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Casey Sun

Software engineer by day, open source contributor by night.

Location San Francisco, CA Joined Joined on 
When the Free Tier Stops Being Cheap: A Load-Based Exit Test for Agent Backends
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When the Free Tier Stops Being Cheap: A Load-Based Exit Test for Agent Backends

#ai #agents #devops #performance
1
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5 min read
Agent Scratchpads Fail Closed: A When-Not-To Field Guide
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Agent Scratchpads Fail Closed: A When-Not-To Field Guide

#ai #security #programming #devops
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7 min read
Do Not Let a Free Model Author the Agent Allowlist
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Do Not Let a Free Model Author the Agent Allowlist

#ai #javascript #security #agents
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6 min read
Do Not Let a Free Lane Own the Agent Halt Bit
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Do Not Let a Free Lane Own the Agent Halt Bit

#ai #agents #security #testing
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6 min read
Refuse Free-Tier Routing on Privileged Agent Steps
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Refuse Free-Tier Routing on Privileged Agent Steps

#agents #ai #security #devops
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7 min read
Stop Treating Free-Model LGTM as a Merge Gate
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Stop Treating Free-Model LGTM as a Merge Gate

#ai #agents #devops #testing
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7 min read
Do Not Bind Agent Webhooks to a Free Host
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Do Not Bind Agent Webhooks to a Free Host

#ai #agents #javascript #devops
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7 min read
Uncited Runtime Does Not Belong on a Free Host
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Uncited Runtime Does Not Belong on a Free Host

#ai #agents #security #devops
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6 min read
When Not to Ship Architecture the Agent Invented
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When Not to Ship Architecture the Agent Invented

#ai #agents #architecture #ci
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7 min read
Fail the Plan When Missing Config Resolves to Free Compute
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Fail the Plan When Missing Config Resolves to Free Compute

#javascript #ai #agents #testing
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6 min read
Fail CI When the Agent Treats Free Compute as Inventory
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Fail CI When the Agent Treats Free Compute as Inventory

#ai #agents #devops #testing
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7 min read
When an Agent Invents a Cache, Refuse the Merge
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When an Agent Invents a Cache, Refuse the Merge

#ai #agents #webdev #caching
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6 min read
Every Token Is a Line Item: A Ledger Workflow for Agent Spend
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Every Token Is a Line Item: A Ledger Workflow for Agent Spend

#ai #agents #llm #database
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4 min read
Kill the Merge When the Agent Invents Shared State
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Kill the Merge When the Agent Invents Shared State

#ai #agents #testing #architecture
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6 min read
Free AI Compute Has an Expiration Date: A 'Do Not Use' Field Guide
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Free AI Compute Has an Expiration Date: A 'Do Not Use' Field Guide

#ai #serverless #architecture #devops
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4 min read
Best-Effort AI Needs a Tripwire: A Circuit Gate for Free Model Endpoints
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Best-Effort AI Needs a Tripwire: A Circuit Gate for Free Model Endpoints

#ai #architecture #python #tutorial
Comments 1
4 min read
Free AI Compute Is a Contract, Not a Gift: Stress-Testing MonkeyCode's Free Server Before You Commit
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Free AI Compute Is a Contract, Not a Gift: Stress-Testing MonkeyCode's Free Server Before You Commit

#ai #opensource #serverless #devops
1
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4 min read
Measure Before You Migrate: The 30-Minute Probe for Free AI Infrastructure
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Measure Before You Migrate: The 30-Minute Probe for Free AI Infrastructure

#ai #devops #serverless #performance
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4 min read
Free Quotas Turn You Into a Reviewer: A Workload-Fit Field Guide
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Free Quotas Turn You Into a Reviewer: A Workload-Fit Field Guide

#ai #agents #testing #productivity
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5 min read
Not Every Workload Belongs on a Free Server: Red Flags and Exit Criteria
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Not Every Workload Belongs on a Free Server: Red Flags and Exit Criteria

#ai #agents #devops #serverless
2
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5 min read
The Free-Tier Trap: A Field Guide for Agent Engineers
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The Free-Tier Trap: A Field Guide for Agent Engineers

#ai #agents #testing #architecture
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4 min read
Free AI Servers Are a Constraint, Not a Gift: A Reproducible Evaluation
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Free AI Servers Are a Constraint, Not a Gift: A Reproducible Evaluation

#ai #llm #agents #opensource
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5 min read
Quota Exhaustion Date: A Capacity Calculator for Free Model Quotas
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Quota Exhaustion Date: A Capacity Calculator for Free Model Quotas

#ai #llm #devops #tutorial
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4 min read
A Lower Price Tag Is Not a Migration Plan: Quarantining New Models Before They Touch Your Agent
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A Lower Price Tag Is Not a Migration Plan: Quarantining New Models Before They Touch Your Agent

#ai #llm #testing #devops
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6 min read
Treat Every New Open Model Like a Dependency Upgrade: A Pre-Flight Gate
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Treat Every New Open Model Like a Dependency Upgrade: A Pre-Flight Gate

#ai #testing #javascript #opensource
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5 min read
Model Swaps Are Boundary Events: Gate Agent Tool Changes With a Deterministic Replay Lane
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Model Swaps Are Boundary Events: Gate Agent Tool Changes With a Deterministic Replay Lane

#ai #security #agents #testing
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6 min read
Attack Your Agent's Tool Boundaries Before Someone Else Does: A Repeatable Test Harness
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Attack Your Agent's Tool Boundaries Before Someone Else Does: A Repeatable Test Harness

#ai #security #testing #agents
Comments 2
6 min read
A Repeatable Way to Regression-Test Your Prompts Before You Ship Them
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A Repeatable Way to Regression-Test Your Prompts Before You Ship Them

#ai #testing #promptengineering #devtools
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5 min read
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