03 — posts

#context engineering

07/26/2026AI

Context Engineering – your frontmatter is the starting point

Context engineering in practice: how structured frontmatter metadata from Astro content collections becomes a precise, budgeted context source for an LLM – with TypeScript examples instead of naive full-text search.

#tutorial
#context engineering
#prompting
#ai
#llm

07/26/2026AI

Why I dropped vector search for my wiki

Vector search is the default for RAG – but for my personal wiki, structured retrieval over metadata and full text was the better choice. Where embeddings fail, with SQL and prompt examples.

#context engineering
#rag
#retrieval
#ai
#llm

04/20/2026AI

LLM wiki à la Karpathy – context engineering in practice

Context engineering as a concept: a personal, growing wiki as a local context source for LLM queries – structured instead of naive vector search.