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Charlie Hu

Backend developer who loves Rust and distributed systems.

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A Scope Card Beats a Bigger Prompt: Cutting a Weekend Agent Demo to One Path

A Scope Card Beats a Bigger Prompt: Cutting a Weekend Agent Demo to One Path

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8 min read
Stamp the Run: A Weekend Receipt Book for Agent Side Projects

Stamp the Run: A Weekend Receipt Book for Agent Side Projects

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7 min read
Stage the Tools: A Weekend Dry-Run Bus for Agent Side Projects

Stage the Tools: A Weekend Dry-Run Bus for Agent Side Projects

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7 min read
Cap the Turns: A Weekend Call Envelope for Agent Side Projects

Cap the Turns: A Weekend Call Envelope for Agent Side Projects

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7 min read
Trip the Loop: A Weekend Circuit Breaker for Agent Side Projects

Trip the Loop: A Weekend Circuit Breaker for Agent Side Projects

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7 min read
Seal the Tools: A Weekend Allowlist for Agent Side Projects

Seal the Tools: A Weekend Allowlist for Agent Side Projects

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8 min read
Lease the Worker: A Weekend Heartbeat for Agent Side Projects

Lease the Worker: A Weekend Heartbeat for Agent Side Projects

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8 min read
Tape the Model Calls: A Weekend Cassette for Agent Side Projects

Tape the Model Calls: A Weekend Cassette for Agent Side Projects

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7 min read
Tape the Model Calls: A Weekend Cassette for Agent Side Projects

Tape the Model Calls: A Weekend Cassette for Agent Side Projects

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7 min read
Permit the Writes: A Weekend Outbox for Agent Side Projects

Permit the Writes: A Weekend Outbox for Agent Side Projects

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6 min read
Preflight the Free Allowance: A Weekend Spend Meter for Agent Side Projects

Preflight the Free Allowance: A Weekend Spend Meter for Agent Side Projects

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5 min read
Keep the Agent Finite: A Weekend Step Ledger for Side Projects

Keep the Agent Finite: A Weekend Step Ledger for Side Projects

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7 min read
The Demo Is a Reducer: A Weekend Fixture Kit for Agent Side Projects

The Demo Is a Reducer: A Weekend Fixture Kit for Agent Side Projects

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6 min read
Stdout Is the Demo: A Weekend Golden-File Build Log

Stdout Is the Demo: A Weekend Golden-File Build Log

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7 min read
A Weekend Ship Receipt: Cut the Scope, Prove the Demo, Record the Skips

A Weekend Ship Receipt: Cut the Scope, Prove the Demo, Record the Skips

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7 min read
Stop After the Demo: A Three-File Halt Kit for Weekend AI Builds

Stop After the Demo: A Three-File Halt Kit for Weekend AI Builds

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7 min read
Cap the Diff: A Weekend Change Budget for Off-Laptop AI Patches

Cap the Diff: A Weekend Change Budget for Off-Laptop AI Patches

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8 min read
Cut the Mock Server: A Weekend Contract Replay for Agent-Written Clients

Cut the Mock Server: A Weekend Contract Replay for Agent-Written Clients

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7 min read
Weekend Scope Cut: An Assumption Ledger Before the AI Writes Code

Weekend Scope Cut: An Assumption Ledger Before the AI Writes Code

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7 min read
Your Code Leaves the Laptop: A Local Redaction Proxy for Free AI Tiers

Your Code Leaves the Laptop: A Local Redaction Proxy for Free AI Tiers

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5 min read
Measure the Burn Rate: A Token Meter for Quota-Limited AI Coding Servers

Measure the Burn Rate: A Token Meter for Quota-Limited AI Coding Servers

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4 min read
Free AI Server vs. Self-Hosted: Score Before You Commit

Free AI Server vs. Self-Hosted: Score Before You Commit

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4 min read
Sanitize Before You Send: A Local Proxy for AI Coding Assistants

Sanitize Before You Send: A Local Proxy for AI Coding Assistants

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4 min read
Weekend Build Log: A Slim Context Pack for Off-Laptop AI Patches

Weekend Build Log: A Slim Context Pack for Off-Laptop AI Patches

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8 min read
Weekend Build Log: A Cheap Technical Debt Radar for AI-Generated Code

Weekend Build Log: A Cheap Technical Debt Radar for AI-Generated Code

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4 min read
Free-Tier AI Commit Messages: A MonkeyCode Build Log

Free-Tier AI Commit Messages: A MonkeyCode Build Log

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4 min read
Weekend Build Log: A Scoring Harness for AI Code Reviewers on a Free Tier

Weekend Build Log: A Scoring Harness for AI Code Reviewers on a Free Tier

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4 min read
A Cheap, Repeatable Way to Catch AI Code That Ignores Your Repo Rules

A Cheap, Repeatable Way to Catch AI Code That Ignores Your Repo Rules

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4 min read
Weekend Build Log: A Session Snapshot Trail for AI Coding — What I Built, Cut, and Kept

Weekend Build Log: A Session Snapshot Trail for AI Coding — What I Built, Cut, and Kept

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6 min read
Zero-Cost CI Flake Triage: Build Notes from a Free-Tier Weekend

Zero-Cost CI Flake Triage: Build Notes from a Free-Tier Weekend

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4 min read
Weekend Build Log: A Repo Digest Bot on Free Credits — Scope Cut, Demo, What Got Skipped

Weekend Build Log: A Repo Digest Bot on Free Credits — Scope Cut, Demo, What Got Skipped

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6 min read
Free AI Backend or Paid API? A Decision Guide You Can Run

Free AI Backend or Paid API? A Decision Guide You Can Run

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4 min read
Free Tier, Paid API, or Self-Hosted: A Fit Framework for AI Coding Tools

Free Tier, Paid API, or Self-Hosted: A Fit Framework for AI Coding Tools

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5 min read
That New Model Post Says It's Cheap and Good. Test It Yourself First.

That New Model Post Says It's Cheap and Good. Test It Yourself First.

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3 min read
Stop Chasing the MiniMax H3 Hype. Test the Free Tier First.

Stop Chasing the MiniMax H3 Hype. Test the Free Tier First.

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4 min read
Build a Tiny Gate for AI-Generated Code Before You Merge It

Build a Tiny Gate for AI-Generated Code Before You Merge It

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4 min read
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