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Sam Sun

Full-stack developer passionate about open source and clean code.

Location New York, NY Joined Joined on 
Diff the Run Card, Not the Log Stream

Diff the Run Card, Not the Log Stream

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8 min read
The Data Boundary Problem: Using a Free Server Without Leaking Your Prompts

The Data Boundary Problem: Using a Free Server Without Leaking Your Prompts

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4 min read
The 429 Cascade: Debugging a Code-Review Bot on a Free Endpoint

The 429 Cascade: Debugging a Code-Review Bot on a Free Endpoint

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5 min read
MiniMax H3: Run a 30-Minute Adoption Gate Before You Commit

MiniMax H3: Run a 30-Minute Adoption Gate Before You Commit

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2 min read
Stdout Order Is Not Causality: A Parent-Span Contract for Agents

Stdout Order Is Not Causality: A Parent-Span Contract for Agents

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8 min read
Quota Is a Test Signal: Budgeting Free Model Calls Like CI Minutes

Quota Is a Test Signal: Budgeting Free Model Calls Like CI Minutes

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5 min read
Free Tokens Won't Fix Black-Box Agent Runs: Build a Trace Loop

Free Tokens Won't Fix Black-Box Agent Runs: Build a Trace Loop

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4 min read
Agent Summaries Are Claims, Not Logs: A Trace Audit Loop

Agent Summaries Are Claims, Not Logs: A Trace Audit Loop

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4 min read
A Free-Tier Trace Loop for Agent Run Regression

A Free-Tier Trace Loop for Agent Run Regression

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4 min read
Diff the Traces, Not the Code: A Bisection Loop for Agent Runs

Diff the Traces, Not the Code: A Bisection Loop for Agent Runs

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4 min read
Turn Agent Tool Calls Into Run Receipts

Turn Agent Tool Calls Into Run Receipts

BERJAYA 1
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4 min read
Agent Runs Are Black Boxes: A Trace-First Debug Loop

Agent Runs Are Black Boxes: A Trace-First Debug Loop

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4 min read
Free Model Access and Free Hosting: A Decision Guide for Agent Workloads

Free Model Access and Free Hosting: A Decision Guide for Agent Workloads

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3 min read
Free Endpoints Are a Contract, Not a Gift: A Fit Test for Agent Workloads

Free Endpoints Are a Contract, Not a Gift: A Fit Test for Agent Workloads

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5 min read
Your Retry Loop Is a Token Incinerator: A Cascade Router for Mixed-Tier Endpoints

Your Retry Loop Is a Token Incinerator: A Cascade Router for Mixed-Tier Endpoints

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5 min read
Free vs Self-Hosted Models: A Break-Even Framework for Agent Workloads

Free vs Self-Hosted Models: A Break-Even Framework for Agent Workloads

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5 min read
A Cost-Per-Token Benchmark Is Not Enough: A Reproducible Harness for Free and Cheap Model Endpoints

A Cost-Per-Token Benchmark Is Not Enough: A Reproducible Harness for Free and Cheap Model Endpoints

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4 min read
A Preflight Harness for Tool-Using Coding Agents

A Preflight Harness for Tool-Using Coding Agents

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5 min read
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