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> While documentation is often disliked, it is essential for configuration options, because [...] options are only added to a text file with a one-line comment at best.

This resonates. Feature Flags over time devolve into a lovely career of code archaeology.

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Explaining old feature flags to colleagues is always a fun time.

Sit down and let me tell you the tale of "enable_disable_foo_bar_on_web_phone_but_not_model_x_unless_year_is_even"

Old feature flag? Or UXO?

Or maybe even GAELN.

And tribal knowledge about the rationale behind the need! (sometimes not needed anymore once the issue is fixed but somehow the FF survives)

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