Files
houseplan-card/docs/testing-notes/mutation-browser-guards.md
T
Codex 9825819cd4 feat: LED strips — editor notes, docs, demo, smokes, golden scenes, profile (#780)
Stage 5 of #780.

- Import summary: «Strips left unbound after import: {n}» from the backend
  `unbound_led_strips` count; «Optimize plans» reports strips passing
  through walls per space and edits none (AC16).
- Linear field for long strips (ТЗ §13.2): pieces of at most the radius
  along the polyline, emitters thinned to r/4, each piece clipped to the
  visibility fans of its own emitters as separate clipPath children (no
  boolean pass per piece), one floor clip for the whole layer, no fan at
  all where nothing blocks within the radius; a grid index of body faces
  and boxed inside tests; unchanged fields skip re-diffing. 50×50 on the
  large house: first stable frame ~1.4 s, warm space ~1.1 s locally.
- led-strips-v1 profile: demo/benchmark_led_strips.mjs with the derived
  large-house fixture (10×5, 50×50, none), absolute limits of the ТЗ table
  in demo/performance/budgets-led-strips.json, exact counters (zero
  recomputes on HA ticks/camera/colour, ≤50 cache entries, no growth over
  20 cycles); added to the full performance workflow.
- Bundle: LAZY_LED_GZIP_CEILING 10 KiB, LAZY_LED_EDITOR_GZIP_CEILING 11 KiB
  (measured + 10 %, rounded up); overlaps with the initial and editor
  graphs refused; the lazy editor graph stays inside its ceiling.
- Smokes smoke_led_strip_draw/bind/glow, linked in smoke-links; 13 mutants
  in the registry (7 browser guards in the inventory); config field registry
  entry `spaces[].led_strips`.
- Golden: five new scenes on the `golden-led` space of the visual fixture
  (`ledStrips` option, the designer's four strips on #868D94), matrix v71.
- Docs: LIGHT, DEVICE-PRESENTATION, USER-GUIDE (en/ru), UX-MODES,
  ARCHITECTURE, ISOMETRIC, CONFIG-COMPATIBILITY, TOUCH-SUPPORT, demo/stand
  README, performance README; docs/design/led-strips with the unchanged
  designer archive, two paired frames and ACCEPTANCE.md; both changelogs.

Issue: #780
User-Visible: yes
2026-10-02 13:35:11 +03:00

13 KiB

Browser guards mutation registry (#659)

This is the reviewed classification of every mutation witness that still needs a browser. The guideline is 200 (#699: a guideline, not a wall); 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 30 The invariant depends on computed CSS, SVG paint, clipping, stacking or pixels produced by Chromium.
Pointer geometry and trusted interaction 47 The invariant depends on hit testing, pointer capture, touch/keyboard dispatch or live DOM geometry.
Responsive DOM layout 38 The invariant depends on measured element boxes, responsive breakpoints, native/HA dialog shells or focusable target size.
Custom-element and HA browser lifecycle 100 The invariant crosses Lit/custom-element lifecycle, browser storage/events, lazy loading or a complete HA-card state transition.
Total 223 / 200 Above the guideline mutation-gate --check warns rather than fails (#699); each guard above it is held by its own reason in this inventory and its because.

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
  • led-core-coloured-under-glow
  • led-icon-not-suppressed
  • led-source-stays-round-at-anchor
  • led-unbound-in-view
  • 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
  • led-pan-adds-point
  • led-pinch-calls-action
  • 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
  • warm-resume-collapses-pending-header
  • warm-memo-publishes-torn-header-stage-pair

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
  • 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
  • floor-geometry-key-global-epoch
  • floor-geometry-key-ignores-content
  • french-locale-wrong-dictionary
  • household-enter-stops-acting
  • household-marker-drops-keyboard-reach
  • hp-dialog-escape-does-not-close
  • junction-limit-baseline-cache-stale
  • junction-limit-candidate-fail-open
  • junction-limit-write-gate-removed
  • led-auto-slot-reserved
  • locale-failure-toast-dropped
  • marker-reject-keeps-optimistic-candidate
  • marker-rollback-keeps-enqueue-time-revision
  • moon-static-clock-tick-off
  • 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
  • render-reconcile-restarts-editor-runtime-cycle
  • 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
  • rooms-rendered-without-keys
  • rooms-rendered-without-space-key
  • same-space-room-change-recenters
  • space-card-rooms-rendered-without-keys
  • space-create-hidden-display-override
  • stairs-view-pan-opens-target-floor
  • stairs-view-tread-lines
  • support-invalid-response-leaks-issued-token
  • support-stale-preview-response-revives-consent
  • support-timeout-claims-success
  • vacuum-overlay-back-to-the-dock-space-filter
  • view-current-space-aria-removed
  • volumetric-kiosk-ignores-setting
  • wall-face-apply-skips-overlap-guard
  • wallthick-hit-narrowed
  • warm-late-resume-beats-user-mode
  • warm-late-resume-crosses-space
  • warm-pan-during-runtime-keeps-refit-blocked
  • warm-pending-mode-leaves-revive-waiting
  • warm-resume-camera-depends-on-dialog
  • warm-resume-overwrites-view-return-camera
  • 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