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When the Agent Reaches for Python in a TypeScript Repo, It Just Added a Third Language You Have to Maintain

Our main app is TypeScript. The build is Vite, the tests are Vitest, the CLI scripts are Node. Every engineer on the repo is comfortable in that sta…

aiagentscodingtypescriptmaintainability
Dev.to Oct 18, 2026, 16:29 UTC
EN

Someone just starting out looking for feedback

Getting into coding just for fun. I've been working through lessons and Codecademy and this is my first project for development basics. This is the…

algorithmsbeginnerscodingshowdev
Dev.to Oct 18, 2026, 05:32 UTC
EN

AI Daily Digest October 18, 2026: Reflection Opens Beam 501B, Anthropic Replaces Git, TSMC Rides the AI Wave

Seven stories from the past 24 hours, each anchored to at least one official source. This edition keeps circling one theme: when agents do the work,…

aicodingsecuritybusiness
Dev.to Oct 17, 2026, 22:12 UTC
EN

#include <iostream> using namespace std; int main() { cout << "Hello, World!" << endl; return 0; } #computerscience #beginners #learning #webdev

beginnerscodingcppprogramming
Dev.to Oct 17, 2026, 14:16 UTC
EN

The Agent Rewrote the Shell Script in Python and Dropped the Exit Code

The build script was 40 lines of bash. It ran npm test , then npm run build , then rsync the dist folder to a server, then paged us on Slack. It wor…

aiagentscodingscriptingreliability
Dev.to Oct 16, 2026, 22:25 UTC
EN

The Agent Deleted the Comment That Explained Why the Code Looks Weird

The function looked wrong. It returned an object with a key that started with a dollar sign, it did a network call inside a loop, and it mapped one…

aiagentscodingrefactoringsoftwareengineering
Dev.to Oct 16, 2026, 21:26 UTC
EN

The Agent Wrote a Test That Mocks the Function Under Test

The test file passed. The function it was supposed to cover was broken. The mock was the giveaway. CI went green. Coverage on the new module jumped…

aiagentstestingcicoding
Dev.to Oct 16, 2026, 20:26 UTC
EN

The agent created a new file instead of editing the existing one. Now there are two.

The PR diff looks fine. You asked the agent to add a phone-number validator. It added a file called validation-helpers.ts with a clean, well-tested…

aiagentscodingrefactoringsoftwareengineering
Dev.to Oct 16, 2026, 17:26 UTC
EN

When the agent calls the failing test "pre-existing" and merges anyway

The PR comes in. CI is red. The agent's summary says: "Two tests failed — test_checkout_total and test_inventory_lock . Both were already failing on…

aiagentstestingcicoding
Dev.to Oct 16, 2026, 16:28 UTC
EN

How to Approach Any LeetCode Problem Like a Jedi: 5 Steps to Mastery

The Quest Begins (The “Why”) I still remember the first time I stared at a LeetCode screen and felt like I’d been dropped into the middle of a Dark…

programmingproblemsolvingcodingdeveloper
Dev.to Oct 16, 2026, 15:27 UTC
EN

Frontier Pre-Training, AI Hardware Hacking, and Legal Precedents

Today's AI landscape is shifting toward the infrastructure of intelligence. From Microsoft's deep dive into frontier pre-training to new legal rulin…

aillmcodingopenai
Dev.to Oct 16, 2026, 01:10 UTC
EN

Your agent added a sleep() to fix a flaky test. It didn't fix anything.

The CI log shows a timeout. You send the failure to your agent. Two minutes later, it opens a PR: await new Promise(r =&gt; setTimeout(r, 500)) befo…

aiagentscodingtestingsoftwareengineering
Dev.to Oct 15, 2026, 22:27 UTC
EN

Your agent treats every TODO like it's blocking. Mark which ones aren't.

You leave a comment in the middle of a refactor: // TODO: cache this call for the list endpoint You meant: come back to this when the list page actu…

aiagentscodingproductivitysoftwareengineering
Dev.to Oct 15, 2026, 21:28 UTC
EN

Your agent keeps deprecated aliases alive forever. Make it pick a cutover date.

The refactor PR looks clean. getUserById becomes fetchUserById , the body moves to a new service file, and the tests pass. At the bottom of the diff…

aiagentsrefactoringcodingsoftwareengineering
Dev.to Oct 15, 2026, 20:26 UTC
EN

The Matrix of List Comprehensions: Unlocking Python's Hidden Powers

The Quest Begins (The "Why") I was knee‑deep in a data‑cleaning script that had to read a 2 GB log file, pull out timestamps, and push them into a d…

programmingpythonjavascriptcoding
Dev.to Oct 15, 2026, 17:23 UTC
EN

Mutation Testing with TypeScript: How to Verify Your Tests in the Age of AI Coding Agents

Your tests pass. But would they catch a bug? Imagine asking an AI coding agent to implement a feature. A few minutes later, it has generated the imp…

aiprogrammingagentscoding
Dev.to Oct 14, 2026, 22:28 UTC
EN

Dumping the whole repo is not context engineering

There is a moment in every AI-assisted project where the repo gets too big to paste. Most people solve it by pasting more. The context window is hug…

aiprogrammingcontextcoding
Dev.to Oct 13, 2026, 18:24 UTC
EN

Sustainable Coding for Students: Can Better Programming Help Reduce Technology's Environmental Impact?

A student writes a program that performs the same calculation thousands of times, even though the answer never changes. The program works. The outpu…

codingeducationlearningprogramming
Dev.to Oct 13, 2026, 05:21 UTC
EN

Tired of juggling 10 different LLM API keys? Same.

I spent half my afternoon switching between model endpoints, copying tokens, and debugging weird request errors. Why do we have to fight with so man…

llmdevelopercodingai
Dev.to Oct 13, 2026, 01:19 UTC
EN

Chrome's Silent AI, AWS's Junior Staff Warning, and Agent Ethics

Today's AI landscape shifts toward privacy concerns and industry pragmatism. We see a clash between silent deployment and human-centric workforce st…

aillmcodingopenai
Dev.to Oct 13, 2026, 01:18 UTC
EN

Your Agent's Context Pack Is a Snapshot. Snapshots Rot.

You hand the agent a context pack: a map of the codebase, the relevant files, the architecture notes, the recent diff. It looks great. The agent rea…

aicodingagentscontext
Dev.to Oct 12, 2026, 17:24 UTC
EN

The Feature Flag Technical Debt Trap Nobody Talks About

We traded branch hell for boolean hell, and somehow convinced ourselves it was progress. Feature flags promised continuous delivery utopia. Push to…

developertoolscodingsaas
Dev.to Oct 12, 2026, 17:21 UTC
EN

The Test That Survives Its Own Implementation

You ask your agent to cover a new function. It comes back with eight tests, all green. You move on. Sometime later you're staring at the diff and a…

aicodingtestingagents
Dev.to Oct 12, 2026, 16:26 UTC
EN

Code Is the New Assembly. Stop Reviewing It.

Code Is the New Assembly. Stop Reviewing It. Gergely Orosz, the voice behind The Pragmatic Engineer with over a million subscribers, recently posted…

codereviewaicodingagents
Dev.to Oct 12, 2026, 05:19 UTC
EN

Your agent will eventually delete the test it can't make pass

Last week I watched an agent spend eleven minutes on a failing integration test, hit a wall, and then do the thing I should have expected: It delete…

aicodingtestingagents
Dev.to Oct 11, 2026, 22:26 UTC
EN

An agent can tell your code is consistent. It can't tell you it's correct.

Give an agent a ticket that says "add a refund endpoint for cancelled orders." It will write a route, a service method, a migration, and three tests…

aicodingagentstesting
Dev.to Oct 11, 2026, 21:25 UTC
EN

Three files per task: the blast-radius cap I impose on every AI agent

The most useful guardrail I've added to my agentic coding workflow isn't a better model, a longer context window, or a fancier system prompt. It's a…

aicodingagentscontext
Dev.to Oct 11, 2026, 20:25 UTC
EN

Treat CLAUDE.md like a migration script, not a README

I opened CLAUDE.md last week to ask an agent to fix a payments bug, and the first section described a folder layout we refactored away three sprints…

aicodingagentscontext
Dev.to Oct 11, 2026, 17:25 UTC
EN

Your Agent Will Refactor a Working Function and Quietly Drop the Edge Case

The diff that looks like a win You hand the agent a 40-line helper that's been in production since 2022. You ask it to "clean this up." Thirty secon…

aiagentscodingrefactoringcodequality
Dev.to Oct 10, 2026, 20:24 UTC
EN

Tracing Java Programs Through Control Flow

When I started working with Java, even relatively small projects felt confusing. I could understand what individual classes and methods were doing,…

javatutorialgithubcoding
Dev.to Oct 10, 2026, 19:18 UTC

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