--if-stale: skip rebuild when no amxd input changed since the last successful build. Checks both committed diff (prev.piece_git…HEAD) and uncommitted working-tree changes under INPUT_PATHS (piece, bios, lib/, bundler.mjs). Deploy flow now passes this flag so infra- only commits don't trigger a 60s rebuild + restart cycle. --sync-spaces: after a successful build, PUTs the versioned amxd + latest.json + root alias to s3://assets-aesthetic-computer/m4l/ notepat.com/ via DigitalOcean Spaces. Mirrors ac-os OTA: versioned artifacts are immutable (long max-age + immutable cache-control), latest.json is no-cache so the piece's staleness check always sees fresh data. Credentials come from DO_SPACES_KEY/SECRET or AWS_*; gracefully warns + skips when absent. deploy.fish: sources /opt/ac/system/.env before running the build so lith's configured DO_SPACES creds reach the script. Build command becomes \`node ac-m4l/build-notepat.mjs --if-stale --sync-spaces\`. Also adds npm run notepat:publish for local dev publish (build + sync) without a full lith deploy.