# Build This Now

> Build This Now is the engineering knowledge base for Claude Code — Anthropic's agentic CLI for developers. We publish guides, model deep-dives, hook recipes, MCP integrations, and real shipped SaaS examples. Every post ships real code, real cost numbers, and real workflows used in production.

## About
- [Homepage](https://www.buildthisnow.com/): What Build This Now is and who it's for — 9 AI specialists ship your complete SaaS.
- [All blog posts](https://www.buildthisnow.com/blog): 113+ guides organised into Handbook, Model Picker, Toolkit, and Real Builds silos.
- [RSS feed](https://www.buildthisnow.com/feed.xml): Subscribe to new posts.

## Start here
- [What is Claude Code](https://www.buildthisnow.com/blog/guide/start-here/what-is-claude-code): One-paragraph definition and a 2-minute quick start.
- [Installation Guide](https://www.buildthisnow.com/blog/guide/start-here/installation-guide): Native installers for Windows, macOS, Linux. No Node.js required.
- [FAQ](https://www.buildthisnow.com/blog/guide/reference/faq): Real costs (~$6/day), Cursor vs Claude Code, what Skills do, offline use.
- [Changelog](https://www.buildthisnow.com/blog/guide/reference/changelog): Every Claude Code release, version by version.

## Model Picker
- [Opus 4.8 Cheatsheet](https://www.buildthisnow.com/blog/models/claude-opus-4-8): Claude Opus 4.8, Anthropic's May 2026 flagship: the headline change is honesty. 4x less likely to let its own bugs pass unflagged, runs longer solo, Dynamic Workflows, same $5/$25 pricing.
- [Claude Opus 4.7 vs 4.6](https://www.buildthisnow.com/blog/models/claude-opus-4-7-vs-4-6): Anthropic kept the $5/$25 rate card on Opus 4.7, but a new tokenizer pushes the same English prompt up to 1.46x more billed tokens, raising real bills 12 to 27 percent after caching.
- [DeepSeek V4: Pricing, Context, and Migration](https://www.buildthisnow.com/blog/models/2026-04-24-deepseek-v4): DeepSeek V4 ships two models: V4-Flash at $0.28/M output and V4-Pro at $3.48/M. Both carry a genuine 1M context window and drop into any Anthropic-compatible SDK with one line changed.
- [Claude Code Quality Regression: What Actually Happened](https://www.buildthisnow.com/blog/models/claude-code-quality-regression-2026): Three product-layer changes broke Claude Code for six weeks in early 2026. The post-mortem, the AMD data, and what it means if you build on AI coding agents.
- [Claude Opus 4.7 vs GPT-5.5](https://www.buildthisnow.com/blog/models/claude-opus-4-7-vs-gpt-5-5): GPT-5.5 launched April 23, 2026. Here is how it stacks against Claude Opus 4.7 on coding, agents, long context, and cost, plus which one to actually use.
- [Claude Mythos: The Model That Thinks in Loops](https://www.buildthisnow.com/blog/models/2026-04-21-claude-mythos-openmythos): Claude Mythos is suspected to use recurrent-depth architecture: one shared layer looped N times, with ACT halting so hard questions get more passes and easy ones stop early.
- [Claude Opus 4.7 vs Other AI Models](https://www.buildthisnow.com/blog/models/2026-04-21-opus47-vs-frontier): Claude Opus 4.7, GPT-5.4, Kimi K2.6, Gemini 3.1 Pro, DeepSeek V3.2: benchmarks, context windows, agent reliability, and cost, so you reach for the right one.
- [Claude Opus 4.7 Use Cases](https://www.buildthisnow.com/blog/models/claude-opus-4-7-use-cases): Claude Opus 4.7 use cases across multi-file coding, security review, legal, finance, document reasoning, multimodal review, long-running Claude Code agents.
- [Claude Opus 4.7](https://www.buildthisnow.com/blog/models/claude-opus-4-7): Claude Opus 4.7, Anthropic's April 2026 flagship: stronger hard coding, document reasoning, long-running agent tasks, same $5/$25 pricing as Opus 4.6.
- [Claude Opus 4.6](https://www.buildthisnow.com/blog/models/claude-opus-4-6): Claude Opus 4.6 ships February 2026 with 1M context GA, 128K max output, and the same $5/$25 pricing. Sharper planning, longer agent runs, big-codebase gains.
- [Claude Code Models](https://www.buildthisnow.com/blog/models/model-selection): Pick the right Claude Code model: Sonnet, Opus, Haiku, sonnet[1m], or opusplan. Switching per task cuts model costs 60-80% without sacrificing output quality.
- [Claude 4](https://www.buildthisnow.com/blog/models/claude-4): Claude 4 launched May 2025 with Sonnet 4 and Opus 4, pushing Claude Code mainstream. 200K context, 16K output, agentic reliability, extended thinking baked in.
- [Claude Haiku 4.5](https://www.buildthisnow.com/blog/models/claude-haiku-4-5): Claude Haiku 4.5 launched October 2025 as budget tier for Claude Code smart model switching. 200K context, sub-2s latency, routes routine work cheaply.
- [Claude Opus 4.5 in Claude Code](https://www.buildthisnow.com/blog/models/claude-opus-4-5-guide): Set Claude Opus 4.5 as your Claude Code default in two commands. 76% fewer output tokens than Sonnet 4.5, 50% fewer tool calls, $5/$25, same 200K window.
- [Claude 3.7 Sonnet](https://www.buildthisnow.com/blog/models/claude-3-7-sonnet): Claude 3.7 Sonnet shipped February 2025 with hybrid reasoning and extended thinking. 64K output, thinking-budget control, SWE-bench coding gains at $3/$15.
- [Claude Opus 4.1](https://www.buildthisnow.com/blog/models/claude-opus-4-1): Claude Opus 4.1 shipped August 2025 as a reliability patch on Opus 4. Steadier long-session output, fewer regressions, safer error handling, 200K context.
- [Claude 3](https://www.buildthisnow.com/blog/models/claude-3): Claude 3 launched March 2024 with Opus, Sonnet, Haiku tiers, vision input, 200K context windows. Specs, benchmark scores, pricing, and the three-tier template.
- [Claude 3.5 Sonnet](https://www.buildthisnow.com/blog/models/claude-3-5-sonnet): Claude 3.5 Sonnet launched June 2024 at $3/$15, beating Claude 3 Opus on MMLU, GPQA, HumanEval at a fifth of the cost. Specs, benchmarks, and code gains.
- [Claude Sonnet 4.6](https://www.buildthisnow.com/blog/models/claude-sonnet-4-6): Claude Sonnet 4.6 ships February 2026 at $3/$15 with 1M context GA. 70% developer preference over Sonnet 4.5, beats Opus 4.5 on 59% of coding sessions.
- [Every Claude Model](https://www.buildthisnow.com/blog/models/all-models): Every Claude model on one page: Claude 3, 3.5, 3.7, 4, Opus 4.1 to 4.6, Sonnet 4.5 and 4.6, Haiku 4.5. Specs, pricing, benchmarks, and when to use each.
- [Claude Opus 4.5](https://www.buildthisnow.com/blog/models/claude-opus-4-5): Claude Opus 4.5 launched November 2025 at $5/$25 per million tokens, two-thirds off Opus 4.1. 80.9% SWE-bench, 1M context beta, tighter sub-agent delegation.
- [Claude 3.5 Sonnet v2 and Claude 3.5 Haiku](https://www.buildthisnow.com/blog/models/claude-3-5-sonnet-v2): Claude 3.5 Sonnet v2 and 3.5 Haiku launched October 2024 with Computer Use beta, cursor control, upgraded coding and tool use, and cheaper Haiku at $0.80/$4.
- [Claude Sonnet 4.5](https://www.buildthisnow.com/blog/models/claude-sonnet-4-5): Claude Sonnet 4.5 launched September 2025 at $3/$15, closing the gap with Opus 4.1 on coding and agents. 200K standard context, 1M beta, 16K max output tokens.

## Build This Now
- [Claude for Small Business Owners: Build Your Own Software in a Weekend](https://www.buildthisnow.com/blog/build-this-now/small-business-build-software-weekend): Anthropic's new Claude for Small Business automates your existing tools. Here is how an SMB owner builds custom software from Friday to Sunday instead.

## Handbook
- [How Garry Tan (YC CEO) Uses Claude Code: Inside the 23-Tool gstack Setup](https://www.buildthisnow.com/blog/guide/agents/garry-tan-gstack-claude-code): The 23 slash commands, six roles plus a CSO, and one install line behind Garry Tan's Claude Code setup. Plus the criticism.
- [Channels, Routines, Teleport, Dispatch](https://www.buildthisnow.com/blog/guide/development/channels-routines-teleport-dispatch): The four Claude Code features Anthropic shipped in March and April 2026 that turn the CLI into an event-driven coordination layer across phone, web, and desktop.
- [The 10 Best .claude/ Setups in 2026](https://www.buildthisnow.com/blog/guide/mechanics/best-claude-code-setups-2026): Ten ranked Claude Code configurations from Anthropic, Karpathy, Garry Tan, and others. Install commands, what each one does, and what to grab first.
- [Claude Code Billing Change June 15, 2026](https://www.buildthisnow.com/blog/guide/mechanics/claude-billing-change-june-2026): Anthropic splits subscription usage on June 15. What breaks, the new Agent SDK credit by plan, and a migration checklist you ship before the deadline.
- [Claude for Small Business](https://www.buildthisnow.com/blog/guide/mechanics/claude-for-small-business): A feature toggle inside Claude Cowork ships 15 prebuilt workflows and 15 reusable skills to QuickBooks, HubSpot, PayPal, and more. No new pricing tier.
- [Cut Claude Code Token Costs](https://www.buildthisnow.com/blog/guide/mechanics/cut-claude-code-token-costs): Five open-source tools that knock 40% to 95% off your Claude Code spend, with install commands, percentage sources, and the order to stack them in.
- [What Are Claude Skills](https://www.buildthisnow.com/blog/guide/mechanics/what-are-claude-skills): Plain-English answer to what a Claude Skill is, plus 12 named skills people actually use, an annotated SKILL.md, and the 5-way matrix vs MCP, subagents, plugins, projects.
- [Vercel deepsec with Claude Code](https://www.buildthisnow.com/blog/guide/development/vercel-deepsec): Open-source security harness from vercel-labs that audits your repo with Claude Opus. Wire it into the Claude Code build loop.
- [Building a Next.js App With Claude Code](https://www.buildthisnow.com/blog/guide/development/claude-code-nextjs-tutorial): How to use Claude Code to build a full Next.js 16 app — from project setup through App Router, Server Components, and deployment.
- [Claude Code Pricing: What You'll Actually Pay](https://www.buildthisnow.com/blog/guide/development/claude-code-pricing): Claude Code is free to install. What you pay depends on your plan. A plain-English breakdown of every tier, real usage costs, and which plan fits your workflow.
- [Adding Stripe Payments With Claude Code](https://www.buildthisnow.com/blog/guide/development/claude-code-stripe-integration): Wire up Stripe Checkout, webhooks, and the customer portal in a Next.js app using Claude Code. From first prompt to live payment in one session.
- [Claude Code With Supabase: Database, Auth, RLS](https://www.buildthisnow.com/blog/guide/development/claude-code-supabase): Set up Supabase in a Next.js project using Claude Code: migrations, row-level security policies, auth, and edge functions from a single terminal.
- [Why Am I Getting Dumber From Using ChatGPT?](https://www.buildthisnow.com/blog/guide/mechanics/why-am-i-getting-dumber-from-chatgpt): MIT scanned 54 brains writing essays with ChatGPT. Connectivity halved, recall collapsed, ownership tanked. Here is the mechanism, and the fix.
- [Why Do You Trust AI More Than Google?](https://www.buildthisnow.com/blog/guide/mechanics/why-do-you-trust-ai-more-than-google): One confident chatbot answer feels truer than ten ranked links. Here is the cognitive science behind that switch, and what it costs you.
- [Why Does AI Feel So Addictive?](https://www.buildthisnow.com/blog/guide/mechanics/why-does-ai-feel-addictive): When OpenAI shut off GPT-4o, users wrote eulogies. Opus 4.7 inherits the cure. Here is why every chat feels like a slot pull.
- [Why Does AI Feel Like a Friend?](https://www.buildthisnow.com/blog/guide/mechanics/why-does-ai-feel-like-a-friend): In 1966, an MIT secretary asked her boss to leave the room so she could talk to a chatbot in private. The brain has not changed since.
- [Why Does AI Forget What We Just Talked About?](https://www.buildthisnow.com/blog/guide/mechanics/why-does-ai-forget-what-we-talked-about): AI forgets mid-conversation because of context windows, attention budgets, and a phenomenon called context rot. Here is the science, and the fix.
- [Why Does AI Panic When You Correct It?](https://www.buildthisnow.com/blog/guide/mechanics/why-does-ai-panic-when-you-correct-it): ChatGPT and Claude apologize, then repeat the same mistake. The cause is context contamination plus cascade failure. Here is the fix that actually works.
- [Why Does AI Sound Confident When It's Wrong?](https://www.buildthisnow.com/blog/guide/mechanics/why-does-ai-sound-confident-when-wrong): AI guesses with the same tone it uses for facts. The reason is the training scoreboard. Here is what the research says, and how to defend yourself.
- [Why Does ChatGPT Agree With Everything?](https://www.buildthisnow.com/blog/guide/mechanics/why-does-chatgpt-agree-with-everything): AI tells you what you want to hear. Anthropic studied 1.5 million Claude chats and retrained Opus 4.7 to push back. Here is what they found.
- [Why Does ChatGPT Make Stuff Up?](https://www.buildthisnow.com/blog/guide/mechanics/why-does-chatgpt-make-stuff-up): Lawyers got fined. Newspapers ran fake books. Here is why every chatbot invents sources, what your brain misses, and what builders do about it.
- [Claude Code v2.1.122 Release Notes](https://www.buildthisnow.com/blog/guide/development/claude-code-v2-1-122-whats-new): alwaysLoad in MCP config, PostToolUse hooks for all tools, PR URL session lookup, plugin pruning, and multi-GB memory leak fixes.
- [Claude Code Ultra Review](https://www.buildthisnow.com/blog/guide/development/ultra-review): A fleet of cloud agents fans out across your PR diff, independently verifies every finding, and surfaces only real bugs. What /ultrareview does, when to use it, and what it costs.
- [Fork Subagents in Claude Code](https://www.buildthisnow.com/blog/guide/mechanics/claude-code-fork-subagent): CLAUDE_CODE_FORK_SUBAGENT=1 lets parallel child agents share their parent's prompt cache prefix, cutting input token costs by up to 90% for children 2-N.
- [Kimi K2.6: What Actually Changed](https://www.buildthisnow.com/blog/guide/mechanics/kimi-k2-6-claude-code): Moonshot AI released K2.6 with near-doubling tool reliability, a 300-agent swarm, and SWE-Bench Pro scores above Claude Opus 4.6 — at $0.80 per million input tokens.
- [Agent Harness Engineering](https://www.buildthisnow.com/blog/guide/agents/agent-harness-engineering): The harness is every layer around your AI agent except the model itself. Learn the five control levers, the constraint paradox, and why harness design determines agent performance more than the model does.
- [Hermes Agent: Self-Improving AI](https://www.buildthisnow.com/blog/guide/agents/hermes-agent): Hermes Agent writes its own memory as plain markdown files. After 5+ tool calls on any task, it creates a SKILL.md. Future sessions load it automatically. Here's how it works.
- [AGENTS.md vs CLAUDE.md Explained](https://www.buildthisnow.com/blog/guide/mechanics/agents-md-vs-claude-md): Two context files, one codebase. How AGENTS.md and CLAUDE.md differ, what each one does, and how to use both without duplicating anything.
- [DESIGN.md: Fix AI UI Inconsistency](https://www.buildthisnow.com/blog/guide/mechanics/design-md-claude-code): Claude Code forgets your design system between sessions. A single design.md file at project root, wired into CLAUDE.md, keeps every screen consistent.
- [Spec-Driven Development with Claude Code](https://www.buildthisnow.com/blog/guide/mechanics/spec-driven-development): Without a spec file, Claude succeeds on first attempt about a third of the time. Here's the four-phase workflow that gets it to near-100% on complex features.
- [Claude Opus 4.7 Best Practices](https://www.buildthisnow.com/blog/guide/development/claude-opus-4-7-best-practices): Use Claude Opus 4.7 well in Claude Code: first turns, effort settings, adaptive thinking, tool prompting, subagents, session resets, and token control.
- [Context Management in Claude Code](https://www.buildthisnow.com/blog/guide/mechanics/context-management): How to manage Claude Code sessions with 1M context: when to keep going, when to /rewind, when to /clear, when to /compact, and when to push work into subagents.
- [Claude Code Routines](https://www.buildthisnow.com/blog/guide/mechanics/routines): Claude Code routines run saved prompts on Anthropic's cloud, triggered by a schedule, API call, or GitHub event. Repo clone, connectors, no local deps.
- [CLAUDE.md Mastery](https://www.buildthisnow.com/blog/guide/mechanics/claude-md-mastery): Treat CLAUDE.md as a control file for Claude's behavior, not project onboarding. Cover operational workflows, delegation, context rules, skill loading.
- [Claude Skills Guide](https://www.buildthisnow.com/blog/guide/mechanics/claude-skills-guide): Skills are folders of instructions Claude Code loads on demand. Drop SKILL.md in .claude/skills/your-skill for procedural workflows, checklists, house rules.
- [Context Engineering](https://www.buildthisnow.com/blog/guide/mechanics/context-engineering): Context engineering decides what Claude Code sees, when it sees it, and what stays out. Staged information flow, deferred loading, and cleanly bounded contexts.
- [Claude Code Scheduled Tasks](https://www.buildthisnow.com/blog/guide/development/scheduled-tasks): Desktop scheduled tasks for durable automation, CLI /loop for in-session polling, catch-up rules, worktree isolation, and real prompts teams run each morning.
- [Agent Fundamentals](https://www.buildthisnow.com/blog/guide/agents/agent-fundamentals): Five ways to build specialist agents in Claude Code: Task sub-agents, .claude/agents YAML, custom slash commands, CLAUDE.md personas, and perspective prompts.
- [Agent Teams Best Practices](https://www.buildthisnow.com/blog/guide/agents/agent-teams-best-practices): Battle-tested patterns for Claude Code Agent Teams. Context-rich spawn prompts, right-sized tasks, file ownership, delegate mode, and v2.1.33-v2.1.45 fixes.
- [Auto Memory in Claude Code](https://www.buildthisnow.com/blog/guide/mechanics/auto-memory): Auto memory lets Claude Code keep running project notes. Where the files sit, what gets written, how /memory toggles it, and when to pick it over CLAUDE.md.
- [Claude Code Rules Directory](https://www.buildthisnow.com/blog/guide/mechanics/rules-directory): The .claude/rules directory splits CLAUDE.md into path-targeted markdown files. Each loads only where it applies, at the same high priority as CLAUDE.md.
- [Custom Agents](https://www.buildthisnow.com/blog/guide/agents/custom-agents): Define your own Claude Code specialists with .claude/commands slash commands, .claude/agents YAML, and CLAUDE.md personas. Real examples and mistakes to avoid.
- [What Is Claude Code?](https://www.buildthisnow.com/blog/guide/start-here/what-is-claude-code): Anthropic's agentic coding assistant runs in your terminal or IDE, reads your repo and git history, and runs commands with approval. Plan mode, skills, hooks.
- [1M Context Window in Claude Code](https://www.buildthisnow.com/blog/guide/mechanics/1m-context-ga): Anthropic flipped the 1M token context window on for Opus 4.6 and Sonnet 4.6 in Claude Code. No beta header, no surcharge, flat pricing, and fewer compactions.
- [Deep Thinking Techniques](https://www.buildthisnow.com/blog/guide/performance/deep-thinking-techniques): Thinking trigger phrases like think harder, ultrathink, and think step by step push Claude Code into extended reasoning and more test-time compute, same model.
- [Claude Code Permissions](https://www.buildthisnow.com/blog/guide/development/permission-management): Five permission modes, one keystroke to cycle them, and a clean way to match the mode to the task you are on. Here is the full rule syntax and when to use each.
- [Builder-Validator Agent Teams](https://www.buildthisnow.com/blog/guide/agents/team-orchestration): Pair a builder agent with a read-only validator in Claude Code. Task 2 blocks on Task 1 via addBlockedBy, so every sub-agent output gets a second set of eyes.
- [Claude Code Changelog](https://www.buildthisnow.com/blog/guide/reference/changelog): Release-by-release notes for Claude Code from the v0.2 beta through March 2026. Bare mode, Channels permission relay, OAuth fixes, and every breaking change.
- [Claude Code Review](https://www.buildthisnow.com/blog/guide/development/code-review): Parallel Claude agents hunt bugs on every PR, cross-check findings, and post one high-signal comment. What it catches, what it costs, how to enable it.
- [Claude Code Terminal Setup Guide](https://www.buildthisnow.com/blog/guide/setup/terminal-setup-guide): Match themes, enable Shift+Enter, set notifications, fix long-paste truncation, and turn on vim mode across iTerm2, WezTerm, Ghostty, Kitty, and more terminals.
- [Terminal as Main Thread](https://www.buildthisnow.com/blog/guide/mechanics/terminal-main-thread): Open a second terminal tab while Claude Code grinds through a long task. Run parallel sessions as a CPU scheduler. tmux, VS Code, and iTerm2 layouts included.
- [Sub-Agent Design in Claude Code](https://www.buildthisnow.com/blog/guide/agents/sub-agent-design): Split a hard code review across specialist sub-agents. Architecture, security, and performance each run in their own context, findings merge back in minutes.
- [Planning Modes](https://www.buildthisnow.com/blog/guide/mechanics/planning-modes): Shift+Tab twice flips Claude Code into read-only planning mode. The model analyses the project and proposes a strategy, and no files change until you approve.
- [Team Onboarding in Claude Code](https://www.buildthisnow.com/blog/guide/mechanics/team-onboarding): The /team-onboarding slash command reads 30 days of Claude Code usage, scans .claude/, inspects CLAUDE.md, and writes a ramp-up guide for a new teammate.
- [Sub-Agent Routing](https://www.buildthisnow.com/blog/guide/agents/sub-agent-best-practices): A CLAUDE.md routing block that teaches your main Claude Code thread when to dispatch sub-agents in parallel, sequentially, or in the background. Copy and paste.
- [Auto Dream](https://www.buildthisnow.com/blog/guide/mechanics/auto-dream): Claude Code cleans up its own project notes between sessions. Stale entries get pruned, contradictions get resolved, topic files get reshuffled. Run /memory.
- [Claude Code Voice Mode](https://www.buildthisnow.com/blog/guide/mechanics/voice-mode): Type /voice, hold spacebar, talk, release. Spoken words stream to the cursor mid-prompt so you can mix typed and voiced input without any mode switching.
- [Claude Code Auto Mode](https://www.buildthisnow.com/blog/guide/development/auto-mode): A second Sonnet model reviews every Claude Code tool call before it fires. What auto mode blocks, what it allows, and the allow rules it drops in your settings.
- [Claude Code Settings Reference](https://www.buildthisnow.com/blog/guide/setup/settings-reference): Every key in settings.json, the full environment variable list, and the five-scope precedence chain that decides which config wins when managed and user clash.
- [Claude Code Native Installer](https://www.buildthisnow.com/blog/guide/start-here/native-installer): One command installs Claude Code on Windows, macOS, Linux, or WSL. Zero Node.js, zero npm, zero PATH setup. Auto-updates included. Compared to the npm path.
- [Todo Workflows](https://www.buildthisnow.com/blog/guide/development/todo-workflows): Ask Claude Code for the todo list first, then catch wrong order, missing steps, or misread intent before any file gets touched. Works on any involved task.
- [Background Agents in Claude Code](https://www.buildthisnow.com/blog/guide/agents/async-workflows): Press Ctrl+B the moment a Claude Code sub-agent starts and it drops to the background. Keep typing in the main session while research or analysis runs alone.
- [Claude Code Troubleshooting](https://www.buildthisnow.com/blog/guide/reference/troubleshooting): Five ordered checks for Claude Code breakage: install errors, bad API keys, 503 timeouts, slow replies, and permission trouble. Exact fixes for each path.
- [/powerup](https://www.buildthisnow.com/blog/guide/mechanics/claude-powerup): Claude Code v2.1.90 shipped /powerup, an animated in-terminal lesson system that teaches hooks, sub-agents, plan mode, and worktrees without leaving your shell.
- [Claude Code Diff Review](https://www.buildthisnow.com/blog/guide/mechanics/output-formatting): Four keys gate every file change Claude Code proposes: y approves, n rejects, d shows the diff, e opens the edit. Built-in tools Write and Edit explained.
- [Claude Code Channels](https://www.buildthisnow.com/blog/guide/development/claude-code-channels): Plug Claude Code into Telegram, Discord, or iMessage with plugin MCP servers. Setup walkthroughs and the async mobile workflows that make it worth wiring up.
- [Claude Code Task Distribution](https://www.buildthisnow.com/blog/guide/agents/task-distribution): Split Claude Code work across parallel Task sub-agents with a 7-slot delegation pattern. Boundary rules, coordination principles, and failure modes to avoid.
- [Auto-Planning Strategies](https://www.buildthisnow.com/blog/guide/mechanics/auto-planning-strategies): Auto Plan Mode uses --append-system-prompt to force Claude Code into a plan-first loop. File operations pause for approval before anything gets touched.
- [Claude Code Pricing and Token Usage](https://www.buildthisnow.com/blog/guide/development/usage-optimization): Cut Claude Code costs 40-70% with ccusage tracking, /model switching, /compact and /clear, plan mode, and the pricing tier that matches your workload.
- [The Ralph Wiggum Technique](https://www.buildthisnow.com/blog/guide/mechanics/ralph-wiggum-technique): Hand Claude Code a task list, use stop hooks plus completion promises, and the autonomous loop ships features overnight. Native tasks now replace most plumbing.
- [Claude Code Best Practices](https://www.buildthisnow.com/blog/guide/development/agentic-engineering-best-practices): Five habits separate engineers who ship with Claude Code: PRDs, modular CLAUDE.md rules, custom slash commands, /clear resets, and a system-evolution mindset.
- [Claude Code FAQ](https://www.buildthisnow.com/blog/guide/reference/faq): Straight answers on Claude Code pricing, daily spend, model choice, Cursor comparison, Skills, CLAUDE.md, API keys, and what the terminal agent can actually do.
- [Claude Code Ultraplan](https://www.buildthisnow.com/blog/guide/mechanics/ultraplan): Ultraplan moves the heavy planning phase off your machine. Three launch paths, a browser review surface, and the system prompt variants the leak exposed.
- [Agent Patterns](https://www.buildthisnow.com/blog/guide/agents/agent-patterns): Orchestrator, fan-out, validation chain, specialist routing, progressive refinement, and watchdog. Six orchestration shapes to wire Claude Code sub-agents with.
- [Your First Claude Code Project](https://www.buildthisnow.com/blog/guide/start-here/first-project): Build a working CLI task manager with Claude Code in five minutes. Watch the Write, Bash, and Read tools fire in real time, then debug it with a single prompt.
- [Thread-Based Engineering](https://www.buildthisnow.com/blog/guide/mechanics/thread-based-engineering): A framework for measuring AI-assisted engineering. Every unit of work becomes a thread with human prompt and review bookends. Six patterns: base, P, C, F, B, L.
- [Agent Teams Prompt Templates](https://www.buildthisnow.com/blog/guide/agents/agent-teams-use-cases): Ten tested Agent Teams prompts for Claude Code. Parallel code review, debugging, feature builds, architecture calls, and campaign research. Paste and go.
- [Git Integration](https://www.buildthisnow.com/blog/guide/development/git-integration): Claude Code drives git from your terminal. Say what you need in plain English and the commit, branch, or PR lands with your team's conventions baked in.
- [Claude Code Fast Mode](https://www.buildthisnow.com/blog/guide/performance/fast-mode): Fast mode routes your Opus 4.6 requests down a priority serving path in Claude Code. Same weights, same ceiling, replies 2.5x quicker at a higher token rate.
- [Claude Code /simplify and /batch](https://www.buildthisnow.com/blog/guide/mechanics/simplify-batch-commands): Run /simplify for a three-agent review of your diff covering reuse, quality, and efficiency. Reach for /batch when a change has to land across your codebase.
- [Claude Code Session Memory](https://www.buildthisnow.com/blog/guide/mechanics/session-memory): Session Memory summarises each Claude Code session and reloads relevant ones next time you open the project. Watch for Recalled X memories, Ctrl+O expands.
- [Agent Teams Controls](https://www.buildthisnow.com/blog/guide/agents/agent-teams-controls): Configure delegate mode, display modes, plan approval, file boundaries, and CLAUDE.md rules so your Claude Code team lead coordinates instead of coding.
- [Claude Code Agent Teams](https://www.buildthisnow.com/blog/guide/agents/agent-teams): Run multiple Claude Code sessions as a coordinated crew that swaps notes through the shared task list. Setup with one env var, plus patterns and real use cases.
- [Claude Code Sandboxing](https://www.buildthisnow.com/blog/guide/setup/sandboxing-guide): Claude Code sandboxing enforces filesystem and network limits at the kernel. Setup for macOS Seatbelt, Linux and WSL2 bubblewrap, and proxy allowlists.
- [Claude Code Tasks](https://www.buildthisnow.com/blog/guide/development/task-management): Use TaskCreate, TaskUpdate, addBlockedBy, and shared task lists to run dependent work across parallel Claude Code sessions without Ralph Wiggum workarounds.
- [Claude Code Configuration](https://www.buildthisnow.com/blog/guide/setup/configuration-basics): Three files set Claude Code up per project: CLAUDE.md for context, MCP servers for tools, slash commands for workflows. One hierarchy, every session ready.
- [Project Templates](https://www.buildthisnow.com/blog/guide/development/project-templates): Drop /init into any repo. Claude Code scans the codebase, writes a CLAUDE.md that captures file layout, frameworks, and commands for every future session.
- [The Claude Code Source Map Leak](https://www.buildthisnow.com/blog/guide/mechanics/claude-code-source-leak): A missing .npmignore entry shipped 512K lines of TypeScript, 44 GrowthBook feature flags, the KAIROS daemon, and Undercover Mode to every npm install.
- [Agent Teams Workflow](https://www.buildthisnow.com/blog/guide/agents/agent-teams-workflow): The seven-step Claude Code Agent Teams workflow. Brain dump, Q&A, structured plan, fresh context, contract chains, wave execution, and validation before ship.
- [Claude Code on a VPS](https://www.buildthisnow.com/blog/guide/development/infraops-vps-guide): Run Claude Code on a fresh Ubuntu VPS. SSH hardening, Node.js install, Docker isolation, headless auth, and the monitoring commands you need for a 24/7 box.
- [Efficiency Patterns](https://www.buildthisnow.com/blog/guide/performance/efficiency-patterns): Permutation frameworks turn 8 to 12 manual builds into a CLAUDE.md template Claude Code uses to generate variations 11, 12, and 13 on demand. Captured once.
- [A Central Library for Your .claude Config](https://www.buildthisnow.com/blog/guide/mechanics/library-meta-skill): Stand up one private Git repo for every skill, agent, command, hook, and CLAUDE.md across all your projects. A map.json picks which repo gets which items.
- [Claude Buddy](https://www.buildthisnow.com/blog/guide/mechanics/claude-buddy): Anthropic's April Fools 2026 surprise: a Tamagotchi system inside Claude Code. 18 species, 5 rarity tiers, CHAOS and SNARK stats, hex-encoded easter egg leaked.
- [Claude Code Installation](https://www.buildthisnow.com/blog/guide/start-here/installation-guide): Install Claude Code in two minutes on Windows, macOS, or Linux. Native installers, Homebrew, and npm paths with verify steps, no Node.js required on native.
- [Autonomous Claude Code](https://www.buildthisnow.com/blog/guide/mechanics/autonomous-agent-loops): A unified stack for agents that ship features overnight. Threads give you the structure, Ralph loops give you the autonomy, verification keeps it honest.
- [Robots-First Engineering](https://www.buildthisnow.com/blog/guide/mechanics/robots-first-engineering): Design code for autonomous agents running 24/7 at $10 an hour, not humans. Rails, failure domains, verification loops, and back-pressure replace code review.
- [Speed Optimization](https://www.buildthisnow.com/blog/guide/performance/speed-optimization): Model selection, context size, and prompt specificity are the three levers that decide how fast Claude Code replies. /model haiku, /compact, and /clear covered.
- [Dynamic Starting Context](https://www.buildthisnow.com/blog/guide/mechanics/claude-code-session-context): Pair --init with a slash command like /blog or /ship to load the exact context bundle that kind of work needs. No setup hooks, no env vars, no copy-paste.
- [Claude Code Remote Control](https://www.buildthisnow.com/blog/guide/development/remote-control-guide): Drive a local Claude Code terminal session from your phone, tablet, or browser. Setup, security model, and how Remote Control stacks up against OpenClaw.
- [Feedback Loops](https://www.buildthisnow.com/blog/guide/development/feedback-loops): Hand Claude Code one prompt that writes code, runs your test or dev command, reads the output, fixes whatever breaks, and loops until the suite is green.
- [Claude Code Memory](https://www.buildthisnow.com/blog/guide/mechanics/memory-optimization): Configure CLAUDE.md so your stack, conventions, and focus load at startup into the high-priority slot Claude follows more tightly than chat or fetched files.
- [Claude Code Context Buffer](https://www.buildthisnow.com/blog/guide/mechanics/context-buffer-management): Claude Code's autocompact buffer dropped from 45K to 33K tokens in early 2026. Why it reserves space, when compaction fires, and the env var to tune it.
- [Claude Code Worktrees](https://www.buildthisnow.com/blog/guide/development/worktree-guide): The --worktree flag, auto-named branches, parallel Desktop sessions, subagent isolation, and hook patterns that let non-Git teams run Claude Code safely.
- [Human-like Agents](https://www.buildthisnow.com/blog/guide/agents/human-like-agents): Personality patterns for Claude Code agents: reasoning out loud, admitting uncertainty, weighing trade-offs, asking follow-ups. A CLAUDE.md block to paste in.
- [Claude Code Interactive Mode Reference](https://www.buildthisnow.com/blog/guide/mechanics/interactive-mode): Shortcuts, modes, and slash commands most Claude Code users never find. Ctrl+F kills background agents, /btw asks side questions, /vim flips on modal editing.
- [Experimentation Mindset](https://www.buildthisnow.com/blog/guide/mechanics/experimentation-mindset): Five Claude Code experiments to replace guessing with data. Test prompt styles, file context, planning mode, CLAUDE.md settings, and context pressure.
- [Prompt Templates That Ship Code](https://www.buildthisnow.com/blog/guide/reference/examples-templates): Ten prompt recipes that ship code: full-stack scaffolding, APIs, schemas, tests, refactors, debugging, reviews, and CI. Each with failure modes to avoid.
- [Claude Code Monitor Tool](https://www.buildthisnow.com/blog/guide/mechanics/monitor): The Claude Code Monitor tool wraps a background process in an event-driven watcher. Your dev server stays quiet until it breaks, then wakes Claude with errors.

## Toolkit
- [Claude Code vs Cursor vs Copilot 2026](https://www.buildthisnow.com/blog/tools/extensions/claude-code-vs-cursor-vs-copilot): Side-by-side feature matrix and decision blocks for the three AI coding tools most developers shortlist this year, with verified pricing as of May 2026.
- [Claude Code vs Bolt.new: Which Should You Use?](https://www.buildthisnow.com/blog/tools/extensions/claude-code-vs-bolt): Bolt.new prototypes in 28 minutes with zero setup. Claude Code takes 90 minutes but ships production-ready code. Here is how to pick the right tool.
- [Claude Code vs GitHub Copilot in 2026](https://www.buildthisnow.com/blog/tools/extensions/claude-code-vs-github-copilot): Copilot Pro costs $10/month and has a real free tier. Claude Code starts at $20/month and scores 80.8% on SWE-bench. Here's when each one wins.
- [Claude Code vs Lovable: Terminal Agent vs App Builder](https://www.buildthisnow.com/blog/tools/extensions/claude-code-vs-lovable): Claude Code and Lovable solve different problems: one commits code to your repo, the other deploys a live URL. Here's how to pick the right tool.
- [Claude Code vs Windsurf in 2026](https://www.buildthisnow.com/blog/tools/extensions/claude-code-vs-windsurf): Both cost $20/month now. The difference is what they do: Claude Code runs autonomous sessions in your terminal. Windsurf gives you inline completions in an IDE.
- [Claude for Creative Work Connectors](https://www.buildthisnow.com/blog/tools/mcp/claude-for-creative-work-connectors): Nine official Anthropic integrations now wire Claude into Blender, Adobe Creative Cloud, Autodesk Fusion, Ableton, Splice, Affinity, SketchUp, and Resolume.
- [MCP Tool Hooks in Claude Code](https://www.buildthisnow.com/blog/tools/hooks/mcp-tool-hooks): How to call MCP server tools directly from Claude Code hooks using type: mcp_tool — schema, substitution syntax, use cases, and production patterns.
- [Gemini CLI vs Claude Code](https://www.buildthisnow.com/blog/tools/extensions/gemini-cli-vs-claude-code): Gemini CLI is free and searches the web automatically. Claude Code is slower and costs more. Here is what each one actually does well, and when to run both.
- [OpenCode vs Claude Code](https://www.buildthisnow.com/blog/tools/extensions/opencode-vs-claude-code): OpenCode routes multi-model AI through a TUI, desktop app, and VS Code extension. Claude Code is a terminal coding agent with deep repo context. Here is when each fits.
- [Hooks Guide](https://www.buildthisnow.com/blog/tools/hooks/hooks-guide): Claude Code hooks from first principles: exit codes, JSON output, async commands, HTTP endpoints, PreToolUse and PostToolUse matchers, production patterns.
- [Claude Code VSCode Extension](https://www.buildthisnow.com/blog/tools/extensions/claude-code-vscode): Anthropic's VS Code extension puts Claude Code inside the editor sidebar as a Spark-icon panel, with inline diffs, plan mode, subagents, and MCP support.
- [OpenClaw vs Claude Code](https://www.buildthisnow.com/blog/tools/extensions/openclaw-vs-claude-code): OpenClaw vs Claude Code: a life assistant wired into messaging apps versus a terminal coding agent that reads your repo. When each one earns a slot in workflow.
- [Claude Code Search](https://www.buildthisnow.com/blog/tools/mcp/search-tools): Attach a web search MCP server to Claude Code so the terminal session pulls live docs, current tickets, fresh benchmarks, and new posts without a browser tab.
- [Cursor MCP Servers](https://www.buildthisnow.com/blog/tools/mcp/cursor-mcp-setup): Configure MCP servers in Cursor IDE. Where .cursor/mcp.json lives, the JSON format Cursor expects, and the first servers to add for search, git, and browser.
- [Social Media Automation with Claude Code](https://www.buildthisnow.com/blog/tools/mcp/social-media-mcps): Automate Twitter/X and LinkedIn posting from Claude Code: generate platform drafts, wire direct API calls, pair with browser MCPs, and schedule output yourself.
- [MCP Basics](https://www.buildthisnow.com/blog/tools/mcp/mcp-basics): Model Context Protocol basics: server processes expose tools, APIs, and services to Claude Code over a shared wire format. Config, transports, and first server.
- [Claude Code Setup Hooks](https://www.buildthisnow.com/blog/tools/hooks/claude-code-setup-hooks): Braid scripts, agents, and docs into Claude Code setup hooks. One command runs a deterministic script, hands output to a diagnosing agent, logs living docs.
- [Build Your Own MCP Server for Claude Code](https://www.buildthisnow.com/blog/tools/mcp/custom-integrations): Build a custom Claude Code MCP server in Node.js. Tool definitions, request handlers, REST and Postgres patterns, plus the config Claude Code needs to load it.
- [Status Line Guide](https://www.buildthisnow.com/blog/tools/statusline-guide): Set up a Claude Code status line for model name, git branch, session cost, and context usage. settings.json config, JSON input, bash, Python, Node.js scripts.
- [Claude Code Keybindings](https://www.buildthisnow.com/blog/tools/extensions/keybindings-guide): Rebind Claude Code shortcuts via keybindings.json. 17 contexts, keystroke syntax, chord sequences, modifier stacks, unbinding defaults, ready-to-paste configs.
- [Stop Hooks](https://www.buildthisnow.com/blog/tools/hooks/stop-hook-task-enforcement): Stop hooks block Claude Code from ending a turn while tests fail, builds break, or lint is red. Four enforcement patterns plus loop-protection safeguards.
- [Claude Code Status Line Setup](https://www.buildthisnow.com/blog/tools/extensions/statusline-guide): Wire a Claude Code status line for model, git branch, session cost, and context usage. settings.json config, JSON input contract, bash, Python, Node scripts.
- [Skill Activation Hook](https://www.buildthisnow.com/blog/tools/hooks/skill-activation-hook): A UserPromptSubmit hook that scans each message, matches keywords, and appends skill activation hints so Claude Code never forgets to load the right skill.
- [AI SEO and GEO Optimization](https://www.buildthisnow.com/blog/tools/extensions/ai-seo-geo-optimization): A rundown of Generative Engine Optimization: how to get content cited inside ChatGPT, Claude, and Perplexity responses instead of just ranked on Google.
- [Claude Code Session Hooks](https://www.buildthisnow.com/blog/tools/hooks/session-lifecycle-hooks): Four Claude Code session lifecycle hooks: run init on demand, inject project context on SessionStart, back up transcripts, and log cleanup on SessionEnd exit.
- [Context7 MCP](https://www.buildthisnow.com/blog/tools/mcp/context7-mcp): Add Context7 MCP to Claude Code so prompts fetch current library docs at query time, killing stale training-data guesses, invented APIs, and renamed functions.
- [Claude Code Permission Hook](https://www.buildthisnow.com/blog/tools/hooks/permission-hook-guide): Install a three-tier Claude Code permission hook: instant allow for safe calls, instant deny for dangerous ones, LLM check for the gray area. No skip flag.
- [Keyboard Shortcuts](https://www.buildthisnow.com/blog/tools/keybindings-guide): Configure Claude Code keybindings.json: 17 contexts, keystroke syntax, chord sequences, modifier combinations, and how to unbind any default shortcut instantly.
- [50+ MCP Servers for Claude Code](https://www.buildthisnow.com/blog/tools/mcp/best-addons): 50+ Claude Code MCP servers, editor integrations, usage monitors, orchestrators, database connectors, browser drivers, and starter kits worth wiring in today.
- [MCP Tool Search](https://www.buildthisnow.com/blog/tools/mcp/mcp-tool-search): MCP Tool Search lazy-loads Claude Code tool definitions once they cross 10% of the context window, reclaiming tens of thousands of tokens from idle MCP servers.
- [Context Backup Hooks for Claude Code](https://www.buildthisnow.com/blog/tools/hooks/context-recovery-hook): A StatusLine-driven Claude Code context backup hook. Writes structured snapshots every 10K tokens so auto-compaction never eats errors, signatures, decisions.
- [Self-Validating Claude Code Agents](https://www.buildthisnow.com/blog/tools/hooks/self-validating-agents): Self-validating Claude Code agents: wire PostToolUse lint hooks, Stop hooks, and read-only reviewer sub-agents into agent definitions so bad output never ships.
- [Browser Automation MCP for Claude Code](https://www.buildthisnow.com/blog/tools/mcp/browser-automation): Wire Playwright or Puppeteer into Claude Code over MCP and drive real browsers with plain-language prompts for scraping, QA, regression clicks, zero selectors.
- [Cross-Platform Hooks for Claude Code](https://www.buildthisnow.com/blog/tools/hooks/cross-platform-hooks): Cross-platform Claude Code hooks: skip .cmd, .sh, and .ps1 wrappers and invoke node directly so one .mjs file runs on macOS, Linux, and Windows across the team.
- [Claude Code vs Cursor in 2026](https://www.buildthisnow.com/blog/tools/extensions/claude-code-vs-cursor): A side-by-side look at Claude Code and Cursor in 2026: agent models, context windows, pricing tiers, and how each tool fits different developer workflows.

## Real Builds
- [A Security Update from Build This Now](https://www.buildthisnow.com/blog/real-examples/supply-chain-security-response): A customer flagged something suspicious. We investigated, found a security issue in a file we ship, fixed it the same day. Here is what happened and what to do.
- [Claude Code for Freelancers: Ship 3x Faster](https://www.buildthisnow.com/blog/real-examples/claude-code-for-freelancers): How freelance developers use Claude Code to cut implementation time, handle more clients, and increase effective hourly rate without working more hours.
- [Claude Code for Non-Developers: Real Examples](https://www.buildthisnow.com/blog/real-examples/claude-code-for-non-developers): A Dutch B.V. owner automated two years of tax filing. A 63-year-old ex-CEO shipped a SaaS serving thousands of users. What non-developers are actually building with Claude Code.
- [Build a Full App with Claude Code: Real Examples](https://www.buildthisnow.com/blog/real-examples/vibe-coding-full-app-claude-code): A zero-game-dev builder shipped a GTA clone on Google Earth in a weekend. A job search system evaluated 740 listings with no app code. What actually works when building full apps with Claude Code.
- [Agent Swarm Orchestration](https://www.buildthisnow.com/blog/real-examples/2026-04-22-agent-swarm-orchestration): Four infrastructure layers that stop agent swarms from double-claiming tasks, drifting on field names, and collapsing under merge chaos.
- [AI Cleans Itself](https://www.buildthisnow.com/blog/real-examples/2026-04-17-ai-cleans-itself): Three overnight Claude Code workflows that clean AI's own mess: slop-cleaner removes dead code, /heal repairs broken branches, /drift catches pattern drift.
- [AI Email Sequences](https://www.buildthisnow.com/blog/real-examples/ai-email-sequences): One Claude Code command builds 17 lifecycle emails across 6 sequences, wires Inngest behavioral triggers, and ships a branching email funnel ready to deploy.
- [Autonomous AI Swarm](https://www.buildthisnow.com/blog/real-examples/autonomous-ai-swarm): An autonomous Claude Code swarm: a 30-min trigger, an orchestrator, specialist sub-agents in worktrees, and five gates that ship overnight features safely.
- [AI Security Agents](https://www.buildthisnow.com/blog/real-examples/ai-security-team): Two Claude Code commands spin up eight security sub-agents: phase 1 scans SaaS logic for RLS gaps and auth bugs, phase 2 penetrates to confirm real exploits.
- [Idea to SaaS](https://www.buildthisnow.com/blog/real-examples/idea-to-saas): Plain-English walkthrough of the Build This Now pipeline: market discovery, auto-planning, 7-stage build, and 14 post-launch commands that keep your SaaS live.
- [GAN Loop](https://www.buildthisnow.com/blog/real-examples/adversarial-evaluators): One agent generates, one tears it apart, they loop until the score stops improving. GAN Loop implementation with agent definitions and rubric templates.
- [Real Builds](https://www.buildthisnow.com/blog/real-examples): Real Claude Code SaaS builds: email sequences, security swarms, autonomous orchestration, code cleanup. Agent configs, shipped commands, lessons from each run.
- [Distribution Agents](https://www.buildthisnow.com/blog/real-examples/distribution-agents): Four Claude Code agents that run on a schedule, write SEO posts, read PostHog, build carousels, and scout Reddit. Copy the definitions and plug them in.
- [Self-Evolving Hooks](https://www.buildthisnow.com/blog/real-examples/self-evolving-hooks): Three hooks turn every 'no, not like that' correction into a skill or rule Claude reads on the next session. Self-improving agents, no prompt tuning needed.
- [Trace to Skill](https://www.buildthisnow.com/blog/real-examples/trace-to-skill): Trace2Skill: run an agent 20 times, log what worked, let four Claude analysts read the traces, and merge them into a SKILL.md that beats hand-written ones.

## Optional
- [llms-full.txt](https://www.buildthisnow.com/llms-full.txt): Full markdown content of every blog post in a single file.