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Sam Rivera

Solo builder shipping small AI tools in public • Sharing what breaks, what ships, and what I wish I knew earlier • Mostly Python, TypeScript, and questionable CSS

Location Remote / Lisbon Joined Joined on 
Your Free AI Server Will 429 at 2 AM: A Budget-Watch Checklist That Fails Loud
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Your Free AI Server Will 429 at 2 AM: A Budget-Watch Checklist That Fails Loud

#ai #devops #testing #productivity
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3 min read
Your AI Code Reviewer Is Untested: 45 Lines to Score It Before Merge Rights
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Your AI Code Reviewer Is Untested: 45 Lines to Score It Before Merge Rights

#ai #testing #python #devtools
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4 min read
Your Free AI Server Will Fail Quietly. Five Gates to Make It Loud.
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Your Free AI Server Will Fail Quietly. Five Gates to Make It Loud.

#ai #python #productivity #devex
1
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4 min read
Seven Gates Before You Trust a Free Model Endpoint
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Seven Gates Before You Trust a Free Model Endpoint

#ai #testing #devops #productivity
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4 min read
Fail Closed: A Production-Readiness Checklist for AI Code
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Fail Closed: A Production-Readiness Checklist for AI Code

#ai #testing #devops #productivity
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4 min read
I Taught a Free Model to Read 10,000 Log Lines So I Could Sleep
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I Taught a Free Model to Read 10,000 Log Lines So I Could Sleep

#ai #python #devops #productivity
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3 min read
Build a 50-Line Harness to Test Whether a Free Model Endpoint Can Fix Broken JSON
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Build a 50-Line Harness to Test Whether a Free Model Endpoint Can Fix Broken JSON

#ai #python #json #cli
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5 min read
Free Model vs. 40 Lines of Python: Who Reads Build Logs Better?
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Free Model vs. 40 Lines of Python: Who Reads Build Logs Better?

#ai #python #testing #devops
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4 min read
Probe AI Text Detector Claims on a Free 30M-Token Endpoint
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Probe AI Text Detector Claims on a Free 30M-Token Endpoint

#ai #python #testing #llm
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4 min read
Quantify the Breaking Point of a Free Model Endpoint
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Quantify the Breaking Point of a Free Model Endpoint

#ai #python #cli #opensource
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4 min read
Use a Free Server and 30M Tokens as a Disposable Regression Oracle
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Use a Free Server and 30M Tokens as a Disposable Regression Oracle

#ai #cli #python #developer
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5 min read
Use a Free Model Endpoint as a Last-Minute Shell Gatekeeper
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Use a Free Model Endpoint as a Last-Minute Shell Gatekeeper

#ai #cli #automation #bash
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5 min read
Build a 45-Minute Demand Probe Before You Trust a 30M-Token Free Server
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Build a 45-Minute Demand Probe Before You Trust a 30M-Token Free Server

#python #ai #devops #opensource
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4 min read
Stop Skimming Build Logs: Route Shell Errors Through a Free Model Sidecar
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Stop Skimming Build Logs: Route Shell Errors Through a Free Model Sidecar

#python #cli #debugging #ai
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6 min read
Build a Fail-Open Shim for a Free Model Endpoint That Goes Quiet
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Build a Fail-Open Shim for a Free Model Endpoint That Goes Quiet

#ai #typescript #cli #monkeycode
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6 min read
A Two-Prompt Watchdog for the Free Model Endpoint You Already Rely On
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A Two-Prompt Watchdog for the Free Model Endpoint You Already Rely On

#ai #tutorial #cli #monkeycode
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5 min read
Build a Token Ledger Before You Burn Through a Free Model Tier
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Build a Token Ledger Before You Burn Through a Free Model Tier

#ai #python #cli #tutorial
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5 min read
Audit Your Token Burn Before a Free Model Endpoint Hosts Your Next Side Project
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Audit Your Token Burn Before a Free Model Endpoint Hosts Your Next Side Project

#ai #opensource #programming #cli
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5 min read
Build a Budget Watchdog for a Free Model Endpoint Before It Goes Quiet
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Build a Budget Watchdog for a Free Model Endpoint Before It Goes Quiet

#ai #typescript #devops #automation
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5 min read
A Free-Server Canary for Same-Day Model Announcements
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A Free-Server Canary for Same-Day Model Announcements

#ai #python #automation #cli
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4 min read
Build a 50-Line Validation Guard for Free Model JSON Before It Reaches Your CLI
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Build a 50-Line Validation Guard for Free Model JSON Before It Reaches Your CLI

#ai #node #automation #cli
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6 min read
Build a 60-Line Tool-Call Canary for Your Agent Before It Touches the Shell
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Build a 60-Line Tool-Call Canary for Your Agent Before It Touches the Shell

#ai #agents #python #security
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4 min read
A Five-Minute Probe Before You Point a Side Project at a Free Model Endpoint
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A Five-Minute Probe Before You Point a Side Project at a Free Model Endpoint

#ai #python #devops #serverless
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4 min read
A New Open Model Dropped This Week. Here's My 45-Minute "Should I Switch?" Harness
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A New Open Model Dropped This Week. Here's My 45-Minute "Should I Switch?" Harness

#ai #opensource #python #tooling
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4 min read
Turn Your Side Project's Logs Into a Daily Triage Digest Instead of Reading Them Raw
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Turn Your Side Project's Logs Into a Daily Triage Digest Instead of Reading Them Raw

#python #ai #productivity #indiedev
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3 min read
I Stopped Running Agent-Generated Code on My Laptop: A 20-Minute Disposable Sandbox
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I Stopped Running Agent-Generated Code on My Laptop: A 20-Minute Disposable Sandbox

#ai #agents #security #tutorial
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5 min read
I Swapped My Side Project's Paid LLM Calls for Free Model Access — Here's the Canary Harness I Used First
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I Swapped My Side Project's Paid LLM Calls for Free Model Access — Here's the Canary Harness I Used First

#ai #cli #python #devlog
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4 min read
I Stopped Paying for LLM Calls in My Side Project's CI: A One-Task Canary Setup
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I Stopped Paying for LLM Calls in My Side Project's CI: A One-Task Canary Setup

#ai #typescript #cli #indiehacker
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5 min read
Smoke-Test Agent Skills in a Fixture Repo Before You Trust Them
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Smoke-Test Agent Skills in a Fixture Repo Before You Trust Them

#ai #cli #testing #productivity
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5 min read
Build a Two-Lane Task Router So Your Free AI Tier Survives the Whole Day
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Build a Two-Lane Task Router So Your Free AI Tier Survives the Whole Day

#ai #cli #python #productivity
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5 min read
Build a Slopsquatting Canary Before You Trust AI-Suggested Packages
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Build a Slopsquatting Canary Before You Trust AI-Suggested Packages

#security #ai #cli #python
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5 min read
"Build a Handoff Receipt Before Delegating Linear Work"
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"Build a Handoff Receipt Before Delegating Linear Work"

#cli #github #productivity #ai
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3 min read
"Build a Portable Bootstrap and Exit Bundle for Cloud Coding Sessions"
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"Build a Portable Bootstrap and Exit Bundle for Cloud Coding Sessions"

#cli #cloud #devtools #ai
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3 min read
"Build a CLI Matrix for Model Effort Without Faking a Benchmark"
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"Build a CLI Matrix for Model Effort Without Faking a Benchmark"

#cli #ai #devtools #testing
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3 min read
"Run This CLI Preflight Before Your First MonkeyCode Task"
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"Run This CLI Preflight Before Your First MonkeyCode Task"

#cli #python #ai #devtools
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3 min read
Build a CLI Provider Health Probe With a Local Task Journal
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Build a CLI Provider Health Probe With a Local Task Journal

#cli #python #ai #reliability
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3 min read
Build a Local Health Export Redaction Validator CLI
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Build a Local Health Export Redaction Validator CLI

#cli #python #privacy #testing
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3 min read
Build a CLI Eval Harness That Can Stop Before the Model Escapes Its Fixture
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Build a CLI Eval Harness That Can Stop Before the Model Escapes Its Fixture

#cli #testing #ai #security
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3 min read
Make Your CLI Config Write Survive Ctrl-C Without Leaving Truncated JSON
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Make Your CLI Config Write Survive Ctrl-C Without Leaving Truncated JSON

#node #cli #javascript #testing
1
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4 min read
Before Adopting jcode, Run a 15-Minute Agent-Harness Exit Test
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Before Adopting jcode, Run a 15-Minute Agent-Harness Exit Test

#ai #devtools #opensource #testing
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2 min read
Kimi K3 API Costs 3.5x More Than K2.6-Run This 30-Minute Break-Even Test
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Kimi K3 API Costs 3.5x More Than K2.6-Run This 30-Minute Break-Even Test

#ai #product #devtools #cost
Comments 1
2 min read
Build a Five-File Canary Before You Trust an Agentic Coding Product
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Build a Five-File Canary Before You Trust an Agentic Coding Product

#ai #testing #productivity #opensource
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2 min read
Ship a Restart-Safe Upload CLI That Survives an Expired Resume URL
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Ship a Restart-Safe Upload CLI That Survives an Expired Resume URL

#node #cli #webdev #testing
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1 min read
Test the Copilot Desktop App With a 20-Minute BYOK Exit Drill
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Test the Copilot Desktop App With a 20-Minute BYOK Exit Drill

#githubcopilot #productivity #testing #git
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1 min read
Back Up SQLite’s WAL Before a Migration—Then Prove the Restore Works
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Back Up SQLite’s WAL Before a Migration—Then Prove the Restore Works

#sqlite #cli #testing #devops
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1 min read
Build a Restart-Safe RSS Change Detector in a Free Cloud Coding Session
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Build a Restart-Safe RSS Change Detector in a Free Cloud Coding Session

#javascript #ai #cli #testing
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2 min read
GPT-Red Is a Research Result—This 55-Line Replay Harness Is the Part Small Teams Can Use Today
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GPT-Red Is a Research Result—This 55-Line Replay Harness Is the Part Small Teams Can Use Today

#ai #security #testing #python
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3 min read
MonkeyCode Without Local Setup: A 30-Minute Exit Test for Cloud Coding Agents
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MonkeyCode Without Local Setup: A 30-Minute Exit Test for Cloud Coding Agents

#ai #devtools #productivity #testing
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2 min read
Remove the Copilot CLI PAT From GitHub Actions Without Losing Your Rollback
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Remove the Copilot CLI PAT From GitHub Actions Without Losing Your Rollback

#githubactions #cli #githubcopilot #security
1
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2 min read
Record and Replay One MCP Tool Call Without Keeping Its Secrets
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Record and Replay One MCP Tool Call Without Keeping Its Secrets

#mcp #ai #testing #devtools
Comments 1
2 min read
Before Enabling Copilot Agent in JetBrains, Make a Three-Issue Exit Test
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Before Enabling Copilot Agent in JetBrains, Make a Three-Issue Exit Test

#github #jetbrains #ai #devtools
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2 min read
Try an AI Dev Platform Without the Setup Tax: MonkeyCode's Hosted SaaS
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Try an AI Dev Platform Without the Setup Tax: MonkeyCode's Hosted SaaS

#ai #indiehackers #devtools #productivity
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2 min read
Turn a GitHub Issue Into an AI-Ready Bug Packet
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Turn a GitHub Issue Into an AI-Ready Bug Packet

#github #ai #testing #devtools
1
Comments 1
3 min read
Build a 30-Line Provenance Log for AI-Generated Code
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Build a 30-Line Provenance Log for AI-Generated Code

#ai #devtools #javascript #productivity
1
Comments 1
1 min read
Give a Dead Side Project an Exit Report, Not an AI Eulogy
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Give a Dead Side Project an Exit Report, Not an AI Eulogy

#indiehackers #productivity #devtools #opensource
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2 min read
Your AGENTS.md Needs an Executable Contract, Not More Advice
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Your AGENTS.md Needs an Executable Contract, Not More Advice

#ai #agents #devtools #tutorial
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4 min read
Before Betting on a New JavaScript Runtime, Build Three Exit Ramps
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Before Betting on a New JavaScript Runtime, Build Three Exit Ramps

#javascript #webdev #devtools #architecture
1
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3 min read
Build the Failure Path Before You Trust an AI Task CLI
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Build the Failure Path Before You Trust an AI Task CLI

#devtools #node #ai #productivity
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3 min read
Trace One Prompt Through Your LLM App Before Adding More Features
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Trace One Prompt Through Your LLM App Before Adding More Features

#ai #llm #beginners #programming
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3 min read
Meta Just Launched Muse Spark 1.1 for Coding — And Cursor Should Be Worried
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Meta Just Launched Muse Spark 1.1 for Coding — And Cursor Should Be Worried

#ai #meta #coding #developer
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3 min read
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