TLDR

TLDR Dev 2026-07-27

Claude Opus 5 🚀, new context engineering rules 🏛, life of a Codex conversation 💬

AI hallucinating? Don't blame your RAG pipeline, blame your document parser (Sponsor)

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Articles & Tutorials

The new rules of context engineering for Claude 5 generation models (11 minute read)

Session revocations at scale (12 minute read)

The life of a Codex conversation on disk (20 minute read)

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Opinions & Advice

A shell colon does nothing. Use it anyway (6 minute read)

How to structure a log (10 minute read)

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Launches & Tools

Introducing Claude Opus 5 (10 minute read)

Instatic (GitHub Repo)

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Miscellaneous

Memory-level parallelism: AMD is the king (6 minute read)

Modeling Facts and Reactions with Domain Events (9 minute read)

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Quick Links

Kill the Cookie Banner (3 minute read)

Design is compromise (2 minute read)

Drone-Bench (13 minute read)

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