# Phase 1.0BC: offline launch-canary cross-build prerequisite audit

Status: `PREREQUISITES_PARTIAL_EXACT_SDL_MATERIALIZATION_REQUIRED`

Date: 2026-07-29

The installed public SDK v0.41, clean public SDL commit, reviewed diagnostic
patch and W^X linker script are present and hashable. The SDK release remains
bound to the upstream lock and the local wrapper resolves to Ubuntu Clang
18.1.8.

The isolated RetroArch worktree has no `build/ps5-sdl2-write-diag/libSDL2.a`.
No matching archive exists elsewhere in the declared Chimera project scope.
WSL also has no CMake or Ninja command at this observation. Reusing an unknown
archive or silently selecting the unpatched SDL tree is forbidden.

The next phase may add and host-test a target-free materializer that accepts
only SDL commit `0baf4ac49382b537ba449901b5b6d0d189bb1fbb`, patch SHA-256
`aa1d3ebc...70c193` and the locked SDK. It must create outputs only in ignored
build storage and must stop before compiling RetroArch. This phase authorizes
neither SDL compilation nor a launch-canary cross-build, artifact or device
action.