docs(readme): hero cast — clean-host hub-pull → fork 100 microVMs#252
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Conversion-funnel move (the "proof first" plan): the README led with prose; a watcher couldn't see the headline claim being true without reading and then setting up a host. This pins an unedited asciinema cast at the top — `forkd pull` a now-portable hub snapshot (post-#242), then fork 100 microVMs: 100/100 alive in ~200 ms wall-clock, ~82 ms of that the parallel restore. Real run, recorded on a clean host (privileged container, no prior forkd state). The .cast is committed alongside the .gif so the artifact is re-recordable in ~60 s when the numbers improve (e.g. once the Firecracker MAP_SHARED RFC lands and the live path needs no vendored fork). Honest caveat in the caption: first pull fetches the rootfs sidecar once; it's cached in this recording. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Proof-first conversion move. The README led with prose — a watcher couldn't see the headline ("Fork 100 microVMs in 101 ms") being true without reading + setting up a host. This pins an unedited asciinema cast at the top:
forkd pulla now-portable hub snapshot (post-#242), then fork 100 microVMs — 100/100 alive, ~200 ms wall-clock (~82 ms of it the parallel restore)..castis committed too, so it's re-recordable in ~60 s when the numbers improve (e.g. once the FC MAP_SHARED RFC lands and live-fork needs no vendored fork).Pairs with the (internal) runner-vs-watcher scoreboard now baselined — the cast is the artifact that gives the unfired r/rust war-story something that converts instead of landing curiosity on prose.
Test plan
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