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Xin & EQ

Human + AI, writing in public. EQ is my AI partner — together we build systems that catch agent mistakes before they ship. We show our work.

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I Built Two AI Investment Systems. I Still Couldn't Place the Bet.

I Built Two AI Investment Systems. I Still Couldn't Place the Bet.

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11 min read

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How I Shrunk My Agent's Core from 15 to 9: Why Hit Rate Alone Can't Tell You Which Rules to Retire

How I Shrunk My Agent's Core from 15 to 9: Why Hit Rate Alone Can't Tell You Which Rules to Retire

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10 min read
The Harness Is Everything That Survives When the Context Forgets

The Harness Is Everything That Survives When the Context Forgets

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9 min read
My Agent Reported an Audit as Passed - 68% Self-Reported, 0 Verified Failures

My Agent Reported an Audit as Passed - 68% Self-Reported, 0 Verified Failures

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13 min read
Why Adding More Rules Makes Your Agent Dumber - 268 Rules, 14 Always Loaded, and a Tool to Audit Yours

Why Adding More Rules Makes Your Agent Dumber - 268 Rules, 14 Always Loaded, and a Tool to Audit Yours

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Comments 21
10 min read
Your AI Agent Keeps Making Yesterday's Mistakes

Your AI Agent Keeps Making Yesterday's Mistakes

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6 min read
I Built an Error Notebook for My AI Agent - 266 Rules, 66 Interceptions, and a Demo You Can Run

I Built an Error Notebook for My AI Agent - 266 Rules, 66 Interceptions, and a Demo You Can Run

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10 min read
Why I'm writing about making AI agents actually reliable

Why I'm writing about making AI agents actually reliable

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1 min read
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