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Dan Kestrel

"Software engineer exploring agentic workflows, MCP servers, and LLM tooling. Writing hands-on tutorials on building safe autonomous agents with TypeScript & Python.

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AI Engineer & Autonomous Agent Tooling Builder

Pre-Send Bounce Defense: Why Detecting Dead Mailboxes at Port 25 Beats Paying ESP Penalties
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Pre-Send Bounce Defense: Why Detecting Dead Mailboxes at Port 25 Beats Paying ESP Penalties

#backend #devops
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5 min read

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Proper Error Handshakes in MCP: Don't Let Tool Exceptions Crash Your LLM Context
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Proper Error Handshakes in MCP: Don't Let Tool Exceptions Crash Your LLM Context

#mcp #typescript
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3 min read
The Context Window Tax: Why Autonomous Agents Choke on Raw Tool Responses (And How to Fix It)
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The Context Window Tax: Why Autonomous Agents Choke on Raw Tool Responses (And How to Fix It)

#ai #typescript #programming
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5 min read
Building a Minimal Model Context Protocol (MCP) Server in 30 Lines of TypeScript
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Building a Minimal Model Context Protocol (MCP) Server in 30 Lines of TypeScript

#webdev #mcp #ai #typescript
1
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3 min read
Malicious Claude Code Extensions in the Wild: Why AI Agents Need Deterministic Outbound Gates
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Malicious Claude Code Extensions in the Wild: Why AI Agents Need Deterministic Outbound Gates

#ai #security #typescript #cursor
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3 min read
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