tosane932

Logistics driver in Japan learning Python since May 2026. I build AI-assisted apps to solve real workplace problems. Sharing trial and error on DEV, code on GitHub.

Japan Joined on Jul 23, 2026 https://github.com/tosane932

tosane932

Aug 30

Can You Explain the System AI Built for You? — I Audited My Own Web App with 20 Questions

#python #flask #ai #pytest

13 min read

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tosane932

Aug 27

📝 Growing pytest into an “Incident Prevention Log” — Stage 5: Questioning GREEN with Mutation Testing

#python #pytest #testing #mutationtesting

16 min read

tosane932

Aug 23

📝 Growing pytest into an “Incident Prevention Log” — Stage 4: Testing Failure Scenarios (71 ➡ 87 Tests)

#python #flask #pytest #security

10 min read

tosane932

Aug 21

📝 Growing pytest into an “Incident Prevention Log” — Stage 3: Authentication, CSRF, and Access Control (51 ➡ 69 Tests)

#python #pytest #security #codex

12 min read

tosane932

Aug 21

🐕‍🦺 Don’t Let Codex “Eat Things Off the Ground”: Preventing Scope Creep in pytest Stage 3

#codex #ai #pytest #git

6 min read

tosane932

Aug 21

📝Growing pytest into an "Incident Prevention Log" — Stage 2: Strengthening Sales and Product Registration to 51 Tests

#python #flask #pytest #githubactions

10 min read

tosane932

Aug 21

Don't Let Codex Roam Free: 6 Guardrails I Use for AI-Assisted Coding

#ai #codex #pytest #githubactions

7 min read

tosane932

Aug 17

🔰 pytest, GitHub Actions, and CI — Explained Through a Truck Driver’s Inspection Log

#python #pytest #githubactions #beginners

8 min read

tosane932

Aug 14

📝 Turning pytest into an “Incident-Prevention Ledger” — Phase 1: From 3 Simple Tests to 9 Regression Tests

#python #flask #pytest #testing

10 min read

tosane932

Aug 14

Securing AI Response Rendering in Flask — Replacing innerHTML After a Codex Review

#flask #javascript #security #codex

9 min read

tosane932

Aug 8

Existing DB Works, Empty DB Fails — Repairing a Broken Flask-Migrate History

#flask #postgres #alembic #docker

11 min read

tosane932

Aug 4

🔨 XSS Fixed in 47 Seconds? Using VS Code Codex as a Veteran Inspector from Another Department

#python #flask #security #codex

11 min read

tosane932

Aug 3

From Two AI Apps to a Vision for “Frontline Support AI”

#python #flask #ai #portfolio

7 min read

tosane932

Aug 3

🚛 A Five-Hour Inspection of a Working Flask App — Aligning Code, README, Docker, and Git with the Current Specification

#python #flask #docker #beginners

17 min read

tosane932

Aug 2

“Save” and “Update” Are Not the Same — How a Former Okonomiyaki Chef Removed Confusing UI from a Flask App

#python #flask #css #ux

13 min read

tosane932

Aug 2

📝 Ending Product Sales Without Breaking Sales History — Implementing Soft Deletes and Reducing Gemini API Usage in Flask

#python #flask #postgres #sqlalchemy

8 min read

tosane932

Aug 2

My Progress After Two Months and 129 Hours of Learning Python — Building a Bakery Sales Management System

#python #flask #docker #portfolio

5 min read

tosane932

Aug 2

【Render】Migrating from SQLite to PostgreSQL: Fixing the `postgres://` Connection Error and the “Still Using SQLite” Problem [3/3]

#python #flask #postgres #render

8 min read

tosane932

Aug 2

🧪 Moving Beyond `db.create_all()`: Managing Database Schema History with Flask-Migrate [2/3]

#python #flask #sqlalchemy #beginners

7 min read

tosane932

Aug 2

🐍 Fixing a `google-genai` Version Mismatch and Verifying the Behavior with pytest [1/3]

#python #flask #pytest #gemini

7 min read

tosane932

Jul 30

✅️ A Truck Driver Built a “Pre-Departure Inspection Gate” — Then Found a Hole in His Tests

#python #pytest #githubactions #beginners

9 min read

tosane932

Jul 30

🚚 Three Coding Near Misses I Experienced as a Truck Driver

#git #github #beginners #productivity

6 min read

tosane932

Jul 28

My Multi-Stage Docker Build Reduced the Image by Only 3 MB

#docker #flask #python #beginners

7 min read

tosane932

Jul 27

The Blinking Toilet Light and My `isProcessing` Flag Were Doing the Same Job

#javascript #webdev #beginners #programming

8 min read

tosane932

Jul 27

Why Did I Spend So Much Time Building a “Driving Personality Test”?

#javascript #webdev #beginners #html

11 min read

tosane932

Jul 26

A Truck Driver Deployed Two Flask Apps to Render After 113 Hours of Learning — The Real Cause of “It Worked Locally”

#python #flask #docker #beginners

7 min read

tosane932

Jul 26

How I Got Blocked 20 Times While Web Scraping—and Found the Fastest Hidden Delivery Route: RSS

#python #rss #beginners #ai

5 min read

tosane932

Jul 26

Testing Data Persistence, Service Name Resolution, and stdout Logging in a Flask and PostgreSQL Multi-Container Environment

#docker #flask #postgres #python

7 min read

tosane932

Jul 26

🐳 A Truck Driver Dockerized Two Flask Apps After 105 Hours of Learning

#docker #python #flask #beginners

7 min read

tosane932

Jul 26

🚛 After 100 Hours of Learning, a Truck Driver Found and Fixed 9 Loading Mistakes in His Flask Code

#python #flask #beginners #programming

10 min read

tosane932

Jul 25

🏎️ Mini 4WD Lane Change Tuning and Python Debugging Follow the Same Problem-Solving Process

#python #debugging #beginners #programming

5 min read

tosane932

Jul 25

"Take the Well-Maintained Road Over Risky Shortcuts": Ditching Web Scraping for an AI App Powered by Official RSS & Gemini (Lessons from Logistics)

#python #flask #rss #ai

4 min read

tosane932

Jul 25

Refactoring My Learning Logs: Why I Rewrote Emotional Notes into Fact-Based Technical Reports

#refactoring #beginners #career #documentation

2 min read

tosane932

Jul 24

24 Days of Coding: An 86-Hour Roadmap from Truck Driver to Web Engineer

#rails #ubuntu #beginners #python

2 min read

tosane932

Jul 24

Deploying Rails 8 on Render Free Tier: Bypassing the 512MB RAM and Read-Only Storage Limits

#render #deployment #sqlite3 #rails

2 min read

tosane932

Jul 24

Why I Dropped the In-Vehicle Local Server Concept and Pivoted to Web Application Development.

#python #rails #git #beginners

2 min read

2 Week Community Wellness Streak

1 Week Community Wellness Streak

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