upstream shipped officially 2026-08-13 (Bluesky Protocol Services). the waypoint moves d4dd2f0 -> 289b032 (v0.2.0); the server-side delta is PR #336, end-to-end kinds filtering, ported here for planSnapshot: a kinds mask on the request (unknown values and collections+kinds-excluding-commit are request errors, upstream's exact message), block selection admits sentinel $-collections per-kind instead of unconditionally (kinds=commit skips marker-only blocks; the marker-safe default keeps its pre-#336 meaning bit-for-bit), and segments with no collection index still fail open (stream-only: our archive has pre-index segments; upstream's cannot). subscribeEvents' kinds axis was already ported with the 0015 re-pin. differential oracle passes against upstream's released client (one overlay rename: WithBackfillOnly -> WithSnapshotOnly). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>