Cron Job Migration Summary | Generated by AI

Home 2026.06

Comprehensive Summary:

WHAT WE DID ───────────

  1. Created a Hermes cron job to run ww appearance smart-auto every 2 minutes
  2. Updated weekly-repo-update schedule from “every Sunday 9AM” to “every hour”
  3. Migrated both jobs from Hermes internal scheduler to macOS system crontab
  4. Analyzed privacy implications of webcam-based smart-auto

CURRENT SYSTEM CRONTAB ────────────────────── /2 /opt/homebrew/bin/ww appearance smart-auto 0 * /opt/homebrew/bin/ww projects update

HOW ww appearance smart-auto WORKS ───────────────────────────────────── Source: /Users/lzwjava/projects/ww/ww/display/appearance.py (lines 96-181)

Step 1 — Capture: Uses imagesnap (preferred) or ffmpeg to grab one frame from webcam at 640x480 resolution Step 2 — Convert: Opens image with PIL, converts to grayscale (“L” mode) Step 3 — Analyze: Calculates average pixel brightness via numpy (0-255 scale) Step 4 — Decide: brightness < 80 (threshold) → dark mode brightness >= 80 → light mode Step 5 — Cleanup: Deletes temp JPEG in finally block (always runs)

PRIVACY ANALYSIS ──────────────── ✓ 100% local processing — no network calls, no API keys, no LLM ✓ Image deleted immediately after brightness calculation ✓ No data leaves the machine ✓ Webcam LED blinks during capture (visual indicator) ⚠ Every 2 minutes is frequent — green light will flicker often ⚠ If imagesnap/ffmpeg missing, command fails with error

WHAT ww projects update DOES ────────────────────────────── Pulls latest changes for 60 configured open source repos in ~/projects/

HERMES vs SYSTEM CRON ─────────────────────

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