rdmsm4x-changelog-20260916-1155-sshd-instance-cap-remeasurement

Conducted read-only re-measurement of rdmsm4x sshd instance cap and mem0-mcp bridge census under ISSUE-20260905-12 using mandatory instruments.

• Scope: rdmsm4x host sshd telemetry & ticket store
• Ticket Handled: ISSUE-20260905-12 (claimed, re-measurement comment posted, claim released)
• Measurement Results:
  • sudo -n launchctl list | grep -c 'com.openssh.sshd\.': 24 live instances
  • pgrep -f sshd-session | wc -l: 48 processes (2 per connection)
  • pgrep -f bin/mem0-mcp | wc -l: 38 processes (18 local hub, 20 remote SSH bridges)
  • Headroom to 39: 15 slots remaining
  • Launchd inetd rejections in last 24h: 0
  • Cap hit since 09-15: No (0 rejections since 2026-09-15 00:00:00)
• Bridge Count by Source Host:
  • rdmsm4x (local): 18
  • rdmbair15m5: 11 bridges (over 12 established SSH connections)
  • rdmbair13m5: 5 bridges (multiplexed over 1 connection via ControlMaster)
  • rdmpw3265m: 3 bridges (over 5 established SSH connections)
  • rdmpw3275m: 1 bridge (over 3 established SSH connections)
• Remedy Urgency Assessment:
  • Current state is stable with 15 slots of headroom.
  • 83.3% of live instances are remote mem0-mcp bridges.
  • Expanding SSH ControlMaster from rdmbair13m5 to the other 4 spokes will reduce remote demand from 20+ to $\le 5$, expanding headroom from 15 to 30+ slots.
• Guardrails Preserved: Changed nothing, killed nothing, spawned no subagents, zero runtime edits.