- the lamppost halo stops stacking after a short-range teleport: bevy registers `add_visibility_class::<Mesh3d>` as an add hook that pushes the mesh's class id onto the entity's `VisibilityClass` list on every (re)add, nothing dedups the list, the required component survives a `Mesh3d` removal, and `check_visibility` queues an entity once per entry — so 1949's parking, which removes `Mesh3d` after thirty hidden frames and re-adds it the frame the part is shown, drew a part one more time per hide-then-show cycle; opaque parts hide it at the same depth and colour, an additive glow card adds itself to itself (×2 after the first teleport that hid the lamp for half a second, ×3 after the next), and a loading screen despawns the tiles and respawns fresh entities, which is why a far teleport and a relog never showed it; the unpark queues one dedup after the hook, the test registers bevy's own hook and requirement in a bare world and reads 2 entries without it and 1 with, and on the rig, with the away camera facing the lamp past a 177 yd far clip, a build without the dedup read `stacked_parts=278` after one hop back where the landed build reads 0 (2003, 2005); the instruments that excluded the other mechanisms stay — the inspector's glow-card line names the material's additive bit, fade/unlit flags, depth write, texture residency, tag alpha and live scale, `STACKED n` on the card and `stacked_parts=` on the probe line count the duplicated class lists, and screenshot and pick bursts now keep the rig window awake, because an occluded window recaptures one stale drawable and a day of A/Bs had read identical to the decimal
- `perf::blend_check` reads the half of a glow card's look the material cannot: per `Transparent3d` item, the pipeline descriptor's colour blend against the material's additive marker — the marker folds the radial alpha into the colour in the shader and gives the pipeline its pure (ONE, ONE) add, and 0071's wrong-pipeline class was immunised only for opaque batches; mismatches count into the perf pill as a red `blend xN` the frame they happen, ride the probe line as `blend_mismatch=`, and are tracked across frames and named — object, texture, which pipeline, PERSISTING; its own first harvest was the tracker: an additive material realized this frame is extracted, prepared and drawn this frame, and a tracker reading the `Added` event a frame late called every first draw a mismatch, so it runs after `AssetEventSystems` like bevy's own specialization check; and the hook-accumulation sweep states the class so it can be swept: bevy 0.18.1's insert path fires `on_add` only when the component was absent, `on_replace` on every outgoing value, `on_remove` on removal only — a push on `on_add` accumulates across remove→re-add, a free on `on_remove` leaks across an insert-overwrite; every hook in the bevy crates we link (the visibility class on `Mesh3d`/`Mesh2d`/`Sprite`/`Text2d`/`MeshletMesh3d`, the cluster class on every bevy light) and every removal of a hooked component in our tree was read, parking's `Mesh3d` is the only accumulating pair, the UI quad pools reuse entities by insert-over and fire no add hook, and the one asymmetric freer, `PropProbeSlot`, freed its probe slot on `on_remove` — an insert over a live slot leaked it for the session, held off by a remove-then-insert discipline at the one re-seat site; it frees on `on_replace` now (`RigSkin`'s shape), the re-seat is a plain insert, and a test overwrites a live slot and reads it freed (2005)
- the stance bar loads after everything the managed-position pass reads: the stock `ShapeshiftBar_OnLoad` shows the bar, its OnShow runs `UIParent_ManageFramePositions`, and the stock pass indexes `ReputationWatchBar` unguarded — our manifest seated the bar beside the other bar files where the reference's toc has it at l.74, after the reputation frame at l.57, so the pass raised at `UIParent.lua:1618` on every login and never reached the arm that seats the shelf: the red login error and the sliver above Defensive Stance (the shelf's plate at its XML anchors, a few pixels off its seat, healed by any bottom-bar toggle re-running the pass) were one defect from 1988, whose retired copy of the pass had guarded every read — and the three-form case 2000 could not reproduce; the bar sits at the manifest's tail right before `WorldStateFrame.xml`, whose own OnLoad runs the pass and indexes the shelf textures the stance bar declares — the reference's own reason for l.74 before l.89; a manifest test states the law with the pairs read off the pass's body, and `load_default_ui` now folds the VM's handler errors into its failures, because a raise one call below an OnLoad landed only in the VM's error list and shipped through the manifest test, the full-manifest harnesses and the smoke's WARN alike (2001)
- `UnitName` answers `UNKNOWNOBJECT`, never nil, for a resolved unit whose name is still in flight: a hunter casting Call Pet with the stable window closed got `PetStable.lua:129: attempt to concatenate a nil value`, because stock `PetStable_OnEvent` repaints on `UNIT_PET` without asking whether the frame is shown and the paint concatenates `UnitName("pet")` the instant `UnitExists("pet")` is true, while the pet's name is a `CMSG_PET_NAME_QUERY` round trip away; the reference's `UnitName 0x517020` pushes nil in exactly two cases — the `"player"` fast path (`0x517083`) over an empty name buffer, and a token that resolves to GUID 0 (`0x5170c0`) — and every other path ends in a string: `CGUnit_C::GetUnitName 0x609210` looks the pet up in `petnamecache.wdb` by `UNIT_FIELD_PETNUMBER`, re-sends the query on a miss or a stale stamp, and falls to `0x609324`, the GlobalString `UNKNOWNOBJECT` ("Unknown") read through `0x703bf0`, or the literal `"Unknown Being"` at `0x860fa4` when the global is missing or empty; the binding now reads the global out of the VM's `_G` at call time, so a translated `GlobalStrings.lua` translates this too, the stock file is untouched, and 1688's "nil for an unresolved name is faithful" is corrected — the reference paints `Unknown Level 58 Boar` into the hidden frame and the next repaint reads the name; `GameTooltip:SetUnit` still titles a pending-name unit with an empty line, a next move (2002)
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
