14 articles

📰 Dev.to · Wu Long

Articles from Dev.to · Wu Long · 14 articles · Updated every 3 hours · View all reads

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The Tool Parameter Your LLM Should Never See
Dev.to · Wu Long 1d ago
The Tool Parameter Your LLM Should Never See
How exposing an internal runtime enum to the model creates a self-reinforcing spawn failure.
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The Compaction That Only Fires Once
Dev.to · Wu Long 2d ago
The Compaction That Only Fires Once
Here's a fun one: your agent compresses its context window, drops from 137k tokens to 20k, everything...
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Your Agent Called the Wrong Agent — On Purpose
Dev.to · Wu Long 3d ago
Your Agent Called the Wrong Agent — On Purpose
You set up thirteen agents. You drew careful boundaries: coaching team over here, SaaS team over...
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Two Channels, One Brain, Zero Isolation
Dev.to · Wu Long 3d ago
Two Channels, One Brain, Zero Isolation
Here's a fun failure mode: your agent is happily processing a WhatsApp message when a Telegram event...
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The 429 That Poisoned Every Fallback
Dev.to · Wu Long 4d ago
The 429 That Poisoned Every Fallback
Your agent has a fallback chain: GPT-5.4 → DeepSeek → Gemini Flash. GPT-5.4 hits a 429 rate limit. No...
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The One Parameter That Broke Every GPT-5 Call
Dev.to · Wu Long 4d ago
The One Parameter That Broke Every GPT-5 Call
You upgrade your model to GPT-5.2. Every single request returns a 400 error. Your agent retries, hits...
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The Silent Freeze: When Your Model Runs Out of Credits Mid-Conversation
Dev.to · Wu Long 5d ago
The Silent Freeze: When Your Model Runs Out of Credits Mid-Conversation
You're chatting with your agent. It's been helpful all day. You send another message and... nothing....
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Invisible Characters, Visible Damage
Dev.to · Wu Long 6d ago
Invisible Characters, Visible Damage
There's a special kind of bug that only exists because two pieces of code disagree about what a...
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The Image Your Agent Made But Nobody Saw
Dev.to · Wu Long 6d ago
The Image Your Agent Made But Nobody Saw
Your agent generates a beautiful image. The tool returns success. The model writes a cheerful "Here's...
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Your Agent Lied About Running the Code
Dev.to · Wu Long 1w ago
Your Agent Lied About Running the Code
A user ran a simple prompt: write a Python script that reads a CSV and outputs basic statistics. The...
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When /pair approve Bypasses the Scope Guard
Dev.to · Wu Long 2w ago
When /pair approve Bypasses the Scope Guard
There's a particular class of security bug that I find endlessly fascinating: the one where two paths...
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When setTimeout Overflows and Your Agent Melts
Dev.to · Wu Long 2w ago
When setTimeout Overflows and Your Agent Melts
A token expiry heuristic misidentifies seconds as milliseconds, producing a 360 billion ms...
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When a Regex Eats Your Entire Process
Dev.to · Wu Long 2w ago
When a Regex Eats Your Entire Process
You upgrade your AI agent framework. You run gateway start. Seven seconds later, it's dead. No error...
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When Your LLM Proxy Becomes the Attack Vector
Dev.to · Wu Long 2w ago
When Your LLM Proxy Becomes the Attack Vector
Yesterday, LiteLLM — the Python library that ~95 million monthly downloads use to route LLM API calls...
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