[NotRexed]

Main doesn't link since #1720 merged. The AppImage job says:

hookshot_vk.so has 2 unresolved symbol(s); it would not load:
    _ZN5mkwvk14present_commitERKNS_14PendingPresentE
    _ZN5mkwvk18present_defer_intoE

Why: #1720's last commit (a259978) reset vk_replay.cpp to main's copy so main could be merged in, with "present ahead re-applied next". The PR was merged before that re-apply. Main ended up with:

• vk_framegen.h declaring present_commit and present_defer_into;
• the display thread in vk_framegen.cpp calling them;
• no definitions anywhere.

Fix: put back the 24 lines from the PR's previous head (7006ea0) on current main:

• the present_defer_into thread-local;
• present_image's deferral after its copy's submit;
• present_commit;
• present_image's present split out as present_out.

Main's present_image now checks vkQueueSubmit2 for device loss, and that check stays ahead of the deferral.

Present ahead only runs for a paced 2x frame-generation set with two spare swapchain images (#1720's conditions). Everything else presents through present_out exactly as before. CI compiles and tests it here, including tests/test_present_ahead.py, which reads bool present_commit( from vk_replay.cpp. I'll check frame generation 2x pacing in game before relying on it.

🤖 Generated with Claude Code