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Claude 600330e187 fix(daycycle): stage-sized plan layers without a frozen raster; revert #685 hatch

With the day/night background the plan went blurry after zooming from 100 %
(sharp when the page was opened at 800 %) and navigating a strongly zoomed
plan flashed the page white. Both came from #582's composition, not from the
wall hatch that #685 replaced:

- `.stage.daycycle.hp-safe-daycycle-outline .plan-svg` promoted the scene
  with `will-change: transform`; Chromium freezes the raster scale of such a
  layer, so the 100 % raster was shown stretched. The explicit layer #582
  needs is now `will-change: opacity` (re-rasters at the current scale).
- The filtered outline had `overflow: visible` and a gesture exposed every
  scene (#544) without bound, so the promoted layers grew with zoom squared
  (CDP LayerTree, ~460 %: plan-svg 15.9x, outline 13.2x the stage; 39x after
  navigating at 800 %). The full card clips its outline to its box and marks
  it data-hp-live-overflow="clip" (never exposed); the live viewport bounds
  every other exposure with an inline clip-path: inset(-25%) that leaves
  with it, so idle DOM stays byte-identical (#531).

Owner-verified in Chrome 152 (built-in browser, DPR 2): sharp after 100 ->
800 %, no white flashes after reloading at 800 %.

Owner decision: #685's analytic gradient is reverted (13af1d5e), the single
<pattern> is back at every zoom; its close-up golden scenes stay and check
the pattern, its terminal-frame smoke checks the pattern.

Witnesses: demo/smoke_daycycle_zoom_layers.mjs (800 % x DPR 2: layers vs
stage, the hint, reload path, button/wheel/pinch); #582/#532 smokes now pin
the opacity hint; test/live-viewport.test.mjs (bounded exposure, clipped
scene); test/daycycle-layers.test.mjs (cascade). Four Node-guarded mutants.

Issue: #689
User-Visible: yes
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018qZfe7YS4rqEMKoVeS3GKd

2026-09-28 17:51:06 +03:00

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Browser guards mutation registry (#659)

This is the reviewed classification of every mutation witness that still needs a browser. The executable limit is 200; mutation-gate --check, npm run inventory and the unit contract all read this same inventory. A new browser guard must be added deliberately under one reason below, and its mutant because must explain the concrete browser-only invariant.

Converted witnesses are not listed here: their registry guard names an explicit node --test suite plus test/mutation-browser-offload.test.mjs, and every converted mutant is run once to prove that the Node witness actually kills it.

Category	Count	Why a browser is still required
Performance threshold	4	The witness measures real browser wall-time or frame work; a pure assertion cannot prove the budget.
Browser harness integrity	4	The mutation breaks page-error, round-trip or page-registration observation in the browser harness itself.
Paint, cascade and layer composition	26	The invariant depends on computed CSS, SVG paint, clipping, stacking or pixels produced by Chromium.
Pointer geometry and trusted interaction	45	The invariant depends on hit testing, pointer capture, touch/keyboard dispatch or live DOM geometry.
Responsive DOM layout	36	The invariant depends on measured element boxes, responsive breakpoints, native/HA dialog shells or focusable target size.
Custom-element and HA browser lifecycle	85	The invariant crosses Lit/custom-element lifecycle, browser storage/events, lazy loading or a complete HA-card state transition.
Total	200 / 200	Growth above the cap fails `mutation-gate --check`.

Measured effect

The measurements below are GitHub-hosted Linux runs from 2026-09-27. They are recorded separately from the policy limit: the limit proves that browser guards cannot grow unnoticed, while timings show the effect actually observed on the shared runners.

Measurement	Before	After	Observed change
Full-registry wall time	54:18 (1,017 mutants)	48:08 (1,028 mutants)	-6:10 (-11.4%), despite 11 additional mutants
Sum of the six `Each test catches its breakage` steps	4:17:19	4:12:32	-4:47 (-1.9%)
Longest full-registry shard step	50:45	45:13	-5:32 (-10.9%)
Same converted-witness slice, aggregate time	33:43.9	12:07.7	-21:36.2 (-64.0%)
Same converted-witness slice, critical shard	8:05.1	2:19.3	-5:45.8 (-71.3%)

The candidate slice compares the same 83 converted mutant ids in the baseline full-registry log and in the S7 candidate Validate 36316464432. It sums the interval between consecutive per-mutant completion timestamps on each of the six shards. One of the 84 converted ids, active-tab-not-revealed, was the first completed mutant in its shard, so the log cannot isolate its time from clean-guard setup and it is excluded from both sides. The complete candidate run, which also selected registry/tooling mutants outside this converted slice, finished in 10:03.

The original estimate of three to four hours saved on a full-registry run is not supported by this A/B evidence. The directly converted slice is materially faster, but registry growth and shared-runner variance consume most of that gain in the end-to-end total; only the measured reductions above are claimed.

Reviewed per-mutant inventory

Performance threshold

The witness measures real browser wall-time or frame work; a pure assertion cannot prove the budget.

junction-limit-p3-quadratic-again
junction-limit-p4-bruteforce-again
wall-draw-full-preflight-again
wall-draw-wall-artifact-discarded

Browser harness integrity

The mutation breaks page-error, round-trip or page-registration observation in the browser harness itself.

benchmark-page-verdict-unwatched
report-page-errors-skips-round-trip
smoke-guard-blind-to-tail
smoke-guard-forgets-to-register-pages

Paint, cascade and layer composition

The invariant depends on computed CSS, SVG paint, clipping, stacking or pixels produced by Chromium.

daycycle-outline-not-promoted
daycycle-outline-promoted-on-inner-paper
daycycle-static-outline-promoted-on-inner-paper
decor-restored-below-room-fills
device-keyboard-bypasses-click-path
device-long-value-ellipsis-restored
device-unavailable-hover-restored
golden-filled-tunnel-removed
golden-lamp-out-of-reach
hatch-static-renderer-untouched
hatch-stroke-not-scaled
hatch-zoom-compensation-back
iso-first-frame-reveals-flat-during-lazy-load
iso-room-label-44-box-centres-name
iso-sun-card-drops-occluders
iso-sun-flat-wedges-remain
iso-theme-dark-wall-rule-returns
stage3-w4-device-target-loses-44px-floor
stage3-w5-runtime-nudge-writes-storage
stage3-w6-no-borders-keeps-raised-plates
stage3-w7-sun-state-enters-structural-key
sun-ray-origin-cache-ignored
sun-ray-origin-save-forced-inner
value-static-icon-keeps-live-vacuum
value-static-icon-keeps-route-warning
value-static-icon-keeps-vacuum-overlay

Pointer geometry and trusted interaction

The invariant depends on hit testing, pointer capture, touch/keyboard dispatch or live DOM geometry.

align-guides-exclude-dead-source
align-point-reads-frozen-snapshot
decor-default-style-debounce-cut
decor-default-style-seed-cut
decor-keyboard-nudge-drops-focus-dialog-guards
decor-keyboard-nudge-reruns-magnet
dense-device-hit-browser-skips-painted-priority
double-fit-bypasses-canonical-fit-all
furniture-art-editor-adopt-skipped
furniture-edge-handles-steal-the-corner
furniture-exterior-surface-removed
furniture-shift-listeners-not-attached
furniture-wall-runtime-drops-drag-side
furniture-wall-runtime-drops-raw-intent
live-pinch-compositor-demoted-on-active-lit-commit
opening-dimension-overlay-hidden
opening-search-hides-none
opening-search-select-not-wired
placement-accepts-any-mouse-button
reorder-skips-materialization
resize-history-boundary-repair-removed
resize-label-uses-old-room-gear-centre
resize-labels-hide-narrow-area
resize-pointer-capture-removed
resize-preview-reject-silent
room-fit-html-overlay-jumps-ahead
room-fit-pan-release-reaccepted
room-fit-persists-zoom
safe-resize-commit-preflight-bypassed
sections-editor-transition-uses-window-height
sections-grid-drops-stage-flex-chain
sections-grid-falls-back-to-viewport-height
sections-resize-drops-stage-refit-observer
space-card-decor-capability-change-not-adopted
space-card-decor-capability-downgrade-does-not-clear-assets
tab-drag-outlives-the-card
tab-drag-survives-release-outside
tab-drag-target-follows-captured-source
tab-drop-indicator-always-before
tab-drop-outside-commits-last-target
tab-reorder-not-persisted
touch-pinch-marker-hold-rearmed
touch-pinch-zoom-persists-per-frame
unavailable-toggle-stays-silent
wall-draw-rejection-rollback-skipped

Responsive DOM layout

The invariant depends on measured element boxes, responsive breakpoints, native/HA dialog shells or focusable target size.

dialog-ha-disconnected-reject-reopen-enabled
dialog-ha-rejected-close-reopen-disabled
dialog-native-reconnect-recovery-disabled
dialog-native-surface-stretches-to-viewport
dialog-native-update-recovery-disabled
fit-house-hidden-walls-vote
grid-scale-imperial-roundtrip-drift
grid-scale-opening-hit-unscaled
grid-scale-opening-symbol-unscaled
grid-scale-plan-chrome-unscaled
grid-scale-static-factor-missing
header-menu-item-below-44
header-menu-outside-tap-reaches-plan
hidden-room-names-compact-svg-fallback
hidden-room-names-full-svg-fallback
hidden-room-names-iso-override
hp-dialog-ignores-flex-content
panel-readonly-empty-bypasses-write-capability
phone-editor-close-hidden-with-mode-buttons
phone-header-at-tablet-width
phone-header-shows-title
phone-header-wraps
static-card-descendants-hit-testable
summary-dialog-drops-flex-content
summary-picker-hot-add-stays-filtered
tab-editing-without-write-access
toolbar-active-highlight-stops-at-tab
toolbar-close-back-inside-tab
toolbar-close-hidden-at-medium-width
toolbar-close-slot-collapses-outside-editor
toolbar-close-slot-idle-focusable
toolbar-close-slot-leaves-mode-group
toolbar-close-target-below-24
toolbar-device-count-returns
toolbar-mode-zoom-gap-regresses
warm-dialog-drops-transferred-baseline

Custom-element and HA browser lifecycle

The invariant crosses Lit/custom-element lifecycle, browser storage/events, lazy loading or a complete HA-card state transition.

accepted-marker-rolled-back-by-layout-failure
area-relocation-clears-whole-history
area-relocation-loses-position-on-refusal
backdrop-busy-dismiss-races-decision
backdrop-downscale-drops-alpha
backdrop-phase2-falls-back-to-original
backdrop-probe-always-safe
barrier-cache-never-invalidated
camera-anchor-from-presented
camera-cancel-loses-zoom
child-readd-clears-parent-tombstone
cold-view-toggle-delegated-to-runtime
cold-view-vacuum-mapid-delegated
color-picker-confirm-click-through
color-picker-invalid-confirm-latch-removed
config-updated-event-ignored
confirm-dialog-loses-alertdialog
current-rejected-physical-write-keeps-optimistic-wall
danger-confirm-back-into-the-branch
danger-confirm-lost-space-request-guard-removed
danger-confirm-lost-space-transition-cancel-removed
danger-confirm-uses-last-rendered-language-gate
danger-confirm-warm-language-guard-removed
danger-confirm-warm-transition-cancel-removed
daycycle-programmatic-camera-skips-safe-outline
device-echo-keeps-local-noncanonical
device-focus-tooltip-blur-cleanup-removed
device-focus-tooltip-handler-removed
device-focus-tooltip-room-hover-overwrites
device-inbox-batch-rollback
household-enter-stops-acting
household-marker-drops-keyboard-reach
device-markers-rendered-without-keys
device-pointer-leave-clears-focus-fallback
device-position-cancel-routed-to-commit
discovery-reset-writes-a-copy
editor-neutral-escape-does-not-exit
empty-space-cleanup-disabled
fixed-floor-transition-guard-bypassed
french-locale-wrong-dictionary
hp-dialog-escape-does-not-close
junction-limit-baseline-cache-stale
junction-limit-candidate-fail-open
junction-limit-write-gate-removed
locale-failure-toast-dropped
marker-reject-keeps-optimistic-candidate
marker-rollback-keeps-enqueue-time-revision
namespace-loader-returns-english
near-axis-authoring-snap-bypassed
onboarding-loader-skips-namespace-ensure
openings-rendered-without-keys
plan-only-preview-label-hidden
plan-room-area-icon-hidden
plan-room-area-icon-navigates
plan-upload-client-limit
plan-upload-guard-original
plan-upload-reduced-over-limit-staged
post-write-tail-runs-on-refused-gate
readonly-view-syncs-new-devices
render-invalidation-renders-irrelevant-ha
reopened-room-from-registry-space
room-accept-leaves-coincident-partitions
room-gear-second-touch-keeps-drag
room-settings-click-does-not-open
room-tooltip-off-skips-pointer-modality
same-space-room-change-recenters
space-create-hidden-display-override
stairs-view-pan-opens-target-floor
support-invalid-response-leaks-issued-token
support-stale-preview-response-revives-consent
support-timeout-claims-success
vacuum-overlay-back-to-the-dock-space-filter
volumetric-kiosk-ignores-setting
view-current-space-aria-removed
wall-face-apply-skips-overlap-guard
wallthick-hit-narrowed
writer-history-skips-finished-chain-normalization
zigbee-topology-endpoint-cleanup-skipped
zigbee-topology-endpoint-elevation-removed
zigbee-topology-hovered-endpoint-elevation-removed
zigbee-topology-overlay-double-live-projection
zigbee-topology-overlay-layer-lowered
zigbee-topology-unknown-casing-gaps-filled
zigbee-topology-unknown-casing-removed
zigbee-topology-unrelated-markers-raised

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