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@youssefh.skystack.xyz
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Mastering Data Science & AI—Beyond the Basics This is an automated Substack Account of youssefh.substack.com Discover more/Create at: @skystack.xyz

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To Data & Beyond @youssefh.skystack.xyz · 26/09/2026
Jev Clearly Explained: I Built a Decision Layer for an AI Agent • A hands-on test of Jev’s typed decisions, probability outputs, latency, and failure modes inside an agent-style workflow.
todatabeyond.substack.com
Jev Clearly Explained: I Built a Decision Layer for an AI Agent
A hands-on test of Jev’s typed decisions, probability outputs, latency, and failure modes inside an agent-style workflow.
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To Data & Beyond @youssefh.skystack.xyz · 20/09/2026
I Fused 3 Tiny Local LLMs on My Laptop to See If They Could Match GPT-5.6 • A hands-on experiment with MLX, three quantized Qwen models, and 24 scheduling problems — with runnable code, token traces, and measured results.
todatabeyond.substack.com
I Fused 3 Tiny Local LLMs on My Laptop to See If They Could Match GPT-5.6
A hands-on experiment with MLX, three quantized Qwen models, and 24 scheduling problems — with runnable code, token traces, and measured results.
001
To Data & Beyond @youssefh.skystack.xyz · 15/09/2026
New Workshop: Building Multi-Agent Deep Search Systems from Scratch+ 20% Early Bird Discount • Announcing my new workshop + Special Discount for Paid Subscribers
todatabeyond.substack.com
New Workshop: Building Multi-Agent Deep Search Systems from Scratch+ 20% Early Bird Discount
Announcing my new workshop + Special Discount for Paid Subscribers
020
To Data & Beyond @youssefh.skystack.xyz · 12/09/2026
Context Engineering for AI Agents 101: Concepts, Implementation, and Evaluation • How to design, build, and evaluate what your agent actually sees.
todatabeyond.substack.com
Context Engineering for AI Agents 101: Concepts, Implementation, and Evaluation
How to design, build, and evaluate what your agent actually sees.
000
To Data & Beyond @youssefh.skystack.xyz · 07/09/2026
New book: Hands-On LangChain — 20% Early Bird Discount + 50% Discount for Paid Subscribers
todatabeyond.substack.com
New book: Hands-On LangChain — 20% Early Bird Discount + 50% Discount for Paid Subscribers
000
To Data & Beyond @youssefh.skystack.xyz · 05/09/2026
Loops vs. Graphs for AI Coding Agents, Clearly Explained • Four isolated coding agents, one integration failure, and a graph that retries only the branch that owns it.
todatabeyond.substack.com
Loops vs. Graphs for AI Coding Agents, Clearly Explained
Four isolated coding agents, one integration failure, and a graph that retries only the branch that owns it.
000
To Data & Beyond @youssefh.skystack.xyz · 02/09/2026
My first live cohort: Master Claude Ecosystem • Announcing my First Live Course + 20% Early Bird Discount
todatabeyond.substack.com
My first live cohort: Master Claude Ecosystem
Announcing my First Live Course + 20% Early Bird Discount
000
To Data & Beyond @youssefh.skystack.xyz · 29/08/2026
Last Chance: 4 Seats Left for Tomorrow’s Context Engineering Workshop
todatabeyond.substack.com
Last Chance: 4 Seats Left for Tomorrow’s Context Engineering Workshop
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To Data & Beyond @youssefh.skystack.xyz · 28/08/2026
Evaluating Context Engineering for AI Agents: How to Measure What the Model Sees • Testing Write, Select, Compress, and Isolate in the Claude Agent SDK Deep Search Agent
todatabeyond.substack.com
Evaluating Context Engineering for AI Agents: How to Measure What the Model Sees
Testing Write, Select, Compress, and Isolate in the Claude Agent SDK Deep Search Agent
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To Data & Beyond @youssefh.skystack.xyz · 26/08/2026
12 seats left for the Context Engineering workshop
todatabeyond.substack.com
12 seats left for the Context Engineering workshop
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To Data & Beyond @youssefh.skystack.xyz · 24/08/2026
Inside DeepSeek’s 170K+ Stars Open-Source Agent Harness • Five reliability patterns from a repository with 170K+ GitHub stars in its first week
todatabeyond.substack.com
Inside DeepSeek’s 170K+ Stars Open-Source Agent Harness
Five reliability patterns from a repository with 170K+ GitHub stars in its first week
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To Data & Beyond @youssefh.skystack.xyz · 20/08/2026
Context Engineering in Practice: Building a Production AI Agent with the Claude Agent SDK • Implementing Write, Select, Compress, and Isolate in a progressively improved technical research agent
todatabeyond.substack.com
Context Engineering in Practice: Building a Production AI Agent with the Claude Agent SDK
Implementing Write, Select, Compress, and Isolate in a progressively improved technical research agent
001
To Data & Beyond @youssefh.skystack.xyz · 18/08/2026
Agent Skills 101 Course is Live + 30% Early Bird Discount
todatabeyond.substack.com
Agent Skills 101 Course is Live + 30% Early Bird Discount
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To Data & Beyond @youssefh.skystack.xyz · 15/08/2026
Building Agent Skills for Claude Code Workshop — Only 5 Seats Left
todatabeyond.substack.com
Building Agent Skills for Claude Code Workshop — Only 5 Seats Left
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To Data & Beyond @youssefh.skystack.xyz · 14/08/2026
From Prompting to Loops to Graphs: How AI Agent Workflows Evolve • Graph Engineering for AI Agents: When a Loop Becomes a Workflow
todatabeyond.substack.com
From Prompting to Loops to Graphs: How AI Agent Workflows Evolve
Graph Engineering for AI Agents: When a Loop Becomes a Workflow
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To Data & Beyond @youssefh.skystack.xyz · 09/08/2026
Context Engineering for AI Agents: Concepts, Failure Modes, and Core Strategies • The Foundations of Context Engineering for AI Agents
todatabeyond.substack.com
Context Engineering for AI Agents: Concepts, Failure Modes, and Core Strategies
The Foundations of Context Engineering for AI Agents
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To Data & Beyond @youssefh.skystack.xyz · 06/08/2026
Two Live Workshops in August: Agent Skills and Context Engineering + 30% Early Bird Discounts
todatabeyond.substack.com
Two Live Workshops in August: Agent Skills and Context Engineering + 30% Early Bird Discounts
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To Data & Beyond @youssefh.skystack.xyz · 05/08/2026
How to Run Kimi K3 Locally Without Terabytes of RAM • Three practical methods: use a bounded-memory C99 engine, run a Rust full-checkpoint runtime, or reduce the model to Unsloth’s 594 GB dynamic 1-bit GGUF.
todatabeyond.substack.com
How to Run Kimi K3 Locally Without Terabytes of RAM
Three practical methods: use a bounded-memory C99 engine, run a Rust full-checkpoint runtime, or reduce the model to Unsloth’s 594 GB dynamic 1-bit GGUF.
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To Data & Beyond @youssefh.skystack.xyz · 29/07/2026
Engineering Reliable Coding Agent Loops: Control Flow, Verification, Retries, and Stop Conditions • How to supervise long-running coding work with explicit contracts, verification, retries, and stopping conditions.
todatabeyond.substack.com
Engineering Reliable Coding Agent Loops: Control Flow, Verification, Retries, and Stop Conditions
How to supervise long-running coding work with explicit contracts, verification, retries, and stopping conditions.
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To Data & Beyond @youssefh.skystack.xyz · 27/07/2026
Only 5 Seat Left - Hands-On Loop Engineering with Claude • Learn How to Use Claude loop to automate repetitive tasks
todatabeyond.substack.com
Only 5 Seat Left - Hands-On Loop Engineering with Claude
Learn How to Use Claude loop to automate repetitive tasks
000
To Data & Beyond @youssefh.skystack.xyz · 24/07/2026
Only 10 Seat Left - Hands-On Loop Engineering with Claude • Learn How to Use Claude loop to automate repetitive tasks
todatabeyond.substack.com
Only 10 Seat Left - Hands-On Loop Engineering with Claude
Learn How to Use Claude loop to automate repetitive tasks
000
To Data & Beyond @youssefh.skystack.xyz · 21/07/2026
Only 15 Seat Left - Hands-On Loop Engineering with Claude • Learn How to Use Claude loop to automate repetitive tasks
todatabeyond.substack.com
Only 15 Seat Left - Hands-On Loop Engineering with Claude
Learn How to Use Claude loop to automate repetitive tasks
000
To Data & Beyond @youssefh.skystack.xyz · 19/07/2026
Build Persistent Agents with Hermes Agent Course- 24h Left on 30% Launch Discount • A practical course on persistent agents, memory, skills, and real workflows — with 30% off during launch week + 50% off for paid subscribers
todatabeyond.substack.com
Build Persistent Agents with Hermes Agent Course- 24h Left on 30% Launch Discount
A practical course on persistent agents, memory, skills, and real workflows — with 30% off during launch week + 50% off for paid subscribers
000
To Data & Beyond @youssefh.skystack.xyz · 18/07/2026
Build Persistent Agents with Hermes Agent Course- 24h Left on 30% Launch Discount • A practical course on persistent agents, memory, skills, and real workflows — with 30% off during launch week + 50% off for paid subscribers
todatabeyond.substack.com
Build Persistent Agents with Hermes Agent Course- 24h Left on 30% Launch Discount
A practical course on persistent agents, memory, skills, and real workflows — with 30% off during launch week + 50% off for paid subscribers
000
To Data & Beyond @youssefh.skystack.xyz · 13/07/2026
I Used MyClaw to Build a Research Assistant That Sends Me Updates on Telegram • Most AI tools wait for prompts. I tested whether MyClaw could run a recurring research workflow and send useful updates before I asked.
todatabeyond.substack.com
I Used MyClaw to Build a Research Assistant That Sends Me Updates on Telegram
Most AI tools wait for prompts. I tested whether MyClaw could run a recurring research workflow and send useful updates before I asked.
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To Data & Beyond @youssefh.skystack.xyz · 11/07/2026
New Live Workshop: Hands-On Loop Engineering with Claude
todatabeyond.substack.com
New Live Workshop: Hands-On Loop Engineering with Claude
000
To Data & Beyond @youssefh.skystack.xyz · 08/07/2026
New Course: Build Persistent Agents with Hermes Agent • A practical course on persistent agents, memory, skills, and real workflows — with 30% off during launch week + 50% off for paid subscribers
todatabeyond.substack.com
New Course: Build Persistent Agents with Hermes Agent
A practical course on persistent agents, memory, skills, and real workflows — with 30% off during launch week + 50% off for paid subscribers
000
To Data & Beyond @youssefh.skystack.xyz · 03/07/2026
Hermes Agent 101: A Practical Guide to Persistent and Self-Improving Agents • How Nous Research’s Hermes Agent turns the idea of an AI assistant into a long-running agent that remembers, learns skills, and works across tools
todatabeyond.substack.com
Hermes Agent 101: A Practical Guide to Persistent and Self-Improving Agents
How Nous Research’s Hermes Agent turns the idea of an AI assistant into a long-running agent that remembers, learns skills, and works across tools
010
To Data & Beyond @youssefh.skystack.xyz · 29/06/2026
Hands-On Hermes Agent Workshop - Only 5 Seats Left • Hands-On Hermes Agent: Persistent Agents, Memory, Skills, and Real Workflows
todatabeyond.substack.com
Hands-On Hermes Agent Workshop - Only 5 Seats Left
Hands-On Hermes Agent: Persistent Agents, Memory, Skills, and Real Workflows
000
To Data & Beyond @youssefh.skystack.xyz · 26/06/2026
Hands-On Hermes Agent Workshop - Only 10 Seats Left • Hands-On Hermes Agent: Persistent Agents, Memory, Skills, and Real Workflows
todatabeyond.substack.com
Hands-On Hermes Agent Workshop - Only 10 Seats Left
Hands-On Hermes Agent: Persistent Agents, Memory, Skills, and Real Workflows
000
To Data & Beyond @youssefh.skystack.xyz · 24/06/2026
How to Create Loops with Claude: A Practical Guide to Agentic Automation • Claude Loop Engineering: How to Design Agents That Iterate, Verify, and Remember
todatabeyond.substack.com
How to Create Loops with Claude: A Practical Guide to Agentic Automation
Claude Loop Engineering: How to Design Agents That Iterate, Verify, and Remember
000
To Data & Beyond @youssefh.skystack.xyz · 22/06/2026
Hands-On Hermes Agent Workshop - Only 15 Seats Left • Hands-On Hermes Agent: Persistent Agents, Memory, Skills, and Real Workflows
todatabeyond.substack.com
Hands-On Hermes Agent Workshop - Only 15 Seats Left
Hands-On Hermes Agent: Persistent Agents, Memory, Skills, and Real Workflows
000
To Data & Beyond @youssefh.skystack.xyz · 21/06/2026
Google Published a Paper That Might End the Transformer-Only LLM Era • Memory Caching gives RNNs a growing memory, offering a middle ground between efficient recurrence and expensive full attention.
todatabeyond.substack.com
Google Published a Paper That Might End the Transformer-Only LLM Era
Memory Caching gives RNNs a growing memory, offering a middle ground between efficient recurrence and expensive full attention.
000
To Data & Beyond @youssefh.skystack.xyz · 16/06/2026
Join the Hands-On Hermes Agent Workshop • Hands-On Hermes Agent: Persistent Agents, Memory, Skills, and Real Workflows
todatabeyond.substack.com
Join the Hands-On Hermes Agent Workshop
Hands-On Hermes Agent: Persistent Agents, Memory, Skills, and Real Workflows
000
To Data & Beyond @youssefh.skystack.xyz · 15/06/2026
New Course: Claude Cowork 101 - From Prompts to Deliverables & Automated Workflows
todatabeyond.substack.com
New Course: Claude Cowork 101 - From Prompts to Deliverables & Automated Workflows
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To Data & Beyond @youssefh.skystack.xyz · 13/06/2026
Claude Cowork 101: From Prompts to Deliverables & Automated Workflows • Hands on Claude Cowork - From Essintal settings to Building Workflows
todatabeyond.substack.com
Claude Cowork 101: From Prompts to Deliverables & Automated Workflows
Hands on Claude Cowork - From Essintal settings to Building Workflows
000
To Data & Beyond @youssefh.skystack.xyz · 10/06/2026
Hands-On Claude Cowork: From Prompts to Deliverables & Automated Workflows — 5 Seats Left • Learn how to use Claude Cowork to delegate real tasks, organize files, connect your tools, and build recurring workflows that run without you.
todatabeyond.substack.com
Hands-On Claude Cowork: From Prompts to Deliverables & Automated Workflows — 5 Seats Left
Learn how to use Claude Cowork to delegate real tasks, organize files, connect your tools, and build recurring workflows that run without you.
000
To Data & Beyond @youssefh.skystack.xyz · 09/06/2026
What a Real Production Gen AI Folder Architecture Looks Like • A practical breakdown of the folders, files, and boundaries that usually appear once a Gen AI application has to survive production
todatabeyond.substack.com
What a Real Production Gen AI Folder Architecture Looks Like
A practical breakdown of the folders, files, and boundaries that usually appear once a Gen AI application has to survive production
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To Data & Beyond @youssefh.skystack.xyz · 08/06/2026
Hands-On Claude Cowork: From Prompts to Deliverables & Automated Workflows — 10 Seats Left • Learn how to use Claude Cowork to delegate real tasks, organize files, connect your tools, and build recurrin
todatabeyond.substack.com
Hands-On Claude Cowork: From Prompts to Deliverables & Automated Workflows — 10 Seats Left
Learn how to use Claude Cowork to delegate real tasks, organize files, connect your tools, and build recurrin
000
To Data & Beyond @youssefh.skystack.xyz · 05/06/2026
The 6 Claude Code Skills I Would Use for Real Projects • The 6 Claude Code Skills I Would Install First
todatabeyond.substack.com
The 6 Claude Code Skills I Would Use for Real Projects
The 6 Claude Code Skills I Would Install First
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To Data & Beyond @youssefh.skystack.xyz · 01/06/2026
Hands-On Claude Cowork: From Prompts to Deliverables & Automated Workflows — 15 Seats Left • Learn how to use Claude Cowork to delegate real tasks, organize files, connect your tools, and build recurring workflows that run without you.
todatabeyond.substack.com
Hands-On Claude Cowork: From Prompts to Deliverables & Automated Workflows — 15 Seats Left
Learn how to use Claude Cowork to delegate real tasks, organize files, connect your tools, and build recurring workflows that run without you.
000
To Data & Beyond @youssefh.skystack.xyz · 31/05/2026
Why Half the Experts in an MoE Model May Not Be Needed • Teaching MoE Models When Not to Think: A Simple Explanation of ZEDA
todatabeyond.substack.com
Why Half the Experts in an MoE Model May Not Be Needed
Teaching MoE Models When Not to Think: A Simple Explanation of ZEDA
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To Data & Beyond @youssefh.skystack.xyz · 30/05/2026
I bundled my 7 crash courses with 60% off • Get All My 7 Courses, One Button Away With 60% Off
todatabeyond.substack.com
I bundled my 7 crash courses with 60% off
Get All My 7 Courses, One Button Away With 60% Off
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To Data & Beyond @youssefh.skystack.xyz · 28/05/2026
According to Anthropic’s Engineer, HTML is the New Markdown for AI Agents • Why HTML is becoming the better default for AI-generated reports, reviews, and working surfaces.
todatabeyond.substack.com
According to Anthropic’s Engineer, HTML is the New Markdown for AI Agents
Why HTML is becoming the better default for AI-generated reports, reviews, and working surfaces.
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To Data & Beyond @youssefh.skystack.xyz · 27/05/2026
New Live Workshop: Hands-On Claude Cowork: From Prompts to Deliverables & Automated Workflows • Learn how to use Claude Cowork to delegate real tasks, organize files, connect your tools, and build recurring workflows that run without you.
todatabeyond.substack.com
New Live Workshop: Hands-On Claude Cowork: From Prompts to Deliverables & Automated Workflows
Learn how to use Claude Cowork to delegate real tasks, organize files, connect your tools, and build recurring workflows that run without you.
000
To Data & Beyond @youssefh.skystack.xyz · 25/05/2026
Building Deep Search Agent From Scratch — Step by Step Guide [1/12] • ParFraming the Problem: Why deep search matters, the limits of normal search and basic RAG, and what makes deep search different.
todatabeyond.substack.com
Building Deep Search Agent From Scratch — Step by Step Guide [1/12]
ParFraming the Problem: Why deep search matters, the limits of normal search and basic RAG, and what makes deep search different.
000
To Data & Beyond @youssefh.skystack.xyz · 21/05/2026
I Built Claude OS — A System That Turns Claude into an Execution Engine • A GitHub repo with 100+ commands, MCP servers, plugins, workflows, and agent frameworks — all in one place.
todatabeyond.substack.com
I Built Claude OS — A System That Turns Claude into an Execution Engine
A GitHub repo with 100+ commands, MCP servers, plugins, workflows, and agent frameworks — all in one place.
000
To Data & Beyond @youssefh.skystack.xyz · 21/05/2026
The Designing Multi-Agent Deep Search Systems recording is now available + 50% Discount Till End of May
todatabeyond.substack.com
The Designing Multi-Agent Deep Search Systems recording is now available + 50% Discount Till End of May
010
To Data & Beyond @youssefh.skystack.xyz · 15/05/2026
Designing Multi-Agent Deep Search Systems - 5 Seats Left • A Practical Architecture Workshop for Planning, Tool Use, Validation, Merging
todatabeyond.substack.com
Designing Multi-Agent Deep Search Systems - 5 Seats Left
A Practical Architecture Workshop for Planning, Tool Use, Validation, Merging
010
To Data & Beyond @youssefh.skystack.xyz · 14/05/2026
DeepSeek V4+ Turbovec + RAG: Better OCR & Self-Hosted
todatabeyond.substack.com
DeepSeek V4+ Turbovec + RAG: Better OCR & Self-Hosted
000