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#debugging

Troubleshooting code issues

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CrashLoopBackOff: five causes and how to tell them apart

CrashLoopBackOff: five causes and how to tell them apart

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7 min read
The Exit Code That Lied: Debugging a Silent Failure on a Free Server

The Exit Code That Lied: Debugging a Silent Failure on a Free Server

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5 min read
'u' Replaced By 'U' Is A Big Error,Insight From My On Going Spring Boot Project

'u' Replaced By 'U' Is A Big Error,Insight From My On Going Spring Boot Project

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2 min read
Five Wrong Root Causes, and the Fifth Was in the Post

Five Wrong Root Causes, and the Fifth Was in the Post

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4 min read
The Ownership Gap: Why AI Workflow Failures Sit Unfixed for Weeks

The Ownership Gap: Why AI Workflow Failures Sit Unfixed for Weeks

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7 min read
Make Retry Idempotency an Invariant Before You Move a Batch Job to a Free Model Endpoint

Make Retry Idempotency an Invariant Before You Move a Batch Job to a Free Model Endpoint

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5 min read
CoreText said 59 points, the Chinese caption needed 71, and the export "succeeded" blank

CoreText said 59 points, the Chinese caption needed 71, and the export "succeeded" blank

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4 min read
I gave my AI agent a safety rule. It quietly stopped shipping for four days.

I gave my AI agent a safety rule. It quietly stopped shipping for four days.

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4 min read
Filter-After-Slice: The Bug That Quietly Broke Our Deduplication Window

Filter-After-Slice: The Bug That Quietly Broke Our Deduplication Window

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4 min read
Windows silently stops delivering WH_KEYBOARD_LL hook events when a Chromium window has focus (and the diagnostic hook hides it)

Windows silently stops delivering WH_KEYBOARD_LL hook events when a Chromium window has focus (and the diagnostic hook hides it)

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3 min read
The bug was in the colour space, not the parser

The bug was in the colour space, not the parser

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2 min read
Your Worker Returned 500 and the Log Says `outcome: "ok"`

Your Worker Returned 500 and the Log Says `outcome: "ok"`

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5 min read
The Vanished Constraint: Debugging a Coding Agent That Forgot Its Own Decision

The Vanished Constraint: Debugging a Coding Agent That Forgot Its Own Decision

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4 min read
"V cache quantization requires flash_attn" — the llama.cpp error that quietly halves your context window

"V cache quantization requires flash_attn" — the llama.cpp error that quietly halves your context window

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10 min read
Debugging Legacy Bottlenecks with AI: A Systematic Workflow for Complex Codebases

Debugging Legacy Bottlenecks with AI: A Systematic Workflow for Complex Codebases

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7 min read
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