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137Foundry

Custom Software, Built Around Your Business: Websites, mobile apps, AI agents, and automation systems designed to replace fragmented tools and recurring fees.

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Why Templating Engines' Auto-Escaping Breaks the Moment You Bypass It
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Why Templating Engines' Auto-Escaping Breaks the Moment You Bypass It

#webdev #security #javascript #python
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6 min read
How to Build a Hostile but Plausible Input Fixture List for Testing Escaping Boundaries
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How to Build a Hostile but Plausible Input Fixture List for Testing Escaping Boundaries

#testing #security #python #webdev
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6 min read
How to Test Whether Your Alerts Actually Fire Before You Need Them
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How to Test Whether Your Alerts Actually Fire Before You Need Them

#automation #testing #programming #productivity
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5 min read
Why Cause-Based Alerts Break Every Time You Refactor a Pipeline
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Why Cause-Based Alerts Break Every Time You Refactor a Pipeline

#automation #ai #programming #productivity
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6 min read
Why Session Replay Catches UX Bugs That Funnel Analytics Never Will
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Why Session Replay Catches UX Bugs That Funnel Analytics Never Will

#webdev #productivity
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5 min read
How to Implement Autosave for Web Forms Without Hammering Your API
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How to Implement Autosave for Web Forms Without Hammering Your API

#webdev #programming #productivity
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5 min read
Why a Single Poison Pill Message Can Quietly Stall an Entire Background Job Queue
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Why a Single Poison Pill Message Can Quietly Stall an Entire Background Job Queue

#webdev #programming #productivity
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5 min read
Job Queue vs Message Queue vs Task Scheduler: The Difference That Actually Matters
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Job Queue vs Message Queue vs Task Scheduler: The Difference That Actually Matters

#webdev #programming #productivity
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5 min read
Why Job Queue Starvation Sneaks In Even After You Add Priority Lanes
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Why Job Queue Starvation Sneaks In Even After You Add Priority Lanes

#webdev #programming #productivity
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6 min read
5 Free Tools for Monitoring Background Job Queues in Production
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5 Free Tools for Monitoring Background Job Queues in Production

#webdev #programming #productivity
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5 min read
Why Queue Depth Alone Is a Bad Signal for Autoscaling Workers
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Why Queue Depth Alone Is a Bad Signal for Autoscaling Workers

#webdev #backend #programming #automation
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6 min read
How to Version Job Payloads So Schema Changes Don't Break In-Flight Work
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How to Version Job Payloads So Schema Changes Don't Break In-Flight Work

#webdev #backend #programming #node
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5 min read
How to Add Correlation IDs to Background Job Logs So You Can Actually Trace a Failure
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How to Add Correlation IDs to Background Job Logs So You Can Actually Trace a Failure

#webdev #backend #logging #programming
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5 min read
Why At Least Once Delivery Breaks Assumptions Most Teams Never Check
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Why At Least Once Delivery Breaks Assumptions Most Teams Never Check

#webdev #backend #programming #architecture
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5 min read
Why We Stopped Trusting In-Memory Job Queues for Anything That Matters
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Why We Stopped Trusting In-Memory Job Queues for Anything That Matters

#webdev #backend #node #programming
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5 min read
How to Add Graceful Shutdown Handling to a Node.js Worker Process
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How to Add Graceful Shutdown Handling to a Node.js Worker Process

#node #backend #webdev #javascript
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5 min read
Why Icon Fonts Are a Bad Default for Modern Web Apps
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Why Icon Fonts Are a Bad Default for Modern Web Apps

#webdev #a11y #css
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5 min read
How to Build an SVG Icon Sprite System That Doesn't Bloat Your Bundle
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How to Build an SVG Icon Sprite System That Doesn't Bloat Your Bundle

#webdev #css #frontend
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5 min read
Why Distributed Rate Limiting Needs a Shared Store, Not Local Counters
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Why Distributed Rate Limiting Needs a Shared Store, Not Local Counters

#webdev #backend #api #scalability
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5 min read
Why Toggle Switches Are the Wrong UI Pattern for Destructive Settings
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Why Toggle Switches Are the Wrong UI Pattern for Destructive Settings

#ux #design #webdev
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5 min read
How to Build a Settings Search Bar That Actually Helps Power Users
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How to Build a Settings Search Bar That Actually Helps Power Users

#webdev #javascript #ux
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5 min read
How to Stream-Parse Large CSV Files in Node.js Without Blowing Up Memory
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How to Stream-Parse Large CSV Files in Node.js Without Blowing Up Memory

#javascript #node #programming
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5 min read
Why Silent Type Coercion Is the Most Dangerous Bug in a Data Import
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Why Silent Type Coercion Is the Most Dangerous Bug in a Data Import

#programming #python #datascience
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5 min read
How to Detect a Dead WebSocket Connection Before Users Notice
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How to Detect a Dead WebSocket Connection Before Users Notice

#webdev #javascript #programming
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5 min read
Why Application-Level Heartbeats Beat TCP Keepalive for WebSockets
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Why Application-Level Heartbeats Beat TCP Keepalive for WebSockets

#webdev #programming #networking
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5 min read
7 Free Tools and References for Building Better Loading States
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7 Free Tools and References for Building Better Loading States

#webdev #ui #react #productivity
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5 min read
How to Build a Reusable Skeleton Screen Component in React
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How to Build a Reusable Skeleton Screen Component in React

#react #webdev #javascript #tutorial
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5 min read
Why Retries Alone Don't Fix Flaky Third-Party APIs in Data Pipelines
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Why Retries Alone Don't Fix Flaky Third-Party APIs in Data Pipelines

#python #automation #api #reliability
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5 min read
How to Combine Circuit Breakers and Dead Letter Queues in a Data Pipeline
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How to Combine Circuit Breakers and Dead Letter Queues in a Data Pipeline

#python #api #automation #datapipeline
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5 min read
Setting Up Style Dictionary to Ship Design Tokens to Every Platform
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Setting Up Style Dictionary to Ship Design Tokens to Every Platform

#webdev #css #tooling #frontend
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5 min read
How Figma Variables Changed the Design-to-Code Handoff
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How Figma Variables Changed the Design-to-Code Handoff

#webdev #design #css #frontend
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5 min read
How to Run Old and New Systems in Parallel Without Doubling Your Workload
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How to Run Old and New Systems in Parallel Without Doubling Your Workload

#migration #legacy #programming #api
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5 min read
7 Free Tools for Auditing an Old Codebase Before You Migrate It
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7 Free Tools for Auditing an Old Codebase Before You Migrate It

#legacy #migration #programming #productivity
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5 min read
How to Write a CLAUDE.md or .cursorrules File That Actually Gets Followed
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How to Write a CLAUDE.md or .cursorrules File That Actually Gets Followed

#ai #automation #programming
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5 min read
7 Free Tools for Auditing What Your AI Coding Assistant Actually Changed
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7 Free Tools for Auditing What Your AI Coding Assistant Actually Changed

#ai #automation #programming
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5 min read
What Actually Happens When You Paginate a Live, Growing Table
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What Actually Happens When You Paginate a Live, Growing Table

#webdev #programming #database #api
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6 min read
How to Build API Pagination That Survives Rate Limits and Client Retries
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How to Build API Pagination That Survives Rate Limits and Client Retries

#api #webdev #backend #programming
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5 min read
Seven Free Tools for Sandboxing What an AI Coding Assistant Can Execute
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Seven Free Tools for Sandboxing What an AI Coding Assistant Can Execute

#ai #automation #programming
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6 min read
What Actually Breaks When an AI Coding Assistant Has Too Much Shell Access
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What Actually Breaks When an AI Coding Assistant Has Too Much Shell Access

#ai #automation #programming
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6 min read
How to Write a Data Export Script That Survives a Vendor Migration
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How to Write a Data Export Script That Survives a Vendor Migration

#python #api #productivity
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6 min read
How to Audit Your Own Integration Surface Before It Becomes a Lock-In Problem
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How to Audit Your Own Integration Surface Before It Becomes a Lock-In Problem

#business #api #productivity
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5 min read
Why Faceted Navigation Is the Silent Killer of Crawl Budget on Ecommerce Sites
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Why Faceted Navigation Is the Silent Killer of Crawl Budget on Ecommerce Sites

#seo #ecommerce #webdev #architecture
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5 min read
How to Write a Script That Finds Every Parameterized URL Variant on Your Site
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How to Write a Script That Finds Every Parameterized URL Variant on Your Site

#seo #webdev #python #productivity
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5 min read
Why Logging in UTC Everywhere Makes Incident Debugging Dramatically Faster
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Why Logging in UTC Everywhere Makes Incident Debugging Dramatically Faster

#ai #automation #programming
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6 min read
How to Build a Debounce Layer for Duplicate Webhook Deliveries
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How to Build a Debounce Layer for Duplicate Webhook Deliveries

#programming #api #productivity
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6 min read
How to Version Mobile API Contracts Without Breaking Old App Installs
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How to Version Mobile API Contracts Without Breaking Old App Installs

#api #mobile #programming
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6 min read
Why Your App's Splash Screen Is Hiding a Race Condition
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Why Your App's Splash Screen Is Hiding a Race Condition

#mobile #programming #productivity
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6 min read
Seven Free or Low-Cost Tools for Tracking SaaS Spend and Contract Renewal Dates
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Seven Free or Low-Cost Tools for Tracking SaaS Spend and Contract Renewal Dates

#business #productivity #tools #saas
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5 min read
How to Build a SaaS Renewal Calendar That Actually Prevents Surprise Charges
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How to Build a SaaS Renewal Calendar That Actually Prevents Surprise Charges

#business #productivity #automation #saas
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5 min read
Why Zombie Tag Pages Quietly Tank Your Organic Traffic
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Why Zombie Tag Pages Quietly Tank Your Organic Traffic

#seo #webdev #wordpress #cms
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6 min read
How to Build a Sitemap-vs-Indexed URL Diff Script in Python
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How to Build a Sitemap-vs-Indexed URL Diff Script in Python

#seo #python #webdev #productivity
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6 min read
Six Open-Source Tools for Building a Data Quality Gate in a Python Pipeline
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Six Open-Source Tools for Building a Data Quality Gate in a Python Pipeline

#python #api #productivity
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6 min read
How to Write Your First Data Quality Assertion Set From an Incident Log
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How to Write Your First Data Quality Assertion Set From an Incident Log

#programming #api #productivity
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6 min read
How to Write a Python Script That Finds Cannibalized Queries in a Search Console Export
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How to Write a Python Script That Finds Cannibalized Queries in a Search Console Export

#python #seo #tutorial
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5 min read
Why Keyword Cannibalization Is an Information Architecture Problem, Not a Content Problem
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Why Keyword Cannibalization Is an Information Architecture Problem, Not a Content Problem

#seo #webdev #productivity
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6 min read
How to Design Idempotency Keys That Survive Upstream Event Format Changes
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How to Design Idempotency Keys That Survive Upstream Event Format Changes

#dataengineering #integration #reliability #api
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7 min read
How to Retrofit a Dry-Run Mode Into an Existing Data Integration
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How to Retrofit a Dry-Run Mode Into an Existing Data Integration

#dataengineering #integration #testing #devops
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7 min read
How We Refactored Three Empty States Out of a Production Dashboard
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How We Refactored Three Empty States Out of a Production Dashboard

#webdev #productivity #ux
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6 min read
How to Detect Filter-Empty vs Data-Empty States in a Web App
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How to Detect Filter-Empty vs Data-Empty States in a Web App

#webdev #programming #ux
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7 min read
Why Pessimistic UI Is Still the Right Call for Destructive Actions
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Why Pessimistic UI Is Still the Right Call for Destructive Actions

#webdev #programming #productivity #javascript
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6 min read
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