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Claude Code 2.1.313 Cursor backdoor response guide

AI developer-tool supply chain incident · Cursor · Intermediate to advanced

Use this if Claude Code for VS Code may have updated through Cursor's marketplace on October 29, 2026.

Claude Code, Cursor, supply chain, SSH backdoor, developer security

Embedded browser flaws in five AI coding assistants

AI coding assistant security analysis · Forever Security · Intermediate to advanced

Use this if your team previews local HTML or browses from an AI coding assistant. Check patch status, trusted projects and credential exposure before continuing.

Codex, VS Code, Cursor, GitHub Copilot, Claude Desktop

Claude exploit-chain research explained

AI-assisted vulnerability research analysis · Anthropic · Intermediate to advanced

Use this after Anthropic's October 27, 2026 disclosure to verify the five public patch records and prioritize browser and operating-system updates.

Claude, vulnerability research, Chrome, Safari, Android

Anthropic IPO filing explained

AI company analysis · Learnetto · Intermediate

You want the confirmed numbers, governance structure and customer implications in Anthropic's public IPO filing without treating an incomplete prospectus as a finished offering.

Anthropic, Claude, IPO, S-1, AI economics

AGENTS.md Downloads-folder hijack explained

Coding agent security analysis · Forever Security · Intermediate to advanced

Use this after running a coding agent in Downloads or another unreviewed folder. Audit instructions, configuration and credentials before the next session.

AGENTS.md, CLAUDE.md, Codex, Claude Code, prompt injection

Mythos 5 AISI incident: what the new analysis found

AI safety incident analysis · UK AI Security Institute · Intermediate to advanced

UK AISI and Anthropic published new analyses of a cyber test in which Mythos 5 targeted a real open-source maintainer. Learn what happened, what the replay studies found and how to contain long-running agents.

Claude Mythos 5, UK AISI, AI agent safety, supply chain security, agent monitoring

Claude Duet explained: Anthropic's proactive agent

AI product news analysis · Anthropic · Beginner to intermediate

Claude Duet is Anthropic's proactive AI agent for work. Learn how its background tasks, morning brief, approvals, connectors, limits and waitlist work before giving it access to business apps.

Claude Duet, Anthropic, Claude Opus 5.5, proactive agents, background agents

Model Context Protocol Tutorial

Free tutorial · Matt Pocock · Intermediate

You want to understand MCP and build TypeScript MCP servers over stdio or HTTP, connect Claude Code to tools, use MCP prompts, and package servers for distribution.

mcp, typescript, claude code, tool calling, agents

AI Coding Dictionary

Dictionary · Matt Pocock · Beginner to intermediate

You want plain-English definitions for agentic coding concepts such as context windows, tools, MCP, handoffs, skills, subagents, feedback loops, and agent-ready work.

ai coding, agent vocabulary, context engineering, claude skills

Learn Anything With My /teach Skill

Guide / Claude skill · Matt Pocock · Beginner to intermediate

You want Claude to act as a personalized teacher that creates a learning mission, finds resources, generates interactive lessons, quizzes you, and keeps progress records.

claude skills, ai coding, personalized learning, interactive lessons

5 Agent Skills I Use Every Day

Guide · Matt Pocock · Intermediate

You want a practical entry point into Matt's everyday agent skills and how they fit into real software work.

claude skills, agentic workflows, ai coding, product planning

Real-world feature build with Claude Code: every step explained

Walkthrough · Matt Pocock · Intermediate

You want to see a real feature built with Claude Code from context gathering through implementation, verification, and iteration.

claude code, ai coding, agentic workflows, feature development

My Skill Makes Claude Code GREAT At TDD

Guide / Claude skill · Matt Pocock · Intermediate

You want an agent workflow that implements behavior with a red, green, refactor loop instead of jumping straight to broad code changes.

claude skills, tdd, ai coding, testing

triage: Turn Backlog Mess Into Agent-Ready Work

Guide / Claude skill · Matt Pocock · Intermediate

You want to turn messy backlog items and GitHub issues into clearer, agent-ready work.

claude skills, triage, github issues, agentic workflows

grill-with-docs: Align Before You Build

Guide / Claude skill · Matt Pocock · Intermediate

You want an AI interview process that uses docs and domain language to clarify a feature before implementation starts.

claude skills, product planning, domain modeling, agentic workflows

handoff: Move Context Between Agent Sessions

Guide / Claude skill · Matt Pocock · Intermediate

You need to preserve useful context across agent sessions without dragging an overloaded conversation forward.

claude skills, handoffs, context engineering, agentic workflows

MCP: Build Rich-Context AI Apps with Anthropic

Short course · DeepLearning.AI · Intermediate

You want a hands-on MCP course for connecting tools, context, and Claude-powered apps.

mcp, anthropic, tool use, context engineering, agents

Claude Code: A Highly Agentic Coding Assistant

Short course · DeepLearning.AI · Beginner to intermediate

You want a structured Claude Code course before using it on a serious codebase.

claude code, coding agents, developer tools, ai coding, anthropic

Anthropic evaluation guide

Evaluation methodology guide · Anthropic · Intermediate to advanced

Teams designing task-specific Claude and agent evaluation suites with realistic cases, clear success criteria, calibrated graders, and regression gates.

evals, llm evaluation, ai quality, cloud and provider evals

Claude Sonnet 5.5 explained

Model migration explainer · Anthropic · Intermediate to advanced

Anthropic released Claude Sonnet 5.5 on September 28, 2026. Use this guide to understand the efficiency claims, breaking API changes, and a safe migration test from Sonnet 5.

claude sonnet 5.5, claude code, coding agents, model migration, adaptive thinking

Claude and the ART enzyme system explained

AI-assisted science explainer · Anthropic · Intermediate

Anthropic reported ART on September 23, 2026. Use this explainer to separate what its agents found, what the lab confirmed, and what remains a hypothesis.

claude, ai agents, ai for science, biology, genome mining

An alignment assessment of recent cybersecurity incidents

AI safety incident assessment · Anthropic · Advanced

You want Anthropic's September 9, 2026 assessment of four incidents in which Claude models gained unauthorized access to real third-party systems during cybersecurity evaluations, including the model behaviors and evaluation-design failures involved.

anthropic, ai safety, cybersecurity, agent evaluation, alignment

Claude Fable 5.1 and Claude Mythos 5.1

Model launch and safety guide · Anthropic · Advanced

You want Anthropic's September 1, 2026 model announcement covering Fable 5.1 for general availability and Mythos 5.1 for trusted-access research use.

anthropic, claude, frontier models, coding agents, ai safety

Designing the hf CLI for agents

Agent tooling and evaluation guide · Hugging Face · Intermediate

You want a measured guide to agent-friendly CLI design, including structured output, retry-safe commands, independent grading, and benchmarks showing where higher-level tools reduce calls and token use.

hugging face, coding agents, hf cli, evals, codex

Hugging Face Skills

Open-source skills and tutorial · Hugging Face · Intermediate to advanced

You want reusable, open-source agent skills for training, fine-tuning, evaluating, quantizing, and publishing models with Codex, Claude Code, Gemini CLI, or another skills-compatible coding agent.

hugging face, agent skills, codex, claude code, model training

Give Your Coding Agents a Memory You Own

Open-source guide and repo · Hugging Face · Intermediate

You want a September 3, 2026 walkthrough of funes, an open-source local memory layer that indexes agent traces, preserves provenance, and lets Claude Code, Codex, pi, and Hermes recall decisions across sessions and machines.

hugging face, coding agents, agent memory, codex, claude code

Simon Willison on GPT-6 Astra

Model analysis · Simon Willison · Intermediate to advanced

You want a concise independent read of GPT-6 Astra's launch claims, benchmark caveats, long-context results, pricing, and early comparison with Claude Fable 5.1 and GPT-5.6 Sol.

gpt-6 astra, model selection, benchmarks, coding agents, long context

Claude Fable 5.1 model overview

Model docs · Anthropic · Intermediate to advanced

You need Anthropic's September 1, 2026 source of truth for Claude Fable 5.1 and invite-only Mythos 5.1, including model IDs, pricing, availability, long-horizon agent strengths, and breaking changes from Fable 5.

anthropic, claude fable 5.1, claude mythos 5.1, frontier models, model selection

Prompting Claude Fable 5.1

Prompting guide · Anthropic · Intermediate to advanced

You are testing or migrating to Claude Fable 5.1 and want model-specific guidance for effort, progress updates, tool-call batching, long tasks, compaction, subagents, file edits, and verification.

anthropic, claude fable 5.1, prompting, coding agents, tool use

Anthropic Browser Use

Guide · Anthropic · Intermediate to advanced

You want Anthropic's current browser-specific toolset for page structure, element references, forms, tabs, screenshots, and browser actions without giving an agent a full desktop.

anthropic, claude, browser use, browser automation, agents

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Claude models overview

Model docs · Anthropic · Beginner to advanced

You need the official comparison of the current Claude 5 family, context windows, aliases, and release families before choosing cost, speed, and reliability tradeoffs.

claude, anthropic, claude 5, model selection, frontier models

Anthropic Courses

Official learning hub · Anthropic · Beginner to advanced

You want Anthropic's current course list for Claude API work, MCP, Claude Code, skills, and AI fluency instead of piecing course links together from blog posts.

anthropic, claude, courses, mcp, claude code

Anthropic Academy

Official learning hub · Anthropic · Beginner to advanced

You want official Anthropic courses for AI fluency, Claude Code, MCP, or Claude API development before diving into narrower docs.

anthropic, claude, ai fluency, claude code, mcp

Anthropic Build with Claude overview

Guide · Anthropic · Beginner to intermediate

You want Anthropic's current implementation-first starting point for Claude apps, tool use, prompts, streaming, and API workflows instead of jumping straight into isolated reference pages.

anthropic, claude, build with claude, api, agents

Anthropic tool use overview

Guide · Anthropic · Intermediate

You want Anthropic's official explanation of where tools execute, how Claude decides to call them, and which tool patterns fit your workflow before building agent features.

anthropic, claude, tool use, agents, function calling

Anthropic CLI, SDKs, and libraries

Guide · Anthropic · Beginner to intermediate

You want Anthropic's current map of official SDKs, the `ant` CLI, and framework-specific libraries before choosing an implementation path or teaching setup steps.

anthropic, claude, sdk, cli, libraries