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Quinn Sun

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

Location Tokyo, Japan Joined Joined on 
The Pairing Session That Would Not Score a Patch in a Chat Window

The Pairing Session That Would Not Score a Patch in a Chat Window

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7 min read
One Test Must Flip, One Must Not: A Pairing Gate for Agent Patches

One Test Must Flip, One Must Not: A Pairing Gate for Agent Patches

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6 min read
The Slice Contract Compiled Before Any Remote Token Moved

The Slice Contract Compiled Before Any Remote Token Moved

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7 min read
The Question Ledger Stopped the Agent Before Round Four

The Question Ledger Stopped the Agent Before Round Four

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8 min read
The Extra Tool Call Did Not Survive Pairing

The Extra Tool Call Did Not Survive Pairing

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8 min read
The Agent Invented a Queue URL. The Senior Froze the World First

The Agent Invented a Queue URL. The Senior Froze the World First

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7 min read
The Senior Froze the Runtime Before the Agent Proposed a Patch

The Senior Froze the Runtime Before the Agent Proposed a Patch

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6 min read
The Senior Pinned cwd Before the Agent Touched the Tree

The Senior Pinned cwd Before the Agent Touched the Tree

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6 min read
The Pairing Transcript Became the Diff Allowlist

The Pairing Transcript Became the Diff Allowlist

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6 min read
Write the Change Surface First: A Pairing Session on Cheap Agent Patches

Write the Change Surface First: A Pairing Session on Cheap Agent Patches

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8 min read
What Survived the Pairing: An Invariant Gate for a Stateless Coding Agent

What Survived the Pairing: An Invariant Gate for a Stateless Coding Agent

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8 min read
Fail CI on Token Overruns with a GitHub Actions Budget Gate

Fail CI on Token Overruns with a GitHub Actions Budget Gate

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6 min read
The Redaction Layer: What to Strip Before Your Code Touches a Free AI Agent

The Redaction Layer: What to Strip Before Your Code Touches a Free AI Agent

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5 min read
Dead Ends, Then One Rule: A Pairing Session on Agent Assumptions

Dead Ends, Then One Rule: A Pairing Session on Agent Assumptions

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8 min read
Free Models + Free Server = A PR Review Bot You Can Actually Run

Free Models + Free Server = A PR Review Bot You Can Actually Run

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6 min read
AI Code Review on a Free-Tier Budget: A Practical Batching Strategy

AI Code Review on a Free-Tier Budget: A Practical Batching Strategy

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4 min read
Score Your Free AI Code Reviewer Before You Trust It: A Server-Side Experiment

Score Your Free AI Code Reviewer Before You Trust It: A Server-Side Experiment

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4 min read
Run It on the Free Server and See: A Pairing Session on AI-Generated Tests

Run It on the Free Server and See: A Pairing Session on AI-Generated Tests

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4 min read
When Your Test Log Is 2,000 Lines Long: A Free-Server Flake Classifier

When Your Test Log Is 2,000 Lines Long: A Free-Server Flake Classifier

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6 min read
Review Budget, Not Token Budget: A Pairing Session on Free-Tier Model Access

Review Budget, Not Token Budget: A Pairing Session on Free-Tier Model Access

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5 min read
A Pairing Session on Free AI Coding Access: Three Dead Ends and the Decision That Stuck

A Pairing Session on Free AI Coding Access: Three Dead Ends and the Decision That Stuck

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4 min read
MonkeyCode's Free Tier vs. Self-Hosting: A Decision Matrix and Probe Script

MonkeyCode's Free Tier vs. Self-Hosting: A Decision Matrix and Probe Script

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5 min read
The Quota Cliff: A Failover Pattern for When Your Free Agent Server Runs Dry

The Quota Cliff: A Failover Pattern for When Your Free Agent Server Runs Dry

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4 min read
Free vs. Self-Hosted Coding Models: A Fit Framework That Ignores the Sticker Price

Free vs. Self-Hosted Coding Models: A Fit Framework That Ignores the Sticker Price

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4 min read
Replay Your Last Ten Bugfixes Before You Trust a New Coding Model

Replay Your Last Ten Bugfixes Before You Trust a New Coding Model

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5 min read
Replay Your Last Ten Bugfixes Before You Trust a New Coding Model

Replay Your Last Ten Bugfixes Before You Trust a New Coding Model

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5 min read
When a New Model Like MiniMax H3 Drops, Don't Measure Vibes—Measure Regressions

When a New Model Like MiniMax H3 Drops, Don't Measure Vibes—Measure Regressions

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4 min read
Measure a Free Coding Model's Patch Footprint Before You Merge It

Measure a Free Coding Model's Patch Footprint Before You Merge It

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4 min read
The Question Nobody Asks About Free Coding Models: How Many of Their Patches Break Something Else?

The Question Nobody Asks About Free Coding Models: How Many of Their Patches Break Something Else?

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5 min read
Before You Give a Coding Agent Shell Access, Test Where Its Boundaries Actually Are

Before You Give a Coding Agent Shell Access, Test Where Its Boundaries Actually Are

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5 min read
A Reproducible Way to Test Free Coding Models Before You Trust Them With Real Bugs

A Reproducible Way to Test Free Coding Models Before You Trust Them With Real Bugs

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4 min read
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