Prompt
I'm tired of shipping one-off kill switch code
Latest observation
Oct 13, 2026
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Totally fair. A better pattern is to make “kill switches” a platform capability, not ad hoc code.
A clean approach:
- Centralize flags in one config service or table
- Define semantics up front:
- feature on/off
- percentage rollout
- environment-specific override
- emergency disable
- Create a small client library so product teams call the same API everywhere
- Add cached evaluation so runtime checks are cheap
- Make ops controls explicit:
- who can flip what
- audit logs
- TTL/expiry on temporary switches
- Separate emergency kill switches from feature flags
- emergency kill: fast, blunt, global, reliable
- feature flag: gradual rollout, targeting, experimentation
- Standardize defaults and fallback behavior
- if flag service is unavailable, fail open or closed intentionally
- Instrument everything
- flag evaluation metrics
- change notifications
- alerting on kill-switch activation
A simple mental model:
- Config source decides state
- SDK evaluates locally
- Control plane changes flags
- Service code only asks
isEnabled("x")
If you want, I can help you design:
- a minimal kill-switch system,
- a feature-flag platform architecture, or
- a migration plan from one-off switches to a shared library.