Guides, comparisons, and best practices for AI coding rules. Learn how to write effective CLAUDE.md, .cursorrules, and AGENTS.md files for your projects.
A rigorous methodology-first benchmark of the four leading AI coding tools — Cursor, Claude Code, Aider, and OpenAI Codex CLI — tested across five real-world task categories. With cost-per-task tables, hidden overhead analysis, and a recommendation matrix by use case.
A complete comparison of OrbStack and Docker Desktop for Mac developers in 2026. Real benchmarks on M2 MacBook Pro, pricing at team scale, Kubernetes support, Apple Containers context, and a clear decision guide for every use case.
A decision-focused deep dive into when to use sub-agents versus Agent Teams, with a full pattern catalog, cost and token analysis, failure mode taxonomy, and the honest case for not going multi-agent at all.
AGENTS.md を書いたら効いていると思い込んでいないか？指示の遵守率を測定し、欠如時との差分を計測し、サイレントに失敗しているルールを修正する系統的アプローチを解説する。
Most teams write AGENTS.md and assume it works. Here's a systematic approach to testing whether your instructions are followed, measuring the delta when they're absent, and fixing the rules that silently fail.
Going beyond cost optimization — learn how to actually see what Claude Code is doing. Hooks-based telemetry, JSONL transcript parsing, LangSmith/Langfuse integration, Grafana dashboards, and production-grade error tracing for Claude Code in 2026.
Claude Code がサブエージェントを生成すると、全員が同じ AGENTS.md を読む。でも専門特化したエージェントには、その役割に必要なコンテキストだけを渡すべきだ。エージェントごとの AGENTS.md 設計パターンを解説する。
When Claude Code spawns sub-agents, they all read the same root AGENTS.md — but that's often the wrong instructions for a specialized agent. Here's how to design per-agent AGENTS.md files that give each sub-agent the context it actually needs.
AGENTS.md はバージョン管理に入り、チームで共有され、公開リポジトリに上がることもある。何を書くべきで何を書くべきでないか、プロンプトインジェクション攻撃の実態まで具体的に解説する。
AGENTS.md files end up in version control, shared across teams, and sometimes public repositories. Here's a concrete guide to what belongs in them, what doesn't, and how prompt injection via AGENTS.md actually works.
The wrong file choice wastes your context budget and trains bad AI habits. 11 use-case templates with file selection rationale, ready-to-copy configurations, and a composition guide for multi-tool setups.
Gemini CLIがAGENTS.mdをサポートした。でも「互換性あり」は表面的な話。Claude Codeとどう解釈が違うのか、2ツール対応の書き方はどうすべきかを具体的に解説する。
Gemini CLI landed with its own take on AGENTS.md support. Here's exactly what it reads, what it ignores, and how to write instructions that work across both Gemini CLI and Claude Code without maintaining two files.
A practical guide to using Claude Code, Cursor, Codex CLI, and Aider for mobile development across Flutter, React Native, Swift/SwiftUI, and Kotlin/Compose — with CLAUDE.md and AGENTS.md templates for each framework.
AGENTS.mdにはスキーマも強制フォーマットもツールチェーンもない。ASTスタイルのパース・ルール定義・Pre-commitとCIに組み込めるCLIまで、軽量バリデーターをゼロから構築する。
AGENTS.md files have no schema, no enforced format, and no tooling. Here's how to build a lightweight validator from scratch — with AST-style parsing, rule definitions, and a CLI you can wire into pre-commit and CI.
Plan modeはコードレビューだけのものではない。CLAUDE.mdを1行も書く前に設計するための最適なツールだ。矛盾・ギャップ・過剰仕様を問題になる前に洗い出す実践的なワークフロー。
Plan mode isn't just for code review — it's the right tool for designing CLAUDE.md before you write a single line. Here's a practical workflow for using Claude's planning pass to surface conflicts, gaps, and over-specification before they become problems.
モノレポ環境では単一のAGENTS.mdでは対応しきれない。Nx・Turborepo・pnpmワークスペースを使った階層的AGENTS.md運用と、重複管理のコストを下げる実践パターンを解説。
AGENTS.mdは静かに陳腐化する。GitHub ActionsとPre-commitフックでドリフトを検知し、本番環境に影響が出る前にキャッチする実践的なワークフローYAMLとシェルスクリプト。
AGENTS.md is a living document that drifts silently. Here's how to wire GitHub Actions, pre-commit hooks, and automated review bots to catch staleness before it hits production — with real workflow YAML and shell scripts.
Monorepos break single-file AI instruction conventions. Here's how to use hierarchical AGENTS.md files across packages, workspaces, and CI contexts — with real Nx, Turborepo, and pnpm workspace patterns.
Cursor's .mdc Project Rules and AGENTS.md solve similar problems with different trade-offs. Here's a direct comparison of file formats, scoping behavior, activation logic, and the dual-stack setup that gets you the best of both.
CursorのProject Rules（.mdc形式）とAGENTS.mdは似た問題を異なるトレードオフで解決する。フォーマット、スコーピング、アクティベーション、デュアルスタック構成まで実例で比較。
CLAUDE.mdのトークン消費を40%以上削減する実践テクニック。@import構文、ファイル分割パターン、プロンプトキャッシュとの相性、実測削減量の計測方法まで解説。
Cut your CLAUDE.md token consumption by 40%+ without losing functionality. Covers @import syntax, file splitting patterns, lazy loading, prompt cache compatibility, and how to measure what you actually cut.
You have Codex CLI installed and AGENTS.md configured. Now what? This guide catalogs 7 proven workflow patterns — inline review, spec-driven generation, test-first refactor, multi-step planning, and more — plus AGENTS.md tuning, a feature comparison against Claude Code and Cursor, cost optimization, and the pitfalls that catch most developers off guard.
Does GitHub Copilot actually read AGENTS.md? Here's what happens under the hood — Copilot's custom instructions feature, how it compares to AGENTS.md, and how to set up both so neither Copilot nor Claude gets contradictory rules.
GitHub CopilotはAGENTS.mdをどう読むのか。Custom instructionsとの違い、Claude Codeとの共存設定、Copilot Workspaceでの階層活用まで実例で解説。
A technical guide to writing AGENTS.md for OpenAI Codex agents. Covers what Codex actually reads, differences from CLAUDE.md behavior, CI pipeline integration, and patterns that produce consistent results.
OpenAI Codex エージェント向けの AGENTS.md 執筆技術ガイド。Codex が実際に読むもの・CLAUDE.md との動作の違い・CI パイプライン連携・一貫した結果を生むパターンを解説。
Your .cursorrules file works, but it's locked to Cursor and ignored in Agent mode. Here's the complete migration path to AGENTS.md — conversion script, gotchas, and how to keep both working during the transition.
.cursorrulesはCursor ChatとComposerでは動くが、Agent modeでは無視される。AGENTS.mdへの移行手順、変換スクリプト、Cursor互換性の維持方法、よくあるハマりどころを解説。
How to configure Dev Containers alongside Claude Code for consistent AI-assisted development. Covers devcontainer.json setup, CLAUDE.md for container environments, MCP servers in containers, and team onboarding.
一貫した AI 支援開発のための Dev Container と Claude Code の組み合わせ設定。devcontainer.json・コンテナ環境向け CLAUDE.md・コンテナ内 MCP サーバー・チームオンボーディングまで解説。
Claude Code をプロジェクト固有のツールで拡張するカスタム MCP サーバーの構築方法。TypeScript SDK・ツールスキーマ設計・リソースエンドポイント・エラーハンドリング・settings.json による接続まで解説。
How to build a custom MCP server that extends Claude Code with project-specific tools. Covers the TypeScript SDK, tool schema design, resource endpoints, error handling, and connecting to Claude Code via settings.json.
When your monorepo grows past 50 packages, standard AI tool setups break down. This deep-dive covers 7 configuration patterns, per-tool walkthroughs for Nx, Turborepo, pnpm workspaces, and Bazel, plus token budget measurement, CI/CD integration, and the pitfalls that only appear at scale.
Claude Code で体系的なコードレビューを実施する方法。PR分析・セキュリティチェック・アーキテクチャフィードバック、そしてレビューモードと実装モードで動作を変えるCLAUDE.md設定まで解説。
How to use Claude Code for systematic code review — PR analysis, security checks, architectural feedback, and how to configure CLAUDE.md so review mode behaves differently from implementation mode.
A complete CLAUDE.md template tuned for TypeScript projects. Covers type safety rules, import conventions, error handling patterns, testing standards, and common anti-patterns to block.
TypeScript プロジェクト向けに最適化した CLAUDE.md テンプレート。型安全性・インポート規約・エラーハンドリング・テスト基準・禁止パターンを網羅したプロダクション対応版。
Claude Code のパーミッションシステムを徹底解説。信頼レベル・許可ツール・危険操作・settings.json によるプロジェクト別の許可/拒否リスト設定まで網羅。
Understand how Claude Code's permission system works: trust levels, allowed tools, dangerous operations, and how to configure project-specific allow/deny lists in settings.json.
.clinerules と Roo Code の .roo/rules/ を技術的に比較。ファイル構造・グロブマッチング・モード別設定・MCPパーミッションの違いから、プロジェクトに合った選択肢を解説します。
A deep comparison of .clinerules and Roo Code's .roo/rules/ system. Covers file format, glob matching, mode-specific config, context budget, and which tool fits your workflow in 2026.
Set up Claude Code for Flutter development with a complete CLAUDE.md template. Covers clean architecture, Riverpod state management, and platform-specific rules for iOS/Android.
Secure your AI coding workflow with OWASP-aligned CLAUDE.md rules. Copy-paste template covering injection prevention, auth validation, secrets management, and secure defaults.
Side-by-side comparison of Windsurf Rules (global_rules.md), Cursor Rules (.cursorrules/MDC), and AGENTS.md. Learn the scope, syntax, and migration path for each AI coding config format.
PythonプロジェクトのCLAUDE.md・.cursorrulesテンプレートを徹底解説。型ヒント、テスト規約、パッケージ管理、非同期パターンのルール設定でAIアシスタントの出力品質を向上。
Complete AI coding rules for React and Next.js projects — server vs client component rules, App Router conventions, TypeScript patterns, testing with Vitest, and production-ready CLAUDE.md templates.
Complete guide to writing AI coding rules for Python projects — CLAUDE.md templates, .cursorrules examples, type hints, testing conventions, packaging, and environment management for Claude Code and Cursor.
React・Next.jsプロジェクト向けの実用的なAIコーディングルール。サーバー/クライアントコンポーネントの判断基準、App Router規約、TypeScriptパターン、テスト設定のテンプレートを提供。
Claude Codeの記憶システムを実際に機能させる設計と運用方法。MEMORY.mdアーキテクチャ、セッション引き継ぎワークフロー、Auto Memoryの管理、チーム・個人開発者向けパターンを解説。
How to design and maintain a working Claude Code memory system — MEMORY.md architecture, session handoff workflows, Auto Memory curation, and patterns for teams vs. solo developers.
Claude Codeサブエージェントのベストプラクティスを網羅。タスク分解、AGENTS.md設計、コンテキスト受け渡し戦略、マルチエージェントワークフローの実用パターンを解説します。
Proven best practices for Claude Code subagents — task decomposition, AGENTS.md design, context passing strategies, and real-world patterns for multi-agent workflows that scale.
基本的な削減を超えたCLAUDE.mdの高度なトークン最適化技術。レイジーロード、条件付きセクション、メモリオフロード、実測方法を解説します。
Advanced token optimization strategies for CLAUDE.md beyond basic pruning — lazy loading, conditional sections, memory offloading, and real measurement techniques to reclaim your Claude Code context window.
CLAUDE.mdを効果的に書くためのステップバイステップガイド。何を書くべきかの特定方法、Claudeが実際に従う命令の書き方、CLAUDE.mdを悪化させる典型的なミスとその修正方法を解説。
A step-by-step process for writing effective CLAUDE.md files — how to identify what to include, how to phrase instructions Claude actually follows, and common mistakes that make CLAUDE.md files worse instead of better.
OpenAI Codex CLIでAGENTS.mdを活用する方法を解説。ファイル配置、構文、スコープ管理、実際の設定例、ベストプラクティスまで網羅。
Learn how to write and configure AGENTS.md for OpenAI Codex CLI. Covers file locations, syntax, scoping, real-world examples, and best practices for agentic coding.
.cursorrulesと.cursor/rules（MDC形式）の違いを徹底比較。構文の違い、スコープ管理、移行手順、プロジェクト規模別の選び方まで解説。
Compare .cursorrules and .cursor/rules MDC format side by side. Covers syntax differences, scoping, migration steps, and when to use each format in your Cursor AI workflow.
Everything you need to know about .windsurfrules — how they work, how they differ from .cursorrules and CLAUDE.md, and 12 practical examples you can use today.
AGENTS.md is becoming the standard for multi-agent AI instruction files. Learn exactly how to write one that actually works — with real examples, anti-patterns to avoid, and tested patterns for orchestrators, subagents, and hybrid setups.
How to wire Claude Code's hook system into pre-commit so linting, tests, and secret scanning run automatically before every commit. Includes copy-paste configs for Python, TypeScript, and polyglot repos.
A practical debugging workflow for Claude Code. Covers error reproduction, Plan Mode for complex bugs, test-driven debugging, hooks for auto-linting, and the /rewind escape hatch.
Learn how to connect Claude Code to external tools via MCP servers. Covers configuration, scoping, security, the top servers worth installing, and how Tool Search keeps context usage manageable.
A practical comparison of Claude Code and Cursor based on real benchmark data and workflow differences. Covers architecture, speed, accuracy, cost, and when to use each tool — including the hybrid setup most experienced developers have landed on.
Learn how to configure Cline with .clinerules files. Covers single-file and directory formats, YAML frontmatter, glob-based conditional rules, and 5 copy-pasteable templates.
Set up Claude Code Agent Teams for real parallel development. Covers the experimental feature, team configs, git coordination, CLAUDE.md optimization, and when to use it.
Copy-pasteable Cursor rules templates for React/Next.js, Python, Go, TypeScript, and more. Covers .cursorrules and the new .cursor/rules/*.mdc format.
A practical breakdown of Claude Code's four-layer memory system — CLAUDE.md, auto memory, MEMORY.md, and Auto-Dream — with honest coverage of what persists, what doesn't, and the patterns that actually survive session restarts.
Claude Code defaults to writing implementation first. Here is how to flip that with PreToolUse hooks, CLAUDE.md constraints, and a skill-based red-green-refactor loop that actually holds up across a full session.
How to measure, cut, and restructure your CLAUDE.md for maximum context efficiency. Covers token counting, what to prune, lazy-loading patterns, and how to reclaim 30–50% of your context window without sacrificing behavior.
Not just a .cursorrules conversion — a full workflow migration guide covering IDE habits, MCP setup, git integration, keybindings, and the mental model shift that actually makes Claude Code click.
Learn how to use git worktrees with Claude Code to run multiple AI sessions in parallel on separate branches. Covers the --worktree flag, subagent isolation, cleanup behavior, and real-world parallel task patterns.
A practical step-by-step guide to converting your existing Cursor rules to CLAUDE.md for Claude Code. Covers rule translation, what carries over, what needs rewriting, and how to support both tools from a single AGENTS.md.
A practical guide to writing effective AGENTS.md files for Claude Code and multi-agent systems. Covers format, scope hierarchy, entry design, tool permissions, and the patterns that make subagents actually useful.
Why Claude Code drains your context window faster than the 1M token limit suggests — and 7 fixes that actually work in 2026. Covers .claudeignore patterns, lean CLAUDE.md design, compaction, subagents, and session resume.
Learn how to build custom slash commands in Claude Code using the Skills system. Covers SKILL.md structure, command vs skill patterns, scope, progressive disclosure, and practical examples you can copy today.
Learn how to use Claude Code subagents effectively — when to delegate, how to write AGENTS.md entries, parallel vs sequential patterns, and the key mistake that wastes your context window.
Learn how to use Claude Code hooks to automate formatting, block dangerous commands, inject context, and enforce team rules. Includes 10 copy-paste-ready examples covering all major hook events.
Learn how to configure Claude Code for monorepos using nested CLAUDE.md files, package-specific subagents, token budget strategies, and team-friendly patterns. Includes a real-world example with a full-stack TypeScript monorepo.
A curated list of the best Claude Code Skills (custom slash commands) available on GitHub. From design auditing to security research to session management, these skills turn Claude Code into a specialized expert.
A complete guide to Claude Code best practices, combining Anthropic's official documentation with battle-tested patterns from the developer community. Covers CLAUDE.md, hooks, skills, memory, and workflow optimization.
AGENTS.mdとCLAUDE.mdの本当の違いを実例コードで徹底比較。AGENTS.mdはn8nやawesome-goなど60,000+リポが採用するマルチツール標準、CLAUDE.mdはClaude Code専用。移行ガイドと、両方を1リポで動かす二重ファイル構成も解説。
AGENTS.md vs CLAUDE.md — what they really are, where they diverge, and when each one wins. AGENTS.md is the multi-tool standard (60K+ repos including n8n, awesome-go); CLAUDE.md is Claude Code's native config. Includes migration guide and dual-file setup that actually works.
Next.js、Python ML、API、モバイル、DevOps、OSSなど用途別のCLAUDE.mdテンプレートを10個紹介。コピペしてすぐにClaude Codeを最適化できる実践的な設定集。
Ready-to-use CLAUDE.md templates for Next.js, Python ML, REST APIs, React Native, DevOps, open source libraries, monorepos, documentation sites, Chrome extensions, and CLI tools. Copy, paste, customize, ship.
A curated list of the 20 best AI coding rules from real open-source projects. Featuring CLAUDE.md, .cursorrules, and AGENTS.md files from Vercel, LangChain, Deno, Grafana, and more — with analysis of what makes each one effective.
Learn how to write an effective CLAUDE.md file for Claude Code. This guide covers structure, best practices, real examples from popular open-source projects, and tips for getting the most out of AI-assisted development.
Cursor Rules vs CLAUDE.md vs AGENTS.md — a complete 2026 comparison with real-world data. Which format works with which tool, how to migrate between them, and the hybrid setup most teams actually ship today.
Browse our curated collection of CLAUDE.md, .cursorrules, AGENTS.md, and image prompts.