The credentials, quota and scheduling traps explained once — plus working code and 3 Sheet templates, so your script still runs next month.

Your Python script works on your laptop. Then you schedule it and it breaks: the token expires after 7 days, 429 Quota exceeded, “service account doesn’t have permission”, or the job never fires. This kit is the missing second half of every Python + Google Sheets tutorial: how to run it unattended, and know why it stopped.

You get: a ~47-page PDF guide, the sheetskit Python toolkit (108 offline tests), the Connection Doctor, a request calculator, 3 GitHub Actions workflows, and 3 templates (CSV + XLSX).

• Credentials decision flow: service account vs OAuth vs Apps Script
• Why OAuth tokens die after 7 days — and the fix
• Quota-proof wrapper: backoff with jitter, rate limiter, batch helpers
• Request calculator for Google’s per-minute limits
• Connection Doctor: plain-English fixes for 18 common errors
• Idempotent upsert: re-run safely, never duplicate rows
• Control-panel button + weekly report with Slack/e-mail alerts

For people comfortable with pip install and running a script. Not for absolute beginners or no-code users. Needs Python 3.9+, a Google account, and optionally a free GitHub account.

Honest note: the code is offline-tested (mocked Google API) and live-tested against a real Google account.

Launch price €29 until 30 Nov 2026 (then €39).