“Cheap” Claude API via third-party proxies: cheap, but what are you really paying with?
Groups often advertise Claude keys/endpoints at 50–80% off. Before plugging one into a project, understand the data, model-quality and terms risks.
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Message Batches API: cut Claude costs by 50% for work that can wait
Classify 10,000 tickets, summarize a document archive, run evals… submit once as a batch, collect later, pay half.
Pro/Max plan or pay-as-you-go API? Picking the right way to pay for Claude
Same models, two completely different billing models. Pick wrong and you either overpay or hit limits right when you need them.
Model routing for subagents: let Haiku do the chores, Opus the hard parts
Every Claude Code subagent can run its own model. Configure it well and you save tokens without losing quality.
Agent Teams in Claude Code: several Claude sessions working like a real team
One lead coordinates, teammates have their own context, share a task list and message each other directly. Experimental, powerful, token-hungry.
Protecting API keys in AI apps: 7 mistakes that blow up your bill overnight
Keys leaked on GitHub or in client-side JavaScript get scraped and abused within minutes. A short checklist to avoid being the victim.
Make Claude return schema-valid JSON: use tool use instead of “please return JSON”
“Only return JSON” prompts still leak prose sometimes. Define a schema as a tool and force the call — clean, parseable data.
Installing MCP servers and skills for fun? Understand prompt injection first
Agents read web pages, emails, GitHub issues… and any of that text can carry hidden instructions. Simple defensive rules for Claude Code users.
Claude Code Hooks: auto-format, block dangerous commands, enforce tests — no reminders needed
CLAUDE.md is advice; hooks are law. Scripts run at fixed points in the agent loop, so the result is guaranteed.
Running Claude Code headless (claude -p): agents in scripts, cron and CI
Not just a terminal chat — headless mode turns Claude Code into a CLI command you can drop into automated pipelines.
OpenClaw: a self-hosted AI assistant you message on Telegram/WhatsApp that does real work on your machine
One of the fastest-growing open-source personal-agent projects (formerly Clawdbot, Moltbot). Powerful, but it needs a safe setup.
OpenSpec: write the spec first, let AI code after — lightweight spec-driven development
Each change is a folder with proposal, specs, design and tasks. The agent follows the tasks, then you archive and update the main spec.
DESIGN.md: put your design taste in the repo so AI-built UIs stop looking generic
awesome-design-md and getdesign.md collect 550+ DESIGN.md files analyzed from well-known sites — colors, fonts, spacing, components.
Blender MCP: drive Blender with natural language — a textbook MCP-for-desktop-apps example
An addon opens a socket inside Blender; an MCP server relays Claude's commands: create objects, edit materials, pull Poly Haven assets, run Python.
Stanford CS146S “The Modern Software Developer”: a course on building software with AI
A course on how AI is changing the whole software lifecycle — IDEs, terminals, review, testing — and when AI can be trusted.
The official GitHub MCP Server: let agents read issues, PRs, Actions — and scope permissions properly
GitHub's own MCP server, available remote or via Docker. Toolsets and read-only mode keep context small and access safe.
Playwright MCP: let agents use a browser via accessibility snapshots instead of screenshots
Microsoft's MCP server lets Claude open pages, click, fill forms and test UIs — using page structure, no vision model required.
Context7: stop AI from coding against outdated APIs
Add “use context7” to a prompt and the agent pulls version-specific docs for your libraries instead of guessing from training data.
Claude Code GitHub Action: type @claude in a PR to review, fix bugs, answer questions
Anthropic's official action runs on your own runner: automated PR review, issue triage, docs sync, scheduled maintenance.
Claude Agent SDK (Python): build your own agent on Claude Code's engine
The same agent loop, tools, permissions and hooks as Claude Code — called from your code, with custom tools written in Python.
Self-host n8n in 10 minutes: the foundation for every AI automation workflow
Run n8n with Docker on a laptop or VPS, persist data, add HTTPS — and what to do before running it for real.
The n8n AI Agent node with Claude: model + memory + tools in one drag-and-drop block
Combine the Anthropic Chat Model, conversation memory and tools (HTTP, Google Sheets, databases) into an agent that runs inside a workflow.
An AI content pipeline with human approval: Claude drafts, you click “Approve” in Slack, then it posts
Automate 90% of content drafting for a page or blog and keep the most important 10% for humans: deciding whether it goes out.
Automation first, AI second: use LLMs only where judgment is needed
A common mistake: putting an LLM in every step. Good workflows use code/if-else for the certain parts and AI for the fuzzy parts.
Workflow or agent? 5 patterns from Anthropic for picking the right architecture
Prompt chaining, routing, parallelization, orchestrator-workers, evaluator-optimizer — and when you actually need an autonomous agent.
Build an internal AI assistant that answers company process questions (Slack/Telegram + RAG)
“How do I request leave?”, “What's the prod deploy process?” — a bot that answers from internal docs, cites sources, doesn't make things up.
ESP32 + MQTT + Home Assistant: DIY smart home, then let AI control it by voice
A few-dollar microcontroller reads sensors, publishes over MQTT, Home Assistant automates — plus an AI assistant you talk to in plain language.
AI triage for email and tickets: route to the right person in seconds
The most common AI automation pattern: read → classify → extract → route, with a confidence threshold so humans handle the hard cases.
An automated AI morning digest: gather RSS, GitHub, Jira and summarize into one message
Instead of opening 10 tabs every morning, let a workflow collect sources, dedupe, rank and send a summary to Slack/Telegram/email.
What should you automate first? An AI automation prioritization formula for PMs
Not everything AI can do is worth automating. Score by frequency, time, cost of errors and data readiness.
What are Agent Skills? Understand SKILL.md before installing dozens of them
A skill is a folder with a SKILL.md that teaches an agent one specific job. It’s an open standard used by Claude Code, Codex, Gemini CLI, Cursor and more.
Claude Code now reads AGENTS.md: one instruction file for every AI coding tool
Since 2.1.277, if a folder has no CLAUDE.md, Claude Code uses AGENTS.md — the open format already used by Codex, Cursor and others.
What is MCP? The “USB-C port” connecting AI to databases, GitHub, Slack…
The Model Context Protocol is a common standard for AI apps to reach external tools and data. Build a server once; every MCP-capable client can use it.
Inside Claude Code: an AI agent is really a loop around a model
Claude Code, Cursor and Devin share the same “harness”: think → call a tool → observe → repeat. Understanding the loop makes you better at using agents.
A forgotten /loop and a four-figure API bill: what repeated agent runs really cost
Every iteration resends the whole context. If iterations are spaced longer than the prompt cache lives, each one pays full price.
RTK: compress terminal output before it reaches Claude Code to save tokens
A Rust binary that hooks into Claude Code and trims output from git, npm, pytest, docker… cutting most of the tokens from bash output.
Caveman: make Claude talk like a caveman to cut output tokens
A community skill that strips greetings, articles and filler from Claude’s replies while leaving code unchanged. It saves output tokens, but isn’t for every situation.
Graphify: turn a codebase into a knowledge graph so Claude stops re-reading files
Code parsed via AST, docs via Claude, saved as a queryable graph. The bigger the repo, the more tokens each question saves.
Superpowers: a skill set that makes Claude Code plan and test before coding
Instead of “build me an app”, Superpowers walks the agent through brainstorm → plan → batched execution → TDD → verification before saying done.
AutoHarness: let Claude Code turn each session’s lessons into skills
An open-source plugin that captures reusable approaches from your sessions as skills — then updates, merges and prunes them over time.
The Ralph Wiggum loop: run an agent over and over until the tests go green
A “dumb but effective” technique: keep the agent running on the same prompt and stop only when a check that can’t lie says it passed.
Hallmark: a design skill so AI-built sites stop looking AI-built
Purple gradients, identical rounded cards, generic copy — Hallmark uses page structures, themes and a 65-point “slop test” to block those tells.
claude-howto: a free 10-step Claude Code learning path (with a Vietnamese edition)
Installed Claude Code — now what? This open-source repo goes from slash commands to plugins, with diagrams, templates and self-check quizzes.
xtool: build, sign and install iOS apps on Linux or Windows — no Mac needed
An open-source Xcode alternative for turning SwiftPM packages into iOS apps, running on Linux, WSL, Windows and macOS.
tv-vibehack: have Claude strip ads and bloat from Android TV over ADB
It started with fixing a parent’s TV: a prompt and a minimal launcher let AI disable ads, telemetry and preinstalled apps — plus a list of gotchas.
HyperFrames: write video in HTML and let AI agents render the MP4
HeyGen’s open-source framework: compose with HTML/CSS, render with headless Chrome + FFmpeg, plus 21 skills so agents can produce demo and launch videos.
Remotion Agent Skills: get Claude Code to build React videos the right way
Remotion’s official skill set guides agents through compositions, captions, maps and rendering using best practices instead of guessing the API.
Motion graphics with Claude: sort the repos before you install them
“20 motion graphics repos” lists are easy to misread: some are skills, some are video engines, some are just web animation libraries.
“AI can clone any app without source code”? A reality check on REA
REA helps AI agents investigate how binaries, APKs and web apps behave. It’s real and useful — but the clickbait overstates it and skips the legal and safety risks.
612 failed logins in an hour: reading Event ID 4625 to tell an attack from… an old laptop
Red logs don’t always mean an attack. How SOC analysts triage Windows logon failures: which fields matter, when it’s brute force, when it’s a stale password.
Cloudflare open-sources a Security Audit Skill for AI-written code
Vibe coding is fast but leaky. Cloudflare’s new skill scans your codebase and verifies whether each vulnerability is real before you ship.
Bloom filters: why “no” is certain but “yes” only means “maybe”
A tiny bit array in RAM lets RocksDB and Cassandra skip countless pointless disk reads — at the cost of the occasional false alarm.
Saved, but still seeing old data? Replication lag and read-your-writes
Nothing was lost — you’re just reading from a replica that hasn’t caught up yet. The cleanest fix: read-your-writes.
The new Claude Code Desktop: smoother parallel multitasking
A session sidebar, the /btw command, automatic sub-tasks and saved Environments — four changes that make multi-threaded work easier.
Why is the first request always slower? The TCP handshake costs a full RTT
First request 160ms, next ones just 80ms — even with an instant server. The culprit is the SYN / SYN-ACK / ACK greeting.
Captist: a screen recorder that auto-zooms with your cursor — no keyframes
Ship demo videos, tutorials and progress updates faster: auto-zoom, sticky redaction, keystroke overlays and local processing.
Type 5 keys, send 1 request: how a 300ms debounce works
A search box that calls the API on every keystroke floods the server with half-typed queries. Debounce waits until you’re done.
Ambient light for YouTube: free Ambilight-style glow right in your browser
An open-source extension that uses WebGL to cast a glow around YouTube videos — no LED strips required.
State-driven animated avatars: a better waiting experience for AI chatbots
Swap the boring loading spinner for a character that changes motion with the agent’s Idle, Working and Sleeping states.
Liquid Glass for the web: real refraction with WebGL
CSS backdrop-filter only gives a flat blur. Liquid Glass libraries use WebGL to compute refraction for a convincing glass look.
Make iPhone Duo mockups in the browser — no Photoshop needed
Days after launch, the community already has dual-screen mockup tools: upload your UI, export high-quality images.
Page Mascot: add a cursor-following character to your website
An interactive mascot library that makes static pages feel alive: characters track the cursor, react to clicks, and AI agents can draw custom ones.
Morphicons: smoothly morph one icon into another — no animation code
Turn a Menu button into an X with a shape morph instead of a rotate or fade. Works with Lucide, Tabler and Heroicons, with zero heavy dependencies.
Retry storms: why exponential backoff isn’t enough without jitter
12 clients retrying at once knock over a 6-slot server. Backoff decides how long to wait; jitter decides whether the server survives.
Write-Ahead Log: the database said “saved”, then the power died — is the data safe?
All 6 writes were acked but only 3 reached the table — and after a power cut nothing is lost, because the log is written first and the table later.
Circuit breakers: fail fast instead of waiting on a dead service
The service is down, yet every call still waits 1000ms for an error. A circuit breaker counts failures, trips, and fails fast.
setTimeout(fn, 0) runs 50ms later? The event loop explains why
“0ms” doesn’t promise to run now — only to queue early. Microtasks always go before macrotasks.
Backpressure: when the producer is 3× faster, how does the queue not overflow?
The producer pushes 3 msg/s, the consumer handles 1. Without backpressure the queue grows until it runs out of memory. With it, the consumer sets the pace.
How do video sites serve huge audiences? CDN plus peer-to-peer over WebRTC
The CDN sends only a few original copies; viewers’ players pass the rest to each other — and fall back to the CDN the moment a peer leaves.
Connection pools: 45ms to open a connection vs. 0.2ms to borrow one
The query takes 12ms but the API is still slow? Connection setup is often the culprit. A pool removes that cost — until load exceeds it and requests queue.
From 250ms to 0ms: how requests short-circuit through 4 cache layers
Browser, CDN, Redis, database — stacked. A request pays only down to the layer that answers, and every miss teaches the stack.
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