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Throwaway, self-contained spike target `packages/kernel/rml-compositing-spike`
(build_by_default:false, not in kernel_dep) proving RMLUi can composite live
client windows. `--verify` reads back the framebuffer headlessly and asserts all
7 criteria; `--run` brings up a real/nested-seat compositor for the user's
real-seat run. All 7 = ALL PASS on this dev box (an Intel Haswell-ULT iGPU on
Mesa crocus — the CF-AX3's GPU class):
1 zero-copy live dmabuf→EGLImage→GL texture sampled by RmlUi, cached (0 reimport
when buffer unchanged); 2 RCSS perspective+rotateY on the live pixels (verified
by readback); 3 screen→surface-local inversion through the 3D transform,
round-trip 0.000000 px (pure core doctested in the kernel suite); 4 surface
tree (toplevel+subsurface+popup) composited correctly → recommend
PER-SUBSURFACE elements (RTT escape-hatch for tree-spanning effects in Phase 1);
5 wallpaper (layer surface) via the identical import path; 6 idle dirty-gate =
0 renders over 120 idle turns, exactly 1 render per commit; 7 present path
FBO→dmabuf swapchain→wlr_scene_buffer with an EGL fence (no glFinish).
Crocus gotchas documented (linear modifiers, AR24 swizzle, cross-context fence,
FBO Y-flip, re-import only on new buffer). Real-seat GO/NO-GO (3D/touch feel,
frame-time @4 windows+video, idle power) is the user's call — runbook in
reports/rml-compositing-spike.md §5.
Also: GLOSSARY rows for "RML compositing" + "surface element" (user-confirmed);
tasks.md slice 13 updated to spike-complete/GO pending real-seat.
kernel suite green; full build clean; spike --verify ALL PASS.
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Slice 10 (stage dock): Stage-Manager-style left-edge dock of minimized-window
previews revealed by a left-edge swipe. Records the Fork-B decision (previews are
toplevel snapshots imported as textures into the RMLUi context, shown as <img> in
one RML document) and the mechanism/policy split (kernel: snapshot + list bindings
+ gesture-claim; ext-xdg-shell: hide/show/geometry/scene_tree; ext-stage-dock:
minimized set, layout, recognition, easing). Adds canonical terms: stage dock,
stage (reserved), preview, favicon, gesture, swipe, minimize, restore, reveal.
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exports WAYLAND_DISPLAY
ext-keybindings (new core ext) reads unbox.toml: tap-Super spawns fuzzel,
Alt+Tab/Alt+Shift+Tab rotate focus across all toplevels, plus Alt+F1 and
Ctrl+Alt+Backspace (quit). ext-xdg-shell's hardcoded keybinds removed
(migrated to the toml).
Kernel setenv()s WAYLAND_DISPLAY at startup so extension-spawned clients
connect to unbox, not the launching session — fixes fuzzel "no monitors"
on the real seat.
build + build-asan green: third-party Mesa/EGL/DRM + vendored-RmlUi sanitizer
noise suppressed (suppressions/), our code stays leak-checked; a real
libwayland leak in the layer-shell client test fixed.
Harness: spawn-env + sanitizer-noise rules, diagnose-real-seat skill,
GLOSSARY keybinding/action/tap-binding. Real-seat verified on the CF-AX3.
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The ui substrate is now the extension-facing contract (unbox/kernel/ui.hpp):
Host::ui() -> UiSubstrate::create_surface(spec) -> UiSurface with typed
scalar bindings (int/double/bool/string getters), data-event callbacks
(error-isolated per extension), dirty(), geometry/visibility — RMLUi and
GL stay kernel-private. Production sync: glFinish replaced by
EGL_KHR_fence_sync + 2-deep wlr_swapchain. ui_spike retired (orientation
guard + dirty-cycle coverage live on as substrate tests).
Input: ONE kernel routing path feeds pointer AND touch into ui surfaces
with consume-or-pass semantics and implicit-grab ownership (the consumer
of a press owns the matching release; per touch point too) — fixes
drag-release-over-ui sticking. touch-mode: state machine + debounce +
on_touch_mode_changed notification, NO visual scaling (user decision
after hardware hands-on; dp-ratio stays 1.0; see plan §2).
ext-xdg-shell: GrabMachine generalized to pointer-OR-touch interaction
source (touch titlebar drag works; originating-point pinning); fixed the
seat implicit-grab leak (suppressed release after forwarded press
swallowed all later touch-downs — pointer/touch alternation doctested);
factory renamed create(). ext-layer-shell: on_demand keyboard
interactivity via scene hit resolution. host-bin: --ui-demo extension
(temporary acceptance demo on the public contract, dies in slice 6).
User hands-on verified: same surface by mouse and finger, tap counter,
touch-mode neutrality, no click-through, drag alternation, fuzzel
on_demand. 113 doctest cases green, ASan/UBSan clean (our code), idle
RSS ≈78 MiB. Harness: UX-feel hands-on lesson (ORCHESTRATOR §2.6),
nested-run pkill/setsid notes, touch-mode glossary redefinition.
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extensions
The kernel now names NO concrete feature. It owns: the extension host
(install/topological activate, missing-dep/cycle = startup error), the
typed Event/Filter bus (error-isolated: a throwing extension is disabled,
never the session; RAII Subscriptions), the Host API (per-extension
facade: borrows, scene layers, event catalogue, typed services), the
public RAII Listener, and a typed surface→scene-tree registry
(Host::host_surface/scene_tree_for) that replaced the untyped
wlr_surface.data convention both extensions flagged.
- ext-xdg-shell (core): toplevel/popup lifecycle, focus-on-map,
click/tap-to-focus, pointer/touch routing incl. button+axis (the
kernel only moves the cursor and emits — a contract-doc lie caught by
user hands-on), interactive move/resize via pure GrabMachine (fixes
the request-arrives-after-release race: grab requires request ∧
button-down, release always ends it), Alt+F1 cycle,
Ctrl+Alt+Backspace terminate (labwc's default A-Escape=Exit killed
the dev session once — never again; see nested-run skill).
- ext-layer-shell (core): wlr-layer-shell v1 (proto v5) for external
clients; pure doctest-hard arrangement core; fuzzel verified visually
nested (fix: seed outputs from output_layout at activate — events-only
tracking missed pre-activation outputs; plus a scene-node double-free).
- First protocol codegen: vendored wlr-layer-shell XML + wayland-scanner
server-header propagated through kernel_dep; wlr.hpp grew a
namespace→_namespace keyword fix for the generated header.
- Glossary: 'scene layer' (user-approved). New rules earned:
parallel-wave-builds, contract-docs.
- User hands-on verified: typing, click-to-focus, drag-select, scroll,
titlebar drag-move (slow + flick), Alt+F1, fuzzel + arrows, touch tap,
Ctrl+Alt+Backspace. 68 doctest cases green, ASan/UBSan clean (our
code), idle RSS ≈73 MiB.
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Constitution (AGENTS.md), orchestrator workflow with the header-contract
read rule and harness-growth duties (ORCHESTRATOR.md), wlroots-seeded
glossary, 4 safety reflexes, owner-agent briefs, 3 skills, and the living
plan (notes/plan.md) with hardware-verified facts, settled decisions, and
the slice 1-9 roadmap (tasks.md). Slice 0 done; next: toolchain bootstrap.
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