Runtime feature flags let a solo developer toggle diagnostics and failover without deploying

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A developer running a small app on Cloudflare Workers describes controlling debug logging through a single Workers KV key with three states: off, admin, and all. The approach exists because redeploying just to enable logging takes too long when a user is waiting on a fix. The developer presented this at a Feature Flags talk, including a live demonstration of a forced failover. The talk also covered challenges encountered and lessons learned from doing so. The article asks readers whether they force failovers in production and whether those tests behaved as expected the first time.

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