Articles

Notes from building real things

Web, React and Next.js, AI and RAG, and mobile. Written from production work, not tutorials about tutorials.

Context Rot Is Killing Your Long-Running Agent: A Compaction Playbook That Survives 100k+ Tokens

Long-running agents do not fail because they run out of tokens. They fail because accuracy drops as the context grows. Here is the compaction playbook I use to keep agents reliable past 100k tokens: trigger-based compaction, anchored iterative summarization, per-tool context feedback, and offloading state to external memory.

Jun 29, 2026· 9 min read

agentscontext engineeringcompaction

Agents in Production

Claude Opus 4.8 Dynamic Workflows: How to Run Hundreds of Parallel Subagents Without Burning Your Budget

Opus 4.8 makes hundreds of parallel subagents practical for codebase-scale work. Here is how I scope the fan-out, why the verification gate matters more than the model, and a real token and cost model with the fast mode that runs roughly 3x cheaper, plus where it overspends.

Jun 15· 9 min read

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