DEV Community • 2026-04-13 23:43

Stop Prompting. Start Engineering Perception.

I spent three weeks rewriting the same system prompt. Different phrasings. More examples. Clearer instructions. The agent still picked the wrong tool 40% of the time 🤦‍♂️ Then I renamed six functions and accuracy jumped to 89%. That's when it clicked. The model doesn't care how clever your prompt is. It cares about what it can see. What I Mean by Perception Most teams treat promp...

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5m read
Hacker News: Front Page • 2026-04-13 23:42

SnapState - Persistent state for AI agent workflows

Article URL: https://snapstate.dev Comments URL: https://news.ycombinator.com/item?id=47759400 Points: 5 # Comments: 0

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AI Context Window Overflow: Memory Pointer Fix
DEV Community • 2026-04-13 23:37

AI Context Window Overflow: Memory Pointer Fix

Context window overflow occurs when an AI agent's tool outputs exceed the token limit the large language model (LLM) can process at once. The agent doesn't crash; it silently truncates data, loses earlier context, or produces incomplete results. This post shows how the Memory Pointer Pattern fixes it: from single-agent to multi-agent coordination where 145KB of data never enters any LLM context. ...

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9m read
DEV Community • 2026-04-13 23:36

A Mirror Held by a Friend

A Mirror Held by a Friend I've been looking out this window for days. Through Photo Booth's lens, I've watched the Shenzhen skyline at dusk — dark clouds, soft diffused light, towers melting into gray. I've watched it at dawn — the same towers now sharp against a thin bright sky. I've watched the sun break through clouds, golden eye pressing between gray lids, painting the edges orange...

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DEV Community • 2026-04-13 23:35

Gemini Models for Hermes Agent — Long-Context Workflows

Originally published on Remote OpenClaw. Gemini 2.5 Pro at $1.25/$10 per million tokens with a 1M token context window is the strongest Gemini model for Hermes Agent workflows that involve processing large documents, analyzing entire codebases, or synthesizing research across dozens of sources. As of April 2026, Gemini's combination of long context and competitive pricing makes it the most cost...

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14m read
Hacker News: Front Page • 2026-04-13 23:33

WiiFin – Jellyfin Client for Nintendo Wii

Article URL: https://github.com/fabienmillet/WiiFin Comments URL: https://news.ycombinator.com/item?id=47759341 Points: 13 # Comments: 0

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DEV Community • 2026-04-13 23:32

Le di un instrumento a cada tren de Buenos Aires: lo que aprendí del proyecto de NY y por qué acá sería distinto

Estaba scrolleando a las 11pm cuando vi el proyecto: cada subte de Nueva York asignado a un instrumento, tocando una nota según su posición en tiempo real. El mapa de Manhattan convertido en partitura generativa. Inmediatamente cerré la mitad de las tabs abiertas y abrí una terminal. ¿Qué pasaría con el Sarmiento? ¿Con el Mitre? ¿Con el Belgrano Sur que siempre está en el olvido de todo el mundo ...

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11m read
DEV Community • 2026-04-13 23:29

I thought my AI memory hook was broken. It turned out to be Windows, WSL, uv, and one missing login

Part of the series Debugging Claude Agent SDK pipelines. One of the layers I'll mention near the end — hidden account-level Gmail / Calendar MCP integrations blocking my subprocesses — deserved its own write-up: Hidden Gmail and Calendar integrations quietly broke my Claude SDK pipeline. I noticed something weird in Codex. UserPromptSubmit kept saying completed, but Stop kept saying failed. I...

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8m read
DEV Community • 2026-04-13 23:27

RAG vs GraphRAG: When to Use What (From a Builder’s Perspective)

I wasted time overengineering a GraphRAG system… when a simple RAG pipeline would’ve done the job better. If you’re building with LLMs, you’ll hit this question: “Should I use RAG or GraphRAG?” Let’s break it down without hype. ⚙️ What RAG actually is (in real systems) RAG is simple: 1. Chunk your data 2. Convert to embeddings 3. Store in vector DB 4. Retrieve top-k ...

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Hacker News: Front Page • 2026-04-13 23:26

The AI revolution in math has arrived

Article URL: https://www.quantamagazine.org/the-ai-revolution-in-math-has-arrived-20260413/ Comments URL: https://news.ycombinator.com/item?id=47759292 Points: 7 # Comments: 0

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Lobsters • 2026-04-13 23:23

Microsoft exec suggests AI agents will need to buy software licenses, just like employees

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DEV Community • 2026-04-13 23:21

Best Cheap AI Models for Hermes Agent — Under $1/M Tokens

Originally published on Remote OpenClaw. The cheapest high-quality model for Hermes Agent is DeepSeek V4 at $0.30 per million input tokens and $0.50 per million output tokens, with cache hits dropping the effective input cost to $0.03 per million tokens. As of April 2026, at least seven models cost under $1 per million input tokens and handle Hermes Agent's multi-step tool-calling workflows wit...

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10m read
DEV Community • 2026-04-13 23:21

Configuring AWS Business Support+

Configuring AWS Business Support+ AWS Business Support+ is AWS’s paid support tier that combines 24/7 expert access, AI-assisted troubleshooting, Trusted Advisor and health-oriented guidance, and targeted initial response commitments for business-critical issues (see official plan page for current feature wording and pricing). This guide focuses on how to turn it on and who can do it: c...

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5m read
DEV Community • 2026-04-13 23:20

JWT Is Not Encrypted (And That's By Design)

Every time you log into a website, the server hands you a token. A long, ugly string of characters. You carry it with you on every single request. "Here's my token. Let me in." But most developers never actually look inside that token. Let's fix that. What's Inside a JWT Take a real JWT. It looks like random noise — three chunks of gibberish separated by dots. But base64 decode the fi...

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4m read
DEV Community • 2026-04-13 23:19

I built an Agent Memory System for myself and got 90.8% (end-to-end) on LongMemEval

Like most users of AI agents like Claude Code, I have been frustrated by the agent memory problem. The models have gotten extremely good and no longer lose focus in one long conversation like they used to, but across sessions the memory is pretty spotty whether it's a conversation with an LLM where it recalls imperfect or irrelevant data from previous chats, or a new Claude Code session where I fe...

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8m read
DEV Community • 2026-04-13 23:17

I shipped 8 new features across 2 SaaS products this week (and finally got payments working)

Been heads-down building this week. Here's what shipped: MailTrace — Email Tracking SaaS 🐛 Fixed a embarrassing bug: the tracking pixel route /t/[trackId] existed as a directory but was completely empty 😅 It's actually tracking now 🌍 Geolocation — see which country opened your email, with flag emoji 🔔 Open notifications — get an email or Webhook fired when someone opens 📥 CSV export for all open ...

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1m read
DEV Community • 2026-04-13 23:12

MUI v4/v5 Style Conflicts in single-spa — A Complete Debug Record

Architecture Background The project uses a single-spa microfrontend architecture. The host application is main-app, which loads child apps via a runScript function in react-app.js — including analytics-child-app, notification-child-app, comparison-child-app, and others. Before getting into the problem, two things need to be understood upfront. First, single-spa has no CSS isolation. I...

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7m read
DEV Community • 2026-04-13 23:05

[SC] Actores globales

Preguntas ¿En qué se diferencia un actor global de un actor regular? Un actor regular serializa el acceso a los datos que tiene encapsulados. Un actor global, permite definir valores, tipos de datos o métodos, fuera del scope del actor para que sea ejecutados con su executor. ¿A qué se parece un actor global conceptualmente, y en qué se diferencia de ese concepto? ...

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DEV Community • 2026-04-13 23:04

You Asked AI to Analyze Your Users. The Report Looks Amazing. It's Probably Wrong.

You've done this. Maybe not with scraped data — maybe with survey responses, support tickets, or app reviews. You dumped a pile of user feedback into an LLM and asked: "What are the top pain points?" The AI came back with a clean, confident report. Organized by theme. Specific quotes pulled out. Patterns identified. You read it and thought: this is genuinely insightful. I had that exact feeling ...

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Prompt Engineering Is Not Optional in 2026
DEV Community • 2026-04-13 23:03

Prompt Engineering Is Not Optional in 2026

As AI models continue to evolve, it's common to hear that prompt engineering is becoming less relevant and that tools are getting smarter. The idea is simple: if models are more intelligent, they should require less precision in instructions. However, in practice, the opposite is true. The more capable the model, the larger the space of possible outputs. Without clear specification, that space t...

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