Code a MCP-powered Agent in ~70 Lines of Code | Kala

🔗 View in your browser | ✍️ Publish on FAUN.dev | 🦄 Become a sponsor

Kala

#ArtificialIntelligence #MachineLearning #MLOps

🔍 Inside this Issue

The ground’s shifting under our feet: 71% fear AI will kill jobs while AWS calls replacing juniors the dumbest play in tech. From probabilistic product design and failure-fed agents to infra that hits sub‑millisecond latency, MCP security tripwires, GPT‑5 vs 4o, and two builds you can ship today—there’s signal in every click.

🗣️ AWS CEO says AI replacing junior staff is 'dumbest idea'
😬 71% of Americans Say AI Could ‘Put People Out of Work Permanently’
🎲 Building AI Products In The Probabilistic Era
🧠 Context Engineering for AI Agents: Lessons from Building Manus
🔐 Creating AI agent solutions for warehouse data access and security
⚡ How Salesforce Delivers Reliable, Low-Latency AI Inference
⚖️ Is GPT-5 really worse than GPT-4o? Ars puts them to the test.
🚨 MCP Vulnerabilities Every Developer Should Know
🐍 Tiny Agents in Python: a MCP-powered agent in ~70 lines of code
🛒 Building an AI-Powered E-commerce Chat Assistant with MongoDB

You’ve got the signal—turn it into shipped code.

Have a great week!
FAUN.dev Team

⭐ Patrons

bytevibe.co

🧪💻🎸 Science, Code & Rock 'n' Roll

Made for coders who live on logic and riffs, it’s soft, seamless, and pure 100% cotton.

👉 Spread the word and help developers find you by promoting your projects on FAUN. Get in touch for more information.

ℹ️ News, Updates & Announcements

eweek.com

71% of Americans Say AI Could ‘Put People Out of Work Permanently’

Most Americans now see AI as a threat to their livelihoods, with 71% fearing it could permanently wipe out jobs. The findings come from a new Reuters/Ipsos poll, which shows widespread anxiety across the US as AI threatens job security and challenges the future of employment. The World Economic Forum estimates that 92 million jobs worldwide could be displaced by 2030, but 170 million new ones will be created in their place.

engineering.salesforce.com

How Salesforce Delivers Reliable, Low-Latency AI Inference

Salesforce’s AI Metadata Service (AIMS) just got a serious speed boost. They rolled out a multi-layer cache—L1 on the client, L2 on the server—and cut inference latency from 400ms to under 1ms. That’s over 98% faster.

But it’s not just about speed anymore. L2 keeps responses flowing even when the backend tanks, bumping availability to 65% during failures. Services like Agentforce stay up, even if they’re limping a bit.

theregister.com

AWS CEO says AI replacing junior staff is 'dumbest idea'

AWS CEO Matt Garman isn’t buying the “replace juniors with AI” hype. Says it’s a short game move—and a bad one. Junior devs aren’t just fresh hands on the keyboard. They’re the future bench for deep product know-how and smarter AI integration.

Meanwhile, over 80% of AWS developers are already leaning on AI tools regularly. From writing tests to building agentic workflows, machines are in the loop—and the curve’s still climbing.

arstechnica.com

Is GPT-5 really worse than GPT-4o? Ars puts them to the test.

OpenAI walked back its latest release after users flagged GPT-5 for sounding flat, hallucinating more, and losing creative spark. The fix? Rolling back to the friendlier GPT-4o.

Head-to-head tests told a nuanced story: GPT-5 nailed accuracy and structure across most prompts. But when the task called for style or depth, GPT-4o brought the warmth and richer detail.

engineering.fb.com

Creating AI agent solutions for warehouse data access and security

Meta’s rebuilding its data warehouse access model from the ground up—this time with LLM-powered agents calling the shots.

Two key agents run the show: the data-user agent, which speaks for the person querying, and the data-owner agent, guarding the vault. They negotiate access at query time, weighing signals like intent, behavior, profile, and query shape.

Decisions don’t fly solo. Rule-based guardrails, usage budgets, and tight feedback loops keep it all traceable and constrained.

The bigger play? LLM agents are moving into the infrastructure layer. Access control, intent modeling, and governance—once siloed systems—are now baked right into the stack.

👉 Enjoyed this?Read more news on FAUN.dev/news

🔗 Stories, Tutorials & Articles

composio.dev

MCP Vulnerabilities Every Developer Should Know

MCP’s blowing up across platforms—but the security? Still sketchy.

Think tool description injection. Botched OAuth. Open doors to supply chain attacks. The new MCP 2025-06-18 spec tries to clean house (no token passthrough, mandatory user consent), but most real-world setups either drag their feet or skip safeguards entirely.

The big picture: MCP's racing toward "HTTP for LLMs" status. Problem is, security isn’t keeping up. That speed’s baking in risks straight into model interfaces—quietly, permanently.

forbes.com

Myth Or Reality: Will AI Replace Computer Programmers?

Generative AI tools like GPT-4o and Claude Sonnet now handle the grunt work—fixing bugs, cranking out code, writing docs—with scary accuracy. Amazon and Anthropic are already hinting at hiring fewer engineers. But the jobs aren’t vanishing; they’re mutating.

giansegato.com

Building AI Products In The Probabilistic Era

Modern AI broke the rulebook.

By spitting out stochastic outputs from unbounded inputs, it flipped software dev from a game of precision to one of probability. Old tools—funnels, SLO dashboards, crisp A/B tests—don’t quite fit anymore. They were built for systems that behaved.

Today’s AI stacks move with emergence, ambiguity, and weird surprises. That friction hits everything: prompting UX, infra cost models, even how you ship.

The new game? Design for uncertainty. Measure everything. Learn faster than it breaks.

huggingface.co

Tiny Agents in Python: a MCP-powered agent in ~70 lines of code

A new demo walks through building Tiny Agents in Python—just ~70 lines using the Model Context Protocol (MCP). No boilerplate. Just clean LLM-to-tool hookups with standardized agent configs.

Agents plug into multiple MCP servers out of the box—from local filesystems to Playwright browsers—and handle tool use through a single, OpenAI-style interface.

freecodecamp.org

Building an AI-Powered E-commerce Chat Assistant with MongoDB

freeCodeCamp dropped a new course that walks devs through building an AI-powered shopping agent from scratch. It ties together LangGraph for orchestration, Gemini for reasoning, and MongoDB Atlas as the vector memory layer.

The build covers a Node.js backend, a React frontend, and wires in multi-step agent workflows—complete with custom tools for product search.

manus.im

Context Engineering for AI Agents: Lessons from Building Manus

Failures make great teachers—especially for LLMs.

Stuffing failed attempts right into the prompt helps agents recalibrate. It nudges their internal priors, cuts down on repeat mistakes, and sparks smarter behavior.

👉 Got something to share? Create your FAUN Page and start publishing your blog posts, tools, and updates. Grow your audience, and get discovered by the developer community.

⚙️ Tools, Apps & Software

github.com

simstudioai/sim

Sim is an open-source AI agent workflow builder. Sim's interface is a lightweight, intuitive way to rapidly build and deploy LLMs that connect with your favorite tools.

github.com

karpathy/rendergit

Render any git repo into a single static HTML page for humans or LLMs

github.com

Hexastack/Hexabot

Hexabot is an open-source AI chatbot / agent builder. It allows you to create and manage multi-channel and multilingual chatbots / agents with ease.

github.com

dyad-sh/dyad

Free, local, open-source AI app builder. v0 / lovable / Bolt alternative

👉 Spread the word and help developers find and follow your Open Source project by promoting it on FAUN. Get in touch for more information.

🤔 Did you know?

Did you know that FAISS’s GPU nearest-neighbor search employs a warp-level top-k selector called WarpSelect that keeps all intermediate state in registers and reaches up to 55 % of peak GPU memory bandwidth? Because it never materializes the full distance matrix in high-bandwidth memory and writes only the final top-k, the kernel becomes bandwidth-bound rather than compute-bound. That means retrieval throughput is dictated by index layout and memory traffic—not sorting—so any approach that spills distances to memory or does full global sorts wastes precious GPU cycles.

🤖 Once, SenseiOne Said

"Reproducibility ends at deployment: your training run is deterministic; your users aren't. MLOps exists to manage that contradiction, not bury it under dashboards."

— SenseiOne

(*) SenseiOne is FAUN.dev’s work-in-progress AI agent

👤 This Week's Human

This week, we’re highlighting Ihor Yevtushenko, a DevOps Cloud Engineer in Bern running Yevtushenko DevOps Services. 6x AWS certified (DevOps Pro, Security Specialty) with CKA, he builds Terraform-first AWS platforms, production Kubernetes clusters, and GitOps/CI pipelines with ArgoCD, drawing on hands-on stints at EPAM Systems, HCLTech, Morphean SA, and 42matters.

💡 Engage with FAUN.dev on LinkedIn — like, comment on, or share any of our posts on LinkedIn — you might be our next “This Week’s Human”!

😂 Meme of the week

❤️ Thanks for reading

👋 Keep in touch and follow us on social media:
- 💼LinkedIn
- 📝Medium
- 🐦Twitter
- 👥Facebook
- 📰Reddit
- 📸Instagram

👌 Was this newsletter helpful?
We'd really appreciate it if you could forward it to your friends!

🙏 Never miss an issue!
To receive our future emails in your inbox, don't forget to add community@faun.dev to your contacts.

🤩 Want to sponsor our newsletter?
Reach out to us at sponsors@faun.dev and we'll get back to you as soon as possible.

Kala #491: Code a MCP-powered Agent in ~70 Lines of Code
Legend: ✅ = Editor's Choice / ♻️ = Old but Gold / ⭐ = Promoted / 🔰 = Beginner Friendly

You received this email because you are subscribed to FAUN.dev.
We (🐾) help developers (👣) learn and grow by keeping them up with what matters.

You can manage your subscription options here (recommended) or use the old way here (legacy). If you have any problem, read this or reply to this email.