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Casey Sun

Software engineer by day, open source contributor by night.

San Francisco, CA Joined on Aug 3, 2026

Casey Sun

Sep 8

Do Not Bind Agent Webhooks to a Free Host

#ai #agents #javascript #devops

7 min read

Casey Sun

Sep 8

Uncited Runtime Does Not Belong on a Free Host

#ai #agents #security #devops

6 min read

Casey Sun

Sep 6

When Not to Ship Architecture the Agent Invented

#ai #agents #architecture #ci

7 min read

Casey Sun

Sep 5

Fail the Plan When Missing Config Resolves to Free Compute

#javascript #ai #agents #testing

6 min read

Casey Sun

Sep 4

Fail CI When the Agent Treats Free Compute as Inventory

#ai #agents #devops #testing

7 min read

Casey Sun

Sep 4

When an Agent Invents a Cache, Refuse the Merge

#ai #agents #webdev #caching

6 min read

Casey Sun

Sep 4

Every Token Is a Line Item: A Ledger Workflow for Agent Spend

#ai #agents #llm #database

4 min read

Casey Sun

Sep 4

Kill the Merge When the Agent Invents Shared State

#ai #agents #testing #architecture

6 min read

Casey Sun

Sep 2

Free AI Compute Has an Expiration Date: A 'Do Not Use' Field Guide

#ai #serverless #architecture #devops

4 min read

Casey Sun

Sep 1

Best-Effort AI Needs a Tripwire: A Circuit Gate for Free Model Endpoints

#ai #architecture #python #tutorial

4 min read

Casey Sun

Aug 31

Free AI Compute Is a Contract, Not a Gift: Stress-Testing MonkeyCode's Free Server Before You Commit

#ai #opensource #serverless #devops

4 min read

Casey Sun

Aug 30

Measure Before You Migrate: The 30-Minute Probe for Free AI Infrastructure

#ai #devops #serverless #performance

4 min read

Casey Sun

Aug 29

Free Quotas Turn You Into a Reviewer: A Workload-Fit Field Guide

#ai #agents #testing #productivity

5 min read

Casey Sun

Aug 28

Not Every Workload Belongs on a Free Server: Red Flags and Exit Criteria

#ai #agents #devops #serverless

5 min read

Casey Sun

Aug 26

The Free-Tier Trap: A Field Guide for Agent Engineers

#ai #agents #testing #architecture

4 min read

Casey Sun

Aug 25

Free AI Servers Are a Constraint, Not a Gift: A Reproducible Evaluation

#ai #llm #agents #opensource

5 min read

Casey Sun

Aug 22

Quota Exhaustion Date: A Capacity Calculator for Free Model Quotas

#ai #llm #devops #tutorial

4 min read

Casey Sun

Aug 13

A Lower Price Tag Is Not a Migration Plan: Quarantining New Models Before They Touch Your Agent

#ai #llm #testing #devops

6 min read

Casey Sun

Aug 10

Treat Every New Open Model Like a Dependency Upgrade: A Pre-Flight Gate

#ai #testing #javascript #opensource

5 min read

Casey Sun

Aug 10

Model Swaps Are Boundary Events: Gate Agent Tool Changes With a Deterministic Replay Lane

#ai #security #agents #testing

6 min read

Casey Sun

Aug 7

Attack Your Agent's Tool Boundaries Before Someone Else Does: A Repeatable Test Harness

#ai #security #testing #agents

6 min read

Casey Sun

Aug 5

A Repeatable Way to Regression-Test Your Prompts Before You Ship Them

#ai #testing #promptengineering #devtools

5 min read

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