Each fresh stats poll reports a snapshot of connected station interfaces in stats.wifi and info.wifi. Map keys identify interfaces, not networks. s is optional SSID metadata; r is nullable native RSSI in dBm. Quality percentages are never converted to dBm. An associated interface without an accessible RSSI still appears with an unavailable signal. No scans or network changes occur.

The hub panel gates exclusively on current systems.info.wifi and system up status, independently of the selected historical period. Empty/null snapshots clear it. Historical averages use only available readings per interface; gaps are not zero signal. Interface colors and keys remain stable on reconnect. SSID in an aggregate is the latest observed metadata, not a separate series.

Platforms

Linux: native nl80211 through github.com/mdlayher/wifi, compiled into the static agent, including scratch and all other agent images. No iw, shared libraries, extra capabilities, or external helper required. Host network namespace access (Docker network_mode: host) is necessary to see host Wi-Fi. Only managed station interfaces with explicit associated BSS status appear. Kernel BSS cache reads do not trigger scans; station statistics supply native RSSI matched to the associated AP. Denied/missing station statistics retain association with unavailable RSSI, never substitute stale scan-cache signal. Missing nl80211/driver support or denied association reads yield no readings. A single two-second socket deadline bounds enumeration and interface queries after opening the client. The library's initial nl80211 family discovery is synchronous and does not expose a deadline.
macOS: system osascript uses public CoreWLAN via JXA. Station mode proves association; RSSI and optional SSID are read independently. No private airport binary, elevated command or compiled helper required. Privacy settings may redact SSIDs. The subprocess has a two-second deadline.
Windows: native WLAN API, interface GUID identity, connected interface state, optional current-connection SSID and native RSSI query. No localized netsh parsing. Missing WLAN service/API yields no readings; denied SSID/RSSI query leaves a connected interface with missing metadata/signal. Non-UTF-8 raw SSIDs are omitted so they cannot invalidate CBOR text in the agent response. Native synchronous WLAN calls cannot be interrupted by the Go deadline.
FreeBSD and other platforms: unsupported, empty snapshot. No approximation from ifconfig quality and no stale data retained.

Collectors retry each fresh poll, allowing interfaces and capabilities to appear without an agent restart. Standard agent response caching still applies. Existing hub record JSON storage requires no database schema migration. Older agents without the field keep the panel hidden. Native macOS/Windows runtime checks and real adapter testing are still required; cross compilation is not hardware proof.