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43 posts · sitepoint.com
The article shows how to protect AI‑generated shell/SQL commands by parsing them with real AST parsers (tree‑sitter for Bash, Babel for JS‑embedded SQL) and enforcing structural allowlists plus command/path whitelists, instead of fragile regex filters.
The article shows how to build a deterministic, checkpoint‑backed finite state machine engine in TypeScript for orchestrating multi‑agent AI workflows. It uses Zod for schema validation, better‑sqlite3 for atomic persistence, and a pure transition function to make workflows traceable and recoverable in serverless environments.
Step‑by‑step tutorial showing how to build a stateless composite Model Context Protocol (MCP) gateway in TypeScript using Hono, Zod, and the MCP SDK. It covers config‑driven upstream registration, namespaced tool discovery, JSON‑RPC routing, per‑tool auth middleware, and a token‑bucket rate limiter, with concrete code snippets and design trade‑offs.
Server‑only code can silently inflate client bundles in Next.js 15+ apps. The article shows how to spot leaks with @next/bundle-analyzer, prevent them by removing shared barrel files or adding the `server-only` guard, and enforce a deny‑list of server modules via a custom ESLint rule that scans the AST of files with a `'use client'` directive. The rule is wired into a CI bundle‑budget check using…
Most API monitoring only checks HTTP status, missing content and workflow errors. The article urges field‑level validation, chained‑call testing, and multi‑region checks to catch silent failures.
The article shows how to replace raw TypeScript compiler output with a programmatic JSON feedback loop that merges diagnostics and Vitest test failures, feeding the structured data back to an LLM coding agent for self‑correction. It provides concrete code for extracting, enriching, validating, and de‑duplicating errors, and demonstrates token savings and deterministic iteration until compilation…
AI-generated code often passes basic CI but contains subtle bugs like vacuous tests or off-by-one errors. This article details a multi-tier CI/CD pipeline using AST analysis, property-based testing, and mutation testing to catch these issues and annotate GitHub PRs with actionable SARIF reports.
This guide details building a distributed sliding-window rate limiter using TypeScript and Redis. It leverages Redis sorted sets and an atomic Lua script to prevent race conditions and over-admission under high concurrency, supporting dual RPM/TPM quotas.
This article details how to diagnose PostgreSQL index bloat, write amplification, and buffer cache inefficiency using SQL tools like pgstattuple and pg_buffercache. It provides a reusable SQL toolbox and a Docker environment to identify and understand performance bottlenecks caused by MVCC-related index fragmentation.
This article details building a Generative UI architecture that streams structured JSON component schemas from LLMs, rendering them directly into type-safe React Server Components. It provides a full, from-scratch implementation using Web Streams, Zod, and Next.js 15+, avoiding proprietary libraries.
This guide outlines building a scalable SVG icon system using sprites, a shared component for accessibility, and automated sprite generation. It helps prevent inconsistent icons, DOM bloat, and accessibility issues in web applications as they grow.
The post shows that e‑signature pricing is an engineering constraint and walks through modeling effective cost per completed envelope, preventing duplicate billing with idempotency, and monitoring usage. It includes a JavaScript cost estimator and practical retry handling advice.
A step‑by‑step tutorial showing how to run a persistent, free Cloudflare Tunnel alongside a TypeScript/Node.js webhook consumer in Docker Compose, replacing ngrok for local webhook debugging.
The tutorial shows how to build a browser‑only P2P file transfer using WebRTC DataChannels, the Streams API, and WebCrypto to encrypt 64 KB chunks on the fly, while applying backpressure via bufferedAmountLowThreshold. This prevents memory blow‑outs and ensures integrity with per‑chunk SHA‑256 verification.
A step‑by‑step tutorial for building a deterministic AST‑based security scanner that runs in GitHub Actions to catch prototype‑pollution, high‑entropy secrets, and unauthorized network egress in AI‑generated pull requests.
A step‑by‑step tutorial showing how to implement HyperLogLog and Count‑Min Sketch in pure TypeScript for Node.js, with a fast MurmurHash3‑x86‑32, memory‑bounded registers, merge support, and a Vitest benchmark suite that runs under `--expose-gc`.
This article differentiates data-driven and event-driven architectures, explaining that data-driven focuses on state for analysis, while event-driven focuses on changes for real-time reactions. It provides clear use cases and trade-offs for each, emphasizing that they often complement each other in complex systems.
Spec‑driven development encodes architectural rules as machine‑readable Zod schemas, letting automated agents (e.g., Copilot, Claude Code) be checked for boundary violations, API drift, and runtime invariants via AST analysis and CI tests.
A step‑by‑step tutorial for building a zero‑trust WebAuthn passkey recovery flow in Node.js/TypeScript. It covers generating 128‑bit backup codes, hashing them with Argon2id, rate‑limited verification, time‑boxed JWT recovery sessions, and orchestrating new credential registration with @simplewebauthn/server while revoking lost credentials and rotating codes.
The article walks through building a TypeScript middleware that validates RAG citations by checking exact byte‑span offsets against source buffers, replacing fuzzy heuristics with deterministic guarantees. Benchmarks show sub‑millisecond verification for 1,000 citations across 50 documents.
A step‑by‑step tutorial showing how to add a typed decision layer (using Jev and Pydantic) to a LangChain agent so you can route requests to cheaper or more capable models and gate risky tool calls, with concrete Python code and cost‑trade‑off notes.
A step‑by‑step tutorial showing how to build a typed context‑compaction gate for AI agents in TypeScript using LangChain and Zod. It defines a discriminated‑union schema for keep/summarize/discard actions, implements a fast gpt‑4o‑mini classifier, validates decisions at runtime, and wires the gate as middleware in an agent loop, with testing and production‑grade tuning advice.
The article walks through building a browser‑based file integrity checker that reads a file, computes its SHA‑256 hash with the Web Crypto API, and compares it to a trusted hash supplied by the user. It also covers handling large files, accessibility, and the security limits of client‑side hashing.
Juicebox and Pin are AI‑driven sourcing tools aimed at different buyer personas: Juicebox targets recruiting teams with shared CRM, permissions, and a deep intelligence layer (compensation, growth‑stage, bias audits), while Pin is a solo‑recruiter assistant that automates sourcing, outreach, and scheduling in a single‑user workflow. The article compares scale, collaboration, intelligence, and gov…
AI‑driven monitoring replaces static thresholds with learned baselines, cutting noise and surfacing real user‑impact issues. However, teams still need to explicitly monitor DNS, SSL, content integrity, and multi‑region performance to avoid blind spots.
A step‑by‑step guide for turning support tickets into well‑structured GitHub issues. It defines escalation criteria, outlines a decision table for support, specifies required fields, and provides a minimal Node.js 24 adapter that validates input, builds a markdown issue body, and calls the GitHub Issues API with proper error handling and security considerations.
Static CPU/memory thresholds generate noise because workloads vary by time‑of‑day, day‑of‑week, and long‑term trends. Adaptive monitoring learns per‑server baselines (using simple ML on historic metrics) and creates dynamic thresholds plus anomaly alerts. ManageEngine OpManager’s Zia engine is presented as a turnkey AIOps solution that auto‑learns baselines, lets you set sensitivity, and adds ale…
This tutorial demonstrates building an event-driven lead scoring pipeline using Node.js and PostgreSQL. It focuses on robust design patterns like idempotency, secure webhook processing, and transactional consistency with a transactional outbox.
Juicebox and Noon are AI‑sourced recruiting platforms that differ on control: Juicebox lets recruiters brief and steer autonomous agents, surfacing search rationale and offering ISO‑42001‑ready governance; Noon trains an autonomous sourcer to run the top‑of‑funnel end‑to‑end with less human oversight. The guide suggests trialing both by testing mid‑search steering (Juicebox) versus hands‑off qual…
The article shows how to run SeaweedFS and Garage together in a single Docker‑Compose file to provide low‑memory, S3‑compatible local storage, avoiding MinIO’s larger footprint and licensing concerns. It includes bucket‑seeding scripts and a Node.js test suite using AWS SDK v3.
