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#debugging

Troubleshooting code issues

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My rate limiter told callers to come back at a time it would refuse them

My rate limiter told callers to come back at a time it would refuse them

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Comments
6 min read
My NestJS app "hung" on startup and printed nothing - it was dead all along

My NestJS app "hung" on startup and printed nothing - it was dead all along

Comments 4
4 min read
Why Your MQTT TLS Connection Fails, Stage by Stage

Why Your MQTT TLS Connection Fails, Stage by Stage

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6 min read
A URL Is Not a Development Loop

A URL Is Not a Development Loop

Comments
4 min read
My checker blamed the other tool, and the defect was in the one doing the blaming

My checker blamed the other tool, and the defect was in the one doing the blaming

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Comments 2
3 min read
Debugging the Black Box: Why Session Replay, Error Tracking, and Structured Logs Are the Missing Observability Layer for Production AI Agents

Debugging the Black Box: Why Session Replay, Error Tracking, and Structured Logs Are the Missing Observability Layer for Production AI Agents

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13 min read
TestFly Part 14: Step traces with per-step ARIA/DOM snapshots for visual debugging

TestFly Part 14: Step traces with per-step ARIA/DOM snapshots for visual debugging

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4 min read
My privacy scan found 412 leaks. 374 of them were one line of my own tooling.

My privacy scan found 412 leaks. 374 of them were one line of my own tooling.

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Comments 1
3 min read
The measurement in my permanent log was a string literal

The measurement in my permanent log was a string literal

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Comments 1
3 min read
My negative test stopped being negative when a config file grew by four rows

My negative test stopped being negative when a config file grew by four rows

Comments 1
3 min read
Two tools disagreed 67 times, and the checker was wrong in all 67

Two tools disagreed 67 times, and the checker was wrong in all 67

1
Comments 1
3 min read
All 23 of my line-number citations were wrong, and the coverage check could not notice

All 23 of my line-number citations were wrong, and the coverage check could not notice

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Comments 1
3 min read
推理链的黑箱拆解

推理链的黑箱拆解

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3 min read
推理链的黑箱拆解

推理链的黑箱拆解

Comments
3 min read
My Copy Buttons Vanished on Production. The Bug Was Three WordPress Layers Deep

My Copy Buttons Vanished on Production. The Bug Was Three WordPress Layers Deep

Comments 1
4 min read
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