Development Update — May 21

A routing-correctness day. The local-route calculator gets a proper N-hop BFS so multi-hop local routes are found deterministically and honor a minimum hop count, and the mux-bandwidth and ping paths get a round of race fixes and failure-surfacing so the measurements are trustworthy.

Skywire: Local Routing — Deterministic N-Hop BFS

When a route can be assembled from transports the visor already knows about (without consulting the route-finder service), it does so locally. That local calculation needed to be both correct and deterministic.

2755 feat(router): N-hop BFS in calculateLocalRoutes — deterministic local routing — calculateLocalRoutes walks the local transport graph with a breadth-first search out to N hops, producing routes deterministically rather than depending on map iteration order.

2753 fix(router): calculateLocalRoutes must honor MinHops > 2 + 2758 fix(router): local-route BFS visited-set was shadowing longer paths — two correctness fixes on that BFS: it now honors a MinHops greater than 2 (so a caller asking for a longer overlay path isn’t handed a short one), and the visited-set no longer marks a node so early that it shadows valid longer paths through it. Together they make the local calculator return the routes a multiplexed/min-hops dial actually asked for.

Skywire: Mux-Bandwidth + Ping — Trustworthy Measurement

Yesterday’s measurement surface gets the fixes that make its numbers reliable.

2754 fix(rpcgrpc): mux-bw probe-after-pump race + per-level LevelDone counters + 2756 feat(rpcgrpc/mux-bw): surface pump-phase route failures as MuxRouteFailure events — a race between the bandwidth pump and the follow-up probe is closed, per-level LevelDone counters are added, and a route that fails during the pump phase now surfaces as an explicit MuxRouteFailure event instead of silently dropping out of the average. A multiplexed measurement that quietly loses a path overstates per-path health; making the failure visible keeps the number honest.

2757 / 2761 / 2762 — ping plumbing — PingOnceWithEcho forwards RouteIndex + MinHops (so a ping measures the route the caller meant), the ping.mu critical section is narrowed to just the map lookup (less contention on a hot path), and write deadlines are added to PingOnceWithEcho plus a RouteIndex passthrough on the probe.

Skywire: Skynet Client / CLI

• 2759 fix(skynet/client): accept loop with per-conn remote dial + half-close drain — the client accept loop dials the remote per-connection and half-closes to drain buffered bytes on teardown (the same drain-don’t-truncate pattern applied on the server side).
• 2760 fix(cli/skynet,visor): list custom-named skynet apps + render AppStatusStarting — custom-named skynet apps show up in the listing, and the transient AppStatusStarting state renders instead of looking like nothing is happening.