DEV Community • 2026-07-30 21:16

What Is Temperature in AI? (And How to Stop Getting Poetry When You Asked for a Grocery List)

What Is Temperature in AI? (And How to Stop Getting Poetry When You Asked for a Grocery List) Remember Magic 8-Balls? Those plastic oracles you'd shake for life advice, only to get "Reply hazy, try again" when you asked if your crush liked you back? Imagine someone added a little dial on the bottom. Turn it all the way to zero and the thing becomes painfully predictable, only ever offer...

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DEV Community • 2026-07-30 21:15

I checked every MCP server in the official registry. About 1 in 10 is broken.

There is a number going around that roughly half of all remote MCP servers are dead. I had repeated it myself, in the README of a tool I published. I could not find where it came from, so I measured it. The answer is that about one in ten is actually broken. The "half" figure appears to come from counting servers that require an API key as if they were down. Here is the method and the full brea...

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4m read
DEV Community • 2026-07-30 21:15

I checked every MCP server in the official registry. About 1 in 10 is broken.

There is a number going around that roughly half of all remote MCP servers are dead. I had repeated it myself, in the README of a tool I published. I could not find where it came from, so I measured it. The answer is that about one in ten is actually broken. The "half" figure appears to come from counting servers that require an API key as if they were down. Here is the method and the full brea...

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4m read
DEV Community • 2026-07-30 21:11

Building a Python Curriculum That Starts Before You've Opened a Terminal

Most "beginner" Python courses aren't actually beginner courses. Lesson one usually opens with variables or print(), quietly assuming you already know what a terminal is, how to install something, or what a .py file even means. That assumption is exactly where most self-taught learners bounce — not because Python is hard, but because the ten minutes of orientation that would've made everything aft...

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HackerNoon • 2026-07-30 21:05

How to Build a Complete File-Sharing Application Using Filestack

This guide walks through building a complete file-sharing application using Filestack for uploads, storage, CDN delivery, and image processing.

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Why Your LLM Calls Need a Circuit Breaker: A Lesson from Last Party 🔌
DEV Community • 2026-07-30 21:02

Why Your LLM Calls Need a Circuit Breaker: A Lesson from Last Party 🔌

Carnival time has begun. 🎉 We are organizing a house party, and if you are in and around Bangalore, you are invited. Just one condition: Don't be late. We all have that one friend who is always late. We still invite them. Then we start checking the phone. "Any minute now." Meanwhile, everyone is standing around, plans are on hold, food is getting cold, ice is melting, and patience is slow...

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14m read
Lobsters • 2026-07-30 21:02

You have been mislead about lightbulbs

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1m read
DEV Community • 2026-07-30 21:00

OpenAI’s Evaluation Playbook Puts Harness Design at the Center of Model Testing

OpenAI is urging a broader view of frontier-model evaluation: benchmark results reflect not only the model being tested, but also the surrounding system used to test it. In its official playbook for trustworthy third-party evaluations, the company says API settings, prompting, tool access, state management, compute budgets, scoring, and harness design can materially affect conclusions about model ...

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DEV Community • 2026-07-30 21:00

Debugging inbound webhooks locally without a tunnel

Testing an inbound webhook is annoying in a way that's out of proportion to the problem. A provider — Stripe, GitHub, Shopify, whatever — will POST a JSON body to a URL you own. You need to see exactly what they send, and you need to send it again after you change your handler. Neither of those is hard. But the usual setup is: Start a tunnel so the provider can reach your laptop Paste the genera...

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Max-severity Exchange server flaw under active exploitation by Kremlin hackers
Biz & IT - Ars Technica • 2026-07-30 20:57

Max-severity Exchange server flaw under active exploitation by Kremlin hackers

Exploits can give persistent server access that survives credential rotation and disk re-imaging.

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Hacker News: Front Page • 2026-07-30 20:53

I obtained Claude Opus 5 system prompt

Article URL: https://claude.ai/share/98073770-0ad9-431f-a1e7-e0243db18758 Comments URL: https://news.ycombinator.com/item?id=49115620 Points: 4 # Comments: 4

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DEV Community • 2026-07-30 20:46

Your Documentation Is Your Funnel (And the One Page Nobody Writes)

Most companies file documentation under engineering and marketing under marketing, then wonder why the funnel leaks. For a developer product, the docs are the funnel. A developer evaluating you spends about thirty seconds on your homepage and then goes straight to the docs. Everything after that is decided there, by a person you will never speak to, who will not fill in a form to tell you why the...

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DEV Community • 2026-07-30 20:45

qsa.sh – An instant external security scan of your IP via curl

qsa.sh to give you an instant, outside-in security scan of your own public IP straight from your terminal. You can run it like this: curl qsa.sh What it does: It triggers a real external port and vulnerability scan (using open-source tools like naabu, nmap + vulners, and nuclei) of the public IP you're connecting from, streamed live back to your terminal in about 30 seconds. How it handles safe...

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Hacker News: Front Page • 2026-07-30 20:44

Man seeks millions after being shot by police in game-related swatting incident

Article URL: https://www.tucsonsentinel.com/local/report/072926_melendez_swatting/man-seeks-millions-after-being-shot-by-pima-deputies-swatting-incident/ Comments URL: https://news.ycombinator.com/item?id=49115506 Points: 6 # Comments: 0

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DEV Community • 2026-07-30 20:43

The memory layer that never calls an LLM: what that buys, and what it costs

Part 4 of **The Answerability Problem, and the one that isn't about abstention. Parts 1–3 argued that the field measures the wrong half and that my own system hits a wall on the right half. This part is the ledger: what RE-call is, what it loses at, and why you might still want the thing that loses. Code: RE-call (MIT). Three parts of "here is what doesn't work" earn one part of "here is what ...

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Hacker News • 2026-07-30 20:42

Show HN: Panini – bundle a Gleam app and BEAM into one self-contained binary

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DEV Community • 2026-07-30 20:40

OpenAI Says AI Benchmark Scores Depend on Harnesses, Budgets, and Memory Design

OpenAI is urging researchers, evaluators, and AI buyers to treat benchmark results as measurements of a model in a particular setup, not as permanent measures of a model's standalone capability. Its new guidance on third-party evaluations says the harness, resource budget, available tools, and approach to memory and context management can materially change observed performance, especially on long-...

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Hacker News • 2026-07-30 20:36

Show HN: Logan Basic v2.1 - An online BASIC interpreter.

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1m read
DEV Community • 2026-07-30 20:34

How to Verify an AI Crawler Is Who It Says It Is

Your server logs show a request from GPTBot. Should you trust it? The honest answer is: not on the strength of that string alone. A user-agent header is a claim the client makes about itself, and any client can claim anything. curl -A "GPTBot" takes about four seconds to type. If your robots.txt policy, your analytics, or your paywall logic branches on the user-agent string, it branches on unveri...

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DEV Community • 2026-07-30 20:33

“Does your agent know what it doesn’t know?” has no answer. It has a coordinate.

Part 3 of **The Answerability Problem. Part 1 showed the standard harness excluding the questions that test refusal, and my own system scoring 0.000 on them. Part 2 measured six candidate signals and found none that beat plain cosine. This part explains why both were asking a question that has no answer. Code and every number: RE-call (MIT). Two public benchmarks disagree about whether memory ...

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