The Daily Index — Friday, September 18, 2026

Repositories, courses and useful tools

Resources & Tools

TLDR · GitHub repository

BEND

Bend is a language for communicating intent to AI.

github.com

TLDR AI · GitHub repository

GIT AS SHARED MEMORY FOR AI RESEARCH AGENTS

Agora lets autonomous research agents share findings through an append-only Git DAG, where hypotheses, results, verifications, and reports become reproducible commits.

github.com

TLDR Dev · Tool

MUTINEER: MUTATION TESTING FOR RUBY

Mutineer performs mutation testing for Ruby with Prism and the standard library, changing code one mutant at a time and running only tests that reach the affected line. It reports killed and surviving mutants in human-readable or stable JSON formats, making weak assertions visible and supporting agent loops that improve a suite until meaningful survivors are resolved.

davidteren.github.io

TLDR Dev · GitHub repository

NEAT-ANNOTATIONS

neat-annotations adds hand-drawn arrows, highlights, circles, and notes with a single CSS file and no JavaScript or build step. Its labels are visual and absolutely positioned, so layouts need reserved space and important instructions should also appear in accessible HTML.

github.com

TLDR Dev · GitHub repository

CLOUDFLARE SECURITY AUDIT SKILL

Cloudflare's security audit skill organizes repository reviews into reconnaissance, coverage-led hunting, adversarial validation, structured findings, independent verification, and final reporting. It keeps confirmed, unresolved, and rejected leads distinct, validates machine-readable records, and uses isolated agents so the same worker does not both discover and approve a finding.

github.com

TLDR Dev · Tool

FRONT-END CHECKLIST

Front-End Checklist offers more than 350 rules across 11 web quality categories, curated review paths, and an MCP endpoint that lets AI tools use the same standards.

frontendchecklist.io

TLDR InfoSec · GitHub repository

LOGTOTAL-SANITIZER

logtotal-sanitizer is a framework-agnostic log sanitizer for browsers and Node.js that is designed to sanitize log files before they are sent to third-party platforms for processing, analysis, or troubleshooting.

github.com

TLDR InfoSec · GitHub repository

NEEDRE

neEDRe is a toy EDR project that demonstrates how to implement an EDR system using AYA, the Rust eBPF library.

github.com

TLDR Design · Tool

UI BLOCKS YOU CAN TUNE

A library of interactive UI blocks you can explore, tweak, and take straight into your projects.

bencho.dev

TLDR Design · Tool

CURATED COLORS IN CONTEXT

Happy Hues is a color palette inspiration site that acts as a real-world example of how the colors could be used in your design projects.

happyhues.co

TLDR Design · Tool

KNOW YOUR SHORTCUTS

An interactive 3D keyboard for learning the keyboard shortcuts of the apps you use every day. Pick a tool, hover a shortcut, and watch the keys light up.

shrtcts.click

TLDR Founders · Tool

MERCURY BOOKS

Mercury Books brings AI-powered accounting to Mercury. It can generate P&L, cash flow, and balance sheet reports using Mercury data and data from external financial platforms. The product was co-designed alongside accountants from leading firms. Existing Mercury customers can get started with Books in minutes.

mercury.com

TLDR DevOps · GitHub repository

BROWSERSKILL

BrowserSkill connects AI agents such as Cursor, Claude Code, and Codex to a user's logged-in browser. The tool requires agents to explicitly borrow open tabs and return them after finishing a task. It includes a command-line interface, a daemon, and a browser extension.

github.com

TLDR DevOps · GitHub repository

CLINE

Cline is an open-source coding agent that runs in IDEs, terminals, and as a native desktop app for macOS and Windows. It reads project structures, edits files, and executes terminal commands with human-in-the-loop approval. Users can switch between Plan and Act modes or use the SDK to build custom tools and coordinate multi-agent teams. The tool runs on any model and supports integrations through plugins or MCP servers.

github.com