C-host retirement plan (WP-UX-14b / WP-GD-05)¶
Status: PLANNING — no C files deleted in Wave 0
Policy: li-native-li-only.mdc
Current C hosts (deploy/studio-demo/native/)¶
| File | Role | Li/wgpu replacement |
|---|---|---|
studio_verticals_present_host.c | CPU framebuffer per-vertical profile chips for MP4 frames | lig wgpu present + RenderReadPixels readback; li-studio-demo swapchain |
studio_shell_present_host.c | SDL present tick for shell demo | lig.present host tick (already partially wired in li-studio) |
studio_viewport_capture.c | SDL grid/particle viewport capture stub | li-render wgpu viewport smoke + tier-2 sim particles in Li |
studio_shell_input_probe.c | Input probe for shell demos | InputState via Li runtime poll or lig window queue |
capture.sh, input_capture.sh, native-sdl-build.sh | Build/capture scripts | Li-native capture scripts only |
On feat/studio-real-implementation (PR #356, not on main yet):
| File | Role | Replacement |
|---|---|---|
studio_shell_paint_fb.c | paint_blit framebuffer for vertical demos | li-render blit paint summary → swapchain (Li path) |
Retirement steps¶
| Step | Deliverable | Replaces | Depends on |
|---|---|---|---|
| 1 | lig wgpu present + RenderReadPixels readback (#342/#346 extended) | studio_viewport_capture.c grid path | PR #356 merged |
| 2 | li-render blit paint summary → swapchain | studio_shell_paint_fb.c (branch) | Step 1 |
| 3 | InputState from Li poll / lig events | studio_shell_input_probe.c | Step 2 |
| 4 | Delete C paint/present hosts; update capture scripts | all rows above | Steps 1–3 |
Scope fence (grandfathered until Step 4)¶
These C files are temporary product fences — do not extend with new features:
studio_verticals_present_host.cstudio_shell_present_host.cstudio_viewport_capture.cstudio_shell_input_probe.cstudio_shell_paint_fb.c(when #356 lands)
New pixel paths: packages/li-studio + packages/li-render + lig.present only.
Timeline¶
| When | Milestone |
|---|---|
| Prerequisite | PR #356 merged to main |
| +1 week | Step 1 readback path green on Linux + macOS CI |
| +2 weeks | Steps 2–3 |
| +1 week | Step 4 deletion + script updates |
Verification¶
lic build packages/li-studio/src/main.li -o build/li-studio-demo
lic check packages/li-studio/li-tests/smoke/studio_vertical_profile_roundtrip.li
LIG_HOST_PRESENT=1 ./build/li-studio-demo
Exit: no product C under deploy/studio-demo/native/ except harness scripts documented as build-only.