fix(core): drop the fixed 10ms trailing-output drain when exit arrives via event

[NathanFlurry]

The sidecar drains process output before emitting process_exited and the
frame stream + event pump are FIFO, so once the exit event is observed no
trailing output can follow it; the host-side quiet-turn drain (2 turns at
10ms) only remains for the snapshot-poll fallback exit path. Also stop
awaiting signal-state refreshes on the exec critical path (start + first
output) — kill paths await the in-flight refresh instead — and clean up
the parked refresh in finishProcess so fallback exits release it too.

Warm host-driven exec p50: node -e '' 30ms -> ~17ms, wasm true 52ms ->
39ms; whole wasm-command-floor lane down ~13ms/row; bench:gate green.
New regression test: 10 sequential fast-exit 64KiB stdout captures.

[NathanFlurry]

Stack for rivet-dev/secure-exec

• fix(wasm): external-command shell redirects write through to their targets #227 msnxyvqr · 2026-07-02 23:29:36
• perf(wasi): cut the shim's path_filestat_get cost 10x #226 opqrluul · 2026-07-02 23:07:48
• fix(website): pin docs-theme to the published v0.3.1 tag #224 urvqxsnp · 2026-07-02 21:47:26
• perf(http2): retain loop rides the net_socket event push #223 zzqtkzpn · 2026-07-02 21:47:25
• perf(net): event-driven loopback socket wakes #221 kpyplspp · 2026-07-02 21:28:07
• test(sidecar): fs.promises metadata semantics coverage #220 vrsntkur · 2026-07-02 21:07:22
• feat(benchmarks): full ecosystem command rows (spec 4.1) #219 soqurlqr · 2026-07-02 20:34:14
• perf(fs): readdir raw fast path + stream writev coalescing (JS lane) #218 xlprnvwv · 2026-07-02 20:29:28
• fix(sidecar): JS-lane reads see kernel-VFS state #217 nxztyxvs · 2026-07-02 19:47:03
• perf(execution): raw wasm module bytes + eager userland compile #216 xusommqr · 2026-07-02 19:08:35
• perf(v8-runtime): parked warm session workers #215 zssyplrp · 2026-07-02 18:53:13
• fix(ci): install build-tools workspace deps in the bench workflow #214 yuvtorxt · 2026-07-02 18:53:11
• feat(execution): snapshot-baked wasm runner userland #213 osswtnlq · 2026-07-02 18:14:10
• fix(core): drop the fixed 10ms trailing-output drain when exit arrives via event #212 qtwvlzny · 2026-07-02 17:46:37 👈
• main

Get stack: forklift get 212
Push local edits: forklift submit
Merge when ready: forklift merge 212

[railway-app]

🚅 Environment secure-exec-pr-212 in rivet-frontend has no services deployed.

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🚅 Deployed to the secure-exec-pr-212 environment in secure-exec

Service	Status	Web	Updated (UTC)
secure-exec	😴 Sleeping (View Logs)	Web	Jul 2, 2026 at 11:24 pm