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AgentsInternals
Coding agent harness: what I learned by cracking open Codex, OpenCode and Pi
Coding agents differ not by model but by the architectural bets of the harness. Reading the source of Codex, OpenCode, Pi and my own agent to tell load-bearing bets from ones you write to delete.
July 17, 2026
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InternalsPractice
Why one character breaks the cache: prompt caching under the hood
June 26, 2026
AgentsBasis
02Prompt Caching: The Optimization That Fails Silently
Prompt caching cuts input token costs by 10x and keeps agent unit economics afloat, yet it breaks without a single error...
June 10, 2026
AgentsIndustry
03AI Engineer World's Fair 2026: A Read of the Talks and Where AI Engineering Is Heading
Watching 560 sessions live is impossible, so I ran the available recordings through an agent pipeline. Inside: why almos...
July 03, 2026
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