Skywire Development Update — August 26, 2026

A day built around one idea, taken from RFC to on-by-default before it is out: per-frame noise for mux aggregation. Rather than striping a route group’s single noise-encrypted byte stream across legs and reordering it back together on the far side, noise is applied per frame, so each frame decrypts on its own and legs aggregate a single stream with no cross-leg reordering at all — the root of the reorder-buffer hazards the data-plane fixes have been chasing. Around it: a routing lock fix, the visor-state fields to actually watch the new path work, and a cluster of CI and skysocks housekeeping. The afternoon kept building on the new path: warm-standby aux legs, live mux control, the no-skip reorder rule that ends a stream-corruption class, and a predictive scheduler.

Skywire: Per-Frame Noise Inverse-Mux

4218 is the RFC for single-stream mux aggregation via per-frame noise, and 4219 implements it, environment-gated. The existing mux splits a route group’s noise-encrypted byte stream across legs, which forces the receiver to reorder across legs before it can decrypt. The inverse approach applies noise per frame, so each frame is independently decryptable and legs aggregate a single stream without cross-leg reordering. Once measured, 4220 drops the environment gate and turns it on by default, and 4225 fixes the handshake so each side only writes its KK message on its own turn rather than both sides writing at once.

Skywire: A Routing Lock Fix

4217 stops holding the router’s r.mx mutex during the accept send in IntroduceRules, so a slow accept can no longer block the rest of the routing table behind the lock.

Skywire: Watching the New Path — Wider Visor State

To make the per-frame path observable in state rather than only in logs, 4226 exposes per_frame_noise on route groups in visor state and mux info, and 4227 widens visor state further with mux distribution, reorder and aggregate-byte counters plus per-transport byte totals.

Skywire: Skysocks and CI Housekeeping

4222 breaks the skysocks IPC read loop on error instead of spinning on it. On CI, 4221 moves to the latest Go (1.27.0) and golangci-lint (v2.13.1), while 4223 keeps go.mod pinned to the minimal required Go (1.26.4) rather than the CI toolchain version, and 4224 has the publish-binary step upsert the rolling release instead of delete-before-create.

Skywire: The Reorder Buffer Never Skips a Gap

4228 has the initiator offer per-frame noise on its very first handshake, not only on re-handshakes. 4238 changes the reorder buffer’s contract: it never skips a gap — a missing packet is retransmitted in order rather than flushed past, which fixes a stream-corruption class — and 4239 sizes the buffer to the path’s bandwidth-delay product and drops rather than skips at the memory cap. 4233 adds a timer-driven flush so a stalled leg degrades gracefully instead of freezing the stream.

Skywire: Warm Standby, Live Control and a Predictive Scheduler

4230 puts newly added aux legs into warm standby, promoted at the engine’s pace instead of dumped straight into the active set, and 4234 adds live mux control — mode, cap and width adjustable on a running route group — plus a goodput-weighted ramp. 4240 introduces the ECF predictive scheduler (proxy mux mode ecf), 4244 allows removing the primary mux leg (the group re-homes onto a survivor) for exact route control, and 4243 adds proxy start --route to pin explicit routes at session start.

Skywire: Watching It Work

4229 puts per-leg goodput on the proxy status page, the proxy tree view and the mux JSON, and 4232 splits it into up/down with per-direction share bars and fixes the direct leg’s rtt. 4231 adds per-visor transport-discovery stats to the CLI, 4241 bounds the service-health probes so one dead endpoint can no longer stall visor state, 4236 fixes the mux cap/width confirmations, and 4235 and 4237 clear lint.