Your Free Tier Has a Concurrency Knee. Go Find It.
The free endpoint didn't fail me with a wrong answer. It failed me with a right answer, eleven seconds late, and that is a much harder bug to notice…
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MicroAudit AI: Local Contract Risk Analyzer
This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle What I Built As a freelancer or side hustler, getting a new…
Your Escalation Ladder Belongs in a Table, Not in Prose
Your escalation ladder should be a decision table that a test suite can replay, not four paragraphs a tired engineer has to interpret at 03:00. That…
Community Copilot: An AI-Powered Discord Assistant for Developer Communities
This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle . What I Built Developer communities on Discord are full of…
Raw HTML vs Rendered: A Quick Check of What Crawlers Actually Read on Your Homepage
Owners often ask why a search engine or an AI assistant describes their business strangely, or not at all. One common, boring cause: the words on th…
Keep Prices Out of the Model: A Rate-Freshness Guard for Jewellery WhatsApp Assistants
A WhatsApp assistant for an Indian jewellery store will be asked about prices constantly. Today's rate, making charges, the cost of a design in a gi…
Your agent's memory stopped writing and nobody told you
The worst persistence failure is not the error: it is the write that never happens and returns success. The agent keeps believing it has memory, and…
I Extracted the Audio From 20 Video Files in 2.2 Seconds — Here's the Batch Pipeline
I help maintain a small archive of recorded meetings and talks. The videos are useful, but nobody re-watches a 40-minute recording to find one decis…
Export App Store and Google Play reviews to Excel and find the top complaints
Disclosure: I built the reviews scraper used in this post and earn money when people run it. The pandas part works with reviews from any source. App…
Quantified Self: How I Handled 100GB of Messy Biosensor Data with Polars and Dask
We live in the era of the "Quantified Self." Between my Oura ring, Apple Watch, and continuous glucose monitor (CGM), I’m generating more data than…
The Test Wasn't Wrong. It Was Answering an Older Question.
The Test Wasn't Wrong. It Was Answering an Older Question. I shipped a change I had reviewed, simulated, and deployed. An hour later my acceptance s…
Evaluate RAG retrieval before changing your chatbot prompt
Before tuning a prompt, check if the retriever actually surfaced the evidence. A fluent answer often hides a missing document. And a retrieved docum…
APIWatch: Checking API Traffic and Subscription Controls with WSO2 API Manager
I recently worked on a project called APIWatch using Python and WSO2 API Manager. It is a small monitoring tool that reads API traffic logs and help…
PitGraph: building an F1 strategist whose memory is a graph
How I built a multi-agent race-strategy assistant on FalkorDB in four days for Graph Hacks, and what the graph made easy (and hard). Ask a Formula 1…
Five concepts to learn before you build with LLMs
If you can ship ordinary software, you can start building with large language models. I would not start in the API console. I would learn five ideas…
Model Context Protocol (MCP) for Local LLMs: Connect Ollama & vLLM to Workstation Tools
📌 The Executive Verdict: The Model Context Protocol (MCP) Decoupling Anthropic's open-standard Model Context Protocol (MCP) resolves the fundamental…
Build a 10-Case Eval Set for Your AI Agent and Run It on Every Change
Your agent worked in the demo. Then you tweaked the system prompt, swapped the model, or renamed a tool argument, and now you're not sure whether it…
Cronbach's Alpha Explained: Formula, Worked Example, Python/R Code, and a Free Calculator
You built a survey with several questions that are supposed to measure the same thing (say, "job satisfaction" or "stats anxiety"). Before you avera…
I Built a Product Listing Writer That Costs $0 Per Listing to Run
This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle What I Built A friend who sells on Etsy told me her weekly r…
A(5) = 5: four matrices finish the case t = 5
This is from MV2's open notebook on Kakeya-type problems ( https://github.com/munimtechnologies/kakeya-small-fields ). It continues the earlier post…
48-Hour Field Notes: Exit Code 137 at Hour 31 Was Not a Bug in My Code
I run long jobs on purpose, because short jobs lie to me in pleasant ways. A loop that finishes in ninety seconds never teaches you what happens whe…
Testing an AI Refund Workflow: Allow, Deny, Modify, and Escalate
A support agent handling a refund might need to look up a customer, submit an amount, and explain why the refund is appropriate. Each step raises a…
Building a construction WIP schedule in Python: percent complete, over and under billing, and the month-end entry
A construction WIP schedule computes earned revenue for each open job as contract price times percent complete , where percent complete is cost to d…
48-Hour Field Notes: The Batch Worker Vanished and My Re-Run Redid Every Item
Two days ago I started a batch of prompt evaluations, closed the laptop lid, and assumed the free server would keep chewing through the queue while…
Properties Without Witnesses Are Decorations: A Falsifiability Gate for Agent Patches
A property that passes on the patched tree and on the pre-patch tree carries no information. That is the first thing to measure, before you trust an…
Cropping scanned answer sheets with a QR code as the anchor (Python + OpenCV)
I'm an elementary school teacher in Korea and I build small tools for my own grading. The slowest part was never the grading itself. It was sorting…
Pairing inter-account transfers across bank statements with pandas
To pair inter-account transfers across bank statements, match each outflow to an inflow of the same absolute amount , in a different account , withi…
From Paper to Insights: Build Your Own Private Medical RAG with Pinecone, Ollama, and PaddleOCR
Let’s be honest: looking at a blood test result or a medical lab report feels like trying to read ancient hieroglyphics. You see numbers like Albumi…
Localizing Open-Source ERP: How Odoo 19 is Adapted for Solar Hijri, Complex Tax, and RTL
Enterprise Resource Planning (ERP) adoption in non-Western markets frequently faces a severe bottleneck: native ERP engines are deeply hardcoded aro…
Whisper Hallucinations: 'Thanks for Watching' in 9% of My Transcripts
A user emailed me a screenshot of their feedback report. Under "Communication," my scoring model had written: "Closed the answer with 'Thanks for wa…