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Phase F: kicadOpenFile runs on a dispatch context — the awaited-ccall class retired for the open (fcsTotal 1800→100/load)

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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Td4ujboGuAw26jvbDQzehj
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Gergő Törcsvári 2026-08-09 16:32:53 +02:00
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docs/features/async/22-absorbing-libcontext.md
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@ -1241,6 +1241,32 @@ upstream-divergence decision) remove the population. Until then the ring is
the correct containment: bounded at 32, over-capacity silent at the flip, and
the eager path stands ready for any flow that does complete-and-release.
### The awaited-ccall entry class RETIRED for the open path (2026-08-09)
`kicadOpenFile` — the last production member of the overlapped-wake class the
D-on beacon sweep named — no longer parks the main stack. The body is
unchanged; `kicadOpenFileStart` runs it on a DISPATCH CONTEXT (every wait
inside the load becomes a context park through the registry) and resolves an
"open" wait token on completion; the shim conditionally rewraps
`Module.kicadOpenFile` to return the token's plain JS promise, so the shell's
`await` and the busy gate are byte-compatible (older per-app binaries without
the starter keep the legacy suspending export). The F0 early-resolve retention
covers the fast-error path by construction.
**Gates: collab-load-fuzz + mailbox-ordering (the staged parked-open levers)
green — with ZERO `overlapped-wake`/`hot-main-swap-out` beacons where they
always fired; suite 139/1; battery 395/1; repro oracle 3/3 warm loads PASS
with `rootHotTotal=0`, `fiberStackParks=0` — and `fcsTotal` COLLAPSED from
~1800–5000 per load to 97–235.** The load no longer round-trips fiber swaps
through main-stack in-place parks; that order-of-magnitude drop is the
measured shape of "the main stack is the scheduler and nothing else".
Remaining members of the class: the standalone per-app binaries (eeschema.js
etc., rebuilt rarely — conversion rides their next rebuild via the same
starter pattern) and the wx TEST HARNESS pages' direct `ccall` buttons
(harness-only; the interlock and shim capture/restore stay until those are
routed or retired).
### Prod-provider smoke (2026-08-08) — done, with one pre-existing red bisected
Against the live web stack (playwright-web config, reference backend :3060):