The cover says everything here is real, including the mistakes. This
is the receipt. Every entry below actually shipped, was actually
found, and is fixed in the page you are reading.
-
The green box with no text in it
Two tokens, --stamp and --stamp-ink, held the
same green. So a filled stamp painted green text on a green fill:
a solid rectangle with the word invisible inside it. The dark
instrument was fine, which is exactly why it survived — it only
broke on paper.
Caught by a reader, not a test. Every contrast check passed,
because contrast maths on the intended pair cannot see a
wrong pair.
-
The fix that was still broken
With the ink corrected, the same stamp carried
opacity: .88 for a faded-rubber look. Opacity composites
the whole element, so the green rendered lighter than the token
said and the pair measured 4.05:1 — under the accessibility
floor, while the numbers in the stylesheet read as passing.
Caught by cropping the rendered pixels and measuring the ink
actually present against its own fill.
-
Two opacities, quietly multiplying
Bottom right of this page there is a running page number. Its
denominator — the /06 half — was set to
half opacity inside a parent already at eight tenths, and
opacity multiplies. It
painted at four tenths: you could see which page you were on and
not what it was out of. Neither number looks alarming alone.
Now the hierarchy comes from font weight, which cannot compound.
-
The graph paper nobody could see
The grid, the vignette, the scanlines and the trace all sit
behind the content on negative layers. The page body had an
opaque background, and an in-flow background paints over
anything on a negative layer. Four decorative layers, rendering
perfectly, into the void.
The paper moved up to the root element and the body went
transparent. One line each.
-
The hand-off that only went one way
The arcade lives on a different origin from this page, so the
chosen instrument cannot travel in storage — it rides on the
link instead. Both sides stamped the link. Only one side ever
read it. Coming back from a game dropped you into whichever
instrument this origin last remembered.
A comment asserting the two shared storage is what kept anyone
from checking. The comment was wrong for months.
-
The button buried by its own toy
Loose specimens can be thrown around the bench, then put back
with a button. The physics floor sat far enough below the bench
that the chips landed on that button and covered it. The
only way to restore them was to reload the page.
The floor came up to the bench edge, and the controls got a
layer of their own.
None of these were found by being clever. They were found by looking
at the page.