Files
hyperframes/packages/engine/src
Vance IngallsandClaude Sonnet 5.5 38f6e01c2b feat(core,engine): report why blur is off, and what each render session did (#5991)
Tooling and logs need more than "off". Give the runtime's report a reason
code for every way blur can be off (renderer-off, unsupported-browser, each
html-in-canvas defect, capture-failures), and two calls for tooling:
probe() runs the same scan a render would, without painting, and suspend()
stops all painting for the rest of a session without changing the reported
decision.

The engine prints one line per session from what the page reports:
`[motion-blur] on reasonCode=null movers=N failedFrames=K`. The first-frame
line cannot know about later failures, so the session end prints the same
line with "(session end)" when any frame fell back to plain DOM; a clean
session stays quiet. A render where every capture failed no longer reads as
"on" with nothing else.

Add the first test that reads blurred pixels: real Chrome with
html-in-canvas, the engine's frame order (seek, wait, composite, screenshot).
It checks the trail along the motion line, that what does not move matches
the sharp frame, that a box centered with translate is blurred where it
really is, and that a flipped backface card renders the plain frame. It
skips when Chrome or html-in-canvas is missing.

Folded review fixes: R13 (runtime half), R17 (engine half), T1 (the guards
that need reason codes), T3 (log-line and pixel tests).

Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-21 15:06:36 -07:00
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