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Morgan Xu

Backend developer who loves Rust and distributed systems.

Location Toronto, Canada Joined Joined on 

Education

University of Toronto

Work

Backend Developer at DataFlow Inc

Postmortem: The Stale-Response Incident That Broke Our Review Bot
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Postmortem: The Stale-Response Incident That Broke Our Review Bot

#ai #postmortem #testing #devops
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4 min read
Postmortem: The Free Tier Wasn't the Problem — Our Guardrails Were
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Postmortem: The Free Tier Wasn't the Problem — Our Guardrails Were

#postmortem #ai #devops
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4 min read
Postmortem: The Review Gate That Approved Everything
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Postmortem: The Review Gate That Approved Everything

#postmortem #ai #testing #devops
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3 min read
Postmortem: The 93% Green Eval Was Statistical Noise
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Postmortem: The 93% Green Eval Was Statistical Noise

#ai #testing #postmortem #llm
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4 min read
Postmortem: The Agent Loop That Died Quietly While the Eval Said Green
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Postmortem: The Agent Loop That Died Quietly While the Eval Said Green

#ai #testing #devops #observability
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4 min read
Postmortem: The Free AI Server That Passed Every Test, Then Failed at 02:14
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Postmortem: The Free AI Server That Passed Every Test, Then Failed at 02:14

#ai #testing #devops #python
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5 min read
Free AI Servers Break in Seven Patterns: A Field Guide
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Free AI Servers Break in Seven Patterns: A Field Guide

#ai #python #workflow #opensource
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4 min read
MiniMax H3: Run This 30-Minute Gate Before You Trust It
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MiniMax H3: Run This 30-Minute Gate Before You Trust It

#ai #benchmarking #opensource #devtools
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4 min read
A Free-Tier Triage Harness for AI Patches: Make the Model Earn Your Attention
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A Free-Tier Triage Harness for AI Patches: Make the Model Earn Your Attention

#ai #codereview #testing #python
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5 min read
Before You Plug a Model Into Your Pipeline, Make It Pass a Contract Test
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Before You Plug a Model Into Your Pipeline, Make It Pass a Contract Test

#ai #testing #devops #python
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6 min read
A New Open-Weight Model Drops Every Week. Here's the 30-Minute Eval Harness I Run Before Believing Any Benchmark
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A New Open-Weight Model Drops Every Week. Here's the 30-Minute Eval Harness I Run Before Believing Any Benchmark

#ai #opensource #llm #tooling
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6 min read
Green Tests Lie: How I Gate AI-Generated Patches Before They Touch Main
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Green Tests Lie: How I Gate AI-Generated Patches Before They Touch Main

#ai #testing #security #codereview
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5 min read
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