- Sim facade (bound as `sim`): start(tag) arms the sim, dispatching 14a/15693 by tag
type; stop(), push(tag) -> tag.sync(), frames -> decoded trace
- SimResource: opens SimSession on load, closes on exit; a missing device is non-fatal
- one connection mode per workspace (reader OR sim) — the second is refused (serial contention)
- sim.push added to the write effect patterns (withheld on autoreplay)
Arming stays explicit. Hardware-free tests via injected sessions.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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