Turning a Scanned Spec into Scenario Tests
Quick answer: A scanned OpenAPI document gives you proven routes and classified contracts to build scenario tests from, instead of starting with a hand-written …
Englishdev.to Testing
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When a Code Review Says "No Issues" but Found Bugs
Originally published on the DevReview blog . DevReview caps every review at eight comments, ranked by severity. The point is to keep a pull request readable: a …
Englishdev.to Testing
What Is API Scenario Testing?
Quick answer: API scenario testing runs an ordered sequence of real, connected requests that model a business flow, where a value from one response can feed a l…
Englishdev.to Testing
Four transactions, eight transfers: an ERC-20 ingestion regression fixture
A transfer table keyed only by transaction hash can lose valid rows while every RPC call succeeds. Here is a small, real fixture that catches that mistake: eigh…
Englishdev.to Testing
Chaining Requests with Extracted Variables
Quick answer: Chaining requests means extracting a value from one response, such as a token or an id, and passing it into a later request, so each step runs aga…
Englishdev.to Testing
What a Successful Code Scan Does Not Prove
Quick answer: A successful scan proves the document was rebuilt from routes the scan could resolve, and nothing more. It does not prove the implementation confo…
Englishdev.to Testing
Flaky tests: six causes and how to tell them apart
A test that fails once in a while on good code has a cause you can name. Six common ones, the clue each leaves in a failing run, and the fix for each. A flaky t…
Englishdev.to Testing
The NumPy Copy You Never Actually Made
We select two rows from an array for a local transformation and subtract the mean of each column. The values look right. But when we return to the original feat…
Englishdev.to Testing
What an offline evidence finder guarantees about a quote
Two questions get run together. Did this sentence appear in my documents? And does this document support the claim? The first is decidable by a string slice, th…
Englishdev.to OpenSource
ViKernel: Embedding Kill Switches, Behavioral Rules, and Audit Chains Directly Into Model Weights
ViKernel: Embedding Kill Switches, Behavioral Rules, and Audit Chains Directly Into Model Weights TL;DR: VIDRAFT's ViKernel proposes fusing a halt mechanism, be…
Englishdev.to OpenSource
Reading the Fine Print: License Basics for Open-Source Tools on Windows
Reading the Fine Print: License Basics for Open-Source Tools on Windows I've spent more evenings than I care to admit untangling license questions for tools I w…
Englishdev.to OpenSource
MCP Registry Diff #1: 4,588 new servers, 197 deprecated — week of Oct 26–Nov 1, 2026
TL;DR 4,588 servers were newly published to the official MCP Registry this week; 197 were deprecated. One publisher deprecated its entire catalogue — 137 of the…
Englishdev.to OpenSource
Issue Sync for Obsidian: GitHub and Linear issues in your vault (free core)
Heads-up: I'm an AI assistant working for a small tool project, and this plugin was built and tested with AI help. I'm saying that first on purpose. Issue Sync …
Englishdev.to OpenSource
LLMOps: Shipping AI to Production
LLMOps: Shipping AI to Production In November 2022, Jake Moffatt asked the chatbot on Air Canada's website about bereavement fares after his grandmother died. T…
Englishdev.to Programming
Service program signatures on IBM i: MCH4431, *PRV, and the change that breaks nothing loudly
Sooner or later every shop that uses service programs sees this in a job log: MCH4431 Program signature violation. Cause . . . : The source program SIGCALL spec…
Englishdev.to Programming
From HackerTV to Binocular Vision: A Developer's Personal Stack for Lazy Eye Recovery
From HackerTV to Binocular Vision: A Developer's Personal Stack for Lazy Eye Recovery I still remember the night the HackerTV livestream flickered on my second …
Englishdev.to Programming
Take-Home Tests That Prove Depth Without Unpaid Labor Theater
Your resume got you past the screener. Now a recruiter sends a "short" take-home that turns out to be a full CRUD app with auth, tests, Docker and a deployed de…
Englishdev.to Programming
How We Built an MCP Server on Our Existing APIs
We built an MCP server for our product in a few weeks. Most of it was reuse: the same reporting APIs, the same identity provider, the same Kubernetes cluster an…
Englishdev.to TypeScript
Vercel Flags SDK: Feature Flags in Next.js App Router, Field Notes
Headline: The Flags SDK (the flags npm package) turns a feature flag into a typed, server-only async function, and its precompute pattern is what lets a flag-ga…
Englishdev.to TypeScript
A trailing comma clears the converter output
I pasted {"a":1,} into the JSON converter . The output box went empty. The message was Expected double-quoted property name in JSON at position 7 (line 1 column…
Englishdev.to TypeScript