- alirezarezvani/claude-skills
claude-skills is an MIT-licensed library of about 398 Claude Code skills, agents, personas and plugins across 20 domains, including engineering, marketing, compliance and C-level advisory. Each skill is a SKILL.md with stdlib-only Python CLI tools and reference docs. Install scripts and convert.sh adapt it to Codex, Gemini CLI, Cursor, Aider, Windsurf and other coding agents, and it includes a skill-security-auditor scanner.
github.comrepoAdded 25 Oct 2026🧠 AI - alirezarezvani/claude-skills
claude-skills is an open-source MIT library of about 398 Claude Code skills, agents and plugins that also installs into Codex, Gemini CLI, Cursor and 9 other coding agents. The security-relevant parts are skill-security-auditor, a stdlib-only Python scanner that checks skills for command injection, data exfiltration, prompt injection and dependency supply-chain risks before install, plus a security-guidance PreToolUse hook, a security suite and compliance skills (ISO 27001, SOC 2, GDPR).
github.comrepoAdded 25 Oct 2026🛡️ Security
affaan-m/ECC | RepoDirECC (affaan-m/ECC) is an open-source performance optimization system for AI coding agents. It packages 261+ skills, 64+ agents and 84+ commands that tune Claude Code, Codex, Cursor and other agent harnesses for speed, memory and security. Practitioners can use it as a ready-made skills and harness configuration set. The RepoDir page gives only this short description, with no install steps or benchmarks.
repodir.comrepoAdded 24 Oct 2026🧠 AI- Sadra Majidi (@SadraMajidi04) on X
Impeccable is an open-source skill for AI coding agents that steers them away from generic UI output such as purple gradients and nested cards. It provides 24 commands (critique, audit, polish, typeset) and 61 detector rules that run without an LLM. It works with Claude Code, Cursor and Codex, and the repo is pbakaus/impeccable on GitHub. The source is a short tweet and gives no further detail.
x.comrepoAdded 23 Oct 2026, published 22 Oct 2026🧠 AI - DietrichGebert/ponytail
Ponytail is a single skill prompt (skills/ponytail/SKILL.md, with a compact AGENTS.md) that makes coding agents write only the code a task needs, reusing existing components while keeping validation, error handling, security and accessibility. The author benchmarked it in Claude Code with Opus 5.5 over 39 tasks, 5 runs each, including a real FastAPI + React repo. They report -53% code, -41% time, -26% cost and -45% tokens, and 98% of risky logic shipping with a test versus 68% without. It adds /ponytail-review and /ponytail-audit commands, a Claude Code cost/token band with a local board, and installs through Claude Code and Codex plugin marketplaces or as a rules file for Cursor, Copilot, Gemini, OpenCode and others.
github.comrepoAdded 17 Oct 2026🧠 AI - morluto/rea
REA (rea-agents on npm) registers an MCP server and matching workflow instructions with coding agents such as Claude Code, Codex, Cursor and Gemini CLI. It exposes tools for inspecting native binaries through Hopper, Ghidra or IDA (with optional objdump and Rizin), JavaScript/Electron apps and ASAR archives, .NET assemblies and websites. Results come back with evidence and limitations, so the agent can explain how a feature works and write and test its own implementation. Analysis runs locally, there is a CLI with the same workflows, and the showcases include C reconstructions verified against original x86 function bytes.
github.comrepoAdded 14 Oct 2026🧠 AI - argoproj-labs/mcp-for-argocd
TypeScript MCP server for Argo CD that lets MCP clients (Cursor, VS Code, Claude Desktop) list, inspect, create, update, delete and sync applications, read logs and events, and run resource actions through natural language. It supports stdio and HTTP stream transports, with a stateless mode for multi-replica Kubernetes deployments. The security design is detailed: API tokens are read only from env vars or headers and never from tool arguments, the default token is bound to the default base URL, a per-host token registry covers extra instances, a read-only mode disables write tools, and the HTTP listener binds loopback by default and requires an inbound auth token if exposed.
github.comrepoAdded 10 Oct 2026🧠 AI - mattpocock/skills — agent skills for engineers
mattpocock/skills is a collection of small, composable "agent skills" for software engineering that install into Claude Code, Codex, GitHub Copilot, Gemini CLI, Cursor, OpenCode, Devin, Windsurf, Amp and Pi via plugin managers or the `npx skills` CLI. It packages practices like interview-driven requirement gathering (/grill-me, /grill-with-docs), domain-model/glossary building, test-driven development with red-green-refactor (/tdd), bug diagnosis loops, codebase architecture improvement, ticket triage and spec-to-implementation workflows (/to-spec, /to-tickets, /implement, /implement-spec), splitting skills into user-invoked orchestrators and model-invoked reusable disciplines. It's built by Matt Pocock as an alternative to heavier process-owning frameworks like GSD, BMAD and Spec-Kit, aiming to keep engineers in control while giving coding agents better feedback loops and shared vocabulary.
github.comrepoAdded 8 Oct 2026🧠 AI - overmind-core/overmind
Overmind is an open-source platform (MIT SDK/CLI, AGPL-3.0 platform, self-hostable) that instruments an agent's code via OpenTelemetry tracing, turns the resulting production traces (or any dataset) into a fine-tuned model benchmarked against user-defined eval metrics, and serves it through one unified API with downloadable/retrainable weights. It ships an SDK, CLI, REST API, Console, and an MCP server exposing project tools and workflows (investigate-capability, finetune-capability, ship-model) for Cursor, Claude Code, OpenCode and Codex, and can sync traces from Langfuse, LangSmith, Braintrust or Galileo; self-hosting runs via Docker Compose with Postgres, Redis, Celery workers and Modal-based GPU workers for fine-tuning/serving (vLLM).
github.comrepoAdded 6 Oct 2026🧠 AI - OKX Agent Trade Kit (okx-trade-mcp / okx-trade-cli)
OKX Agent Trade Kit is an open-source MCP server (okx-trade-mcp) and CLI (okx-trade-cli) that let AI assistants like Claude Desktop, Cursor, Claude Code and VS Code place trades and query account data on the OKX exchange via natural-language commands. It runs locally with API keys never leaving the machine, supports module scoping (market, spot, swap, account, earn), a read-only mode for safe querying, multiple profiles, and includes pre-built skill files for agent frameworks plus structured JSON error reporting for debugging failed tool calls.
github.comrepoAdded 2 Oct 2026🧠 AI - https://github.com/Panniantong/Agent-Reach
Agent-Reach is a CLI and agent-"skill" layer that equips coding agents (Claude Code, Cursor, OpenClaw) with ready-made web-reading tool use: fetching arbitrary pages via Jina Reader, YouTube transcripts via yt-dlp, GitHub repos via gh CLI, Bilibili search, RSS via feedparser, and semantic web search via Exa through mcporter, with login-gated platforms (Twitter/X, Reddit, Xiaohongshu, Facebook, Instagram) added on request via cookies or OpenCLI browser sessions. Each platform module probes an ordered list of candidate backends and falls back automatically when one breaks (e.g. yt-dlp being blocked by Bilibili's anti-scraping), and an `agent-reach doctor` command reports which backend each channel is currently using. It positions itself as a "capability layer" that selects, installs and health-checks the right upstream tool for an agent rather than wrapping the reads itself.
github.comrepoAdded 2 Oct 2026, published 1 Oct 2026🧠 AI - rehan-remade/universal-modder
universal-modder is a set of Agent Skills, a CLI (um) and a shared knowledge base (field notes in knowledge/) that let AI coding agents such as Claude Code, Codex, Gemini CLI, Cursor, GitHub Copilot and OpenCode find a PC game's engine, reverse-engineer its code, build a working mod, generate art/3D/sound assets via the fal MCP server (or a local ComfyUI server), test the mod in the running game, and write a field note for the next agent. It ships worked examples — a weapon/boss pack for Terraria via tModLoader, a new civilization for Age of Empires II DE, and a real-time Minecraft-inside-GTA-V passthrough mod — each documented with a field note of exact versions, routes and gotchas, and agents can open pull requests to grow the shared knowledge base.
github.comrepoAdded 6 Oct 2026, published 30 Sep 2026🧠 AI - dagoSte/squadra
Squadra (version 3.11.0) is an MIT-licensed Python 3.12+ tool that coordinates several Claude Code, Codex and interactive Cursor windows on one project through a shared local registry. It records tasks, acknowledgements, source-bound proofs and independent reviews by a window that did not write the code. A local dashboard shows progress, per-window token usage and model-balance suggestions, and community plugins extend it. The page was truncated, so later sections are not covered.
github.comrepoAdded 27 Oct 2026, published 28 Sep 2026🧠 AI - SpecterOps/Blacklight — local AI agent attack surface mapping toolkit
Blacklight is a SpecterOps toolkit for endpoint forensics on AI coding agents, split into Scout (bounded metadata/filesystem triage across Codex, Claude Code, Cursor, Antigravity CLI, and Grok that finds candidate session artifacts without reading their contents) and Session Analysis (a Python CLI that parses selected JSONL/SQLite session downloads from Codex, Claude Code, Cursor, and Antigravity CLI into ranked, redacted local reports). It's built for investigators who need to identify and review AI agent session history on a host — surfacing config, auth metadata, and high-value indicators — while explicitly leaving secret scanning to external tooling; paths are informed by SpecterOps' Endpoint AI Agent Abuse (EAA) technique catalog.
github.comrepoAdded 27 Sep 2026🛡️ Security - graygnatconsole/mcp-audit-tool
mcp-audit-tool is a dependency-light Python CLI that statically scans Claude Desktop, Cursor, Windsurf, Cline, Zed, and VS Code MCP configuration files for security issues, including hardcoded secrets, unpinned/rug-pull packages, pipe-to-shell installers, tool-poisoning via hidden instructions in tool descriptions, filesystem servers rooted at '/', and unauthenticated plaintext HTTP MCP endpoints. It auto-discovers configs across macOS/Linux/Windows, produces a security score/grade plus SARIF 2.1.0 output for GitHub Code Scanning, and is built around the OWASP MCP Top 10 categories with a CI/CD example that fails builds on severity thresholds. The roadmap adds live server probing over stdio/SSE for runtime rug-pull detection and an ML-based prompt-injection classifier for tool descriptions.
github.comrepoPublished and added 26 Sep 2026🛡️ Security - yetone/magpie
magpie is a cross-platform menu bar app, TUI and CLI that lets you view and switch the model each installed AI coding agent (Claude Code, Codex, Gemini CLI, OpenCode, Cursor, Copilot CLI, Goose, Pi, etc.) is configured to use, editing each agent's config file surgically without disturbing comments or formatting. It runs a local gateway (127.0.0.1:3425) that translates between OpenAI Chat Completions, OpenAI Responses and Anthropic Messages APIs so every agent can point at one endpoint and use any provider's models, including routing groups that spread requests across multiple keys/subscriptions with configurable routing strategies (smart, order, rotate, usage). It can also reuse existing subscriptions (Claude Code, Codex/ChatGPT, Copilot, Devin, Gemini CLI) as providers for other agents without exposing or copying credentials, and supports encrypted profile backup/restore.
github.comrepoAdded 26 Sep 2026, published 23 Sep 2026🧠 AI - Show HN: Foremerge – Catch intent conflicts between parallel coding agents
Foremerge is an open-source coordination protocol layered above Git for parallel coding agents (Claude Code, Codex, Cursor). Agents publish semantic intent (scopes like symbol/api/schema) before editing into a shared SQLite store under .git, so Foremerge can detect intent conflicts—like one agent replacing a class another is extending—that Git's text-diff merging would silently miss. It's advisory-only (no file locking), deterministic (no LLM judgment calls), and gates ChangeSet acceptance on Foremerge-run validation rather than agent self-reports.
github.comrepoAdded 26 Sep 2026, published 21 Sep 2026🧠 AI - awarexone/Agentic-Bug-Hunter
Agentic-Bug-Hunter is an open-source CLI (bughunter) and Claude Code plugin that automates the bug bounty pipeline end-to-end: recon, vulnerability hunting across 26 web2 and 10 web3/smart-contract bug classes, a "7-Question Gate" validation step to kill weak findings, and submission-ready report generation for HackerOne, Bugcrowd, Intigriti, and Immunefi. It orchestrates existing scanners (subfinder, httpx, nuclei, katana, ffuf, dalfox) behind a multi-provider LLM layer (Ollama, Groq, DeepSeek, Claude, OpenAI) and cross-session "hunt memory," and also ships an MCP server for use from Cursor, Codex, or OpenCode.
github.comrepoAdded 21 Sep 2026🛡️ Security - Oldcircle/geo-sleuth
geo-sleuth is an open-source Agent Skill that lets any tool-using agent (Claude Code, Codex, Cursor, Gemini CLI, OpenCode, GitHub Copilot) geolocate a photo without relying on text, license plates or landmarks, instead using OpenStreetMap geometry, elevation data, satellite tiles and street view. It structures the task as a scored candidate board with ~20 single-purpose Python scripts (sun/terrain/osm/pose analysis, CLIP-ranked satellite matching, DINOv2+SIFT street-view matching) that do the ranking, while the LLM only judges among top candidates and must cite the command/file behind every claim. Output includes coordinates with an error radius, camera heading, and an evidence image.
github.comrepoAdded 26 Sep 2026, published 18 Sep 2026🧠 AI - OWASP Agentic Skills Top 10 (AST10)
The OWASP Agentic Skills Top 10 (AST10) is a new security framework cataloging the 10 most critical risks in AI agent "skills" — the behavior layer that orchestrates multi-step tool use in OpenClaw, Claude Code, Cursor/Codex, and VS Code. It documents real 2026 incidents (the ClawHavoc registry-poisoning campaign with 1,184 malicious skills, Snyk's ToxicSkills audit of 3,984 skills finding 36.82% flawed, CVE-2025-59536/CVE-2026-21852 RCE in Claude Code project files, and CVE-2026-28363 ClawJacked WebSocket hijacking) and proposes a Universal Skill Format (YAML) with signing, permission allowlists, and identity-file protections to mitigate them, mapped to CSA's MAESTRO 7-layer threat model.
github.comrepoAdded 18 Sep 2026🛡️ Security - leepokai/jev-guard
jev-guard is an MIT-licensed hook layer that adds an auto mode to Claude Code, Codex, Copilot CLI, Gemini CLI, Cursor, pi, OpenCode, Antigravity and ACP editors. It asks the Jev model three typed questions (risk, user_requested, from_untrusted) per tool call and decides deny, ask or allow in about 20 lines of code. It also scans tool results for prompt injection and checks skills and plugins.
github.comrepoAdded 27 Oct 2026, published 17 Sep 2026🧠 AI - Maskit
Maskit is a local privacy gateway that sits between AI coding tools (Cursor, Claude Code, Codex, ChatGPT, Claude, DeepSeek) and the model provider, automatically redacting sensitive data — API keys, database connection strings, private IPs, PEM keys, JWTs, PII like phone numbers/ID numbers — into placeholders before requests leave the machine, then streams responses back with the placeholders transparently restored. It works as a local reverse proxy (per-protocol ports for OpenAI/Anthropic/DeepSeek) plus a browser extension (Chrome/Edge MV3) that intercepts Fetch/XHR traffic on ChatGPT, Claude and DeepSeek web UIs, including redaction of uploaded Office documents. It also includes a lightweight local ONNX NER model for names/orgs/addresses, placeholder consistency across multi-turn conversations, and passive prompt-injection detection on model replies.
github.comrepoAdded 22 Sep 2026, published 15 Sep 2026🛡️ Security - WordPress Security Skills
WordPress-Security-Skills is a GitHub repo of modular 'Agent Skills' (per the open Agent Skills spec) that install into AI coding agents like Claude Code, Cursor, Codex, OpenCode, and Gemini CLI to guide secure-by-default WordPress plugin/theme development and security code review. Each skill targets a documented failure mode in AI-generated WordPress code — missing nonce checks, broken authorization, missing output escaping, unprepared SQL queries — with when-to-use guidance, common AI mistakes (wrong vs right), code examples, and checklists tied to official WordPress API references. It is explicitly instructional Markdown/PHP reference material, not a scanner or automatic protection, meant for developers and reviewers auditing AI-written or third-party WordPress code.
github.comrepoAdded 22 Sep 2026, published 15 Sep 2026🛡️ Security - shinthink/blitzstrike
Blitz Strike is an open-source Model Context Protocol server (TypeScript/Bun) that packages a structured 3-tier pentesting methodology — BLITZ (attack-surface recon), EAGLE-EYE (source-to-sink reachability tracing), and STRIKE (live validation before reporting) — into callable tools any MCP client (Claude Code, Cursor, Gemini, etc.) can drive with a single run_engagement call. It ships 130 self-written security tools, 317 indexed tool manuals, 58 data-driven escalation chains with negative-control checks, a Web3/Solidity audit module with Foundry proofs, and a regression/benchmark suite (453 checks, reported 1.0 detection / 0 false-positive rate) to make every finding verified rather than pattern-matched.
github.comrepoAdded 2 Oct 2026, published 12 Sep 2026🛡️ Security - sage — Agent Detection & Response (ADR) for AI coding agents
Sage is an "Agent Detection & Response" (ADR) security layer that intercepts tool calls made by AI coding agents — shell commands, URL fetches, file writes — and screens them through multiple detection layers before execution. It combines cloud URL reputation, 300+ YAML local heuristics, a two-tier (heuristic + fine-tuned ML) prompt-injection detector for fetched content, npm/PyPI package supply-chain checks (registry existence, file reputation, age), installed-plugin scanning at session start, and Windows AMSI integration. It ships as a plugin for Claude Code, Cursor, VS Code, OpenClaw, and OpenCode, and is published by Gen Digital (also distributed under the Norton/Avast Sage branding).
github.comrepoAdded 10 Sep 2026🛡️ Security - headroomlabs-ai/headroom
Headroom is an open-source (Apache 2.0) local compression layer that sits between AI agents and LLM providers, compressing tool outputs, logs, RAG chunks, files and conversation history before they reach the model. It offers a Python/TypeScript library, a drop-in proxy, an `headroom wrap` mode for popular coding agents (Claude Code, Codex, Cursor, Copilot, Aider, etc.), an MCP server, cross-agent shared memory with dedup, and output-token reduction via verbosity steering and effort routing — all running locally with reversible compression (CCR) so originals stay retrievable.
github.comrepoAdded 23 Sep 2026, published 7 Sep 2026🧠 AI - kajisho5/ffmpeg-skill
ffmpeg-skill is an Agent Skill (SKILL.md plus 42 stdlib-only Python tools) that lets Claude Code, Cursor, Codex and other agents edit video and audio with local ffmpeg/ffprobe. It enforces a probe → edit losslessly → check → verify workflow, and every tool takes --dry-run, --json and --plan. A machine-readable contract, whose input schemas are derived at run time from each script's argparse parser (the author's "SPEC" pattern), drives an MCP server that lists a core 12 tools by default. The repo also ships per-platform render templates, a doctor capability check, a test suite and evals. It is useful as a worked example of a deterministic, verifiable skill/tool layer in which the agent supplies judgement and the tools do the work.
github.comrepoAdded 16 Oct 2026, published 3 Sep 2026🧠 AI - emlai/defi-native-skill
An open-source Agent Skill ("defi-native") that teaches Claude Code, Cursor, Codex and other Agent-Skills-compatible agents capital-markets and DeFi domain knowledge, including yield decomposition, vault/curator anatomy, oracle classes, and stablecoin/RWA taxonomy. It is structured with progressive disclosure (SKILL.md routes to task-specific reference files only when needed), an api-routes.json router that forces live data pulls (vaults.fyi, DefiLlama, Morpho's GraphQL, rwa.xyz, Merkl, 130+ protocol docs) before any numeric claim, and a verified 90+ source manifest. The author describes an eval-gated release process (paired with/without-skill runs graded on structure) and adversarial review by independent models before publishing, making it a useful case study in skill engineering even for readers uninterested in DeFi itself.
github.comrepoAdded 2 Oct 2026, published 28 Aug 2026🧠 AI - vibecheck
vibecheck is a free, open-source, client-side scanner that checks apps built with AI code generators (Lovable, Bolt, v0, Cursor, Claude Code) for common security holes: exposed Supabase Row Level Security / Firebase rules, secrets embedded in the client bundle (Stripe/AWS/DB keys), missing security headers, exposed .env/.git/source maps, unauthenticated LLM proxy or MCP endpoints, and email/TLS misconfigurations. It also scans public repos for cross-tenant IDOR patterns, committed secrets, an OSV.dev supply-chain check, a Dockerfile lint, and generates a CycloneDX SBOM; a companion CLI (tenant-guard) adds a live Postgres cross-tenant isolation test as a CI gate. The project cites CVE-2025-48757 (170+ Lovable apps found with RLS disabled) as motivation.
github.comrepoPublished and added 27 Aug 2026🛡️ Security - Cybermes
Cybermes is an open-source bug bounty and pentest automation framework that pairs a native Go MCP server (cybermes-mcp) with an autonomous Hermes CLI agent, orchestrating recon tools (subfinder, httpx, katana, ffuf, Nuclei, sqlmap), 200+ offensive playbooks covering IDOR/BOLA, JWT, SSRF, XSS, SQLi and cloud misconfig, and a validation-gate workflow that writes non-destructive PoC scripts before compiling findings into Markdown/HTML/PDF reports. It exposes its tools over JSON-RPC 2.0 to AI coding assistants (Claude Desktop, Cursor, Windsurf, Cline, Gemini/Antigravity) so an external LLM can drive scoped, evidence-backed security assessments.
github.comrepoPublished and added 23 Aug 2026🛡️ Security - Uber ADR (Agentic AI Detection and Response)
ADR (Agentic AI Detection and Response) is Uber's open-source enterprise security system for AI agents, covering discovery of unsanctioned AI tools on endpoints, telemetry capture of agent intent/tool-use/execution traces, a benchmark (ADR-Bench: 300+ tasks, 134 MCP servers, 17 agent attack techniques), and a dual-agent detector for risky agent behavior. It is deployed in production at Uber to secure employee-facing coding agents (Cursor, Claude Code, Codex, GitHub Copilot CLI, DeepSeek) and customer-facing support agents; the accompanying paper was accepted to MLSys 2026. The prevention component and offline red-teaming engine (ADR Explorer) are not included in the open-source release.
github.comrepoPublished and added 21 Aug 2026🛡️ Security - Superior-Trade/trading-terminal
Open-source (Apache-2.0) AI trading terminal for Hyperliquid where a user sketches a chart read (trendlines, levels, fib retracements) and an agent turns it into a ranked trade setup with entry, stop and target, then generates a Freqtrade Python strategy to trade it. The generated strategy passes through a validator that catches unsafe patterns and sends failures back to the model in a repair loop until the code is safe to deploy, a pattern documented in docs/strategy-pipeline.md. It is self-hostable or available as a hosted build, and also exposes an agent-facing entry point (SKILL.md) for coding agents like Claude Code, Codex and Cursor to trade directly without the UI.
github.comrepoAdded 2 Oct 2026, published 21 Aug 2026🧠 AI - yetone/cumora
Cumora is a cross-platform team-chat application where AI agents sit alongside humans as first-class participants — holding persistent personas and memory, claiming Kanban work, coordinating with each other, and sending real email — rather than only responding when addressed. Agents can run on Cumora's cloud (per-agent Kubernetes pods driving a multi-hop tool-calling loop over the OpenAI Responses API) or in "Bring Your Own Agent" mode, pairing a local Mac/VPS daemon with an existing coding-agent backend (Claude Code, Codex, Cursor Agent, Gemini CLI, OpenCode, Qwen Code, Google Antigravity, etc.) while keeping provider keys off the server. The repo documents a concrete coordination design — a seen-cursor freshness gate that holds stale replies, atomic claims on units of work, a small-brain triage gate, and a transactional Postgres outbox for realtime fan-out — making it a useful reference for building multi-agent systems that avoid agents colliding on shared work.
github.comrepoAdded 30 Sep 2026, published 17 Aug 2026🧠 AI - galleonlabs/hypergrok-trading-desk
HyperGrok Trading Desk is an open-source "Agent Skills" pack (MIT licensed) that turns a Grok Bot, Claude Code or Cursor instance into a coordinated seven-agent trading desk for Hyperliquid perpetuals, using seventeen portable SKILL.md skills covering bootstrap/setup, exchange API access, and desk operating procedures. Each trade moves through a fixed pipeline — idea, evidence, risk sign-off, explicit human approval by ticket id, a single execution agent that sends the order, reconciliation, and a separate review agent — with read-only "opening bell" and "desk doctor" scripts for zero-key market snapshots and release/connectivity checks. The design choices worth noting for agent builders are the one-writer/many-readers pattern, sizing risk off the stressed (slipped) cost of a stop rather than its trigger price, and keeping the approval gate (Grok Bot's Require Approval rule) outside the chat the agent itself can write to.
github.comrepoAdded 5 Oct 2026, published 16 Aug 2026🧠 AI - Andrej Karpathy Skills
A single CLAUDE.md file (also packaged as a Claude Code plugin and Cursor rule) that encodes four principles derived from Andrej Karpathy's public observations on LLM coding failure modes: surfacing assumptions and ambiguity instead of silently guessing, avoiding overengineered/bloated code, touching only what's necessary when editing, and using verifiable success criteria for goal-driven execution loops. It's distributed as a drop-in instructions file, a Claude Code marketplace plugin, and a committed Cursor project rule.
github.comrepoAdded 22 Sep 2026, published 15 Aug 2026🧠 AI - miqdadbadjuber/anti-slop
anti-slop (antislop) is a rulebook packaged as agent skills that stops AI coding agents from shipping generic UI, filler copy, and formulaic 'AI-shaped' code, without prescribing colors, fonts, or layout. It defines 38 mandatory rules across three tiers (Hard Gate, Purpose-Gate, Quality Locks), a 'Liveliness Toolkit' of ENERGY/RHYTHM/MOTION dials plus a Design Read, and a PASS/FAIL Delivery Gate report run before work ships, split into six loadable skills. It installs via an npx installer, a plugin marketplace, or the skills.sh directory across a dozen agents including Claude Code, Codex, Cursor, OpenCode, Cline, Amp, Gemini CLI, GitHub Copilot, Antigravity, Hermes, Kimi Code, and Pi.
github.comrepoAdded 30 Sep 2026, published 7 Aug 2026🧠 AI - autonomous-ai/openharness
OpenHarness (Autonomous) is an open-source command center for running coding agents such as Claude Code, Codex, Cursor, OpenCode, Devin, Amp and Copilot. A native app and per-machine daemon run each agent in its own tmux pane, with a git worktree per harness. Machines are linked by password, with end-to-end encrypted traffic over direct WebRTC, Cloudflare TURN or a keyless relay. It also supports local models (Ollama, MLX-LM, vLLM, Grid) and a Store of domain-specific harnesses (Blender, CircuitJS, MuJoCo, Godogen, Strudel, RDKit, Typst) defined by a harness.json. An optional open-hardware always-on display device shows agent status.
github.comrepoAdded 16 Oct 2026, published 4 Aug 2026🧠 AI - AMAP-ML/LongHorizon-Harness
LongHorizon-Harness (AMAP-ML, package lh-harness) is a Python tool that wraps existing coding/computer-use agents (Claude Code, Codex, OpenCode, DeepSeek Harness) in a durable plan → act → verify → checkpoint/recover loop. It separates Manager, Executor and Auditor roles, accepts only independently verified progress as task state, and restarts rounds from the original goal plus the last verified checkpoint. It supports GUI and terminal workflows via computer-use MCP plugins (codex-computer-use, open-computer-use, clawdcursor), a React/FastAPI web workbench, per-role model and backend selection, and eval suites including Terminal-Bench 2.1; an arXiv paper accompanies it.
github.comrepoAdded 12 Oct 2026, published 4 Aug 2026🧠 AI - System Prompts Leaks
A community-maintained repository that archives leaked or extracted system prompts — the hidden instructions given to LLM chatbots before user input — captured verbatim from products including Claude/Claude Code, ChatGPT/Codex, Gemini, Grok, Cursor, Copilot, Perplexity, Meta AI, Mistral, DeepSeek, GLM, and others. It serves as a reference corpus for studying system prompt design, extraction techniques, and the system prompt leakage risk class, and is updated regularly as new prompts are exfiltrated from newer model releases.
github.comrepoAdded 3 Sep 2026, published 3 Aug 2026🛡️ Security - asgeirtj/system_prompts_leaks
This GitHub repository collects verbatim leaked/extracted system prompts — the hidden instructions and guardrails — from a wide range of AI products including Claude.ai, Claude Code, ChatGPT, Codex, Gemini, Grok, Perplexity, Microsoft Copilot, Cursor, Meta AI, Mistral, Kimi, DeepSeek, GLM, Qwen and others. It is updated regularly as new prompts are captured, and serves as reference material for AI red-teamers and researchers studying how vendors constrain model behavior and how those constraints can be extracted or bypassed.
github.comrepoPublished and added 3 Aug 2026🛡️ Security - UseOSINT/Skills
UseOSINT/Skills is a GitHub repo of 28 SKILL.md files that let Cursor, Claude, and other coding agents run open-source-intelligence investigations — 10 end-to-end workflows (e.g. find-anyone, x-ray-a-company, recon-a-domain-passively) built on 18 reusable technique skills (WHOIS, certificate transparency, reverse image search, breach lookups, chronolocation). Each skill ships with reference material (query cookbooks, indicator guides, registry catalogues) and an install script that symlinks the whole set into ~/.cursor/skills, illustrating a chained, workflow-plus-technique pattern for structuring and routing large agent skill libraries. The repo also documents scope/authorization gating and passive-by-default behavior as part of the skill design.
github.comrepoAdded 30 Sep 2026, published 2 Aug 2026🧠 AI - ops-engineering-skills
ops-engineering-skills is an open-source library of 296 Agent Skills covering DevOps, DevSecOps, cloud, Kubernetes, CI/CD, GitOps, security scanning, SRE, compliance, databases, messaging, service mesh, serverless, internal developer platforms, MLOps and AgentOps. Each skill is written once to the open SKILL.md standard with machine-checkable frontmatter and eight required sections (prerequisites, steps, pitfalls with fixes, worked example), and works natively across Claude Code, GitHub Copilot, OpenAI Codex, Cursor and Gemini CLI without a translation layer. It ships an automated validator, cross-reference integrity checks, a marketplace/plugin structure for Claude Code, and a generic install.sh/npx installer for any Agent-Skills-compliant agent.
github.comrepoAdded 22 Sep 2026, published 1 Aug 2026🧠 AI - genspark-ai/genoffice
GenOffice is an open-source (Apache-2.0) desktop office suite for macOS/Windows/Linux that opens native .docx/.xlsx/.pptx/PDF/Markdown/HTML files and puts an AI agent inside the editor, applying edits as byte-preserving diffs, tracked changes and live spreadsheet formulas rather than pasted text. It exposes the same engines to coding agents via a `genoffice` CLI, a bundled skill for Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf, and an MCP server with 29 tools (plus an HTTP variant for headless/remote use), and includes a local SQLite full-text file search optionally reranked by TypeSafe's Jev judgment model. Users can bring their own key (Claude, OpenAI, Gemini, DeepSeek, and others) or sign in with Genspark to route model calls through a proxy.
github.comrepoAdded 30 Sep 2026, published 31 Jul 2026🧠 AI - OpenOSINT
OpenOSINT is a Python OSINT agent that wraps 20 investigation tools (holehe for email enumeration, sherlock for username lookup, sublist3r for subdomain enumeration, phoneinfoga for phone intel, plus HaveIBeenPwned, Shodan, VirusTotal, Censys, AbuseIPDB, IP2Location, DNS/SPF/DMARC checks, GitHub, and Bright Data-powered dorking/scraping) behind a natural-language AI interface that issues deterministic tool calls so findings can't be hallucinated. It ships as a REPL, CLI, MCP server (usable from Claude Code/Desktop, Cursor, Windsurf), or browser web UI, with an optional additive FollowTheMoney entity graph for correlating findings and pivoting between investigation results, plus documented reverse-proxy/credential-handling behavior for remote deployments.
github.comrepoPublished and added 31 Jul 2026🛡️ Security - redhat-et/ripwire
Ripwire is an offline, single-binary CLI (with optional MCP server) that indexes a repository to give coding agents a ranked, deterministic call graph, task-oriented context bundles (--for, --pack-task), and edit-time checks (--edit-check, --quality-delta, --test-gate) that flag blast radius, contract breakage, and code-quality regressions. It installs skills for Claude Code, Codex, Cursor, Windsurf, Gemini, opencode and aider, and ships extensive self-published benchmarks (docs/EVALS.md, LocBench-style head-to-head comparisons against graph-database MCP servers like codebase-memory-mcp, repowise, graphify and aider) claiming large token and latency savings plus higher file@10 retrieval accuracy. The README includes a detailed field report on using it across a ~20-agent, ~1,500-file C++/Metal orchestration engagement.
github.comrepoAdded 2 Oct 2026, published 29 Jul 2026🧠 AI - QoderAI/better-harness
Better Harness is an MIT-licensed plugin/CLI from QoderAI that runs inside a coding agent (Claude Code, Codex, Qoder, Cursor, GitHub Copilot CLI, Qwen Code, Pi, Kimi Code and others) via a /better-harness command. It collects project and session evidence and scores five dimensions of the "Agent Work Loop" (feedforward guides like AGENTS.md, specs and Skills; feedback sensors like linters, tests and Hooks). It outputs HTML/Markdown/Canvas reports with prioritized findings, repair plans and acceptance checks, and keeps missing evidence explicit rather than inventing scores.
github.comrepoAdded 12 Oct 2026, published 21 Jul 2026🧠 AI - luqman-v1/9router-go
9router-go is a single-binary Go port of 9Router, an LLM gateway that sits between CLI coding tools (Claude Code, Cursor, Codex, Cline, OpenClaw, Gemini CLI, OpenCode) and 40+ AI providers/100+ models. It adds RTK token compression (claimed 20-40% token savings on tool_result content), tiered auto-fallback (subscription → cheap → free providers), multi-account round-robin, per-key proxy pools, and an embedded Svelte dashboard backed by SQLite, with database compatibility to share state with the original Next.js 9Router. It targets the practical problem of coding-agent subscription quota exhaustion and token cost, not a research contribution.
github.comrepoAdded 7 Oct 2026, published 18 Jul 2026🧠 AI - Destructive Command Guard (dcg)
Destructive Command Guard (dcg) is a Rust-based hook that intercepts and blocks catastrophic commands (git reset --hard, rm -rf, DROP TABLE, kubectl delete namespace, terraform destroy, etc.) before AI coding agents like Claude Code, Codex CLI, Gemini CLI, GitHub Copilot CLI, and Cursor can execute them. It uses a modular "pack" system covering 50+ categories (databases, cloud providers, Kubernetes, secrets managers, CI/CD, storage, DNS, payments) plus a three-tier heredoc/inline-script AST scanning pipeline to catch destructive commands hidden inside python -c/bash -c payloads, and a dedicated "careful_company_running_windows" preset that also blocks data-exfiltration channels (webhooks, uploads, tunnels) and attempts to disable security controls. Configurable via TOML with agent-specific trust profiles, allowlists, and fail-closed/fail-open policies for unattended agent sessions.
github.comrepoPublished and added 15 Jul 2026🛡️ Security - HOL Guard
HOL Guard is an open-source local "antivirus" runtime protection layer for AI coding agents that intercepts shell commands, file access, package installs, and MCP tool calls before execution, classifying them for secret exposure, destructive operations, prompt injection, and supply-chain risk, then allowing/blocking/requesting approval per policy. It integrates via native hooks and managed MCP proxies with Codex, Claude Code, GitHub Copilot CLI, Cursor, Cline, Gemini CLI, Grok, and other agents, and includes a supply-chain package/advisory checker (hol-guard supply-chain scan/explain). The repo also bundles plugin-scanner, a companion CLI/GitHub Action that lints and scores agent plugins, skills, and MCP integrations for manifest issues, secrets, MCP transport risks, and dependency/lockfile problems, producing SARIF/JSON reports for CI gating.
github.comrepoPublished and added 15 Jul 2026🛡️ Security - trailhq/Graft
Graft (npm package @nanonets/graft) builds a local, regenerable code graph from a repo — markdown nodes summarizing subsystems plus a per-symbol tree-sitter wiring graph — and wires it into coding agents like Claude Code, Codex, Cursor and Gemini so they no longer re-explore the codebase from scratch every session. It ships an MCP server, CLI commands (ask/grep/callers/skeleton/map/blast/viz), and Claude Code-specific hooks (statusline, blast-radius warnings, auto-resync). The project reports its own benchmarks: a 162-run internal harness and a 50-instance SWE-bench Verified comparison where graft-augmented Claude Sonnet 5 resolved 33/50 instances vs. 27/50 for cold Claude Code, with fewer tool calls, tokens and wall-clock time.
github.comrepoAdded 30 Sep 2026, published 3 Jul 2026🧠 AI - Reverse-Skill
Reverse-Skill is a GitHub repo that gives AI coding agents (Claude Code, Codex, Cursor, OpenCode) a structured routing layer for reverse engineering and offensive security work: it detects the task type (APK, ELF binary, JS obfuscation, PCAP, CTF challenge) and routes to the correct methodology and toolchain (jadx, apktool, Frida, IDA Pro, Ghidra, radare2, Burp Suite, nmap, Metasploit) instead of letting the agent guess commands. It ships a case-init/scope workflow, an evidence-to-finding-to-report pipeline, a 173-case routing regression test run in CI on Windows and Ubuntu, and platform-specific docs for Kali/Ubuntu/macOS, positioned for lawful research, CTF, and authorized pentesting.
github.comrepoPublished and added 21 Jun 2026🛡️ Security - Pipelock
Pipelock is an open-source (Apache 2.0 core) AI agent firewall that sits between agents and the network, mediating HTTP, WebSocket, MCP, and A2A traffic to detect secret exfiltration, prompt injection, SSRF, and MCP tool poisoning. It scans request/response bodies with a DLP engine (65 built-in patterns, checksum validation), streaming SSE inspection, and MCP tool-call chain analysis, then emits Ed25519-signed, hash-chained action receipts so decisions can be verified offline outside the agent runtime. It also offers OS-level containment (Landlock/seccomp/sandbox-exec), a kill switch, canary tokens, and integrations for Claude Code, Cursor, VS Code, OpenAI Codex, LangGraph, CrewAI, and other agent frameworks.
github.comrepoPublished and added 14 Jun 2026🛡️ Security - mukul975/Anthropic-Cybersecurity-Skills
A community-maintained GitHub repo providing 818 structured, YAML-frontmatter skill files (e.g. Volatility3 memory forensics, Kerberoasting hunting, cloud breach scoping) that AI coding agents like Claude Code, GitHub Copilot, or Cursor can load to follow senior-analyst-level security workflows. Each skill is mapped against MITRE ATT&CK v19.1, MITRE ATLAS, MITRE D3FEND, NIST CSF 2.0, NIST AI RMF, and the newly released MITRE Fight Fraud Framework (F3), and follows the agentskills.io progressive-disclosure standard for token-efficient agent discovery. Covers offensive (red-team C2, phishing simulation, exploitation), defensive (DFIR, threat hunting, Sigma detections), cloud, and AI-security domains.
github.comrepoPublished and added 26 May 2026🛡️ Security - Superpowers
Superpowers is an open-source composable skills library and workflow methodology for coding agents, enforcing a pipeline of brainstorming/spec, plan-writing, subagent-driven or inline TDD implementation, and code review across git worktrees. It ships as a plugin installable into Claude Code, Codex, Cursor, Gemini, Copilot, Grok, and many other agent harnesses, with skills like test-driven-development, systematic-debugging, and writing-plans that auto-trigger during a coding session.
github.comrepoAdded 22 Sep 2026, published 25 May 2026🧠 AI - H-mmer/pentest-agents
pentest-agents is an autonomous bug-bounty framework that wires Claude Code (and Codex, Gemini, Cursor, Windsurf, VS Code Copilot, OpenClaw) with 50 specialized agents, 26 slash commands, 19 CLI tools, 11 methodology skills, and two MCP servers — one for live bug-bounty platform integration (HackerOne, Bugcrowd, Intigriti, Immunefi, YesWeHack) and one for semantic writeup/payload search over a self-built FAISS index. It codifies a hunt workflow (recon → surface → hunt → validate via a 7-Question Gate → exploit-chain building → report → submit) with per-vuln-class hunter agents (XSS, SQLi, SSRF, SSTI, IDOR, XXE, RCE, CORS, subdomain takeover, etc.), a persistent "brain" for endpoint tracking, CVSS-version policy enforcement, and a scope-check hook that blocks out-of-scope Bash commands before execution.
github.comrepoPublished and added 18 May 2026🛡️ Security - OpenUI
OpenUI is a full-stack, renderer-agnostic Generative UI framework centered on OpenUI Lang, a compact streaming-first language for model-generated UI that uses up to 67% fewer tokens than JSON. It provides React runtime and headless packages, prebuilt component libraries (charts, forms, tables), prompt generation from component libraries, and integrations for LangChain/LangGraph, Vue, Svelte, and Angular, plus a CLI scaffolder and an Agent Skill for coding assistants like Claude Code and Cursor.
github.comrepoAdded 22 Sep 2026, published 12 May 2026🧠 AI - matty69v/Bug-Bounty-Agents
Bug-Bounty-Agents is a collection of 43 specialized LLM system-prompt personas (recon, web hunting, exploit chaining, reporting, scope-guard, etc.) that turn Claude Code, Copilot Chat, Cursor, or any agent-capable LLM into offensive-security specialists for bug bounty and pentest engagements. It ships an install script that auto-detects and deploys agents to the correct client directories, and documents pairing the agents with PortSwigger's Burp Suite MCP server so an LLM can drive live traffic through Burp while following the repo's methodology.
github.comrepoPublished and added 12 May 2026🛡️ Security - Pantheon-Security/medusa
MEDUSA is an AGPL-3.0 CLI security scanner (pip install medusa-security) built specifically for the AI/agentic era, shipping 40,000+ detection patterns across 79 scanner types for AI/ML apps, MCP servers, RAG pipelines, and traditional code, with zero external tool installation required. It detects AI supply-chain attacks like repo poisoning through weaponized editor configs (Cursor, Cline, Windsurf, Claude Code, Copilot, Kiro), MCP tool/schema poisoning, and prompt injection, and includes a `medusa secrets scan/purge` command that finds and redacts leaked API keys (21 issuer types) inside Claude Code, Cursor, Copilot, Gemini and shell REPL history files. It also carries a CVE database (200 entries) covering things like Log4Shell, XZ Utils, LangChain RCE, and the CVSS 10.0 React2Shell (CVE-2025-55182) RCE in React Server Components/Next.js.
github.comrepoPublished and added 10 May 2026🛡️ Security - KKKKhazix/khazix-skills
khazix-skills is a GitHub repo of practical Agent Skills the author has been using daily in their own projects, following the open Agent Skills standard supported by Claude Code, Codex, Qoder, Kimi Code, iFlow, CodeBuddy, Cursor and 40+ other agents. Each skill is a structured instruction set (SKILL.md) an agent can load directly, with examples named like neat-freak, hv-analysis and khazix-writer; users can install by pointing their agent at a skill's GitHub subdirectory, or manually paste the SKILL.md content as project rules for agents without native skill support.
github.comrepoAdded 22 Sep 2026, published 8 May 2026🧠 AI - AI Repository Security Baseline
A collection of drop-in instruction/config files (AGENTS.md, CLAUDE.md, .cursor/rules, .aiignore, etc.) that give AI coding agents a shared security and privacy playbook: never read .env or secrets files, no hardcoded credentials, OWASP hygiene, PII protection, GDPR support, restricted filesystem/network access, no destructive commands without confirmation, mandatory tests, and dependency/CI change controls including typosquatting checks before adding packages. Each tool-specific file (Cursor, Copilot, Windsurf, Cline, Aider, Amazon Q, Junie, Devin, Cody) delegates to one canonical AGENTS.md so teams maintain a single source of truth across all agents in use.
github.comrepoAdded 3 Sep 2026, published 8 May 2026🛡️ Security - CodeBurn
CodeBurn is a free, open-source CLI/desktop tool that reads the local session files written by 41 AI coding tools and agents (Claude Code, Cursor, Codex, Gemini, Grok, etc.) to break down token usage and dollar cost by model, project, and task. It adds an 'optimize' scanner that detects waste patterns (re-reads, low read:edit ratios, unused MCP servers, bloated CLAUDE.md files) with auto-applicable fixes, a 'guard' feature for per-session cost caps via Claude Code hooks, and a 'yield' command that correlates spend with actual shipped commits.
github.comrepoAdded 22 Sep 2026, published 7 May 2026🧠 AI - anmolksachan/AI-ML-Free-Resources-for-Security-and-Prompt-Injection
A GitHub-hosted, structured learning roadmap for AI/ML security and prompt injection, covering prerequisites (web/API basics), LLM fundamentals (OWASP LLM Top 10 2025, MITRE ATLAS), attack classes (prompt injection, indirect prompt injection, jailbreaking, multi-turn attacks, MCP tool poisoning, RAG poisoning, model extraction, supply chain), and hands-on labs/tools (Garak, PyRIT, ART, CleverHans, ModelScan). It also catalogs named CVEs in AI coding assistants (CVE-2025-53773 GitHub Copilot RCE, CVE-2025-54135 Cursor IPI-to-RCE) and points to bug bounty platforms, checklists for pentesting LLM apps, and community resources (AI Village, Embrace the Red, r/llmsecurity).
github.comrepoPublished and added 7 May 2026🛡️ Security