40e85ab8d1
Standing steer (HJ, months): non-blocking behaviour + explicit execution priority. Telemetry is not on the ladder at all, yet it sat ON the order path, inline and able to raise — which is how it orphaned 6 live positions. Exec path now does exactly one thing: pack primitives, append to a bounded ring, return. No plane write, no snapshot construction, no I/O, no lock, no raise. Snapshot build + plane publish move to a daemon drain lane. Ring is deque(maxlen=4096): drops OLDEST on full and counts the drops — telemetry loss is always preferable to exec backpressure, but it stays observable. Measured: 1000 exec-path calls against a 2s-BLOCKING plane = 3.65 ms total (3.65 us/call). Inline, that was 2000 s of stall. Wedged lane + 50k pushes -> ring pinned at 4096, 45903 counted drops, exec path never backpressured. Healthy plane still gets 5/5. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>