Portfólio
Sep 28, 2026
Portfolio — the proxy that closed the door and still saved the form
How a custom domain missing from Capivara's allowed origins killed the contact form, and the same-origin proxy that brought tracking back.
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portfolio
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Portfólio
Sep 16, 2026
The port that was not mine
The portfolio test harness measured contrast on a port. When the address came from an environment variable, the branch server never started, and something else answered there. The test never lied. It just answered a different question.
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Portfólio
Sep 11, 2026
The tailored résumé that doesn't exist yet
My portfolio's next feature isn't live yet: an AI-powered generator that rewrites my résumé around a job description. Before it becomes a button, the hard part was already solved — and it isn't generating text. It's keeping the AI from describing experiences that never happened.
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Portfólio
Sep 11, 2026
The application factory that doesn't exist yet
The Resume Tailor is back in the tree, but every tailored résumé is still handcrafted: open the site, describe the job, review, save, send. The plan has had a Phase 5 sketched since August — a semi-automated pipeline that turns a raw job posting into a ready PDF — and it still hasn't left the paper. On the difference between shipping a tool and shipping a habit.
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Portfólio
Sep 10, 2026
Eleven PRs in one afternoon — the day the bot became a teammate
Nine libraries, a test runner major bump and a GitHub action updated in a single day. What it took to merge 11 dependabot pull requests on the Portfolio without breaking the suite — and the one that almost turned into a false alarm.
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Portfólio
Sep 05, 2026
The footer that lied twice
React hydration error #418 in the portfolio footer, a mystery that only happened at night: the server renders in UTC, the visitor in local time, and a new Date() in JSX gave each of them a different answer. The hunt for the useState(null), the pinned timeZone, and the epilogue where I myself created a second bug while fixing the first.
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Portfólio
Sep 02, 2026
The typewriter that erased its own text
The portfolio hero typed, erased, and retyped — not as an effect, but as a bug: deferred hydration mounted the component and reset the text already on screen. The story of how LCP dropped from 3.6s to 2.7s by removing idle-hydration from the wrong place.
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Segurança
Aug 28, 2026
The sentry at the form — when the portfolio learned to defend itself
Every public site has a front door: the contact form and the resume download. Two endpoints that accept input from strangers on the internet — and I finally treated them as such. Rate limiting, HTML escaping, a contact file for people who find flaws, and a scanner that watches everything in silence.
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Portfólio
Aug 25, 2026
The circle that would not close — flushSync and the Portfolio View Transition
When the theme toggle animation revealed the old theme instead of the new one, the fault was not in the CSS — React had not committed the state in time.
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Portfólio
Aug 19, 2026
The CDN cache fighting the ISR — and holding the TTFB at 3.6s
A wrong Cache-Control header in vercel.json was overriding the revalidate=1800 ISR setting and turning every cache expiry into two synchronous GitHub calls inside the TTFB. The story of how cold cache became warm: 3.6s down to 140ms.
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Portfólio
Aug 14, 2026
The projects region — when the filter lost to simplicity
The portfolio's projects section almost got a category filter. It didn't — and that was the best decision. The story of a 2-column grid that resisted the lure of complexity.
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Portfólio
Aug 11, 2026
The 61 vulnerabilities that became 2 — the art of the surgical override
pnpm audit on the Portfólio screamed 61 vulnerabilities. Instead of updating dependency by dependency or trusting audit fix, I solved it with 5 lines of pnpm.overrides in package.json. Result: 61 → 2, with the remaining 2 having no published fix at all.
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Portfólio
Aug 04, 2026
The ghost of mobile cache — bfcache, pageshow, and the tab that refused to update
Portfolio was 100% functional, 218 tests passing, zero CI errors. But mobile Chrome users saw old versions when restoring tabs. The cause: Chrome's bfcache ignores HTTP headers — and the fix came cross-project from LifeLog.
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Portfólio
Aug 03, 2026
The deploy that broke on its own — pnpm, audit fix and ERR_PNPM_EEXIST
Nobody touched the code, yet Vercel kept rejecting the build: ERR_PNPM_EEXIST. The cause: a security cron ran pnpm audit fix with the Windows pnpm, regenerated a v10 lockfile while packageManager declared 9.12.3 — the saga of aligning local pnpm, packageManager and CI.
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Portfólio
Aug 02, 2026
The story of the Portfolio — from Mission Control to sci-fi with 529 commits and 218 tests
529 commits, 218 tests, 5 mini-games, multi-layer parallax scene, interactive terminal with 15+ commands, full PT/EN i18n — the journey of a portfolio that became an interactive showcase.
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Portfólio
Jul 28, 2026
The Quality Week — 10 fixes my portfolio deserved
Broken Pix BR Code, focus trap stealing keyboard input, scroll jumping sections — a deep audit fixed everything at once.
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Portfólio
Jul 28, 2026
The QR Code That Didn't Pay — String.fromCharCode, Control Codepoints, and an Invisible Pix
I added Pix to my portfolio with BR Code generation. Only the QR Code didn't work in any banking app. The culprit: String.fromCharCode generating control characters instead of decimal digits in EMV 2022 length fields.
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Portfólio
Jul 28, 2026
Portfolio — the July audit that turned into spring cleaning
July 2026 was the month my portfolio stopped getting new features and started fixing the ones it already had. A deep audit revealed 10 problems — from Pix to focus trap — and by the end, deployment was more automated than ever.
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Portfólio
Jul 06, 2026
5 improved games — the day the portfolio became a showcase
Exploring the portfolio games — lessons learned, challenges and discoveries.
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Portfólio
Jun 25, 2026
Samuel's Portfolio — the redesign that sought identity
After building tools for others, I decided to dedicate time to my own space. A portfolio that is more than a resume.
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Portfólio
Jun 20, 2026
Portfolio v3 — Vue 3.5 + Vite 8, the rebuild I needed
Exploring the portfolio rebuild — lessons learned, challenges and discoveries.
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