2026-08-09 — OS install concurrency

Added OS install concurrency: short practitioner framing for why parallel agent installs bounce (Windows _MSIExecute / 1618, Linux per-manager locks with optional apt wait) and why orchestration still needs a host-wide install mutex plus silent flags.

Deep OS essays and cooperation tables stay on News (Windows / Linux diptych); this page is the durable Antora bridge next to toolchain and agent-control-plane docs—not a product fix we own.

Nav + explanation index; Ibex “Related” pointer; News posts link back here.