

Filemat, an open-source web-based file manager.

A self-hosted, open-source web-based file manager with simple setup and file permissions that work across the entire filesystem, unlike app-managed folder permissions.

Caesar ciphers Enigma machine sandbox machine React

Enigma, an interactive web-based walkthrough.

A 13-stage, ~15-minute interactive walkthrough from Caesar ciphers to a working Enigma machine, designed to demystify the Enigma machine and its flaws for those who find it intimidating.

Hacker News • May 26, 2026

PlainBytes PDF Redactor, a tool for local-first PDF redaction.

A local-first solution for permanently removing data from PDFs.

Local-first PDF redaction permanently removing data