The big one
A passive, energy-positive house
From bare land to delivery: Revit learned solo, the building permit filed myself, and a house that produces more than it consumes.
Software engineer · Normandy, France
Guillaume
Couillard
I love to build. Software, websites, and a passive, energy-positive house. This site is both my business card and my playground: handmade, with an AI copilot, and as fast as only a static site can be.
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Builds
Code, websites, a house.
The same pleasure every time: start from nothing, learn what it takes, ship something that holds.
Pro bono
Websites for real people
A Norman village's website, a young graduate's portfolio: built for free, in production, with real users.
This one
This site, in tandem with an AI
Static, cookie-free, guarded by build safeguards. The showcase and the proof, in a single object.
The signature page
There are several of us.
A pioneer of New France, a Davis Cup captain, a senior health official, and me. Carrying this name comes with standards.
1627
The first plough ever pulled in Canada was pulled by a Guillaume Couillard.
70
Points: the longest known tie-break in professional tennis.
2026
A namesake takes charge of healthcare organisation in France.
4
Notable Guillaume Couillards. At least.
Labs
Demos, not slides.
01
Flux
The vector field animating this page, full screen. Vanilla 2D canvas, zero dependencies, 60 frames per second.
02
The namesake timeline
Four centuries told through scrolling, animated with pure CSS. No animation library involved.
03
This site itself
Static, no client framework, no cookies, built in tandem with an AI. The colophon tells all.
Notes
Things I just learned.
Note
Scroll-driven animations without a line of JavaScript
What animation-timeline: view() changes, and how this site uses it.
Note
A 2D canvas flow field at 60 fps with zero dependencies
The anatomy of this site's hero: pseudo-noise, particles, and the three optimisations that matter.