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Cloudflare KV for Session Caching in Multi-Tenant FastAPI: Reducing PostgreSQL Load Without Redis Complexity

Cloudflare KV for Session Caching in Multi-Tenant FastAPI: Reducing PostgreSQL Load Without Redis Complexity Every SaaS I've built hits the same wall: session validation on every request hammers…

  • Cloudflare KV serves as Redis alternative for session caching in FastAPI
  • Reduces PostgreSQL load without managing Redis service complexity
  • CitizenApp successfully implemented this KV-based session caching

I built managed hosting for Hermes Agent so I could stop babysitting a VPS

The problem I run Hermes, an open-source agent with tools, memory, and cron built in. Before running my own managed service SaaS, I used various competitors to deploy on VPS.

  • Author built SEAOTTER, managed control plane for Hermes Agent.
  • SEAOTTER provides per-agent isolation with gVisor sandbox.
  • Service handles secrets via Google Secret Manager, no .env files.

Playwright Email Testing: A Real End-to-End Tutorial (No Mocks)

Most "email testing" advice ends at stubbing the send call. You assert that your app tried to send a message, and the test goes green.

  • Each test run uses a unique address for verification
  • MoeMail provides disposable-inbox API for CI suites
  • Playwright fixtures simplify inbox management in tests

Debian and the sirens

  • Author left Debian in 2005 due to rigidity
  • LLMs could make Debian overly rigid and dependent
  • Author reflects on 18 years of helping Debian mature

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