rdmbair15m5-changelog-20260822-0415-sysctltty-prd-and-deep-configurator

Complete PRD, architectural specification, and visual studio for SysctlTTY (Darwin Kernel Limits & Resource Saturation Monitor), plus major upgrade to Master Studio with 65+ deep selectable options across 4 apps.

Scope

• Host: rdmbair15m5
• Projects: SysctlTTY, LogTTY.app, RTTy.app, rdreceipt.app

Exact files created / updated on ~/Desktop/

• ~/Desktop/sysctlmon_prd_and_architecture_v822.md (Comprehensive PRD & Architecture)
• ~/Desktop/sysctlmon_visual_studio_v822.html (Visual macOS window render with saturation gauges, velocity charts, PID attribution table, and tuner)
• ~/Desktop/observability_suite_master_studio.html (Upgraded with 65+ granular technical options across 4 accordion apps and dynamic Claude prompt compilation)

Key Technical Additions

1. Sysctl Limit & Velocity Engine: Real-time tracking of kern.maxfiles, kern.maxproc, kern.ipc.somaxconn, and vm.swapusage with first-derivative velocity ($dUsage/dt$) and Time-to-Failure (TTF) prediction.
2. PID Culprit Attribution: libproc.h (proc_pidinfo(PROC_PIDLISTFDS)) to pinpoint processes causing file descriptor table and Mach thread saturation.
3. Deep Multi-Option Matrix: Replaced simple checkboxes with 15–18 granular technical toggles per app in the interactive Master Studio.

Verification Evidence

• Verified valid Markdown and interactive HTML5 studio files created on ~/Desktop/.