DBA-grade migration safety: expand-contract plans, lock-behavior analysis, batched backfills, forward+rollback and integrity checks (Postgres/MySQL · Prisma/Rails/Django)
A free retention check for one published short video: paste your average percentage viewed and get a PASS / REWORK / REBUILD verdict with the threshold shown, plus the single biggest retention leak named and one concrete fix.
Built around the part everyone gets wrong: when a key leaks you rotate it first — it's compromised the second it hits a remote, and bots scan public pushes within seconds. Scans staged changes, the working tree, and git history for provider key shapes, private keys, committed .env/credential files, and hardcoded creds — tuned for signal over noise so placeholders and $ENV refs don't cry wolf — then walks rotate → purge-from-history → move-to-env → add-a-pre-commit-hook, in the right order.
For one person publishing their own content on a schedule: describe your setup and get an operations kit that makes silent failures visible — a status board, a runbook with idempotent retry and queue-fallback patterns, an incident ledger, and a daily health-check specification.
Audit a machine learning platform against 62 production checks, or generate a verified AWS MLOps repository.
比較前後版本清單與依賴關係，找出變更影響及需要重審的項目。Compare declared revision dependencies and identify reviews needing renewal. Local Python download; no model required.