Set up SimEngine and build my first verified scene with it.

Read https://indiega.me/simengine/llms.txt and https://indiega.me/simengine/agent-guide.md first, then AGENTS.md in the SimEngine checkout. SimEngine is a local C++20 / Vulkan 1.3 engine driven from the command line: there is no hosted API, no API key and no MCP server. Every tool prints one JSON document per command; classify results by exit code, then by error.code.

1. Setup. On Linux run ./tools/setup.sh --install-missing; on Windows 11 (Visual Studio 2022 C++ x64, CMake 3.28+, Ninja, Python 3.12+) run tools/setup.ps1. Expect zero failures among the selected CTest tests and report skips separately. Show me the smoke summary JSON naming my Vulkan device, or the structured BLOCKED outcome.

2. Discover. Run simengine_host --capabilities and tell me the scenario schema version, the commands, components and modules this build has. Use nothing that is not listed.

3. Create. Follow the simengine-create-project skill (https://indiega.me/simengine/skills/simengine-create-project/SKILL.md): create my project OUTSIDE the engine checkout, check it, run it and verify it. Expect PASS, 3 of 3 expectations, three PNG captures and a manifest.json.

4. Change. Follow the simengine-modify-scene skill: add one object, move it with a scheduled command, add an expectation for where it ends, then check, run and verify again. Prove the change: the new final_state_sha256 differs, the new expectation passed and the new capture shows the object.

5. On failure, follow simengine-run-capture-diagnose: report the exit code, failure.code, failure.step and failure.message verbatim, fix only my project files, and say plainly if the render is BLOCKED_ENVIRONMENT (no Vulkan device). Never edit engine sources, tests or examples to get a pass, and never fake a capture.

SimEngine is pre-release: there is no supported physics, collisions, gameplay input, audio, textures or game loop yet. Do not promise or attempt them. Finish with a short report: commands run, exit codes, digests, PNG paths, and what SimEngine could not do.