Jens Fischer
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Knowledge
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Tech
Awesome List
A curated list of tools and resources, mostly open source.
Agentic Stack
The layers that show up when building an agent application.
AI Design
Product and UX patterns for shipping AI features.
Budgets
LLM cost management without spending evenings on dashboards.
Build vs Buy
When to call an API, when to use a framework, when to host your own model.
Claude Code
Context
Context engineering. What goes in the prompt and what stays out.
Evals
How to know an AI feature actually works.
Failure Modes
A running list of how AI applications break in production.
Generative UI
When it's worth letting the model pick or render UI, and when a static template is fine.
LangChain
My take on LangChain.
LangGraph
State-graph orchestration for agent workflows.
LangSmith
LangChain's observability and eval platform.
MCP
Model Context Protocol. A standard for connecting tools and data to LLM clients.
Models
How to pick a model.
Prompting
The handful of prompting moves that actually matter.
RAG
Retrieval-augmented generation. When it's worth the trouble.
Routing
Picking the right model for each step.
Security
Prompt injection and the small handful of defenses that actually help.
Streaming UX
The UX patterns that make a slow model feel fast.
Team Workflows
How engineering teams actually use AI day-to-day.
Tool Use
Function calling. Making it actually work.
Bruno
DevToys
A curated list of tools and resources, mostly open source.
.dotfiles
There's no place like $HOME.
Neovim
Raycast
A mac productivity tool for application shortcuts and window management.
TablePlus
Tmux
Zen
Code Reviews