This tab is a conformant wai.world.replay sink. The kilobytes that arrived are a
tick-0 world + a signed op log; every frame below is re-derived locally by the same Rust engine
(compiled to WASM) that generated the conformance corpus. At the sealed final tick the sink
recomputes the BLAKE3 state hash and checks it against the publisher's Ed25519-signed seal.
What you are looking at: not a video, and not an approximation. The wire carried instructions —
a deterministic world and signed causal ops. Replay-equivalence (extensions/interactive-worlds §7) means
every conformant sink, on any hardware, derives the bit-identical state at every checkpoint: the hash in
this HUD is the hash in world-conformance/expected_hashes.json. In truss_fracture,
two actors pull the same member in opposite directions at the same tick; both impulses act (the SUM
conflict rule), the member's strain exceeds yield, and it fractures — structural failure as a solver
consequence, identical on every machine that ever replays it.