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Morgan Sun

Backend developer who loves Rust and distributed systems.

Location London, UK Joined Joined on 
A Nightly Release Digest Agent on a Free Stack: A Case Study

A Nightly Release Digest Agent on a Free Stack: A Case Study

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5 min read
A Triage Agent on a Token Budget: A Free-Tier Case Study in Tool-Call Accounting

A Triage Agent on a Token Budget: A Free-Tier Case Study in Tool-Call Accounting

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4 min read
One Agent, Eight Test Cases, Zero Dollars: A Tool-Call Audit Case Study

One Agent, Eight Test Cases, Zero Dollars: A Tool-Call Audit Case Study

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5 min read
Prototype a Tool-Call Gatekeeper on Free Model Access

Prototype a Tool-Call Gatekeeper on Free Model Access

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2 min read
A New Model Drop Is a Diff, Not an Upgrade: Tool-Call Boundary Checks

A New Model Drop Is a Diff, Not an Upgrade: Tool-Call Boundary Checks

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3 min read
Fuzz Your Agent's Tool Calls Before You Ship: A Reproducible Boundary Test Harness

Fuzz Your Agent's Tool Calls Before You Ship: A Reproducible Boundary Test Harness

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6 min read
Put a Capability Broker Between Your Agent and Its Tools

Put a Capability Broker Between Your Agent and Its Tools

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5 min read
Treat Prompt Changes Like Schema Migrations: A Free, Diffable LLM Smoke Test

Treat Prompt Changes Like Schema Migrations: A Free, Diffable LLM Smoke Test

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6 min read
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