* README: point flatpak install at artifacts.latha.org The Worker moved out to its own repo (codegod100/artifacts, mirrored to nandi.uk/artifacts), generalized into a multi-app clearing house. Sleek's flatpak repo + .flatpakref were migrated to the new sleek/-prefixed R2 key layout and verified installing end-to-end from the new URL. proxy.latha.org is left running for now, undecided whether to decommission. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * flatpak: switch buck2 packaging from org.gnome.Platform//49 to org.freedesktop.Platform//25.08 ldd on the built //:sleek-host binary shows only libstdc++/libpipewire/ libasound/libc — no GTK/glib/adwaita (eframe/glow, not GTK) — so GNOME's runtime was pulling in a desktop stack the app never uses. 25.08 is the correctly-paired Freedesktop base version (org.gnome.Platform//49 itself declares org.freedesktop.Platform.GL//25.08 as its own GL extension, confirmed via `flatpak remote-info --show-metadata`). Updates flatpak.bzl's build-init invocation, flatpak/uk.nandi.sleek.json's runtime/sdk fields, and toolchains/rbe-image/Containerfile's baked-in system flatpak install + comments accordingly. flake.nix's nix2flatpak path is intentionally left on org.gnome.Platform//49 — nix2flatpak only ships a pre-built runtime index for org.gnome.Platform/org.kde.Platform, not org.freedesktop.Platform. --------- Co-authored-by: nandi <veronika.m.winters@gmail.com> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>