context-engineering
6 posts — newest first.
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340 of the Top 1,000 GitHub Repos Ship an AGENTS.md. I Linted Them.
A third of the most-starred repos carry agent instructions. What's in them, what research says belongs there, and why my linter was wrong at first.
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What a Token Actually Is, and Why a UUID Costs 24 of Them
I built a BPE tokenizer from scratch, then measured what JSON, UUIDs, code and other languages really cost. The len/4 estimate was off by up to 70%.
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Compaction is a reliability event, and you are not measuring it
New research on long-horizon agents finds context compression degrades execution, not knowledge. Treat every compaction as a state transition and instrument it.
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The Five Types of Agentic Memory (and When to Use Each)
Agentic memory is five things — working, episodic, semantic, procedural, entity — each with its own storage, eviction, and failure mode. A decision guide.
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OKF: The Missing Context Layer for AI Agents
The Open Knowledge Format gives agents a structured vocabulary for what data they're touching and where it came from — auditable, not blind, reasoning.
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Context engineering: the window is a budget, not a bucket
The context window is your agent's working memory, not a junk drawer. Four operations — write, select, compress, isolate — and a token budget you allocate.