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Most teams already keep Playwright or Robot Framework specs next to the product. Manual cases often live somewhere else — a spreadsheet, a cloud TMS, or a wiki page nobody updates after the first release. That is why automation coverage is usually a quarterly guess: the catalog and the specs never share an id. Put both in the same Git repo , give every manual case a stable id, and linking becomes a text match. Any IDE agent can do that if the cases are files it can already see — no custom AI product inside a test tool. One repo, two layers of the same suite Manual cases are YAML files under .gitoza-lite/test/cases/ (VS Code / Cursor extension) or .gitoza/test/cases/ (Desktop app). The filename without .yaml is the case id . Automated tests live wherever your team already puts them — tests/ , e2e/ , robot/ — in the same repository. Traceability is a shared id: put that case id on the automation side as a tag (or name), and on the YAML side as automated: true plus a params pointer. A PR can change the case, the Playwright spec, and the link in one review. Step 1 — Draft manual cases in the IDE Open the repo in Cursor or VS Code. Point the agent at a few existing case files so it learns your title style, tags, and step length. Then feed it a user story, a ticket, or a screenshot. Ask for several cases at once, not one shallow step. A useful prompt looks like: Read .gitoza-lite/test/cases/shopflow/auth/ for format. From ticket SHOP-184, draft three YAML cases (happy path, invalid password, locked account). Filename = case id. Use tags auth and smoke where it fits. Save the files under the suite folder. Then open the Gitoza Lite Test Repository tab to browse, edit, and — when you are ready — run them as a manual suite with Pass / Fail / Skip. The extension does not ship its own model. It keeps cases as plain YAML so whatever assistant you already use can read and write them. A minimal case: --- title : Login with valid credentials priority : high tags : [ smoke , auth ]

Samsung's newest foldables are here. At Galaxy Unpacked, the company announced the Galaxy Z Flip 8, Galaxy Z Fold 8, and Galaxy Z Fold 8 Ultra. All three devices will be available on August 7th, but you can preorder them now starting at $1,199.99, $1,899.99, and $2,099.99, respectively. You probably noticed that Samsung's foldable lineup […]

TL;DR: Use per-test coverage data to build a reverse map (file → tests that touch it). Git diff + map lookup = run only relevant tests. 43min → 4min CI time. The Problem Everyone Has Your test suite runs for 45 minutes. You change one file. Should you: Run all 2,000 tests? (Safe but slow) Run tests with matching filenames? (Fast but broken) Manually tag tests? (Gets stale immediately) We tried all three. They all failed. The Insight: Stop Guessing, Start Measuring What if we just measured what each test actually executes? Coverage tools have done this for years: { "src/MyComponent.js" : { "statements" : { "0" : 5 , "1" : 12 , "2" : 0 } } } Key insight: Coverage tools report per test run, not per test file. All we needed: save coverage after each individual test. The Architecture (5 Steps) Step 1: Instrument the Code // Build config (webpack/vite/rollup/etc) export default { plugins : [ process . env . COLLECT_COVERAGE && coveragePlugin ({ include : ' src/**/* ' , exclude : [ ' **/*.test.* ' ] }) ] } Works with: Istanbul (JS), coverage.py (Python), SimpleCov (Ruby), JaCoCo (Java) Step 2: Collect Coverage Per Test // Test framework afterEach hook afterEach ( async () => { const coverage = getCoverageData (); saveCoverage ( `coverage- ${ testName } .json` , coverage ); }); Step 3: Build the Reverse Map const map = {} ; for (const coverageFile of allCoverageFiles()) { const testName = extractTestName(coverageFile); const coverage = JSON.parse(read(coverageFile)); map [ testName ] = [] ; for (const [ sourceFile , data ] of Object.entries(coverage)) { if (wasExecuted(data)) { map [ testName ] .push(sourceFile); } } } Example output: { "tests/user-profile.test.js" : [ "src/components/Profile.jsx" , "src/components/Card.jsx" , "src/utils/formatters.js" ] } The magic: The test told us what it executed. No parsing, no guessing. Step 4: Detect Tests CHANGED = $( git diff origin/main...HEAD --name-only ) TESTS = $( lookupTestsInMap " $CHANGED " ) npm test $TESTS Step 5: Auto-Up

I'm the author of a paper my friends and I wrote after we were curious if a MUD, text games originating in the 1970s, could be used to evaluate LLMs. We've spent the last several months on nights and weekends running this experiment and writing the paper on just our personal computers with about $99 in API credits. Our experiment did have an interesting leaderboard but even more surprising was the measurements of each LLM. We scored each on four behavioral dimensions, two of which lean heavily o

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-- looks routine in review, locks your table in production: CREATE INDEX idx_orders_customer ON orders ( customer_id ); ALTER TABLE users ALTER COLUMN email SET NOT NULL ; Both of those statements hold a lock that blocks traffic while they scan or build against the table. On a small table you never notice. On a busy production table it is downtime, and a diff review does not catch it because the SQL looks fine. pg-migration-guard is a free tool that reads the migration and flags these before they reach production: $ pg-migration-guard V42__orders.sql WARN IDX01 CREATE INDEX without CONCURRENTLY [becomes a blocker on a large or busy table] Why: Plain CREATE INDEX takes a lock that blocks all writes until the build finishes. Safe: CREATE INDEX CONCURRENTLY idx ON tbl (col); -- outside a transaction WARN NN01 SET NOT NULL scans the whole table under ACCESS EXCLUSIVE Safe: ADD CONSTRAINT c CHECK (col IS NOT NULL) NOT VALID; VALIDATE CONSTRAINT c; then SET NOT NULL; Summary: 0 blocker, 2 warn, 0 advisory Why migrations bite Whether a Postgres migration is safe has almost nothing to do with intent and everything to do with locks. A migration is dangerous when it holds a strong lock while it scans or rewrites a large table. ACCESS EXCLUSIVE blocks reads and writes; SHARE blocks writes. The change that reads fine in review is the one that quietly takes that lock. Put it in CI The most useful place for this is the pull request, so a risky migration fails the build before anyone merges it. There is a GitHub Action: name : migration-guard on : pull_request : paths : [ " db/migration/**.sql" ] jobs : guard : runs-on : ubuntu-latest steps : - uses : actions/checkout@v4 - uses : actions/setup-python@v5 with : python-version : " 3.x" - uses : technical-turtle/pg-migration-guard@v1 with : path : db/migration fail-on : blocker Each finding shows up as an inline annotation on the diff, so the author sees exactly which line is the problem and what the safe rewrite is. Or run it locall

Those who have been following me for a while will know that teaching and mentoring are a Big Deal™️ to me. Before I got into tech I was a teacher, and still consider myself a teacher at heart. Being a teacher and mentor was never separate in my eyes from being a good programmer and engineer; on the contrary, teaching was a tool that helped me become better at my craft at every stage of the journey. But in the last few years, and accelerating in the last few months, the landscape for teaching and learning has been changing at a scary pace. The advent of LLMs and "AI" coding assistants has drastically shifted how we acquire engineering skills in ways that we are definitely not prepared for. All of that has prompted many thoughts and conversations, and I hope to distill some of them in this blog post. In true Talmudic fashion, this post doesn't contain too many answers and will hopefully leave you with more questions than you started with. But asking the questions is how we start these conversations, and these conversations need to be happening if we are to do right by the coming generation of programmers and engineers. Don't Spoon-Feed Me As a student, whether in Yeshiva when I used to spend hours each day poring over dense Talmudic legal debates and esoteric Chassidic philosophy or later while learning Rails and React at the Flatiron bootcamp, I quickly realized an uncomfortable truth about skill acquisition. My best, most profound learning never happened when a lesson went smoothly; it happened when I was painfully stuck, banging my head against a cryptic error message or wrestling with a concept that just wouldn't click (usually at 2 AM, fueled by cold coffee and sheer stubbornness). When you strip away that struggle, you get rid of the growth. And when you get rid of the growth, the learning just doesn't happen. Even if you memorize just enough to pass the test, "easy come easy go." Without that cognitive friction, the knowledge evaporates the moment you close you

After spending 2 years building an image compression tool, here's my no-nonsense format guide. ## The Rule | If it's... | Use... | |---|---| | Logo, icon, screenshot | PNG | | Photo, everyday image | WebP | | Smallest possible file | AVIF | | Maximum compatibility | JPEG | ## Why? PNG — Lossless. Keeps text and sharp edges crisp. Supports transparency. But files are large for photos. JPEG — Works literally everywhere since 1992. Good compression for photos. No transparency support. At 80-85% quality, the visual difference from 100% is invisible but the file is half the size. WebP — The sweet spot. 25-35% smaller than JPEG with same quality. Supports both lossy and lossless. Supports transparency. Every modern browser supports it now (97%+ global coverage). For most websites, this is the right answer. AVIF — The next-gen format. 50% smaller than JPEG, 30% smaller than WebP. Supports HDR, 12-bit color, and both lossy/lossless. The catch: not supported on older devices (iOS 15 and below). Use it with a <picture> fallback. ## Real Numbers I ran the same photo through all four formats at comparable quality: JPEG (90%): 842 KB PNG: 3,241 KB WebP (90%): 547 KB AVIF (90%): 382 KB WebP cut the JPEG size by 35%. AVIF cut it by 55%. ## What I Recommend I built CompressFast ( https://compressfast.site ) — a free browser-based image compressor that handles all these formats. No uploads, no servers, everything runs locally.

Welcome to Day 2! Today we focus on two core pillars of Object-Oriented Programming: Encapsulation: Hiding internal state and requiring all interaction to go through performing validation or controlled methods. Abstraction: Hiding complex implementation details and exposing only a clean, simplified interface to the user. 1. Access Modifiers: Public, Protected, & Private 🛡️ Python does not have strict enforcement keywords like public or private found in Java or C++. Instead, it uses naming conventions and name mangling to communicate intent and protect internal data. ┌─────────────────────────────────────────────────────────────────────────────┐ │ ACCESS MODIFIERS IN PYTHON │ ├──────────────┬───────────────┬──────────────────────────────────────────────┤ │ Level │ Syntax │ Scope / Intended Access │ ├──────────────┼───────────────┼──────────────────────────────────────────────┤ │ Public │ self.name │ Accessible anywhere (inside & outside class) │ │ Protected │ self._balance │ Internal & subclasses only (Convention) │ │ Private │ self.__pin │ Class internal only (Triggers Name Mangling) │ └──────────────┴───────────────┴──────────────────────────────────────────────┘ Public ( self.name ): Fully accessible from anywhere. Protected ( self._balance ): Single leading underscore. Signals to developers: "This is internal—do not mutate or access outside this class or its subclasses." Private ( self.__pin ): Double leading underscore. Triggers name mangling ( _ClassName__attribute ), making it hard to accidentally access or override outside the class. 💻 Code Example: Access Modifiers & Name Mangling class SecureVault : def __init__ ( self , owner : str , balance : float , pin_code : str ): self . owner = owner # Public self . _balance = balance # Protected (convention) self . __pin = pin_code # Private (name mangled) def verify_pin ( self , pin : str ) -> bool : return self . __pin == pin vault = SecureVault ( " Alice " , 50000.0 , " 9876 " ) # Public access works as expected

Yorishiro is an open source project that gives Claude Code / Codex a body-like anime character. The name “Yorishiro” in Japanese means an object inhabited by spirit. My first idea started comunicating with AI agent long time by terminal is very tired. Because AI agent is no face, no expression, no body, and I don’t see they think. So I provided a 3D body and inhabited environment to AI agent. I call it “Presence Harness”. I devise many idea, for example, reflex function. "Aura" is white light mo

Here's what to pay attention to when building a home theater system.

The long-held understanding among security researchers and network defenders is that it's impossible to negotiate in good faith with an extortion racket because there's no incentive for the other side to actually walk away.